/* * Copyright (C) 2005-2007 Brian Paul All Rights Reserved. * Copyright (C) 2008 VMware, Inc. All Rights Reserved. * Copyright © 2010 Intel Corporation * Copyright © 2011 Bryan Cain * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. */ /** * \file glsl_to_tgsi.cpp * * Translate GLSL IR to TGSI. */ #include #include "main/compiler.h" #include "ir.h" #include "ir_visitor.h" #include "ir_expression_flattening.h" #include "glsl_types.h" #include "glsl_parser_extras.h" #include "../glsl/program.h" #include "ir_optimization.h" #include "ast.h" #include "main/mtypes.h" #include "main/shaderobj.h" #include "main/uniforms.h" #include "program/hash_table.h" extern "C" { #include "main/shaderapi.h" #include "program/prog_instruction.h" #include "program/prog_optimize.h" #include "program/prog_print.h" #include "program/program.h" #include "program/prog_parameter.h" #include "program/sampler.h" #include "pipe/p_compiler.h" #include "pipe/p_context.h" #include "pipe/p_screen.h" #include "pipe/p_shader_tokens.h" #include "pipe/p_state.h" #include "util/u_math.h" #include "tgsi/tgsi_ureg.h" #include "tgsi/tgsi_info.h" #include "st_context.h" #include "st_program.h" #include "st_glsl_to_tgsi.h" #include "st_mesa_to_tgsi.h" } #define PROGRAM_IMMEDIATE PROGRAM_FILE_MAX #define PROGRAM_ANY_CONST ((1 << PROGRAM_LOCAL_PARAM) | \ (1 << PROGRAM_ENV_PARAM) | \ (1 << PROGRAM_STATE_VAR) | \ (1 << PROGRAM_CONSTANT) | \ (1 << PROGRAM_UNIFORM)) /** * Maximum number of temporary registers. * * It is too big for stack allocated arrays -- it will cause stack overflow on * Windows and likely Mac OS X. */ #define MAX_TEMPS 4096 /** * Maximum number of arrays */ #define MAX_ARRAYS 256 /* will be 4 for GLSL 4.00 */ #define MAX_GLSL_TEXTURE_OFFSET 1 class st_src_reg; class st_dst_reg; static int swizzle_for_size(int size); /** * This struct is a corresponding struct to TGSI ureg_src. */ class st_src_reg { public: st_src_reg(gl_register_file file, int index, const glsl_type *type) { this->file = file; this->index = index; if (type && (type->is_scalar() || type->is_vector() || type->is_matrix())) this->swizzle = swizzle_for_size(type->vector_elements); else this->swizzle = SWIZZLE_XYZW; this->negate = 0; this->index2D = 0; this->type = type ? type->base_type : GLSL_TYPE_ERROR; this->reladdr = NULL; this->reladdr2 = NULL; this->has_index2 = false; } st_src_reg(gl_register_file file, int index, int type) { this->type = type; this->file = file; this->index = index; this->index2D = 0; this->swizzle = SWIZZLE_XYZW; this->negate = 0; this->reladdr = NULL; this->reladdr2 = NULL; this->has_index2 = false; } st_src_reg(gl_register_file file, int index, int type, int index2D) { this->type = type; this->file = file; this->index = index; this->index2D = index2D; this->swizzle = SWIZZLE_XYZW; this->negate = 0; this->reladdr = NULL; this->reladdr2 = NULL; this->has_index2 = false; } st_src_reg() { this->type = GLSL_TYPE_ERROR; this->file = PROGRAM_UNDEFINED; this->index = 0; this->index2D = 0; this->swizzle = 0; this->negate = 0; this->reladdr = NULL; this->reladdr2 = NULL; this->has_index2 = false; } explicit st_src_reg(st_dst_reg reg); gl_register_file file; /**< PROGRAM_* from Mesa */ int index; /**< temporary index, VERT_ATTRIB_*, VARYING_SLOT_*, etc. */ int index2D; GLuint swizzle; /**< SWIZZLE_XYZWONEZERO swizzles from Mesa. */ int negate; /**< NEGATE_XYZW mask from mesa */ int type; /** GLSL_TYPE_* from GLSL IR (enum glsl_base_type) */ /** Register index should be offset by the integer in this reg. */ st_src_reg *reladdr; st_src_reg *reladdr2; bool has_index2; }; class st_dst_reg { public: st_dst_reg(gl_register_file file, int writemask, int type, int index) { this->file = file; this->index = index; this->writemask = writemask; this->cond_mask = COND_TR; this->reladdr = NULL; this->type = type; } st_dst_reg(gl_register_file file, int writemask, int type) { this->file = file; this->index = 0; this->writemask = writemask; this->cond_mask = COND_TR; this->reladdr = NULL; this->type = type; } st_dst_reg() { this->type = GLSL_TYPE_ERROR; this->file = PROGRAM_UNDEFINED; this->index = 0; this->writemask = 0; this->cond_mask = COND_TR; this->reladdr = NULL; } explicit st_dst_reg(st_src_reg reg); gl_register_file file; /**< PROGRAM_* from Mesa */ int index; /**< temporary index, VERT_ATTRIB_*, VARYING_SLOT_*, etc. */ int writemask; /**< Bitfield of WRITEMASK_[XYZW] */ GLuint cond_mask:4; int type; /** GLSL_TYPE_* from GLSL IR (enum glsl_base_type) */ /** Register index should be offset by the integer in this reg. */ st_src_reg *reladdr; }; st_src_reg::st_src_reg(st_dst_reg reg) { this->type = reg.type; this->file = reg.file; this->index = reg.index; this->swizzle = SWIZZLE_XYZW; this->negate = 0; this->reladdr = reg.reladdr; this->index2D = 0; this->reladdr2 = NULL; this->has_index2 = false; } st_dst_reg::st_dst_reg(st_src_reg reg) { this->type = reg.type; this->file = reg.file; this->index = reg.index; this->writemask = WRITEMASK_XYZW; this->cond_mask = COND_TR; this->reladdr = reg.reladdr; } class glsl_to_tgsi_instruction : public exec_node { public: DECLARE_RALLOC_CXX_OPERATORS(glsl_to_tgsi_instruction) unsigned op; st_dst_reg dst; st_src_reg src[3]; /** Pointer to the ir source this tree came from for debugging */ ir_instruction *ir; GLboolean cond_update; bool saturate; int sampler; /**< sampler index */ int tex_target; /**< One of TEXTURE_*_INDEX */ GLboolean tex_shadow; struct tgsi_texture_offset tex_offsets[MAX_GLSL_TEXTURE_OFFSET]; unsigned tex_offset_num_offset; int dead_mask; /**< Used in dead code elimination */ class function_entry *function; /* Set on TGSI_OPCODE_CAL or TGSI_OPCODE_BGNSUB */ }; class variable_storage : public exec_node { public: variable_storage(ir_variable *var, gl_register_file file, int index) : file(file), index(index), var(var) { /* empty */ } gl_register_file file; int index; ir_variable *var; /* variable that maps to this, if any */ }; class immediate_storage : public exec_node { public: immediate_storage(gl_constant_value *values, int size, int type) { memcpy(this->values, values, size * sizeof(gl_constant_value)); this->size = size; this->type = type; } gl_constant_value values[4]; int size; /**< Number of components (1-4) */ int type; /**< GL_FLOAT, GL_INT, GL_BOOL, or GL_UNSIGNED_INT */ }; class function_entry : public exec_node { public: ir_function_signature *sig; /** * identifier of this function signature used by the program. * * At the point that TGSI instructions for function calls are * generated, we don't know the address of the first instruction of * the function body. So we make the BranchTarget that is called a * small integer and rewrite them during set_branchtargets(). */ int sig_id; /** * Pointer to first instruction of the function body. * * Set during function body emits after main() is processed. */ glsl_to_tgsi_instruction *bgn_inst; /** * Index of the first instruction of the function body in actual TGSI. * * Set after conversion from glsl_to_tgsi_instruction to TGSI. */ int inst; /** Storage for the return value. */ st_src_reg return_reg; }; struct glsl_to_tgsi_visitor : public ir_visitor { public: glsl_to_tgsi_visitor(); ~glsl_to_tgsi_visitor(); function_entry *current_function; struct gl_context *ctx; struct gl_program *prog; struct gl_shader_program *shader_program; struct gl_shader_compiler_options *options; int next_temp; unsigned array_sizes[MAX_ARRAYS]; unsigned next_array; int num_address_regs; int samplers_used; bool indirect_addr_consts; int glsl_version; bool native_integers; bool have_sqrt; variable_storage *find_variable_storage(ir_variable *var); int add_constant(gl_register_file file, gl_constant_value values[4], int size, int datatype, GLuint *swizzle_out); function_entry *get_function_signature(ir_function_signature *sig); st_src_reg get_temp(const glsl_type *type); void reladdr_to_temp(ir_instruction *ir, st_src_reg *reg, int *num_reladdr); st_src_reg st_src_reg_for_float(float val); st_src_reg st_src_reg_for_int(int val); st_src_reg st_src_reg_for_type(int type, int val); /** * \name Visit methods * * As typical for the visitor pattern, there must be one \c visit method for * each concrete subclass of \c ir_instruction. Virtual base classes within * the hierarchy should not have \c visit methods. */ /*@{*/ virtual void visit(ir_variable *); virtual void visit(ir_loop *); virtual void visit(ir_loop_jump *); virtual void visit(ir_function_signature *); virtual void visit(ir_function *); virtual void visit(ir_expression *); virtual void visit(ir_swizzle *); virtual void visit(ir_dereference_variable *); virtual void visit(ir_dereference_array *); virtual void visit(ir_dereference_record *); virtual void visit(ir_assignment *); virtual void visit(ir_constant *); virtual void visit(ir_call *); virtual void visit(ir_return *); virtual void visit(ir_discard *); virtual void visit(ir_texture *); virtual void visit(ir_if *); virtual void visit(ir_emit_vertex *); virtual void visit(ir_end_primitive *); /*@}*/ st_src_reg result; /** List of variable_storage */ exec_list variables; /** List of immediate_storage */ exec_list immediates; unsigned num_immediates; /** List of function_entry */ exec_list function_signatures; int next_signature_id; /** List of glsl_to_tgsi_instruction */ exec_list instructions; glsl_to_tgsi_instruction *emit(ir_instruction *ir, unsigned op); glsl_to_tgsi_instruction *emit(ir_instruction *ir, unsigned op, st_dst_reg dst, st_src_reg src0); glsl_to_tgsi_instruction *emit(ir_instruction *ir, unsigned op, st_dst_reg dst, st_src_reg src0, st_src_reg src1); glsl_to_tgsi_instruction *emit(ir_instruction *ir, unsigned op, st_dst_reg dst, st_src_reg src0, st_src_reg src1, st_src_reg src2); unsigned get_opcode(ir_instruction *ir, unsigned op, st_dst_reg dst, st_src_reg src0, st_src_reg src1); /** * Emit the correct dot-product instruction for the type of arguments */ glsl_to_tgsi_instruction *emit_dp(ir_instruction *ir, st_dst_reg dst, st_src_reg src0, st_src_reg src1, unsigned elements); void emit_scalar(ir_instruction *ir, unsigned op, st_dst_reg dst, st_src_reg src0); void emit_scalar(ir_instruction *ir, unsigned op, st_dst_reg dst, st_src_reg src0, st_src_reg src1); void emit_arl(ir_instruction *ir, st_dst_reg dst, st_src_reg src0); void emit_scs(ir_instruction *ir, unsigned op, st_dst_reg dst, const st_src_reg &src); bool try_emit_mad(ir_expression *ir, int mul_operand); bool try_emit_mad_for_and_not(ir_expression *ir, int mul_operand); bool try_emit_sat(ir_expression *ir); void emit_swz(ir_expression *ir); bool process_move_condition(ir_rvalue *ir); void simplify_cmp(void); void rename_temp_register(int index, int new_index); int get_first_temp_read(int index); int get_first_temp_write(int index); int get_last_temp_read(int index); int get_last_temp_write(int index); void copy_propagate(void); void eliminate_dead_code(void); int eliminate_dead_code_advanced(void); void merge_registers(void); void renumber_registers(void); void emit_block_mov(ir_assignment *ir, const struct glsl_type *type, st_dst_reg *l, st_src_reg *r); void *mem_ctx; }; static st_src_reg undef_src = st_src_reg(PROGRAM_UNDEFINED, 0, GLSL_TYPE_ERROR); static st_dst_reg undef_dst = st_dst_reg(PROGRAM_UNDEFINED, SWIZZLE_NOOP, GLSL_TYPE_ERROR); static st_dst_reg address_reg = st_dst_reg(PROGRAM_ADDRESS, WRITEMASK_X, GLSL_TYPE_FLOAT, 0); static st_dst_reg address_reg2 = st_dst_reg(PROGRAM_ADDRESS, WRITEMASK_X, GLSL_TYPE_FLOAT, 1); static void fail_link(struct gl_shader_program *prog, const char *fmt, ...) PRINTFLIKE(2, 3); static void fail_link(struct gl_shader_program *prog, const char *fmt, ...) { va_list args; va_start(args, fmt); ralloc_vasprintf_append(&prog->InfoLog, fmt, args); va_end(args); prog->LinkStatus = GL_FALSE; } static int swizzle_for_size(int size) { int size_swizzles[4] = { MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_X, SWIZZLE_X, SWIZZLE_X), MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Y, SWIZZLE_Y), MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_Z), MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_W), }; assert((size >= 1) && (size <= 4)); return size_swizzles[size - 1]; } static bool is_tex_instruction(unsigned opcode) { const tgsi_opcode_info* info = tgsi_get_opcode_info(opcode); return info->is_tex; } static unsigned num_inst_dst_regs(unsigned opcode) { const tgsi_opcode_info* info = tgsi_get_opcode_info(opcode); return info->num_dst; } static unsigned num_inst_src_regs(unsigned opcode) { const tgsi_opcode_info* info = tgsi_get_opcode_info(opcode); return info->is_tex ? info->num_src - 1 : info->num_src; } glsl_to_tgsi_instruction * glsl_to_tgsi_visitor::emit(ir_instruction *ir, unsigned op, st_dst_reg dst, st_src_reg src0, st_src_reg src1, st_src_reg src2) { glsl_to_tgsi_instruction *inst = new(mem_ctx) glsl_to_tgsi_instruction(); int num_reladdr = 0, i; op = get_opcode(ir, op, dst, src0, src1); /* If we have to do relative addressing, we want to load the ARL * reg directly for one of the regs, and preload the other reladdr * sources into temps. */ num_reladdr += dst.reladdr != NULL; num_reladdr += src0.reladdr != NULL || src0.reladdr2 != NULL; num_reladdr += src1.reladdr != NULL || src1.reladdr2 != NULL; num_reladdr += src2.reladdr != NULL || src2.reladdr2 != NULL; reladdr_to_temp(ir, &src2, &num_reladdr); reladdr_to_temp(ir, &src1, &num_reladdr); reladdr_to_temp(ir, &src0, &num_reladdr); if (dst.reladdr) { emit_arl(ir, address_reg, *dst.reladdr); num_reladdr--; } assert(num_reladdr == 0); inst->op = op; inst->dst = dst; inst->src[0] = src0; inst->src[1] = src1; inst->src[2] = src2; inst->ir = ir; inst->dead_mask = 0; inst->function = NULL; /* Update indirect addressing status used by TGSI */ if (dst.reladdr) { switch(dst.file) { case PROGRAM_LOCAL_PARAM: case PROGRAM_ENV_PARAM: case PROGRAM_STATE_VAR: case PROGRAM_CONSTANT: case PROGRAM_UNIFORM: this->indirect_addr_consts = true; break; case PROGRAM_IMMEDIATE: assert(!"immediates should not have indirect addressing"); break; default: break; } } else { for (i=0; i<3; i++) { if(inst->src[i].reladdr) { switch(inst->src[i].file) { case PROGRAM_LOCAL_PARAM: case PROGRAM_ENV_PARAM: case PROGRAM_STATE_VAR: case PROGRAM_CONSTANT: case PROGRAM_UNIFORM: this->indirect_addr_consts = true; break; case PROGRAM_IMMEDIATE: assert(!"immediates should not have indirect addressing"); break; default: break; } } } } this->instructions.push_tail(inst); return inst; } glsl_to_tgsi_instruction * glsl_to_tgsi_visitor::emit(ir_instruction *ir, unsigned op, st_dst_reg dst, st_src_reg src0, st_src_reg src1) { return emit(ir, op, dst, src0, src1, undef_src); } glsl_to_tgsi_instruction * glsl_to_tgsi_visitor::emit(ir_instruction *ir, unsigned op, st_dst_reg dst, st_src_reg src0) { assert(dst.writemask != 0); return emit(ir, op, dst, src0, undef_src, undef_src); } glsl_to_tgsi_instruction * glsl_to_tgsi_visitor::emit(ir_instruction *ir, unsigned op) { return emit(ir, op, undef_dst, undef_src, undef_src, undef_src); } /** * Determines whether to use an integer, unsigned integer, or float opcode * based on the operands and input opcode, then emits the result. */ unsigned glsl_to_tgsi_visitor::get_opcode(ir_instruction *ir, unsigned op, st_dst_reg dst, st_src_reg src0, st_src_reg src1) { int type = GLSL_TYPE_FLOAT; assert(src0.type != GLSL_TYPE_ARRAY); assert(src0.type != GLSL_TYPE_STRUCT); assert(src1.type != GLSL_TYPE_ARRAY); assert(src1.type != GLSL_TYPE_STRUCT); if (src0.type == GLSL_TYPE_FLOAT || src1.type == GLSL_TYPE_FLOAT) type = GLSL_TYPE_FLOAT; else if (native_integers) type = src0.type == GLSL_TYPE_BOOL ? GLSL_TYPE_INT : src0.type; #define case4(c, f, i, u) \ case TGSI_OPCODE_##c: \ if (type == GLSL_TYPE_INT) \ op = TGSI_OPCODE_##i; \ else if (type == GLSL_TYPE_UINT) \ op = TGSI_OPCODE_##u; \ else \ op = TGSI_OPCODE_##f; \ break; #define case3(f, i, u) case4(f, f, i, u) #define case2fi(f, i) case4(f, f, i, i) #define case2iu(i, u) case4(i, LAST, i, u) #define casecomp(c, f, i, u) \ case TGSI_OPCODE_##c: \ if (type == GLSL_TYPE_INT) \ op = TGSI_OPCODE_##i; \ else if (type == GLSL_TYPE_UINT) \ op = TGSI_OPCODE_##u; \ else if (native_integers) \ op = TGSI_OPCODE_##f; \ else \ op = TGSI_OPCODE_##c; \ break; switch(op) { case2fi(ADD, UADD); case2fi(MUL, UMUL); case2fi(MAD, UMAD); case3(DIV, IDIV, UDIV); case3(MAX, IMAX, UMAX); case3(MIN, IMIN, UMIN); case2iu(MOD, UMOD); casecomp(SEQ, FSEQ, USEQ, USEQ); casecomp(SNE, FSNE, USNE, USNE); casecomp(SGE, FSGE, ISGE, USGE); casecomp(SLT, FSLT, ISLT, USLT); case2iu(ISHR, USHR); case2fi(SSG, ISSG); case3(ABS, IABS, IABS); default: break; } assert(op != TGSI_OPCODE_LAST); return op; } glsl_to_tgsi_instruction * glsl_to_tgsi_visitor::emit_dp(ir_instruction *ir, st_dst_reg dst, st_src_reg src0, st_src_reg src1, unsigned elements) { static const unsigned dot_opcodes[] = { TGSI_OPCODE_DP2, TGSI_OPCODE_DP3, TGSI_OPCODE_DP4 }; return emit(ir, dot_opcodes[elements - 2], dst, src0, src1); } /** * Emits TGSI scalar opcodes to produce unique answers across channels. * * Some TGSI opcodes are scalar-only, like ARB_fp/vp. The src X * channel determines the result across all channels. So to do a vec4 * of this operation, we want to emit a scalar per source channel used * to produce dest channels. */ void glsl_to_tgsi_visitor::emit_scalar(ir_instruction *ir, unsigned op, st_dst_reg dst, st_src_reg orig_src0, st_src_reg orig_src1) { int i, j; int done_mask = ~dst.writemask; /* TGSI RCP is a scalar operation splatting results to all channels, * like ARB_fp/vp. So emit as many RCPs as necessary to cover our * dst channels. */ for (i = 0; i < 4; i++) { GLuint this_mask = (1 << i); glsl_to_tgsi_instruction *inst; st_src_reg src0 = orig_src0; st_src_reg src1 = orig_src1; if (done_mask & this_mask) continue; GLuint src0_swiz = GET_SWZ(src0.swizzle, i); GLuint src1_swiz = GET_SWZ(src1.swizzle, i); for (j = i + 1; j < 4; j++) { /* If there is another enabled component in the destination that is * derived from the same inputs, generate its value on this pass as * well. */ if (!(done_mask & (1 << j)) && GET_SWZ(src0.swizzle, j) == src0_swiz && GET_SWZ(src1.swizzle, j) == src1_swiz) { this_mask |= (1 << j); } } src0.swizzle = MAKE_SWIZZLE4(src0_swiz, src0_swiz, src0_swiz, src0_swiz); src1.swizzle = MAKE_SWIZZLE4(src1_swiz, src1_swiz, src1_swiz, src1_swiz); inst = emit(ir, op, dst, src0, src1); inst->dst.writemask = this_mask; done_mask |= this_mask; } } void glsl_to_tgsi_visitor::emit_scalar(ir_instruction *ir, unsigned op, st_dst_reg dst, st_src_reg src0) { st_src_reg undef = undef_src; undef.swizzle = SWIZZLE_XXXX; emit_scalar(ir, op, dst, src0, undef); } void glsl_to_tgsi_visitor::emit_arl(ir_instruction *ir, st_dst_reg dst, st_src_reg src0) { int op = TGSI_OPCODE_ARL; if (src0.type == GLSL_TYPE_INT || src0.type == GLSL_TYPE_UINT) op = TGSI_OPCODE_UARL; assert(dst.file == PROGRAM_ADDRESS); if (dst.index >= this->num_address_regs) this->num_address_regs = dst.index + 1; emit(NULL, op, dst, src0); } /** * Emit an TGSI_OPCODE_SCS instruction * * The \c SCS opcode functions a bit differently than the other TGSI opcodes. * Instead of splatting its result across all four components of the * destination, it writes one value to the \c x component and another value to * the \c y component. * * \param ir IR instruction being processed * \param op Either \c TGSI_OPCODE_SIN or \c TGSI_OPCODE_COS depending * on which value is desired. * \param dst Destination register * \param src Source register */ void glsl_to_tgsi_visitor::emit_scs(ir_instruction *ir, unsigned op, st_dst_reg dst, const st_src_reg &src) { /* Vertex programs cannot use the SCS opcode. */ if (this->prog->Target == GL_VERTEX_PROGRAM_ARB) { emit_scalar(ir, op, dst, src); return; } const unsigned component = (op == TGSI_OPCODE_SIN) ? 0 : 1; const unsigned scs_mask = (1U << component); int done_mask = ~dst.writemask; st_src_reg tmp; assert(op == TGSI_OPCODE_SIN || op == TGSI_OPCODE_COS); /* If there are compnents in the destination that differ from the component * that will be written by the SCS instrution, we'll need a temporary. */ if (scs_mask != unsigned(dst.writemask)) { tmp = get_temp(glsl_type::vec4_type); } for (unsigned i = 0; i < 4; i++) { unsigned this_mask = (1U << i); st_src_reg src0 = src; if ((done_mask & this_mask) != 0) continue; /* The source swizzle specified which component of the source generates * sine / cosine for the current component in the destination. The SCS * instruction requires that this value be swizzle to the X component. * Replace the current swizzle with a swizzle that puts the source in * the X component. */ unsigned src0_swiz = GET_SWZ(src.swizzle, i); src0.swizzle = MAKE_SWIZZLE4(src0_swiz, src0_swiz, src0_swiz, src0_swiz); for (unsigned j = i + 1; j < 4; j++) { /* If there is another enabled component in the destination that is * derived from the same inputs, generate its value on this pass as * well. */ if (!(done_mask & (1 << j)) && GET_SWZ(src0.swizzle, j) == src0_swiz) { this_mask |= (1 << j); } } if (this_mask != scs_mask) { glsl_to_tgsi_instruction *inst; st_dst_reg tmp_dst = st_dst_reg(tmp); /* Emit the SCS instruction. */ inst = emit(ir, TGSI_OPCODE_SCS, tmp_dst, src0); inst->dst.writemask = scs_mask; /* Move the result of the SCS instruction to the desired location in * the destination. */ tmp.swizzle = MAKE_SWIZZLE4(component, component, component, component); inst = emit(ir, TGSI_OPCODE_SCS, dst, tmp); inst->dst.writemask = this_mask; } else { /* Emit the SCS instruction to write directly to the destination. */ glsl_to_tgsi_instruction *inst = emit(ir, TGSI_OPCODE_SCS, dst, src0); inst->dst.writemask = scs_mask; } done_mask |= this_mask; } } int glsl_to_tgsi_visitor::add_constant(gl_register_file file, gl_constant_value values[4], int size, int datatype, GLuint *swizzle_out) { if (file == PROGRAM_CONSTANT) { return _mesa_add_typed_unnamed_constant(this->prog->Parameters, values, size, datatype, swizzle_out); } else { int index = 0; immediate_storage *entry; assert(file == PROGRAM_IMMEDIATE); /* Search immediate storage to see if we already have an identical * immediate that we can use instead of adding a duplicate entry. */ foreach_iter(exec_list_iterator, iter, this->immediates) { entry = (immediate_storage *)iter.get(); if (entry->size == size && entry->type == datatype && !memcmp(entry->values, values, size * sizeof(gl_constant_value))) { return index; } index++; } /* Add this immediate to the list. */ entry = new(mem_ctx) immediate_storage(values, size, datatype); this->immediates.push_tail(entry); this->num_immediates++; return index; } } st_src_reg glsl_to_tgsi_visitor::st_src_reg_for_float(float val) { st_src_reg src(PROGRAM_IMMEDIATE, -1, GLSL_TYPE_FLOAT); union gl_constant_value uval; uval.f = val; src.index = add_constant(src.file, &uval, 1, GL_FLOAT, &src.swizzle); return src; } st_src_reg glsl_to_tgsi_visitor::st_src_reg_for_int(int val) { st_src_reg src(PROGRAM_IMMEDIATE, -1, GLSL_TYPE_INT); union gl_constant_value uval; assert(native_integers); uval.i = val; src.index = add_constant(src.file, &uval, 1, GL_INT, &src.swizzle); return src; } st_src_reg glsl_to_tgsi_visitor::st_src_reg_for_type(int type, int val) { if (native_integers) return type == GLSL_TYPE_FLOAT ? st_src_reg_for_float(val) : st_src_reg_for_int(val); else return st_src_reg_for_float(val); } static int type_size(const struct glsl_type *type) { unsigned int i; int size; switch (type->base_type) { case GLSL_TYPE_UINT: case GLSL_TYPE_INT: case GLSL_TYPE_FLOAT: case GLSL_TYPE_BOOL: if (type->is_matrix()) { return type->matrix_columns; } else { /* Regardless of size of vector, it gets a vec4. This is bad * packing for things like floats, but otherwise arrays become a * mess. Hopefully a later pass over the code can pack scalars * down if appropriate. */ return 1; } case GLSL_TYPE_ARRAY: assert(type->length > 0); return type_size(type->fields.array) * type->length; case GLSL_TYPE_STRUCT: size = 0; for (i = 0; i < type->length; i++) { size += type_size(type->fields.structure[i].type); } return size; case GLSL_TYPE_SAMPLER: /* Samplers take up one slot in UNIFORMS[], but they're baked in * at link time. */ return 1; case GLSL_TYPE_ATOMIC_UINT: case GLSL_TYPE_INTERFACE: case GLSL_TYPE_VOID: case GLSL_TYPE_ERROR: assert(!"Invalid type in type_size"); break; } return 0; } /** * In the initial pass of codegen, we assign temporary numbers to * intermediate results. (not SSA -- variable assignments will reuse * storage). */ st_src_reg glsl_to_tgsi_visitor::get_temp(const glsl_type *type) { st_src_reg src; src.type = native_integers ? type->base_type : GLSL_TYPE_FLOAT; src.reladdr = NULL; src.negate = 0; if (!options->EmitNoIndirectTemp && (type->is_array() || type->is_matrix())) { src.file = PROGRAM_ARRAY; src.index = next_array << 16 | 0x8000; array_sizes[next_array] = type_size(type); ++next_array; } else { src.file = PROGRAM_TEMPORARY; src.index = next_temp; next_temp += type_size(type); } if (type->is_array() || type->is_record()) { src.swizzle = SWIZZLE_NOOP; } else { src.swizzle = swizzle_for_size(type->vector_elements); } return src; } variable_storage * glsl_to_tgsi_visitor::find_variable_storage(ir_variable *var) { variable_storage *entry; foreach_iter(exec_list_iterator, iter, this->variables) { entry = (variable_storage *)iter.get(); if (entry->var == var) return entry; } return NULL; } void glsl_to_tgsi_visitor::visit(ir_variable *ir) { if (strcmp(ir->name, "gl_FragCoord") == 0) { struct gl_fragment_program *fp = (struct gl_fragment_program *)this->prog; fp->OriginUpperLeft = ir->origin_upper_left; fp->PixelCenterInteger = ir->pixel_center_integer; } if (ir->mode == ir_var_uniform && strncmp(ir->name, "gl_", 3) == 0) { unsigned int i; const ir_state_slot *const slots = ir->state_slots; assert(ir->state_slots != NULL); /* Check if this statevar's setup in the STATE file exactly * matches how we'll want to reference it as a * struct/array/whatever. If not, then we need to move it into * temporary storage and hope that it'll get copy-propagated * out. */ for (i = 0; i < ir->num_state_slots; i++) { if (slots[i].swizzle != SWIZZLE_XYZW) { break; } } variable_storage *storage; st_dst_reg dst; if (i == ir->num_state_slots) { /* We'll set the index later. */ storage = new(mem_ctx) variable_storage(ir, PROGRAM_STATE_VAR, -1); this->variables.push_tail(storage); dst = undef_dst; } else { /* The variable_storage constructor allocates slots based on the size * of the type. However, this had better match the number of state * elements that we're going to copy into the new temporary. */ assert((int) ir->num_state_slots == type_size(ir->type)); dst = st_dst_reg(get_temp(ir->type)); storage = new(mem_ctx) variable_storage(ir, dst.file, dst.index); this->variables.push_tail(storage); } for (unsigned int i = 0; i < ir->num_state_slots; i++) { int index = _mesa_add_state_reference(this->prog->Parameters, (gl_state_index *)slots[i].tokens); if (storage->file == PROGRAM_STATE_VAR) { if (storage->index == -1) { storage->index = index; } else { assert(index == storage->index + (int)i); } } else { /* We use GLSL_TYPE_FLOAT here regardless of the actual type of * the data being moved since MOV does not care about the type of * data it is moving, and we don't want to declare registers with * array or struct types. */ st_src_reg src(PROGRAM_STATE_VAR, index, GLSL_TYPE_FLOAT); src.swizzle = slots[i].swizzle; emit(ir, TGSI_OPCODE_MOV, dst, src); /* even a float takes up a whole vec4 reg in a struct/array. */ dst.index++; } } if (storage->file == PROGRAM_TEMPORARY && dst.index != storage->index + (int) ir->num_state_slots) { fail_link(this->shader_program, "failed to load builtin uniform `%s' (%d/%d regs loaded)\n", ir->name, dst.index - storage->index, type_size(ir->type)); } } } void glsl_to_tgsi_visitor::visit(ir_loop *ir) { ir_dereference_variable *counter = NULL; if (ir->counter != NULL) counter = new(ir) ir_dereference_variable(ir->counter); if (ir->from != NULL) { assert(ir->counter != NULL); ir_assignment *a = new(ir) ir_assignment(counter, ir->from, NULL); a->accept(this); delete a; } emit(NULL, TGSI_OPCODE_BGNLOOP); if (ir->to) { ir_expression *e = new(ir) ir_expression(ir->cmp, glsl_type::bool_type, counter, ir->to); ir_if *if_stmt = new(ir) ir_if(e); ir_loop_jump *brk = new(ir) ir_loop_jump(ir_loop_jump::jump_break); if_stmt->then_instructions.push_tail(brk); if_stmt->accept(this); delete if_stmt; delete e; delete brk; } visit_exec_list(&ir->body_instructions, this); if (ir->increment) { ir_expression *e = new(ir) ir_expression(ir_binop_add, counter->type, counter, ir->increment); ir_assignment *a = new(ir) ir_assignment(counter, e, NULL); a->accept(this); delete a; delete e; } emit(NULL, TGSI_OPCODE_ENDLOOP); } void glsl_to_tgsi_visitor::visit(ir_loop_jump *ir) { switch (ir->mode) { case ir_loop_jump::jump_break: emit(NULL, TGSI_OPCODE_BRK); break; case ir_loop_jump::jump_continue: emit(NULL, TGSI_OPCODE_CONT); break; } } void glsl_to_tgsi_visitor::visit(ir_function_signature *ir) { assert(0); (void)ir; } void glsl_to_tgsi_visitor::visit(ir_function *ir) { /* Ignore function bodies other than main() -- we shouldn't see calls to * them since they should all be inlined before we get to glsl_to_tgsi. */ if (strcmp(ir->name, "main") == 0) { const ir_function_signature *sig; exec_list empty; sig = ir->matching_signature(NULL, &empty); assert(sig); foreach_iter(exec_list_iterator, iter, sig->body) { ir_instruction *ir = (ir_instruction *)iter.get(); ir->accept(this); } } } bool glsl_to_tgsi_visitor::try_emit_mad(ir_expression *ir, int mul_operand) { int nonmul_operand = 1 - mul_operand; st_src_reg a, b, c; st_dst_reg result_dst; ir_expression *expr = ir->operands[mul_operand]->as_expression(); if (!expr || expr->operation != ir_binop_mul) return false; expr->operands[0]->accept(this); a = this->result; expr->operands[1]->accept(this); b = this->result; ir->operands[nonmul_operand]->accept(this); c = this->result; this->result = get_temp(ir->type); result_dst = st_dst_reg(this->result); result_dst.writemask = (1 << ir->type->vector_elements) - 1; emit(ir, TGSI_OPCODE_MAD, result_dst, a, b, c); return true; } /** * Emit MAD(a, -b, a) instead of AND(a, NOT(b)) * * The logic values are 1.0 for true and 0.0 for false. Logical-and is * implemented using multiplication, and logical-or is implemented using * addition. Logical-not can be implemented as (true - x), or (1.0 - x). * As result, the logical expression (a & !b) can be rewritten as: * * - a * !b * - a * (1 - b) * - (a * 1) - (a * b) * - a + -(a * b) * - a + (a * -b) * * This final expression can be implemented as a single MAD(a, -b, a) * instruction. */ bool glsl_to_tgsi_visitor::try_emit_mad_for_and_not(ir_expression *ir, int try_operand) { const int other_operand = 1 - try_operand; st_src_reg a, b; ir_expression *expr = ir->operands[try_operand]->as_expression(); if (!expr || expr->operation != ir_unop_logic_not) return false; ir->operands[other_operand]->accept(this); a = this->result; expr->operands[0]->accept(this); b = this->result; b.negate = ~b.negate; this->result = get_temp(ir->type); emit(ir, TGSI_OPCODE_MAD, st_dst_reg(this->result), a, b, a); return true; } bool glsl_to_tgsi_visitor::try_emit_sat(ir_expression *ir) { /* Emit saturates in the vertex shader only if SM 3.0 is supported. */ if (this->prog->Target == GL_VERTEX_PROGRAM_ARB && !st_context(this->ctx)->has_shader_model3) { return false; } ir_rvalue *sat_src = ir->as_rvalue_to_saturate(); if (!sat_src) return false; sat_src->accept(this); st_src_reg src = this->result; /* If we generated an expression instruction into a temporary in * processing the saturate's operand, apply the saturate to that * instruction. Otherwise, generate a MOV to do the saturate. * * Note that we have to be careful to only do this optimization if * the instruction in question was what generated src->result. For * example, ir_dereference_array might generate a MUL instruction * to create the reladdr, and return us a src reg using that * reladdr. That MUL result is not the value we're trying to * saturate. */ ir_expression *sat_src_expr = sat_src->as_expression(); if (sat_src_expr && (sat_src_expr->operation == ir_binop_mul || sat_src_expr->operation == ir_binop_add || sat_src_expr->operation == ir_binop_dot)) { glsl_to_tgsi_instruction *new_inst; new_inst = (glsl_to_tgsi_instruction *)this->instructions.get_tail(); new_inst->saturate = true; } else { this->result = get_temp(ir->type); st_dst_reg result_dst = st_dst_reg(this->result); result_dst.writemask = (1 << ir->type->vector_elements) - 1; glsl_to_tgsi_instruction *inst; inst = emit(ir, TGSI_OPCODE_MOV, result_dst, src); inst->saturate = true; } return true; } void glsl_to_tgsi_visitor::reladdr_to_temp(ir_instruction *ir, st_src_reg *reg, int *num_reladdr) { if (!reg->reladdr && !reg->reladdr2) return; if (reg->reladdr) emit_arl(ir, address_reg, *reg->reladdr); if (reg->reladdr2) emit_arl(ir, address_reg2, *reg->reladdr2); if (*num_reladdr != 1) { st_src_reg temp = get_temp(glsl_type::vec4_type); emit(ir, TGSI_OPCODE_MOV, st_dst_reg(temp), *reg); *reg = temp; } (*num_reladdr)--; } void glsl_to_tgsi_visitor::visit(ir_expression *ir) { unsigned int operand; st_src_reg op[Elements(ir->operands)]; st_src_reg result_src; st_dst_reg result_dst; /* Quick peephole: Emit MAD(a, b, c) instead of ADD(MUL(a, b), c) */ if (ir->operation == ir_binop_add) { if (try_emit_mad(ir, 1)) return; if (try_emit_mad(ir, 0)) return; } /* Quick peephole: Emit OPCODE_MAD(-a, -b, a) instead of AND(a, NOT(b)) */ if (ir->operation == ir_binop_logic_and) { if (try_emit_mad_for_and_not(ir, 1)) return; if (try_emit_mad_for_and_not(ir, 0)) return; } if (try_emit_sat(ir)) return; if (ir->operation == ir_quadop_vector) assert(!"ir_quadop_vector should have been lowered"); for (operand = 0; operand < ir->get_num_operands(); operand++) { this->result.file = PROGRAM_UNDEFINED; ir->operands[operand]->accept(this); if (this->result.file == PROGRAM_UNDEFINED) { printf("Failed to get tree for expression operand:\n"); ir->operands[operand]->print(); printf("\n"); exit(1); } op[operand] = this->result; /* Matrix expression operands should have been broken down to vector * operations already. */ assert(!ir->operands[operand]->type->is_matrix()); } int vector_elements = ir->operands[0]->type->vector_elements; if (ir->operands[1]) { vector_elements = MAX2(vector_elements, ir->operands[1]->type->vector_elements); } this->result.file = PROGRAM_UNDEFINED; /* Storage for our result. Ideally for an assignment we'd be using * the actual storage for the result here, instead. */ result_src = get_temp(ir->type); /* convenience for the emit functions below. */ result_dst = st_dst_reg(result_src); /* Limit writes to the channels that will be used by result_src later. * This does limit this temp's use as a temporary for multi-instruction * sequences. */ result_dst.writemask = (1 << ir->type->vector_elements) - 1; switch (ir->operation) { case ir_unop_logic_not: if (result_dst.type != GLSL_TYPE_FLOAT) emit(ir, TGSI_OPCODE_NOT, result_dst, op[0]); else { /* Previously 'SEQ dst, src, 0.0' was used for this. However, many * older GPUs implement SEQ using multiple instructions (i915 uses two * SGE instructions and a MUL instruction). Since our logic values are * 0.0 and 1.0, 1-x also implements !x. */ op[0].negate = ~op[0].negate; emit(ir, TGSI_OPCODE_ADD, result_dst, op[0], st_src_reg_for_float(1.0)); } break; case ir_unop_neg: if (result_dst.type == GLSL_TYPE_INT || result_dst.type == GLSL_TYPE_UINT) emit(ir, TGSI_OPCODE_INEG, result_dst, op[0]); else { op[0].negate = ~op[0].negate; result_src = op[0]; } break; case ir_unop_abs: emit(ir, TGSI_OPCODE_ABS, result_dst, op[0]); break; case ir_unop_sign: emit(ir, TGSI_OPCODE_SSG, result_dst, op[0]); break; case ir_unop_rcp: emit_scalar(ir, TGSI_OPCODE_RCP, result_dst, op[0]); break; case ir_unop_exp2: emit_scalar(ir, TGSI_OPCODE_EX2, result_dst, op[0]); break; case ir_unop_exp: case ir_unop_log: assert(!"not reached: should be handled by ir_explog_to_explog2"); break; case ir_unop_log2: emit_scalar(ir, TGSI_OPCODE_LG2, result_dst, op[0]); break; case ir_unop_sin: emit_scalar(ir, TGSI_OPCODE_SIN, result_dst, op[0]); break; case ir_unop_cos: emit_scalar(ir, TGSI_OPCODE_COS, result_dst, op[0]); break; case ir_unop_sin_reduced: emit_scs(ir, TGSI_OPCODE_SIN, result_dst, op[0]); break; case ir_unop_cos_reduced: emit_scs(ir, TGSI_OPCODE_COS, result_dst, op[0]); break; case ir_unop_dFdx: emit(ir, TGSI_OPCODE_DDX, result_dst, op[0]); break; case ir_unop_dFdy: { /* The X component contains 1 or -1 depending on whether the framebuffer * is a FBO or the window system buffer, respectively. * It is then multiplied with the source operand of DDY. */ static const gl_state_index transform_y_state[STATE_LENGTH] = { STATE_INTERNAL, STATE_FB_WPOS_Y_TRANSFORM }; unsigned transform_y_index = _mesa_add_state_reference(this->prog->Parameters, transform_y_state); st_src_reg transform_y = st_src_reg(PROGRAM_STATE_VAR, transform_y_index, glsl_type::vec4_type); transform_y.swizzle = SWIZZLE_XXXX; st_src_reg temp = get_temp(glsl_type::vec4_type); emit(ir, TGSI_OPCODE_MUL, st_dst_reg(temp), transform_y, op[0]); emit(ir, TGSI_OPCODE_DDY, result_dst, temp); break; } case ir_unop_noise: { /* At some point, a motivated person could add a better * implementation of noise. Currently not even the nvidia * binary drivers do anything more than this. In any case, the * place to do this is in the GL state tracker, not the poor * driver. */ emit(ir, TGSI_OPCODE_MOV, result_dst, st_src_reg_for_float(0.5)); break; } case ir_binop_add: emit(ir, TGSI_OPCODE_ADD, result_dst, op[0], op[1]); break; case ir_binop_sub: emit(ir, TGSI_OPCODE_SUB, result_dst, op[0], op[1]); break; case ir_binop_mul: emit(ir, TGSI_OPCODE_MUL, result_dst, op[0], op[1]); break; case ir_binop_div: if (result_dst.type == GLSL_TYPE_FLOAT) assert(!"not reached: should be handled by ir_div_to_mul_rcp"); else emit(ir, TGSI_OPCODE_DIV, result_dst, op[0], op[1]); break; case ir_binop_mod: if (result_dst.type == GLSL_TYPE_FLOAT) assert(!"ir_binop_mod should have been converted to b * fract(a/b)"); else emit(ir, TGSI_OPCODE_MOD, result_dst, op[0], op[1]); break; case ir_binop_less: emit(ir, TGSI_OPCODE_SLT, result_dst, op[0], op[1]); break; case ir_binop_greater: emit(ir, TGSI_OPCODE_SLT, result_dst, op[1], op[0]); break; case ir_binop_lequal: emit(ir, TGSI_OPCODE_SGE, result_dst, op[1], op[0]); break; case ir_binop_gequal: emit(ir, TGSI_OPCODE_SGE, result_dst, op[0], op[1]); break; case ir_binop_equal: emit(ir, TGSI_OPCODE_SEQ, result_dst, op[0], op[1]); break; case ir_binop_nequal: emit(ir, TGSI_OPCODE_SNE, result_dst, op[0], op[1]); break; case ir_binop_all_equal: /* "==" operator producing a scalar boolean. */ if (ir->operands[0]->type->is_vector() || ir->operands[1]->type->is_vector()) { st_src_reg temp = get_temp(native_integers ? glsl_type::get_instance(ir->operands[0]->type->base_type, 4, 1) : glsl_type::vec4_type); if (native_integers) { st_dst_reg temp_dst = st_dst_reg(temp); st_src_reg temp1 = st_src_reg(temp), temp2 = st_src_reg(temp); emit(ir, TGSI_OPCODE_SEQ, st_dst_reg(temp), op[0], op[1]); /* Emit 1-3 AND operations to combine the SEQ results. */ switch (ir->operands[0]->type->vector_elements) { case 2: break; case 3: temp_dst.writemask = WRITEMASK_Y; temp1.swizzle = SWIZZLE_YYYY; temp2.swizzle = SWIZZLE_ZZZZ; emit(ir, TGSI_OPCODE_AND, temp_dst, temp1, temp2); break; case 4: temp_dst.writemask = WRITEMASK_X; temp1.swizzle = SWIZZLE_XXXX; temp2.swizzle = SWIZZLE_YYYY; emit(ir, TGSI_OPCODE_AND, temp_dst, temp1, temp2); temp_dst.writemask = WRITEMASK_Y; temp1.swizzle = SWIZZLE_ZZZZ; temp2.swizzle = SWIZZLE_WWWW; emit(ir, TGSI_OPCODE_AND, temp_dst, temp1, temp2); } temp1.swizzle = SWIZZLE_XXXX; temp2.swizzle = SWIZZLE_YYYY; emit(ir, TGSI_OPCODE_AND, result_dst, temp1, temp2); } else { emit(ir, TGSI_OPCODE_SNE, st_dst_reg(temp), op[0], op[1]); /* After the dot-product, the value will be an integer on the * range [0,4]. Zero becomes 1.0, and positive values become zero. */ emit_dp(ir, result_dst, temp, temp, vector_elements); /* Negating the result of the dot-product gives values on the range * [-4, 0]. Zero becomes 1.0, and negative values become zero. * This is achieved using SGE. */ st_src_reg sge_src = result_src; sge_src.negate = ~sge_src.negate; emit(ir, TGSI_OPCODE_SGE, result_dst, sge_src, st_src_reg_for_float(0.0)); } } else { emit(ir, TGSI_OPCODE_SEQ, result_dst, op[0], op[1]); } break; case ir_binop_any_nequal: /* "!=" operator producing a scalar boolean. */ if (ir->operands[0]->type->is_vector() || ir->operands[1]->type->is_vector()) { st_src_reg temp = get_temp(native_integers ? glsl_type::get_instance(ir->operands[0]->type->base_type, 4, 1) : glsl_type::vec4_type); emit(ir, TGSI_OPCODE_SNE, st_dst_reg(temp), op[0], op[1]); if (native_integers) { st_dst_reg temp_dst = st_dst_reg(temp); st_src_reg temp1 = st_src_reg(temp), temp2 = st_src_reg(temp); /* Emit 1-3 OR operations to combine the SNE results. */ switch (ir->operands[0]->type->vector_elements) { case 2: break; case 3: temp_dst.writemask = WRITEMASK_Y; temp1.swizzle = SWIZZLE_YYYY; temp2.swizzle = SWIZZLE_ZZZZ; emit(ir, TGSI_OPCODE_OR, temp_dst, temp1, temp2); break; case 4: temp_dst.writemask = WRITEMASK_X; temp1.swizzle = SWIZZLE_XXXX; temp2.swizzle = SWIZZLE_YYYY; emit(ir, TGSI_OPCODE_OR, temp_dst, temp1, temp2); temp_dst.writemask = WRITEMASK_Y; temp1.swizzle = SWIZZLE_ZZZZ; temp2.swizzle = SWIZZLE_WWWW; emit(ir, TGSI_OPCODE_OR, temp_dst, temp1, temp2); } temp1.swizzle = SWIZZLE_XXXX; temp2.swizzle = SWIZZLE_YYYY; emit(ir, TGSI_OPCODE_OR, result_dst, temp1, temp2); } else { /* After the dot-product, the value will be an integer on the * range [0,4]. Zero stays zero, and positive values become 1.0. */ glsl_to_tgsi_instruction *const dp = emit_dp(ir, result_dst, temp, temp, vector_elements); if (this->prog->Target == GL_FRAGMENT_PROGRAM_ARB) { /* The clamping to [0,1] can be done for free in the fragment * shader with a saturate. */ dp->saturate = true; } else { /* Negating the result of the dot-product gives values on the range * [-4, 0]. Zero stays zero, and negative values become 1.0. This * achieved using SLT. */ st_src_reg slt_src = result_src; slt_src.negate = ~slt_src.negate; emit(ir, TGSI_OPCODE_SLT, result_dst, slt_src, st_src_reg_for_float(0.0)); } } } else { emit(ir, TGSI_OPCODE_SNE, result_dst, op[0], op[1]); } break; case ir_unop_any: { assert(ir->operands[0]->type->is_vector()); /* After the dot-product, the value will be an integer on the * range [0,4]. Zero stays zero, and positive values become 1.0. */ glsl_to_tgsi_instruction *const dp = emit_dp(ir, result_dst, op[0], op[0], ir->operands[0]->type->vector_elements); if (this->prog->Target == GL_FRAGMENT_PROGRAM_ARB && result_dst.type == GLSL_TYPE_FLOAT) { /* The clamping to [0,1] can be done for free in the fragment * shader with a saturate. */ dp->saturate = true; } else if (result_dst.type == GLSL_TYPE_FLOAT) { /* Negating the result of the dot-product gives values on the range * [-4, 0]. Zero stays zero, and negative values become 1.0. This * is achieved using SLT. */ st_src_reg slt_src = result_src; slt_src.negate = ~slt_src.negate; emit(ir, TGSI_OPCODE_SLT, result_dst, slt_src, st_src_reg_for_float(0.0)); } else { /* Use SNE 0 if integers are being used as boolean values. */ emit(ir, TGSI_OPCODE_SNE, result_dst, result_src, st_src_reg_for_int(0)); } break; } case ir_binop_logic_xor: if (native_integers) emit(ir, TGSI_OPCODE_XOR, result_dst, op[0], op[1]); else emit(ir, TGSI_OPCODE_SNE, result_dst, op[0], op[1]); break; case ir_binop_logic_or: { if (native_integers) { /* If integers are used as booleans, we can use an actual "or" * instruction. */ assert(native_integers); emit(ir, TGSI_OPCODE_OR, result_dst, op[0], op[1]); } else { /* After the addition, the value will be an integer on the * range [0,2]. Zero stays zero, and positive values become 1.0. */ glsl_to_tgsi_instruction *add = emit(ir, TGSI_OPCODE_ADD, result_dst, op[0], op[1]); if (this->prog->Target == GL_FRAGMENT_PROGRAM_ARB) { /* The clamping to [0,1] can be done for free in the fragment * shader with a saturate if floats are being used as boolean values. */ add->saturate = true; } else { /* Negating the result of the addition gives values on the range * [-2, 0]. Zero stays zero, and negative values become 1.0. This * is achieved using SLT. */ st_src_reg slt_src = result_src; slt_src.negate = ~slt_src.negate; emit(ir, TGSI_OPCODE_SLT, result_dst, slt_src, st_src_reg_for_float(0.0)); } } break; } case ir_binop_logic_and: /* If native integers are disabled, the bool args are stored as float 0.0 * or 1.0, so "mul" gives us "and". If they're enabled, just use the * actual AND opcode. */ if (native_integers) emit(ir, TGSI_OPCODE_AND, result_dst, op[0], op[1]); else emit(ir, TGSI_OPCODE_MUL, result_dst, op[0], op[1]); break; case ir_binop_dot: assert(ir->operands[0]->type->is_vector()); assert(ir->operands[0]->type == ir->operands[1]->type); emit_dp(ir, result_dst, op[0], op[1], ir->operands[0]->type->vector_elements); break; case ir_unop_sqrt: if (have_sqrt) { emit_scalar(ir, TGSI_OPCODE_SQRT, result_dst, op[0]); } else { /* sqrt(x) = x * rsq(x). */ emit_scalar(ir, TGSI_OPCODE_RSQ, result_dst, op[0]); emit(ir, TGSI_OPCODE_MUL, result_dst, result_src, op[0]); /* For incoming channels <= 0, set the result to 0. */ op[0].negate = ~op[0].negate; emit(ir, TGSI_OPCODE_CMP, result_dst, op[0], result_src, st_src_reg_for_float(0.0)); } break; case ir_unop_rsq: emit_scalar(ir, TGSI_OPCODE_RSQ, result_dst, op[0]); break; case ir_unop_i2f: if (native_integers) { emit(ir, TGSI_OPCODE_I2F, result_dst, op[0]); break; } /* fallthrough to next case otherwise */ case ir_unop_b2f: if (native_integers) { emit(ir, TGSI_OPCODE_AND, result_dst, op[0], st_src_reg_for_float(1.0)); break; } /* fallthrough to next case otherwise */ case ir_unop_i2u: case ir_unop_u2i: /* Converting between signed and unsigned integers is a no-op. */ result_src = op[0]; break; case ir_unop_b2i: if (native_integers) { /* Booleans are stored as integers using ~0 for true and 0 for false. * GLSL requires that int(bool) return 1 for true and 0 for false. * This conversion is done with AND, but it could be done with NEG. */ emit(ir, TGSI_OPCODE_AND, result_dst, op[0], st_src_reg_for_int(1)); } else { /* Booleans and integers are both stored as floats when native * integers are disabled. */ result_src = op[0]; } break; case ir_unop_f2i: if (native_integers) emit(ir, TGSI_OPCODE_F2I, result_dst, op[0]); else emit(ir, TGSI_OPCODE_TRUNC, result_dst, op[0]); break; case ir_unop_f2u: if (native_integers) emit(ir, TGSI_OPCODE_F2U, result_dst, op[0]); else emit(ir, TGSI_OPCODE_TRUNC, result_dst, op[0]); break; case ir_unop_bitcast_f2i: result_src = op[0]; result_src.type = GLSL_TYPE_INT; break; case ir_unop_bitcast_f2u: result_src = op[0]; result_src.type = GLSL_TYPE_UINT; break; case ir_unop_bitcast_i2f: case ir_unop_bitcast_u2f: result_src = op[0]; result_src.type = GLSL_TYPE_FLOAT; break; case ir_unop_f2b: emit(ir, TGSI_OPCODE_SNE, result_dst, op[0], st_src_reg_for_float(0.0)); break; case ir_unop_i2b: if (native_integers) emit(ir, TGSI_OPCODE_INEG, result_dst, op[0]); else emit(ir, TGSI_OPCODE_SNE, result_dst, op[0], st_src_reg_for_float(0.0)); break; case ir_unop_trunc: emit(ir, TGSI_OPCODE_TRUNC, result_dst, op[0]); break; case ir_unop_ceil: emit(ir, TGSI_OPCODE_CEIL, result_dst, op[0]); break; case ir_unop_floor: emit(ir, TGSI_OPCODE_FLR, result_dst, op[0]); break; case ir_unop_round_even: emit(ir, TGSI_OPCODE_ROUND, result_dst, op[0]); break; case ir_unop_fract: emit(ir, TGSI_OPCODE_FRC, result_dst, op[0]); break; case ir_binop_min: emit(ir, TGSI_OPCODE_MIN, result_dst, op[0], op[1]); break; case ir_binop_max: emit(ir, TGSI_OPCODE_MAX, result_dst, op[0], op[1]); break; case ir_binop_pow: emit_scalar(ir, TGSI_OPCODE_POW, result_dst, op[0], op[1]); break; case ir_unop_bit_not: if (native_integers) { emit(ir, TGSI_OPCODE_NOT, result_dst, op[0]); break; } case ir_unop_u2f: if (native_integers) { emit(ir, TGSI_OPCODE_U2F, result_dst, op[0]); break; } case ir_binop_lshift: if (native_integers) { emit(ir, TGSI_OPCODE_SHL, result_dst, op[0], op[1]); break; } case ir_binop_rshift: if (native_integers) { emit(ir, TGSI_OPCODE_ISHR, result_dst, op[0], op[1]); break; } case ir_binop_bit_and: if (native_integers) { emit(ir, TGSI_OPCODE_AND, result_dst, op[0], op[1]); break; } case ir_binop_bit_xor: if (native_integers) { emit(ir, TGSI_OPCODE_XOR, result_dst, op[0], op[1]); break; } case ir_binop_bit_or: if (native_integers) { emit(ir, TGSI_OPCODE_OR, result_dst, op[0], op[1]); break; } assert(!"GLSL 1.30 features unsupported"); break; case ir_binop_ubo_load: { ir_constant *uniform_block = ir->operands[0]->as_constant(); ir_constant *const_offset_ir = ir->operands[1]->as_constant(); unsigned const_offset = const_offset_ir ? const_offset_ir->value.u[0] : 0; st_src_reg index_reg = get_temp(glsl_type::uint_type); st_src_reg cbuf; cbuf.type = glsl_type::vec4_type->base_type; cbuf.file = PROGRAM_CONSTANT; cbuf.index = 0; cbuf.index2D = uniform_block->value.u[0] + 1; cbuf.reladdr = NULL; cbuf.negate = 0; assert(ir->type->is_vector() || ir->type->is_scalar()); if (const_offset_ir) { index_reg = st_src_reg_for_int(const_offset / 16); } else { emit(ir, TGSI_OPCODE_USHR, st_dst_reg(index_reg), op[1], st_src_reg_for_int(4)); } cbuf.swizzle = swizzle_for_size(ir->type->vector_elements); cbuf.swizzle += MAKE_SWIZZLE4(const_offset % 16 / 4, const_offset % 16 / 4, const_offset % 16 / 4, const_offset % 16 / 4); cbuf.reladdr = ralloc(mem_ctx, st_src_reg); memcpy(cbuf.reladdr, &index_reg, sizeof(index_reg)); if (ir->type->base_type == GLSL_TYPE_BOOL) { emit(ir, TGSI_OPCODE_USNE, result_dst, cbuf, st_src_reg_for_int(0)); } else { emit(ir, TGSI_OPCODE_MOV, result_dst, cbuf); } break; } case ir_triop_lrp: /* note: we have to reorder the three args here */ emit(ir, TGSI_OPCODE_LRP, result_dst, op[2], op[1], op[0]); break; case ir_triop_csel: if (this->ctx->Const.NativeIntegers) emit(ir, TGSI_OPCODE_UCMP, result_dst, op[0], op[1], op[2]); else { op[0].negate = ~op[0].negate; emit(ir, TGSI_OPCODE_CMP, result_dst, op[0], op[1], op[2]); } break; case ir_unop_pack_snorm_2x16: case ir_unop_pack_unorm_2x16: case ir_unop_pack_half_2x16: case ir_unop_pack_snorm_4x8: case ir_unop_pack_unorm_4x8: case ir_unop_unpack_snorm_2x16: case ir_unop_unpack_unorm_2x16: case ir_unop_unpack_half_2x16: case ir_unop_unpack_half_2x16_split_x: case ir_unop_unpack_half_2x16_split_y: case ir_unop_unpack_snorm_4x8: case ir_unop_unpack_unorm_4x8: case ir_binop_pack_half_2x16_split: case ir_unop_bitfield_reverse: case ir_unop_bit_count: case ir_unop_find_msb: case ir_unop_find_lsb: case ir_binop_bfm: case ir_triop_fma: case ir_triop_bfi: case ir_triop_bitfield_extract: case ir_quadop_bitfield_insert: case ir_quadop_vector: case ir_binop_vector_extract: case ir_triop_vector_insert: case ir_binop_ldexp: case ir_binop_carry: case ir_binop_borrow: case ir_binop_imul_high: /* This operation is not supported, or should have already been handled. */ assert(!"Invalid ir opcode in glsl_to_tgsi_visitor::visit()"); break; } this->result = result_src; } void glsl_to_tgsi_visitor::visit(ir_swizzle *ir) { st_src_reg src; int i; int swizzle[4]; /* Note that this is only swizzles in expressions, not those on the left * hand side of an assignment, which do write masking. See ir_assignment * for that. */ ir->val->accept(this); src = this->result; assert(src.file != PROGRAM_UNDEFINED); for (i = 0; i < 4; i++) { if (i < ir->type->vector_elements) { switch (i) { case 0: swizzle[i] = GET_SWZ(src.swizzle, ir->mask.x); break; case 1: swizzle[i] = GET_SWZ(src.swizzle, ir->mask.y); break; case 2: swizzle[i] = GET_SWZ(src.swizzle, ir->mask.z); break; case 3: swizzle[i] = GET_SWZ(src.swizzle, ir->mask.w); break; } } else { /* If the type is smaller than a vec4, replicate the last * channel out. */ swizzle[i] = swizzle[ir->type->vector_elements - 1]; } } src.swizzle = MAKE_SWIZZLE4(swizzle[0], swizzle[1], swizzle[2], swizzle[3]); this->result = src; } void glsl_to_tgsi_visitor::visit(ir_dereference_variable *ir) { variable_storage *entry = find_variable_storage(ir->var); ir_variable *var = ir->var; if (!entry) { switch (var->mode) { case ir_var_uniform: entry = new(mem_ctx) variable_storage(var, PROGRAM_UNIFORM, var->location); this->variables.push_tail(entry); break; case ir_var_shader_in: /* The linker assigns locations for varyings and attributes, * including deprecated builtins (like gl_Color), user-assign * generic attributes (glBindVertexLocation), and * user-defined varyings. */ assert(var->location != -1); entry = new(mem_ctx) variable_storage(var, PROGRAM_INPUT, var->location); break; case ir_var_shader_out: assert(var->location != -1); entry = new(mem_ctx) variable_storage(var, PROGRAM_OUTPUT, var->location + var->index); break; case ir_var_system_value: entry = new(mem_ctx) variable_storage(var, PROGRAM_SYSTEM_VALUE, var->location); break; case ir_var_auto: case ir_var_temporary: st_src_reg src = get_temp(var->type); entry = new(mem_ctx) variable_storage(var, src.file, src.index); this->variables.push_tail(entry); break; } if (!entry) { printf("Failed to make storage for %s\n", var->name); exit(1); } } this->result = st_src_reg(entry->file, entry->index, var->type); if (!native_integers) this->result.type = GLSL_TYPE_FLOAT; } void glsl_to_tgsi_visitor::visit(ir_dereference_array *ir) { ir_constant *index; st_src_reg src; int element_size = type_size(ir->type); bool is_2D_input; index = ir->array_index->constant_expression_value(); ir->array->accept(this); src = this->result; is_2D_input = this->prog->Target == GL_GEOMETRY_PROGRAM_NV && src.file == PROGRAM_INPUT && ir->array->ir_type != ir_type_dereference_array; if (is_2D_input) element_size = 1; if (index) { if (is_2D_input) { src.index2D = index->value.i[0]; src.has_index2 = true; } else src.index += index->value.i[0] * element_size; } else { /* Variable index array dereference. It eats the "vec4" of the * base of the array and an index that offsets the TGSI register * index. */ ir->array_index->accept(this); st_src_reg index_reg; if (element_size == 1) { index_reg = this->result; } else { index_reg = get_temp(native_integers ? glsl_type::int_type : glsl_type::float_type); emit(ir, TGSI_OPCODE_MUL, st_dst_reg(index_reg), this->result, st_src_reg_for_type(index_reg.type, element_size)); } /* If there was already a relative address register involved, add the * new and the old together to get the new offset. */ if (!is_2D_input && src.reladdr != NULL) { st_src_reg accum_reg = get_temp(native_integers ? glsl_type::int_type : glsl_type::float_type); emit(ir, TGSI_OPCODE_ADD, st_dst_reg(accum_reg), index_reg, *src.reladdr); index_reg = accum_reg; } if (is_2D_input) { src.reladdr2 = ralloc(mem_ctx, st_src_reg); memcpy(src.reladdr2, &index_reg, sizeof(index_reg)); src.index2D = 0; src.has_index2 = true; } else { src.reladdr = ralloc(mem_ctx, st_src_reg); memcpy(src.reladdr, &index_reg, sizeof(index_reg)); } } /* If the type is smaller than a vec4, replicate the last channel out. */ if (ir->type->is_scalar() || ir->type->is_vector()) src.swizzle = swizzle_for_size(ir->type->vector_elements); else src.swizzle = SWIZZLE_NOOP; /* Change the register type to the element type of the array. */ src.type = ir->type->base_type; this->result = src; } void glsl_to_tgsi_visitor::visit(ir_dereference_record *ir) { unsigned int i; const glsl_type *struct_type = ir->record->type; int offset = 0; ir->record->accept(this); for (i = 0; i < struct_type->length; i++) { if (strcmp(struct_type->fields.structure[i].name, ir->field) == 0) break; offset += type_size(struct_type->fields.structure[i].type); } /* If the type is smaller than a vec4, replicate the last channel out. */ if (ir->type->is_scalar() || ir->type->is_vector()) this->result.swizzle = swizzle_for_size(ir->type->vector_elements); else this->result.swizzle = SWIZZLE_NOOP; this->result.index += offset; this->result.type = ir->type->base_type; } /** * We want to be careful in assignment setup to hit the actual storage * instead of potentially using a temporary like we might with the * ir_dereference handler. */ static st_dst_reg get_assignment_lhs(ir_dereference *ir, glsl_to_tgsi_visitor *v) { /* The LHS must be a dereference. If the LHS is a variable indexed array * access of a vector, it must be separated into a series conditional moves * before reaching this point (see ir_vec_index_to_cond_assign). */ assert(ir->as_dereference()); ir_dereference_array *deref_array = ir->as_dereference_array(); if (deref_array) { assert(!deref_array->array->type->is_vector()); } /* Use the rvalue deref handler for the most part. We'll ignore * swizzles in it and write swizzles using writemask, though. */ ir->accept(v); return st_dst_reg(v->result); } /** * Process the condition of a conditional assignment * * Examines the condition of a conditional assignment to generate the optimal * first operand of a \c CMP instruction. If the condition is a relational * operator with 0 (e.g., \c ir_binop_less), the value being compared will be * used as the source for the \c CMP instruction. Otherwise the comparison * is processed to a boolean result, and the boolean result is used as the * operand to the CMP instruction. */ bool glsl_to_tgsi_visitor::process_move_condition(ir_rvalue *ir) { ir_rvalue *src_ir = ir; bool negate = true; bool switch_order = false; ir_expression *const expr = ir->as_expression(); if ((expr != NULL) && (expr->get_num_operands() == 2)) { bool zero_on_left = false; if (expr->operands[0]->is_zero()) { src_ir = expr->operands[1]; zero_on_left = true; } else if (expr->operands[1]->is_zero()) { src_ir = expr->operands[0]; zero_on_left = false; } /* a is - 0 + - 0 + * (a < 0) T F F ( a < 0) T F F * (0 < a) F F T (-a < 0) F F T * (a <= 0) T T F (-a < 0) F F T (swap order of other operands) * (0 <= a) F T T ( a < 0) T F F (swap order of other operands) * (a > 0) F F T (-a < 0) F F T * (0 > a) T F F ( a < 0) T F F * (a >= 0) F T T ( a < 0) T F F (swap order of other operands) * (0 >= a) T T F (-a < 0) F F T (swap order of other operands) * * Note that exchanging the order of 0 and 'a' in the comparison simply * means that the value of 'a' should be negated. */ if (src_ir != ir) { switch (expr->operation) { case ir_binop_less: switch_order = false; negate = zero_on_left; break; case ir_binop_greater: switch_order = false; negate = !zero_on_left; break; case ir_binop_lequal: switch_order = true; negate = !zero_on_left; break; case ir_binop_gequal: switch_order = true; negate = zero_on_left; break; default: /* This isn't the right kind of comparison afterall, so make sure * the whole condition is visited. */ src_ir = ir; break; } } } src_ir->accept(this); /* We use the TGSI_OPCODE_CMP (a < 0 ? b : c) for conditional moves, and the * condition we produced is 0.0 or 1.0. By flipping the sign, we can * choose which value TGSI_OPCODE_CMP produces without an extra instruction * computing the condition. */ if (negate) this->result.negate = ~this->result.negate; return switch_order; } void glsl_to_tgsi_visitor::emit_block_mov(ir_assignment *ir, const struct glsl_type *type, st_dst_reg *l, st_src_reg *r) { if (type->base_type == GLSL_TYPE_STRUCT) { for (unsigned int i = 0; i < type->length; i++) { emit_block_mov(ir, type->fields.structure[i].type, l, r); } return; } if (type->is_array()) { for (unsigned int i = 0; i < type->length; i++) { emit_block_mov(ir, type->fields.array, l, r); } return; } if (type->is_matrix()) { const struct glsl_type *vec_type; vec_type = glsl_type::get_instance(GLSL_TYPE_FLOAT, type->vector_elements, 1); for (int i = 0; i < type->matrix_columns; i++) { emit_block_mov(ir, vec_type, l, r); } return; } assert(type->is_scalar() || type->is_vector()); r->type = type->base_type; emit(ir, TGSI_OPCODE_MOV, *l, *r); l->index++; r->index++; } void glsl_to_tgsi_visitor::visit(ir_assignment *ir) { st_dst_reg l; st_src_reg r; int i; ir->rhs->accept(this); r = this->result; l = get_assignment_lhs(ir->lhs, this); /* FINISHME: This should really set to the correct maximal writemask for each * FINISHME: component written (in the loops below). This case can only * FINISHME: occur for matrices, arrays, and structures. */ if (ir->write_mask == 0) { assert(!ir->lhs->type->is_scalar() && !ir->lhs->type->is_vector()); l.writemask = WRITEMASK_XYZW; } else if (ir->lhs->type->is_scalar() && ir->lhs->variable_referenced()->mode == ir_var_shader_out) { /* FINISHME: This hack makes writing to gl_FragDepth, which lives in the * FINISHME: W component of fragment shader output zero, work correctly. */ l.writemask = WRITEMASK_XYZW; } else { int swizzles[4]; int first_enabled_chan = 0; int rhs_chan = 0; l.writemask = ir->write_mask; for (int i = 0; i < 4; i++) { if (l.writemask & (1 << i)) { first_enabled_chan = GET_SWZ(r.swizzle, i); break; } } /* Swizzle a small RHS vector into the channels being written. * * glsl ir treats write_mask as dictating how many channels are * present on the RHS while TGSI treats write_mask as just * showing which channels of the vec4 RHS get written. */ for (int i = 0; i < 4; i++) { if (l.writemask & (1 << i)) swizzles[i] = GET_SWZ(r.swizzle, rhs_chan++); else swizzles[i] = first_enabled_chan; } r.swizzle = MAKE_SWIZZLE4(swizzles[0], swizzles[1], swizzles[2], swizzles[3]); } assert(l.file != PROGRAM_UNDEFINED); assert(r.file != PROGRAM_UNDEFINED); if (ir->condition) { const bool switch_order = this->process_move_condition(ir->condition); st_src_reg condition = this->result; for (i = 0; i < type_size(ir->lhs->type); i++) { st_src_reg l_src = st_src_reg(l); st_src_reg condition_temp = condition; l_src.swizzle = swizzle_for_size(ir->lhs->type->vector_elements); if (native_integers) { /* This is necessary because TGSI's CMP instruction expects the * condition to be a float, and we store booleans as integers. * TODO: really want to avoid i2f path and use UCMP. Requires * changes to process_move_condition though too. */ condition_temp = get_temp(glsl_type::vec4_type); condition.negate = 0; emit(ir, TGSI_OPCODE_I2F, st_dst_reg(condition_temp), condition); condition_temp.swizzle = condition.swizzle; } if (switch_order) { emit(ir, TGSI_OPCODE_CMP, l, condition_temp, l_src, r); } else { emit(ir, TGSI_OPCODE_CMP, l, condition_temp, r, l_src); } l.index++; r.index++; } } else if (ir->rhs->as_expression() && this->instructions.get_tail() && ir->rhs == ((glsl_to_tgsi_instruction *)this->instructions.get_tail())->ir && type_size(ir->lhs->type) == 1 && l.writemask == ((glsl_to_tgsi_instruction *)this->instructions.get_tail())->dst.writemask) { /* To avoid emitting an extra MOV when assigning an expression to a * variable, emit the last instruction of the expression again, but * replace the destination register with the target of the assignment. * Dead code elimination will remove the original instruction. */ glsl_to_tgsi_instruction *inst, *new_inst; inst = (glsl_to_tgsi_instruction *)this->instructions.get_tail(); new_inst = emit(ir, inst->op, l, inst->src[0], inst->src[1], inst->src[2]); new_inst->saturate = inst->saturate; inst->dead_mask = inst->dst.writemask; } else { emit_block_mov(ir, ir->rhs->type, &l, &r); } } void glsl_to_tgsi_visitor::visit(ir_constant *ir) { st_src_reg src; GLfloat stack_vals[4] = { 0 }; gl_constant_value *values = (gl_constant_value *) stack_vals; GLenum gl_type = GL_NONE; unsigned int i; static int in_array = 0; gl_register_file file = in_array ? PROGRAM_CONSTANT : PROGRAM_IMMEDIATE; /* Unfortunately, 4 floats is all we can get into * _mesa_add_typed_unnamed_constant. So, make a temp to store an * aggregate constant and move each constant value into it. If we * get lucky, copy propagation will eliminate the extra moves. */ if (ir->type->base_type == GLSL_TYPE_STRUCT) { st_src_reg temp_base = get_temp(ir->type); st_dst_reg temp = st_dst_reg(temp_base); foreach_iter(exec_list_iterator, iter, ir->components) { ir_constant *field_value = (ir_constant *)iter.get(); int size = type_size(field_value->type); assert(size > 0); field_value->accept(this); src = this->result; for (i = 0; i < (unsigned int)size; i++) { emit(ir, TGSI_OPCODE_MOV, temp, src); src.index++; temp.index++; } } this->result = temp_base; return; } if (ir->type->is_array()) { st_src_reg temp_base = get_temp(ir->type); st_dst_reg temp = st_dst_reg(temp_base); int size = type_size(ir->type->fields.array); assert(size > 0); in_array++; for (i = 0; i < ir->type->length; i++) { ir->array_elements[i]->accept(this); src = this->result; for (int j = 0; j < size; j++) { emit(ir, TGSI_OPCODE_MOV, temp, src); src.index++; temp.index++; } } this->result = temp_base; in_array--; return; } if (ir->type->is_matrix()) { st_src_reg mat = get_temp(ir->type); st_dst_reg mat_column = st_dst_reg(mat); for (i = 0; i < ir->type->matrix_columns; i++) { assert(ir->type->base_type == GLSL_TYPE_FLOAT); values = (gl_constant_value *) &ir->value.f[i * ir->type->vector_elements]; src = st_src_reg(file, -1, ir->type->base_type); src.index = add_constant(file, values, ir->type->vector_elements, GL_FLOAT, &src.swizzle); emit(ir, TGSI_OPCODE_MOV, mat_column, src); mat_column.index++; } this->result = mat; return; } switch (ir->type->base_type) { case GLSL_TYPE_FLOAT: gl_type = GL_FLOAT; for (i = 0; i < ir->type->vector_elements; i++) { values[i].f = ir->value.f[i]; } break; case GLSL_TYPE_UINT: gl_type = native_integers ? GL_UNSIGNED_INT : GL_FLOAT; for (i = 0; i < ir->type->vector_elements; i++) { if (native_integers) values[i].u = ir->value.u[i]; else values[i].f = ir->value.u[i]; } break; case GLSL_TYPE_INT: gl_type = native_integers ? GL_INT : GL_FLOAT; for (i = 0; i < ir->type->vector_elements; i++) { if (native_integers) values[i].i = ir->value.i[i]; else values[i].f = ir->value.i[i]; } break; case GLSL_TYPE_BOOL: gl_type = native_integers ? GL_BOOL : GL_FLOAT; for (i = 0; i < ir->type->vector_elements; i++) { if (native_integers) values[i].u = ir->value.b[i] ? ~0 : 0; else values[i].f = ir->value.b[i]; } break; default: assert(!"Non-float/uint/int/bool constant"); } this->result = st_src_reg(file, -1, ir->type); this->result.index = add_constant(file, values, ir->type->vector_elements, gl_type, &this->result.swizzle); } function_entry * glsl_to_tgsi_visitor::get_function_signature(ir_function_signature *sig) { function_entry *entry; foreach_iter(exec_list_iterator, iter, this->function_signatures) { entry = (function_entry *)iter.get(); if (entry->sig == sig) return entry; } entry = ralloc(mem_ctx, function_entry); entry->sig = sig; entry->sig_id = this->next_signature_id++; entry->bgn_inst = NULL; /* Allocate storage for all the parameters. */ foreach_iter(exec_list_iterator, iter, sig->parameters) { ir_variable *param = (ir_variable *)iter.get(); variable_storage *storage; storage = find_variable_storage(param); assert(!storage); st_src_reg src = get_temp(param->type); storage = new(mem_ctx) variable_storage(param, src.file, src.index); this->variables.push_tail(storage); } if (!sig->return_type->is_void()) { entry->return_reg = get_temp(sig->return_type); } else { entry->return_reg = undef_src; } this->function_signatures.push_tail(entry); return entry; } void glsl_to_tgsi_visitor::visit(ir_call *ir) { glsl_to_tgsi_instruction *call_inst; ir_function_signature *sig = ir->callee; function_entry *entry = get_function_signature(sig); int i; /* Process in parameters. */ exec_list_iterator sig_iter = sig->parameters.iterator(); foreach_iter(exec_list_iterator, iter, *ir) { ir_rvalue *param_rval = (ir_rvalue *)iter.get(); ir_variable *param = (ir_variable *)sig_iter.get(); if (param->mode == ir_var_function_in || param->mode == ir_var_function_inout) { variable_storage *storage = find_variable_storage(param); assert(storage); param_rval->accept(this); st_src_reg r = this->result; st_dst_reg l; l.file = storage->file; l.index = storage->index; l.reladdr = NULL; l.writemask = WRITEMASK_XYZW; l.cond_mask = COND_TR; for (i = 0; i < type_size(param->type); i++) { emit(ir, TGSI_OPCODE_MOV, l, r); l.index++; r.index++; } } sig_iter.next(); } assert(!sig_iter.has_next()); /* Emit call instruction */ call_inst = emit(ir, TGSI_OPCODE_CAL); call_inst->function = entry; /* Process out parameters. */ sig_iter = sig->parameters.iterator(); foreach_iter(exec_list_iterator, iter, *ir) { ir_rvalue *param_rval = (ir_rvalue *)iter.get(); ir_variable *param = (ir_variable *)sig_iter.get(); if (param->mode == ir_var_function_out || param->mode == ir_var_function_inout) { variable_storage *storage = find_variable_storage(param); assert(storage); st_src_reg r; r.file = storage->file; r.index = storage->index; r.reladdr = NULL; r.swizzle = SWIZZLE_NOOP; r.negate = 0; param_rval->accept(this); st_dst_reg l = st_dst_reg(this->result); for (i = 0; i < type_size(param->type); i++) { emit(ir, TGSI_OPCODE_MOV, l, r); l.index++; r.index++; } } sig_iter.next(); } assert(!sig_iter.has_next()); /* Process return value. */ this->result = entry->return_reg; } void glsl_to_tgsi_visitor::visit(ir_texture *ir) { st_src_reg result_src, coord, cube_sc, lod_info, projector, dx, dy, offset, sample_index; st_dst_reg result_dst, coord_dst, cube_sc_dst; glsl_to_tgsi_instruction *inst = NULL; unsigned opcode = TGSI_OPCODE_NOP; const glsl_type *sampler_type = ir->sampler->type; bool is_cube_array = false; /* if we are a cube array sampler */ if ((sampler_type->sampler_dimensionality == GLSL_SAMPLER_DIM_CUBE && sampler_type->sampler_array)) { is_cube_array = true; } if (ir->coordinate) { ir->coordinate->accept(this); /* Put our coords in a temp. We'll need to modify them for shadow, * projection, or LOD, so the only case we'd use it as is is if * we're doing plain old texturing. The optimization passes on * glsl_to_tgsi_visitor should handle cleaning up our mess in that case. */ coord = get_temp(glsl_type::vec4_type); coord_dst = st_dst_reg(coord); coord_dst.writemask = (1 << ir->coordinate->type->vector_elements) - 1; emit(ir, TGSI_OPCODE_MOV, coord_dst, this->result); } if (ir->projector) { ir->projector->accept(this); projector = this->result; } /* Storage for our result. Ideally for an assignment we'd be using * the actual storage for the result here, instead. */ result_src = get_temp(ir->type); result_dst = st_dst_reg(result_src); switch (ir->op) { case ir_tex: opcode = (is_cube_array && ir->shadow_comparitor) ? TGSI_OPCODE_TEX2 : TGSI_OPCODE_TEX; if (ir->offset) { ir->offset->accept(this); offset = this->result; } break; case ir_txb: opcode = is_cube_array ? TGSI_OPCODE_TXB2 : TGSI_OPCODE_TXB; ir->lod_info.bias->accept(this); lod_info = this->result; if (ir->offset) { ir->offset->accept(this); offset = this->result; } break; case ir_txl: opcode = is_cube_array ? TGSI_OPCODE_TXL2 : TGSI_OPCODE_TXL; ir->lod_info.lod->accept(this); lod_info = this->result; if (ir->offset) { ir->offset->accept(this); offset = this->result; } break; case ir_txd: opcode = TGSI_OPCODE_TXD; ir->lod_info.grad.dPdx->accept(this); dx = this->result; ir->lod_info.grad.dPdy->accept(this); dy = this->result; if (ir->offset) { ir->offset->accept(this); offset = this->result; } break; case ir_txs: opcode = TGSI_OPCODE_TXQ; ir->lod_info.lod->accept(this); lod_info = this->result; break; case ir_txf: opcode = TGSI_OPCODE_TXF; ir->lod_info.lod->accept(this); lod_info = this->result; if (ir->offset) { ir->offset->accept(this); offset = this->result; } break; case ir_txf_ms: opcode = TGSI_OPCODE_TXF; ir->lod_info.sample_index->accept(this); sample_index = this->result; break; case ir_lod: assert(!"Unexpected ir_lod opcode"); break; case ir_tg4: assert(!"Unexpected ir_tg4 opcode"); break; case ir_query_levels: assert(!"Unexpected ir_query_levels opcode"); break; } if (ir->projector) { if (opcode == TGSI_OPCODE_TEX) { /* Slot the projector in as the last component of the coord. */ coord_dst.writemask = WRITEMASK_W; emit(ir, TGSI_OPCODE_MOV, coord_dst, projector); coord_dst.writemask = WRITEMASK_XYZW; opcode = TGSI_OPCODE_TXP; } else { st_src_reg coord_w = coord; coord_w.swizzle = SWIZZLE_WWWW; /* For the other TEX opcodes there's no projective version * since the last slot is taken up by LOD info. Do the * projective divide now. */ coord_dst.writemask = WRITEMASK_W; emit(ir, TGSI_OPCODE_RCP, coord_dst, projector); /* In the case where we have to project the coordinates "by hand," * the shadow comparator value must also be projected. */ st_src_reg tmp_src = coord; if (ir->shadow_comparitor) { /* Slot the shadow value in as the second to last component of the * coord. */ ir->shadow_comparitor->accept(this); tmp_src = get_temp(glsl_type::vec4_type); st_dst_reg tmp_dst = st_dst_reg(tmp_src); /* Projective division not allowed for array samplers. */ assert(!sampler_type->sampler_array); tmp_dst.writemask = WRITEMASK_Z; emit(ir, TGSI_OPCODE_MOV, tmp_dst, this->result); tmp_dst.writemask = WRITEMASK_XY; emit(ir, TGSI_OPCODE_MOV, tmp_dst, coord); } coord_dst.writemask = WRITEMASK_XYZ; emit(ir, TGSI_OPCODE_MUL, coord_dst, tmp_src, coord_w); coord_dst.writemask = WRITEMASK_XYZW; coord.swizzle = SWIZZLE_XYZW; } } /* If projection is done and the opcode is not TGSI_OPCODE_TXP, then the shadow * comparator was put in the correct place (and projected) by the code, * above, that handles by-hand projection. */ if (ir->shadow_comparitor && (!ir->projector || opcode == TGSI_OPCODE_TXP)) { /* Slot the shadow value in as the second to last component of the * coord. */ ir->shadow_comparitor->accept(this); if (is_cube_array) { cube_sc = get_temp(glsl_type::float_type); cube_sc_dst = st_dst_reg(cube_sc); cube_sc_dst.writemask = WRITEMASK_X; emit(ir, TGSI_OPCODE_MOV, cube_sc_dst, this->result); cube_sc_dst.writemask = WRITEMASK_X; } else { if ((sampler_type->sampler_dimensionality == GLSL_SAMPLER_DIM_2D && sampler_type->sampler_array) || sampler_type->sampler_dimensionality == GLSL_SAMPLER_DIM_CUBE) { coord_dst.writemask = WRITEMASK_W; } else { coord_dst.writemask = WRITEMASK_Z; } emit(ir, TGSI_OPCODE_MOV, coord_dst, this->result); coord_dst.writemask = WRITEMASK_XYZW; } } if (ir->op == ir_txf_ms) { coord_dst.writemask = WRITEMASK_W; emit(ir, TGSI_OPCODE_MOV, coord_dst, sample_index); coord_dst.writemask = WRITEMASK_XYZW; } else if (opcode == TGSI_OPCODE_TXL || opcode == TGSI_OPCODE_TXB || opcode == TGSI_OPCODE_TXF) { /* TGSI stores LOD or LOD bias in the last channel of the coords. */ coord_dst.writemask = WRITEMASK_W; emit(ir, TGSI_OPCODE_MOV, coord_dst, lod_info); coord_dst.writemask = WRITEMASK_XYZW; } if (opcode == TGSI_OPCODE_TXD) inst = emit(ir, opcode, result_dst, coord, dx, dy); else if (opcode == TGSI_OPCODE_TXQ) inst = emit(ir, opcode, result_dst, lod_info); else if (opcode == TGSI_OPCODE_TXF) { inst = emit(ir, opcode, result_dst, coord); } else if (opcode == TGSI_OPCODE_TXL2 || opcode == TGSI_OPCODE_TXB2) { inst = emit(ir, opcode, result_dst, coord, lod_info); } else if (opcode == TGSI_OPCODE_TEX2) { inst = emit(ir, opcode, result_dst, coord, cube_sc); } else inst = emit(ir, opcode, result_dst, coord); if (ir->shadow_comparitor) inst->tex_shadow = GL_TRUE; inst->sampler = _mesa_get_sampler_uniform_value(ir->sampler, this->shader_program, this->prog); if (ir->offset) { inst->tex_offset_num_offset = 1; inst->tex_offsets[0].Index = offset.index; inst->tex_offsets[0].File = offset.file; inst->tex_offsets[0].SwizzleX = GET_SWZ(offset.swizzle, 0); inst->tex_offsets[0].SwizzleY = GET_SWZ(offset.swizzle, 1); inst->tex_offsets[0].SwizzleZ = GET_SWZ(offset.swizzle, 2); } switch (sampler_type->sampler_dimensionality) { case GLSL_SAMPLER_DIM_1D: inst->tex_target = (sampler_type->sampler_array) ? TEXTURE_1D_ARRAY_INDEX : TEXTURE_1D_INDEX; break; case GLSL_SAMPLER_DIM_2D: inst->tex_target = (sampler_type->sampler_array) ? TEXTURE_2D_ARRAY_INDEX : TEXTURE_2D_INDEX; break; case GLSL_SAMPLER_DIM_3D: inst->tex_target = TEXTURE_3D_INDEX; break; case GLSL_SAMPLER_DIM_CUBE: inst->tex_target = (sampler_type->sampler_array) ? TEXTURE_CUBE_ARRAY_INDEX : TEXTURE_CUBE_INDEX; break; case GLSL_SAMPLER_DIM_RECT: inst->tex_target = TEXTURE_RECT_INDEX; break; case GLSL_SAMPLER_DIM_BUF: inst->tex_target = TEXTURE_BUFFER_INDEX; break; case GLSL_SAMPLER_DIM_EXTERNAL: inst->tex_target = TEXTURE_EXTERNAL_INDEX; break; case GLSL_SAMPLER_DIM_MS: inst->tex_target = (sampler_type->sampler_array) ? TEXTURE_2D_MULTISAMPLE_ARRAY_INDEX : TEXTURE_2D_MULTISAMPLE_INDEX; break; default: assert(!"Should not get here."); } this->result = result_src; } void glsl_to_tgsi_visitor::visit(ir_return *ir) { if (ir->get_value()) { st_dst_reg l; int i; assert(current_function); ir->get_value()->accept(this); st_src_reg r = this->result; l = st_dst_reg(current_function->return_reg); for (i = 0; i < type_size(current_function->sig->return_type); i++) { emit(ir, TGSI_OPCODE_MOV, l, r); l.index++; r.index++; } } emit(ir, TGSI_OPCODE_RET); } void glsl_to_tgsi_visitor::visit(ir_discard *ir) { if (ir->condition) { ir->condition->accept(this); this->result.negate = ~this->result.negate; emit(ir, TGSI_OPCODE_KILL_IF, undef_dst, this->result); } else { /* unconditional kil */ emit(ir, TGSI_OPCODE_KILL); } } void glsl_to_tgsi_visitor::visit(ir_if *ir) { unsigned if_opcode; glsl_to_tgsi_instruction *if_inst; ir->condition->accept(this); assert(this->result.file != PROGRAM_UNDEFINED); if_opcode = native_integers ? TGSI_OPCODE_UIF : TGSI_OPCODE_IF; if_inst = emit(ir->condition, if_opcode, undef_dst, this->result); this->instructions.push_tail(if_inst); visit_exec_list(&ir->then_instructions, this); if (!ir->else_instructions.is_empty()) { emit(ir->condition, TGSI_OPCODE_ELSE); visit_exec_list(&ir->else_instructions, this); } if_inst = emit(ir->condition, TGSI_OPCODE_ENDIF); } void glsl_to_tgsi_visitor::visit(ir_emit_vertex *ir) { assert(this->prog->Target == GL_GEOMETRY_PROGRAM_NV); emit(ir, TGSI_OPCODE_EMIT); } void glsl_to_tgsi_visitor::visit(ir_end_primitive *ir) { assert(this->prog->Target == GL_GEOMETRY_PROGRAM_NV); emit(ir, TGSI_OPCODE_ENDPRIM); } glsl_to_tgsi_visitor::glsl_to_tgsi_visitor() { result.file = PROGRAM_UNDEFINED; next_temp = 1; next_array = 0; next_signature_id = 1; num_immediates = 0; current_function = NULL; num_address_regs = 0; samplers_used = 0; indirect_addr_consts = false; glsl_version = 0; native_integers = false; mem_ctx = ralloc_context(NULL); ctx = NULL; prog = NULL; shader_program = NULL; options = NULL; } glsl_to_tgsi_visitor::~glsl_to_tgsi_visitor() { ralloc_free(mem_ctx); } extern "C" void free_glsl_to_tgsi_visitor(glsl_to_tgsi_visitor *v) { delete v; } /** * Count resources used by the given gpu program (number of texture * samplers, etc). */ static void count_resources(glsl_to_tgsi_visitor *v, gl_program *prog) { v->samplers_used = 0; foreach_iter(exec_list_iterator, iter, v->instructions) { glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get(); if (is_tex_instruction(inst->op)) { v->samplers_used |= 1 << inst->sampler; if (inst->tex_shadow) { prog->ShadowSamplers |= 1 << inst->sampler; } } } prog->SamplersUsed = v->samplers_used; if (v->shader_program != NULL) _mesa_update_shader_textures_used(v->shader_program, prog); } static void set_uniform_initializer(struct gl_context *ctx, void *mem_ctx, struct gl_shader_program *shader_program, const char *name, const glsl_type *type, ir_constant *val) { if (type->is_record()) { ir_constant *field_constant; field_constant = (ir_constant *)val->components.get_head(); for (unsigned int i = 0; i < type->length; i++) { const glsl_type *field_type = type->fields.structure[i].type; const char *field_name = ralloc_asprintf(mem_ctx, "%s.%s", name, type->fields.structure[i].name); set_uniform_initializer(ctx, mem_ctx, shader_program, field_name, field_type, field_constant); field_constant = (ir_constant *)field_constant->next; } return; } unsigned offset; unsigned index = _mesa_get_uniform_location(ctx, shader_program, name, &offset); if (offset == GL_INVALID_INDEX) { fail_link(shader_program, "Couldn't find uniform for initializer %s\n", name); return; } int loc = _mesa_uniform_merge_location_offset(shader_program, index, offset); for (unsigned int i = 0; i < (type->is_array() ? type->length : 1); i++) { ir_constant *element; const glsl_type *element_type; if (type->is_array()) { element = val->array_elements[i]; element_type = type->fields.array; } else { element = val; element_type = type; } void *values; if (element_type->base_type == GLSL_TYPE_BOOL) { int *conv = ralloc_array(mem_ctx, int, element_type->components()); for (unsigned int j = 0; j < element_type->components(); j++) { conv[j] = element->value.b[j]; } values = (void *)conv; element_type = glsl_type::get_instance(GLSL_TYPE_INT, element_type->vector_elements, 1); } else { values = &element->value; } if (element_type->is_matrix()) { _mesa_uniform_matrix(ctx, shader_program, element_type->matrix_columns, element_type->vector_elements, loc, 1, GL_FALSE, (GLfloat *)values); } else { _mesa_uniform(ctx, shader_program, loc, element_type->matrix_columns, values, element_type->gl_type); } loc++; } } /** * Returns the mask of channels (bitmask of WRITEMASK_X,Y,Z,W) which * are read from the given src in this instruction */ static int get_src_arg_mask(st_dst_reg dst, st_src_reg src) { int read_mask = 0, comp; /* Now, given the src swizzle and the written channels, find which * components are actually read */ for (comp = 0; comp < 4; ++comp) { const unsigned coord = GET_SWZ(src.swizzle, comp); ASSERT(coord < 4); if (dst.writemask & (1 << comp) && coord <= SWIZZLE_W) read_mask |= 1 << coord; } return read_mask; } /** * This pass replaces CMP T0, T1 T2 T0 with MOV T0, T2 when the CMP * instruction is the first instruction to write to register T0. There are * several lowering passes done in GLSL IR (e.g. branches and * relative addressing) that create a large number of conditional assignments * that ir_to_mesa converts to CMP instructions like the one mentioned above. * * Here is why this conversion is safe: * CMP T0, T1 T2 T0 can be expanded to: * if (T1 < 0.0) * MOV T0, T2; * else * MOV T0, T0; * * If (T1 < 0.0) evaluates to true then our replacement MOV T0, T2 is the same * as the original program. If (T1 < 0.0) evaluates to false, executing * MOV T0, T0 will store a garbage value in T0 since T0 is uninitialized. * Therefore, it doesn't matter that we are replacing MOV T0, T0 with MOV T0, T2 * because any instruction that was going to read from T0 after this was going * to read a garbage value anyway. */ void glsl_to_tgsi_visitor::simplify_cmp(void) { unsigned *tempWrites; unsigned outputWrites[MAX_PROGRAM_OUTPUTS]; tempWrites = new unsigned[MAX_TEMPS]; if (!tempWrites) { return; } memset(tempWrites, 0, sizeof(unsigned) * MAX_TEMPS); memset(outputWrites, 0, sizeof(outputWrites)); foreach_iter(exec_list_iterator, iter, this->instructions) { glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get(); unsigned prevWriteMask = 0; /* Give up if we encounter relative addressing or flow control. */ if (inst->dst.reladdr || tgsi_get_opcode_info(inst->op)->is_branch || inst->op == TGSI_OPCODE_BGNSUB || inst->op == TGSI_OPCODE_CONT || inst->op == TGSI_OPCODE_END || inst->op == TGSI_OPCODE_ENDSUB || inst->op == TGSI_OPCODE_RET) { break; } if (inst->dst.file == PROGRAM_OUTPUT) { assert(inst->dst.index < MAX_PROGRAM_OUTPUTS); prevWriteMask = outputWrites[inst->dst.index]; outputWrites[inst->dst.index] |= inst->dst.writemask; } else if (inst->dst.file == PROGRAM_TEMPORARY) { assert(inst->dst.index < MAX_TEMPS); prevWriteMask = tempWrites[inst->dst.index]; tempWrites[inst->dst.index] |= inst->dst.writemask; } else continue; /* For a CMP to be considered a conditional write, the destination * register and source register two must be the same. */ if (inst->op == TGSI_OPCODE_CMP && !(inst->dst.writemask & prevWriteMask) && inst->src[2].file == inst->dst.file && inst->src[2].index == inst->dst.index && inst->dst.writemask == get_src_arg_mask(inst->dst, inst->src[2])) { inst->op = TGSI_OPCODE_MOV; inst->src[0] = inst->src[1]; } } delete [] tempWrites; } /* Replaces all references to a temporary register index with another index. */ void glsl_to_tgsi_visitor::rename_temp_register(int index, int new_index) { foreach_iter(exec_list_iterator, iter, this->instructions) { glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get(); unsigned j; for (j=0; j < num_inst_src_regs(inst->op); j++) { if (inst->src[j].file == PROGRAM_TEMPORARY && inst->src[j].index == index) { inst->src[j].index = new_index; } } if (inst->dst.file == PROGRAM_TEMPORARY && inst->dst.index == index) { inst->dst.index = new_index; } } } int glsl_to_tgsi_visitor::get_first_temp_read(int index) { int depth = 0; /* loop depth */ int loop_start = -1; /* index of the first active BGNLOOP (if any) */ unsigned i = 0, j; foreach_iter(exec_list_iterator, iter, this->instructions) { glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get(); for (j=0; j < num_inst_src_regs(inst->op); j++) { if (inst->src[j].file == PROGRAM_TEMPORARY && inst->src[j].index == index) { return (depth == 0) ? i : loop_start; } } if (inst->op == TGSI_OPCODE_BGNLOOP) { if(depth++ == 0) loop_start = i; } else if (inst->op == TGSI_OPCODE_ENDLOOP) { if (--depth == 0) loop_start = -1; } assert(depth >= 0); i++; } return -1; } int glsl_to_tgsi_visitor::get_first_temp_write(int index) { int depth = 0; /* loop depth */ int loop_start = -1; /* index of the first active BGNLOOP (if any) */ int i = 0; foreach_iter(exec_list_iterator, iter, this->instructions) { glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get(); if (inst->dst.file == PROGRAM_TEMPORARY && inst->dst.index == index) { return (depth == 0) ? i : loop_start; } if (inst->op == TGSI_OPCODE_BGNLOOP) { if(depth++ == 0) loop_start = i; } else if (inst->op == TGSI_OPCODE_ENDLOOP) { if (--depth == 0) loop_start = -1; } assert(depth >= 0); i++; } return -1; } int glsl_to_tgsi_visitor::get_last_temp_read(int index) { int depth = 0; /* loop depth */ int last = -1; /* index of last instruction that reads the temporary */ unsigned i = 0, j; foreach_iter(exec_list_iterator, iter, this->instructions) { glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get(); for (j=0; j < num_inst_src_regs(inst->op); j++) { if (inst->src[j].file == PROGRAM_TEMPORARY && inst->src[j].index == index) { last = (depth == 0) ? i : -2; } } if (inst->op == TGSI_OPCODE_BGNLOOP) depth++; else if (inst->op == TGSI_OPCODE_ENDLOOP) if (--depth == 0 && last == -2) last = i; assert(depth >= 0); i++; } assert(last >= -1); return last; } int glsl_to_tgsi_visitor::get_last_temp_write(int index) { int depth = 0; /* loop depth */ int last = -1; /* index of last instruction that writes to the temporary */ int i = 0; foreach_iter(exec_list_iterator, iter, this->instructions) { glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get(); if (inst->dst.file == PROGRAM_TEMPORARY && inst->dst.index == index) last = (depth == 0) ? i : -2; if (inst->op == TGSI_OPCODE_BGNLOOP) depth++; else if (inst->op == TGSI_OPCODE_ENDLOOP) if (--depth == 0 && last == -2) last = i; assert(depth >= 0); i++; } assert(last >= -1); return last; } /* * On a basic block basis, tracks available PROGRAM_TEMPORARY register * channels for copy propagation and updates following instructions to * use the original versions. * * The glsl_to_tgsi_visitor lazily produces code assuming that this pass * will occur. As an example, a TXP production before this pass: * * 0: MOV TEMP[1], INPUT[4].xyyy; * 1: MOV TEMP[1].w, INPUT[4].wwww; * 2: TXP TEMP[2], TEMP[1], texture[0], 2D; * * and after: * * 0: MOV TEMP[1], INPUT[4].xyyy; * 1: MOV TEMP[1].w, INPUT[4].wwww; * 2: TXP TEMP[2], INPUT[4].xyyw, texture[0], 2D; * * which allows for dead code elimination on TEMP[1]'s writes. */ void glsl_to_tgsi_visitor::copy_propagate(void) { glsl_to_tgsi_instruction **acp = rzalloc_array(mem_ctx, glsl_to_tgsi_instruction *, this->next_temp * 4); int *acp_level = rzalloc_array(mem_ctx, int, this->next_temp * 4); int level = 0; foreach_iter(exec_list_iterator, iter, this->instructions) { glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get(); assert(inst->dst.file != PROGRAM_TEMPORARY || inst->dst.index < this->next_temp); /* First, do any copy propagation possible into the src regs. */ for (int r = 0; r < 3; r++) { glsl_to_tgsi_instruction *first = NULL; bool good = true; int acp_base = inst->src[r].index * 4; if (inst->src[r].file != PROGRAM_TEMPORARY || inst->src[r].reladdr || inst->src[r].reladdr2) continue; /* See if we can find entries in the ACP consisting of MOVs * from the same src register for all the swizzled channels * of this src register reference. */ for (int i = 0; i < 4; i++) { int src_chan = GET_SWZ(inst->src[r].swizzle, i); glsl_to_tgsi_instruction *copy_chan = acp[acp_base + src_chan]; if (!copy_chan) { good = false; break; } assert(acp_level[acp_base + src_chan] <= level); if (!first) { first = copy_chan; } else { if (first->src[0].file != copy_chan->src[0].file || first->src[0].index != copy_chan->src[0].index) { good = false; break; } } } if (good) { /* We've now validated that we can copy-propagate to * replace this src register reference. Do it. */ inst->src[r].file = first->src[0].file; inst->src[r].index = first->src[0].index; inst->src[r].index2D = first->src[0].index2D; inst->src[r].has_index2 = first->src[0].has_index2; int swizzle = 0; for (int i = 0; i < 4; i++) { int src_chan = GET_SWZ(inst->src[r].swizzle, i); glsl_to_tgsi_instruction *copy_inst = acp[acp_base + src_chan]; swizzle |= (GET_SWZ(copy_inst->src[0].swizzle, src_chan) << (3 * i)); } inst->src[r].swizzle = swizzle; } } switch (inst->op) { case TGSI_OPCODE_BGNLOOP: case TGSI_OPCODE_ENDLOOP: /* End of a basic block, clear the ACP entirely. */ memset(acp, 0, sizeof(*acp) * this->next_temp * 4); break; case TGSI_OPCODE_IF: case TGSI_OPCODE_UIF: ++level; break; case TGSI_OPCODE_ENDIF: case TGSI_OPCODE_ELSE: /* Clear all channels written inside the block from the ACP, but * leaving those that were not touched. */ for (int r = 0; r < this->next_temp; r++) { for (int c = 0; c < 4; c++) { if (!acp[4 * r + c]) continue; if (acp_level[4 * r + c] >= level) acp[4 * r + c] = NULL; } } if (inst->op == TGSI_OPCODE_ENDIF) --level; break; default: /* Continuing the block, clear any written channels from * the ACP. */ if (inst->dst.file == PROGRAM_TEMPORARY && inst->dst.reladdr) { /* Any temporary might be written, so no copy propagation * across this instruction. */ memset(acp, 0, sizeof(*acp) * this->next_temp * 4); } else if (inst->dst.file == PROGRAM_OUTPUT && inst->dst.reladdr) { /* Any output might be written, so no copy propagation * from outputs across this instruction. */ for (int r = 0; r < this->next_temp; r++) { for (int c = 0; c < 4; c++) { if (!acp[4 * r + c]) continue; if (acp[4 * r + c]->src[0].file == PROGRAM_OUTPUT) acp[4 * r + c] = NULL; } } } else if (inst->dst.file == PROGRAM_TEMPORARY || inst->dst.file == PROGRAM_OUTPUT) { /* Clear where it's used as dst. */ if (inst->dst.file == PROGRAM_TEMPORARY) { for (int c = 0; c < 4; c++) { if (inst->dst.writemask & (1 << c)) { acp[4 * inst->dst.index + c] = NULL; } } } /* Clear where it's used as src. */ for (int r = 0; r < this->next_temp; r++) { for (int c = 0; c < 4; c++) { if (!acp[4 * r + c]) continue; int src_chan = GET_SWZ(acp[4 * r + c]->src[0].swizzle, c); if (acp[4 * r + c]->src[0].file == inst->dst.file && acp[4 * r + c]->src[0].index == inst->dst.index && inst->dst.writemask & (1 << src_chan)) { acp[4 * r + c] = NULL; } } } } break; } /* If this is a copy, add it to the ACP. */ if (inst->op == TGSI_OPCODE_MOV && inst->dst.file == PROGRAM_TEMPORARY && !(inst->dst.file == inst->src[0].file && inst->dst.index == inst->src[0].index) && !inst->dst.reladdr && !inst->saturate && !inst->src[0].reladdr && !inst->src[0].reladdr2 && !inst->src[0].negate) { for (int i = 0; i < 4; i++) { if (inst->dst.writemask & (1 << i)) { acp[4 * inst->dst.index + i] = inst; acp_level[4 * inst->dst.index + i] = level; } } } } ralloc_free(acp_level); ralloc_free(acp); } /* * Tracks available PROGRAM_TEMPORARY registers for dead code elimination. * * The glsl_to_tgsi_visitor lazily produces code assuming that this pass * will occur. As an example, a TXP production after copy propagation but * before this pass: * * 0: MOV TEMP[1], INPUT[4].xyyy; * 1: MOV TEMP[1].w, INPUT[4].wwww; * 2: TXP TEMP[2], INPUT[4].xyyw, texture[0], 2D; * * and after this pass: * * 0: TXP TEMP[2], INPUT[4].xyyw, texture[0], 2D; * * FIXME: assumes that all functions are inlined (no support for BGNSUB/ENDSUB) * FIXME: doesn't eliminate all dead code inside of loops; it steps around them */ void glsl_to_tgsi_visitor::eliminate_dead_code(void) { int i; for (i=0; i < this->next_temp; i++) { int last_read = get_last_temp_read(i); int j = 0; foreach_iter(exec_list_iterator, iter, this->instructions) { glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get(); if (inst->dst.file == PROGRAM_TEMPORARY && inst->dst.index == i && j > last_read) { iter.remove(); delete inst; } j++; } } } /* * On a basic block basis, tracks available PROGRAM_TEMPORARY registers for dead * code elimination. This is less primitive than eliminate_dead_code(), as it * is per-channel and can detect consecutive writes without a read between them * as dead code. However, there is some dead code that can be eliminated by * eliminate_dead_code() but not this function - for example, this function * cannot eliminate an instruction writing to a register that is never read and * is the only instruction writing to that register. * * The glsl_to_tgsi_visitor lazily produces code assuming that this pass * will occur. */ int glsl_to_tgsi_visitor::eliminate_dead_code_advanced(void) { glsl_to_tgsi_instruction **writes = rzalloc_array(mem_ctx, glsl_to_tgsi_instruction *, this->next_temp * 4); int *write_level = rzalloc_array(mem_ctx, int, this->next_temp * 4); int level = 0; int removed = 0; foreach_iter(exec_list_iterator, iter, this->instructions) { glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get(); assert(inst->dst.file != PROGRAM_TEMPORARY || inst->dst.index < this->next_temp); switch (inst->op) { case TGSI_OPCODE_BGNLOOP: case TGSI_OPCODE_ENDLOOP: case TGSI_OPCODE_CONT: case TGSI_OPCODE_BRK: /* End of a basic block, clear the write array entirely. * * This keeps us from killing dead code when the writes are * on either side of a loop, even when the register isn't touched * inside the loop. However, glsl_to_tgsi_visitor doesn't seem to emit * dead code of this type, so it shouldn't make a difference as long as * the dead code elimination pass in the GLSL compiler does its job. */ memset(writes, 0, sizeof(*writes) * this->next_temp * 4); break; case TGSI_OPCODE_ENDIF: case TGSI_OPCODE_ELSE: /* Promote the recorded level of all channels written inside the * preceding if or else block to the level above the if/else block. */ for (int r = 0; r < this->next_temp; r++) { for (int c = 0; c < 4; c++) { if (!writes[4 * r + c]) continue; if (write_level[4 * r + c] == level) write_level[4 * r + c] = level-1; } } if(inst->op == TGSI_OPCODE_ENDIF) --level; break; case TGSI_OPCODE_IF: case TGSI_OPCODE_UIF: ++level; /* fallthrough to default case to mark the condition as read */ default: /* Continuing the block, clear any channels from the write array that * are read by this instruction. */ for (unsigned i = 0; i < Elements(inst->src); i++) { if (inst->src[i].file == PROGRAM_TEMPORARY && inst->src[i].reladdr){ /* Any temporary might be read, so no dead code elimination * across this instruction. */ memset(writes, 0, sizeof(*writes) * this->next_temp * 4); } else if (inst->src[i].file == PROGRAM_TEMPORARY) { /* Clear where it's used as src. */ int src_chans = 1 << GET_SWZ(inst->src[i].swizzle, 0); src_chans |= 1 << GET_SWZ(inst->src[i].swizzle, 1); src_chans |= 1 << GET_SWZ(inst->src[i].swizzle, 2); src_chans |= 1 << GET_SWZ(inst->src[i].swizzle, 3); for (int c = 0; c < 4; c++) { if (src_chans & (1 << c)) { writes[4 * inst->src[i].index + c] = NULL; } } } } break; } /* If this instruction writes to a temporary, add it to the write array. * If there is already an instruction in the write array for one or more * of the channels, flag that channel write as dead. */ if (inst->dst.file == PROGRAM_TEMPORARY && !inst->dst.reladdr && !inst->saturate) { for (int c = 0; c < 4; c++) { if (inst->dst.writemask & (1 << c)) { if (writes[4 * inst->dst.index + c]) { if (write_level[4 * inst->dst.index + c] < level) continue; else writes[4 * inst->dst.index + c]->dead_mask |= (1 << c); } writes[4 * inst->dst.index + c] = inst; write_level[4 * inst->dst.index + c] = level; } } } } /* Anything still in the write array at this point is dead code. */ for (int r = 0; r < this->next_temp; r++) { for (int c = 0; c < 4; c++) { glsl_to_tgsi_instruction *inst = writes[4 * r + c]; if (inst) inst->dead_mask |= (1 << c); } } /* Now actually remove the instructions that are completely dead and update * the writemask of other instructions with dead channels. */ foreach_iter(exec_list_iterator, iter, this->instructions) { glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get(); if (!inst->dead_mask || !inst->dst.writemask) continue; else if ((inst->dst.writemask & ~inst->dead_mask) == 0) { iter.remove(); delete inst; removed++; } else inst->dst.writemask &= ~(inst->dead_mask); } ralloc_free(write_level); ralloc_free(writes); return removed; } /* Merges temporary registers together where possible to reduce the number of * registers needed to run a program. * * Produces optimal code only after copy propagation and dead code elimination * have been run. */ void glsl_to_tgsi_visitor::merge_registers(void) { int *last_reads = rzalloc_array(mem_ctx, int, this->next_temp); int *first_writes = rzalloc_array(mem_ctx, int, this->next_temp); int i, j; /* Read the indices of the last read and first write to each temp register * into an array so that we don't have to traverse the instruction list as * much. */ for (i=0; i < this->next_temp; i++) { last_reads[i] = get_last_temp_read(i); first_writes[i] = get_first_temp_write(i); } /* Start looking for registers with non-overlapping usages that can be * merged together. */ for (i=0; i < this->next_temp; i++) { /* Don't touch unused registers. */ if (last_reads[i] < 0 || first_writes[i] < 0) continue; for (j=0; j < this->next_temp; j++) { /* Don't touch unused registers. */ if (last_reads[j] < 0 || first_writes[j] < 0) continue; /* We can merge the two registers if the first write to j is after or * in the same instruction as the last read from i. Note that the * register at index i will always be used earlier or at the same time * as the register at index j. */ if (first_writes[i] <= first_writes[j] && last_reads[i] <= first_writes[j]) { rename_temp_register(j, i); /* Replace all references to j with i.*/ /* Update the first_writes and last_reads arrays with the new * values for the merged register index, and mark the newly unused * register index as such. */ last_reads[i] = last_reads[j]; first_writes[j] = -1; last_reads[j] = -1; } } } ralloc_free(last_reads); ralloc_free(first_writes); } /* Reassign indices to temporary registers by reusing unused indices created * by optimization passes. */ void glsl_to_tgsi_visitor::renumber_registers(void) { int i = 0; int new_index = 0; for (i=0; i < this->next_temp; i++) { if (get_first_temp_read(i) < 0) continue; if (i != new_index) rename_temp_register(i, new_index); new_index++; } this->next_temp = new_index; } /** * Returns a fragment program which implements the current pixel transfer ops. * Based on get_pixel_transfer_program in st_atom_pixeltransfer.c. */ extern "C" void get_pixel_transfer_visitor(struct st_fragment_program *fp, glsl_to_tgsi_visitor *original, int scale_and_bias, int pixel_maps) { glsl_to_tgsi_visitor *v = new glsl_to_tgsi_visitor(); struct st_context *st = st_context(original->ctx); struct gl_program *prog = &fp->Base.Base; struct gl_program_parameter_list *params = _mesa_new_parameter_list(); st_src_reg coord, src0; st_dst_reg dst0; glsl_to_tgsi_instruction *inst; /* Copy attributes of the glsl_to_tgsi_visitor in the original shader. */ v->ctx = original->ctx; v->prog = prog; v->shader_program = NULL; v->glsl_version = original->glsl_version; v->native_integers = original->native_integers; v->options = original->options; v->next_temp = original->next_temp; v->num_address_regs = original->num_address_regs; v->samplers_used = prog->SamplersUsed = original->samplers_used; v->indirect_addr_consts = original->indirect_addr_consts; memcpy(&v->immediates, &original->immediates, sizeof(v->immediates)); v->num_immediates = original->num_immediates; /* * Get initial pixel color from the texture. * TEX colorTemp, fragment.texcoord[0], texture[0], 2D; */ coord = st_src_reg(PROGRAM_INPUT, VARYING_SLOT_TEX0, glsl_type::vec2_type); src0 = v->get_temp(glsl_type::vec4_type); dst0 = st_dst_reg(src0); inst = v->emit(NULL, TGSI_OPCODE_TEX, dst0, coord); inst->sampler = 0; inst->tex_target = TEXTURE_2D_INDEX; prog->InputsRead |= VARYING_BIT_TEX0; prog->SamplersUsed |= (1 << 0); /* mark sampler 0 as used */ v->samplers_used |= (1 << 0); if (scale_and_bias) { static const gl_state_index scale_state[STATE_LENGTH] = { STATE_INTERNAL, STATE_PT_SCALE, (gl_state_index) 0, (gl_state_index) 0, (gl_state_index) 0 }; static const gl_state_index bias_state[STATE_LENGTH] = { STATE_INTERNAL, STATE_PT_BIAS, (gl_state_index) 0, (gl_state_index) 0, (gl_state_index) 0 }; GLint scale_p, bias_p; st_src_reg scale, bias; scale_p = _mesa_add_state_reference(params, scale_state); bias_p = _mesa_add_state_reference(params, bias_state); /* MAD colorTemp, colorTemp, scale, bias; */ scale = st_src_reg(PROGRAM_STATE_VAR, scale_p, GLSL_TYPE_FLOAT); bias = st_src_reg(PROGRAM_STATE_VAR, bias_p, GLSL_TYPE_FLOAT); inst = v->emit(NULL, TGSI_OPCODE_MAD, dst0, src0, scale, bias); } if (pixel_maps) { st_src_reg temp = v->get_temp(glsl_type::vec4_type); st_dst_reg temp_dst = st_dst_reg(temp); assert(st->pixel_xfer.pixelmap_texture); /* With a little effort, we can do four pixel map look-ups with * two TEX instructions: */ /* TEX temp.rg, colorTemp.rgba, texture[1], 2D; */ temp_dst.writemask = WRITEMASK_XY; /* write R,G */ inst = v->emit(NULL, TGSI_OPCODE_TEX, temp_dst, src0); inst->sampler = 1; inst->tex_target = TEXTURE_2D_INDEX; /* TEX temp.ba, colorTemp.baba, texture[1], 2D; */ src0.swizzle = MAKE_SWIZZLE4(SWIZZLE_Z, SWIZZLE_W, SWIZZLE_Z, SWIZZLE_W); temp_dst.writemask = WRITEMASK_ZW; /* write B,A */ inst = v->emit(NULL, TGSI_OPCODE_TEX, temp_dst, src0); inst->sampler = 1; inst->tex_target = TEXTURE_2D_INDEX; prog->SamplersUsed |= (1 << 1); /* mark sampler 1 as used */ v->samplers_used |= (1 << 1); /* MOV colorTemp, temp; */ inst = v->emit(NULL, TGSI_OPCODE_MOV, dst0, temp); } /* Now copy the instructions from the original glsl_to_tgsi_visitor into the * new visitor. */ foreach_iter(exec_list_iterator, iter, original->instructions) { glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get(); glsl_to_tgsi_instruction *newinst; st_src_reg src_regs[3]; if (inst->dst.file == PROGRAM_OUTPUT) prog->OutputsWritten |= BITFIELD64_BIT(inst->dst.index); for (int i=0; i<3; i++) { src_regs[i] = inst->src[i]; if (src_regs[i].file == PROGRAM_INPUT && src_regs[i].index == VARYING_SLOT_COL0) { src_regs[i].file = PROGRAM_TEMPORARY; src_regs[i].index = src0.index; } else if (src_regs[i].file == PROGRAM_INPUT) prog->InputsRead |= BITFIELD64_BIT(src_regs[i].index); } newinst = v->emit(NULL, inst->op, inst->dst, src_regs[0], src_regs[1], src_regs[2]); newinst->tex_target = inst->tex_target; } /* Make modifications to fragment program info. */ prog->Parameters = _mesa_combine_parameter_lists(params, original->prog->Parameters); _mesa_free_parameter_list(params); count_resources(v, prog); fp->glsl_to_tgsi = v; } /** * Make fragment program for glBitmap: * Sample the texture and kill the fragment if the bit is 0. * This program will be combined with the user's fragment program. * * Based on make_bitmap_fragment_program in st_cb_bitmap.c. */ extern "C" void get_bitmap_visitor(struct st_fragment_program *fp, glsl_to_tgsi_visitor *original, int samplerIndex) { glsl_to_tgsi_visitor *v = new glsl_to_tgsi_visitor(); struct st_context *st = st_context(original->ctx); struct gl_program *prog = &fp->Base.Base; st_src_reg coord, src0; st_dst_reg dst0; glsl_to_tgsi_instruction *inst; /* Copy attributes of the glsl_to_tgsi_visitor in the original shader. */ v->ctx = original->ctx; v->prog = prog; v->shader_program = NULL; v->glsl_version = original->glsl_version; v->native_integers = original->native_integers; v->options = original->options; v->next_temp = original->next_temp; v->num_address_regs = original->num_address_regs; v->samplers_used = prog->SamplersUsed = original->samplers_used; v->indirect_addr_consts = original->indirect_addr_consts; memcpy(&v->immediates, &original->immediates, sizeof(v->immediates)); v->num_immediates = original->num_immediates; /* TEX tmp0, fragment.texcoord[0], texture[0], 2D; */ coord = st_src_reg(PROGRAM_INPUT, VARYING_SLOT_TEX0, glsl_type::vec2_type); src0 = v->get_temp(glsl_type::vec4_type); dst0 = st_dst_reg(src0); inst = v->emit(NULL, TGSI_OPCODE_TEX, dst0, coord); inst->sampler = samplerIndex; inst->tex_target = TEXTURE_2D_INDEX; prog->InputsRead |= VARYING_BIT_TEX0; prog->SamplersUsed |= (1 << samplerIndex); /* mark sampler as used */ v->samplers_used |= (1 << samplerIndex); /* KIL if -tmp0 < 0 # texel=0 -> keep / texel=0 -> discard */ src0.negate = NEGATE_XYZW; if (st->bitmap.tex_format == PIPE_FORMAT_L8_UNORM) src0.swizzle = SWIZZLE_XXXX; inst = v->emit(NULL, TGSI_OPCODE_KILL_IF, undef_dst, src0); /* Now copy the instructions from the original glsl_to_tgsi_visitor into the * new visitor. */ foreach_iter(exec_list_iterator, iter, original->instructions) { glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get(); glsl_to_tgsi_instruction *newinst; st_src_reg src_regs[3]; if (inst->dst.file == PROGRAM_OUTPUT) prog->OutputsWritten |= BITFIELD64_BIT(inst->dst.index); for (int i=0; i<3; i++) { src_regs[i] = inst->src[i]; if (src_regs[i].file == PROGRAM_INPUT) prog->InputsRead |= BITFIELD64_BIT(src_regs[i].index); } newinst = v->emit(NULL, inst->op, inst->dst, src_regs[0], src_regs[1], src_regs[2]); newinst->tex_target = inst->tex_target; } /* Make modifications to fragment program info. */ prog->Parameters = _mesa_clone_parameter_list(original->prog->Parameters); count_resources(v, prog); fp->glsl_to_tgsi = v; } /* ------------------------- TGSI conversion stuff -------------------------- */ struct label { unsigned branch_target; unsigned token; }; /** * Intermediate state used during shader translation. */ struct st_translate { struct ureg_program *ureg; struct ureg_dst temps[MAX_TEMPS]; struct ureg_dst arrays[MAX_ARRAYS]; struct ureg_src *constants; struct ureg_src *immediates; struct ureg_dst outputs[PIPE_MAX_SHADER_OUTPUTS]; struct ureg_src inputs[PIPE_MAX_SHADER_INPUTS]; struct ureg_dst address[2]; struct ureg_src samplers[PIPE_MAX_SAMPLERS]; struct ureg_src systemValues[SYSTEM_VALUE_MAX]; unsigned array_sizes[MAX_ARRAYS]; const GLuint *inputMapping; const GLuint *outputMapping; /* For every instruction that contains a label (eg CALL), keep * details so that we can go back afterwards and emit the correct * tgsi instruction number for each label. */ struct label *labels; unsigned labels_size; unsigned labels_count; /* Keep a record of the tgsi instruction number that each mesa * instruction starts at, will be used to fix up labels after * translation. */ unsigned *insn; unsigned insn_size; unsigned insn_count; unsigned procType; /**< TGSI_PROCESSOR_VERTEX/FRAGMENT */ boolean error; }; /** Map Mesa's SYSTEM_VALUE_x to TGSI_SEMANTIC_x */ static unsigned mesa_sysval_to_semantic[SYSTEM_VALUE_MAX] = { TGSI_SEMANTIC_FACE, TGSI_SEMANTIC_VERTEXID, TGSI_SEMANTIC_INSTANCEID }; /** * Make note of a branch to a label in the TGSI code. * After we've emitted all instructions, we'll go over the list * of labels built here and patch the TGSI code with the actual * location of each label. */ static unsigned *get_label(struct st_translate *t, unsigned branch_target) { unsigned i; if (t->labels_count + 1 >= t->labels_size) { t->labels_size = 1 << (util_logbase2(t->labels_size) + 1); t->labels = (struct label *)realloc(t->labels, t->labels_size * sizeof(struct label)); if (t->labels == NULL) { static unsigned dummy; t->error = TRUE; return &dummy; } } i = t->labels_count++; t->labels[i].branch_target = branch_target; return &t->labels[i].token; } /** * Called prior to emitting the TGSI code for each instruction. * Allocate additional space for instructions if needed. * Update the insn[] array so the next glsl_to_tgsi_instruction points to * the next TGSI instruction. */ static void set_insn_start(struct st_translate *t, unsigned start) { if (t->insn_count + 1 >= t->insn_size) { t->insn_size = 1 << (util_logbase2(t->insn_size) + 1); t->insn = (unsigned *)realloc(t->insn, t->insn_size * sizeof(t->insn[0])); if (t->insn == NULL) { t->error = TRUE; return; } } t->insn[t->insn_count++] = start; } /** * Map a glsl_to_tgsi constant/immediate to a TGSI immediate. */ static struct ureg_src emit_immediate(struct st_translate *t, gl_constant_value values[4], int type, int size) { struct ureg_program *ureg = t->ureg; switch(type) { case GL_FLOAT: return ureg_DECL_immediate(ureg, &values[0].f, size); case GL_INT: return ureg_DECL_immediate_int(ureg, &values[0].i, size); case GL_UNSIGNED_INT: case GL_BOOL: return ureg_DECL_immediate_uint(ureg, &values[0].u, size); default: assert(!"should not get here - type must be float, int, uint, or bool"); return ureg_src_undef(); } } /** * Map a glsl_to_tgsi dst register to a TGSI ureg_dst register. */ static struct ureg_dst dst_register(struct st_translate *t, gl_register_file file, GLuint index) { unsigned array; switch(file) { case PROGRAM_UNDEFINED: return ureg_dst_undef(); case PROGRAM_TEMPORARY: assert(index >= 0); assert(index < (int) Elements(t->temps)); if (ureg_dst_is_undef(t->temps[index])) t->temps[index] = ureg_DECL_local_temporary(t->ureg); return t->temps[index]; case PROGRAM_ARRAY: array = index >> 16; assert(array >= 0); assert(array < (int) Elements(t->arrays)); if (ureg_dst_is_undef(t->arrays[array])) t->arrays[array] = ureg_DECL_array_temporary( t->ureg, t->array_sizes[array], TRUE); return ureg_dst_array_offset(t->arrays[array], (int)(index & 0xFFFF) - 0x8000); case PROGRAM_OUTPUT: if (t->procType == TGSI_PROCESSOR_VERTEX) assert(index < VARYING_SLOT_MAX); else if (t->procType == TGSI_PROCESSOR_FRAGMENT) assert(index < FRAG_RESULT_MAX); else assert(index < VARYING_SLOT_MAX); assert(t->outputMapping[index] < Elements(t->outputs)); return t->outputs[t->outputMapping[index]]; case PROGRAM_ADDRESS: return t->address[index]; default: assert(!"unknown dst register file"); return ureg_dst_undef(); } } /** * Map a glsl_to_tgsi src register to a TGSI ureg_src register. */ static struct ureg_src src_register(struct st_translate *t, gl_register_file file, GLint index, GLint index2D) { switch(file) { case PROGRAM_UNDEFINED: return ureg_src_undef(); case PROGRAM_TEMPORARY: case PROGRAM_ARRAY: return ureg_src(dst_register(t, file, index)); case PROGRAM_ENV_PARAM: case PROGRAM_LOCAL_PARAM: case PROGRAM_UNIFORM: assert(index >= 0); return t->constants[index]; case PROGRAM_STATE_VAR: case PROGRAM_CONSTANT: /* ie, immediate */ if (index2D) { struct ureg_src src; src = ureg_src_register(TGSI_FILE_CONSTANT, 0); src.Dimension = 1; src.DimensionIndex = index2D; return src; } else if (index < 0) return ureg_DECL_constant(t->ureg, 0); else return t->constants[index]; case PROGRAM_IMMEDIATE: return t->immediates[index]; case PROGRAM_INPUT: assert(t->inputMapping[index] < Elements(t->inputs)); return t->inputs[t->inputMapping[index]]; case PROGRAM_OUTPUT: assert(t->outputMapping[index] < Elements(t->outputs)); return ureg_src(t->outputs[t->outputMapping[index]]); /* not needed? */ case PROGRAM_ADDRESS: return ureg_src(t->address[index]); case PROGRAM_SYSTEM_VALUE: assert(index < (int) Elements(t->systemValues)); return t->systemValues[index]; default: assert(!"unknown src register file"); return ureg_src_undef(); } } /** * Create a TGSI ureg_dst register from an st_dst_reg. */ static struct ureg_dst translate_dst(struct st_translate *t, const st_dst_reg *dst_reg, bool saturate, bool clamp_color) { struct ureg_dst dst = dst_register(t, dst_reg->file, dst_reg->index); dst = ureg_writemask(dst, dst_reg->writemask); if (saturate) dst = ureg_saturate(dst); else if (clamp_color && dst_reg->file == PROGRAM_OUTPUT) { /* Clamp colors for ARB_color_buffer_float. */ switch (t->procType) { case TGSI_PROCESSOR_VERTEX: /* XXX if the geometry shader is present, this must be done there * instead of here. */ if (dst_reg->index == VARYING_SLOT_COL0 || dst_reg->index == VARYING_SLOT_COL1 || dst_reg->index == VARYING_SLOT_BFC0 || dst_reg->index == VARYING_SLOT_BFC1) { dst = ureg_saturate(dst); } break; case TGSI_PROCESSOR_FRAGMENT: if (dst_reg->index >= FRAG_RESULT_COLOR) { dst = ureg_saturate(dst); } break; } } if (dst_reg->reladdr != NULL) { assert(dst_reg->file != PROGRAM_TEMPORARY); dst = ureg_dst_indirect(dst, ureg_src(t->address[0])); } return dst; } /** * Create a TGSI ureg_src register from an st_src_reg. */ static struct ureg_src translate_src(struct st_translate *t, const st_src_reg *src_reg) { struct ureg_src src = src_register(t, src_reg->file, src_reg->index, src_reg->index2D); if (t->procType == TGSI_PROCESSOR_GEOMETRY && src_reg->has_index2) { src = src_register(t, src_reg->file, src_reg->index, src_reg->index2D); if (src_reg->reladdr2) src = ureg_src_dimension_indirect(src, ureg_src(t->address[1]), src_reg->index2D); else src = ureg_src_dimension(src, src_reg->index2D); } src = ureg_swizzle(src, GET_SWZ(src_reg->swizzle, 0) & 0x3, GET_SWZ(src_reg->swizzle, 1) & 0x3, GET_SWZ(src_reg->swizzle, 2) & 0x3, GET_SWZ(src_reg->swizzle, 3) & 0x3); if ((src_reg->negate & 0xf) == NEGATE_XYZW) src = ureg_negate(src); if (src_reg->reladdr != NULL) { assert(src_reg->file != PROGRAM_TEMPORARY); src = ureg_src_indirect(src, ureg_src(t->address[0])); } return src; } static struct tgsi_texture_offset translate_tex_offset(struct st_translate *t, const struct tgsi_texture_offset *in_offset) { struct tgsi_texture_offset offset; struct ureg_src imm_src; assert(in_offset->File == PROGRAM_IMMEDIATE); imm_src = t->immediates[in_offset->Index]; offset.File = imm_src.File; offset.Index = imm_src.Index; offset.SwizzleX = imm_src.SwizzleX; offset.SwizzleY = imm_src.SwizzleY; offset.SwizzleZ = imm_src.SwizzleZ; offset.File = TGSI_FILE_IMMEDIATE; offset.Padding = 0; return offset; } static void compile_tgsi_instruction(struct st_translate *t, const glsl_to_tgsi_instruction *inst, bool clamp_dst_color_output) { struct ureg_program *ureg = t->ureg; GLuint i; struct ureg_dst dst[1]; struct ureg_src src[4]; struct tgsi_texture_offset texoffsets[MAX_GLSL_TEXTURE_OFFSET]; unsigned num_dst; unsigned num_src; unsigned tex_target; num_dst = num_inst_dst_regs(inst->op); num_src = num_inst_src_regs(inst->op); if (num_dst) dst[0] = translate_dst(t, &inst->dst, inst->saturate, clamp_dst_color_output); for (i = 0; i < num_src; i++) src[i] = translate_src(t, &inst->src[i]); switch(inst->op) { case TGSI_OPCODE_BGNLOOP: case TGSI_OPCODE_CAL: case TGSI_OPCODE_ELSE: case TGSI_OPCODE_ENDLOOP: case TGSI_OPCODE_IF: case TGSI_OPCODE_UIF: assert(num_dst == 0); ureg_label_insn(ureg, inst->op, src, num_src, get_label(t, inst->op == TGSI_OPCODE_CAL ? inst->function->sig_id : 0)); return; case TGSI_OPCODE_TEX: case TGSI_OPCODE_TXB: case TGSI_OPCODE_TXD: case TGSI_OPCODE_TXL: case TGSI_OPCODE_TXP: case TGSI_OPCODE_TXQ: case TGSI_OPCODE_TXF: case TGSI_OPCODE_TEX2: case TGSI_OPCODE_TXB2: case TGSI_OPCODE_TXL2: src[num_src++] = t->samplers[inst->sampler]; for (i = 0; i < inst->tex_offset_num_offset; i++) { texoffsets[i] = translate_tex_offset(t, &inst->tex_offsets[i]); } tex_target = st_translate_texture_target(inst->tex_target, inst->tex_shadow); ureg_tex_insn(ureg, inst->op, dst, num_dst, tex_target, texoffsets, inst->tex_offset_num_offset, src, num_src); return; case TGSI_OPCODE_SCS: dst[0] = ureg_writemask(dst[0], TGSI_WRITEMASK_XY); ureg_insn(ureg, inst->op, dst, num_dst, src, num_src); break; default: ureg_insn(ureg, inst->op, dst, num_dst, src, num_src); break; } } /** * Emit the TGSI instructions for inverting and adjusting WPOS. * This code is unavoidable because it also depends on whether * a FBO is bound (STATE_FB_WPOS_Y_TRANSFORM). */ static void emit_wpos_adjustment( struct st_translate *t, const struct gl_program *program, boolean invert, GLfloat adjX, GLfloat adjY[2]) { struct ureg_program *ureg = t->ureg; /* Fragment program uses fragment position input. * Need to replace instances of INPUT[WPOS] with temp T * where T = INPUT[WPOS] by y is inverted. */ static const gl_state_index wposTransformState[STATE_LENGTH] = { STATE_INTERNAL, STATE_FB_WPOS_Y_TRANSFORM, (gl_state_index)0, (gl_state_index)0, (gl_state_index)0 }; /* XXX: note we are modifying the incoming shader here! Need to * do this before emitting the constant decls below, or this * will be missed: */ unsigned wposTransConst = _mesa_add_state_reference(program->Parameters, wposTransformState); struct ureg_src wpostrans = ureg_DECL_constant( ureg, wposTransConst ); struct ureg_dst wpos_temp = ureg_DECL_temporary( ureg ); struct ureg_src wpos_input = t->inputs[t->inputMapping[VARYING_SLOT_POS]]; /* First, apply the coordinate shift: */ if (adjX || adjY[0] || adjY[1]) { if (adjY[0] != adjY[1]) { /* Adjust the y coordinate by adjY[1] or adjY[0] respectively * depending on whether inversion is actually going to be applied * or not, which is determined by testing against the inversion * state variable used below, which will be either +1 or -1. */ struct ureg_dst adj_temp = ureg_DECL_local_temporary(ureg); ureg_CMP(ureg, adj_temp, ureg_scalar(wpostrans, invert ? 2 : 0), ureg_imm4f(ureg, adjX, adjY[0], 0.0f, 0.0f), ureg_imm4f(ureg, adjX, adjY[1], 0.0f, 0.0f)); ureg_ADD(ureg, wpos_temp, wpos_input, ureg_src(adj_temp)); } else { ureg_ADD(ureg, wpos_temp, wpos_input, ureg_imm4f(ureg, adjX, adjY[0], 0.0f, 0.0f)); } wpos_input = ureg_src(wpos_temp); } else { /* MOV wpos_temp, input[wpos] */ ureg_MOV( ureg, wpos_temp, wpos_input ); } /* Now the conditional y flip: STATE_FB_WPOS_Y_TRANSFORM.xy/zw will be * inversion/identity, or the other way around if we're drawing to an FBO. */ if (invert) { /* MAD wpos_temp.y, wpos_input, wpostrans.xxxx, wpostrans.yyyy */ ureg_MAD( ureg, ureg_writemask(wpos_temp, TGSI_WRITEMASK_Y ), wpos_input, ureg_scalar(wpostrans, 0), ureg_scalar(wpostrans, 1)); } else { /* MAD wpos_temp.y, wpos_input, wpostrans.zzzz, wpostrans.wwww */ ureg_MAD( ureg, ureg_writemask(wpos_temp, TGSI_WRITEMASK_Y ), wpos_input, ureg_scalar(wpostrans, 2), ureg_scalar(wpostrans, 3)); } /* Use wpos_temp as position input from here on: */ t->inputs[t->inputMapping[VARYING_SLOT_POS]] = ureg_src(wpos_temp); } /** * Emit fragment position/ooordinate code. */ static void emit_wpos(struct st_context *st, struct st_translate *t, const struct gl_program *program, struct ureg_program *ureg) { const struct gl_fragment_program *fp = (const struct gl_fragment_program *) program; struct pipe_screen *pscreen = st->pipe->screen; GLfloat adjX = 0.0f; GLfloat adjY[2] = { 0.0f, 0.0f }; boolean invert = FALSE; /* Query the pixel center conventions supported by the pipe driver and set * adjX, adjY to help out if it cannot handle the requested one internally. * * The bias of the y-coordinate depends on whether y-inversion takes place * (adjY[1]) or not (adjY[0]), which is in turn dependent on whether we are * drawing to an FBO (causes additional inversion), and whether the the pipe * driver origin and the requested origin differ (the latter condition is * stored in the 'invert' variable). * * For height = 100 (i = integer, h = half-integer, l = lower, u = upper): * * center shift only: * i -> h: +0.5 * h -> i: -0.5 * * inversion only: * l,i -> u,i: ( 0.0 + 1.0) * -1 + 100 = 99 * l,h -> u,h: ( 0.5 + 0.0) * -1 + 100 = 99.5 * u,i -> l,i: (99.0 + 1.0) * -1 + 100 = 0 * u,h -> l,h: (99.5 + 0.0) * -1 + 100 = 0.5 * * inversion and center shift: * l,i -> u,h: ( 0.0 + 0.5) * -1 + 100 = 99.5 * l,h -> u,i: ( 0.5 + 0.5) * -1 + 100 = 99 * u,i -> l,h: (99.0 + 0.5) * -1 + 100 = 0.5 * u,h -> l,i: (99.5 + 0.5) * -1 + 100 = 0 */ if (fp->OriginUpperLeft) { /* Fragment shader wants origin in upper-left */ if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT)) { /* the driver supports upper-left origin */ } else if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT)) { /* the driver supports lower-left origin, need to invert Y */ ureg_property_fs_coord_origin(ureg, TGSI_FS_COORD_ORIGIN_LOWER_LEFT); invert = TRUE; } else assert(0); } else { /* Fragment shader wants origin in lower-left */ if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT)) /* the driver supports lower-left origin */ ureg_property_fs_coord_origin(ureg, TGSI_FS_COORD_ORIGIN_LOWER_LEFT); else if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT)) /* the driver supports upper-left origin, need to invert Y */ invert = TRUE; else assert(0); } if (fp->PixelCenterInteger) { /* Fragment shader wants pixel center integer */ if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER)) { /* the driver supports pixel center integer */ adjY[1] = 1.0f; ureg_property_fs_coord_pixel_center(ureg, TGSI_FS_COORD_PIXEL_CENTER_INTEGER); } else if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER)) { /* the driver supports pixel center half integer, need to bias X,Y */ adjX = -0.5f; adjY[0] = -0.5f; adjY[1] = 0.5f; } else assert(0); } else { /* Fragment shader wants pixel center half integer */ if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER)) { /* the driver supports pixel center half integer */ } else if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER)) { /* the driver supports pixel center integer, need to bias X,Y */ adjX = adjY[0] = adjY[1] = 0.5f; ureg_property_fs_coord_pixel_center(ureg, TGSI_FS_COORD_PIXEL_CENTER_INTEGER); } else assert(0); } /* we invert after adjustment so that we avoid the MOV to temporary, * and reuse the adjustment ADD instead */ emit_wpos_adjustment(t, program, invert, adjX, adjY); } /** * OpenGL's fragment gl_FrontFace input is 1 for front-facing, 0 for back. * TGSI uses +1 for front, -1 for back. * This function converts the TGSI value to the GL value. Simply clamping/ * saturating the value to [0,1] does the job. */ static void emit_face_var(struct st_translate *t) { struct ureg_program *ureg = t->ureg; struct ureg_dst face_temp = ureg_DECL_temporary(ureg); struct ureg_src face_input = t->inputs[t->inputMapping[VARYING_SLOT_FACE]]; /* MOV_SAT face_temp, input[face] */ face_temp = ureg_saturate(face_temp); ureg_MOV(ureg, face_temp, face_input); /* Use face_temp as face input from here on: */ t->inputs[t->inputMapping[VARYING_SLOT_FACE]] = ureg_src(face_temp); } static void emit_edgeflags(struct st_translate *t) { struct ureg_program *ureg = t->ureg; struct ureg_dst edge_dst = t->outputs[t->outputMapping[VARYING_SLOT_EDGE]]; struct ureg_src edge_src = t->inputs[t->inputMapping[VERT_ATTRIB_EDGEFLAG]]; ureg_MOV(ureg, edge_dst, edge_src); } /** * Translate intermediate IR (glsl_to_tgsi_instruction) to TGSI format. * \param program the program to translate * \param numInputs number of input registers used * \param inputMapping maps Mesa fragment program inputs to TGSI generic * input indexes * \param inputSemanticName the TGSI_SEMANTIC flag for each input * \param inputSemanticIndex the semantic index (ex: which texcoord) for * each input * \param interpMode the TGSI_INTERPOLATE_LINEAR/PERSP mode for each input * \param numOutputs number of output registers used * \param outputMapping maps Mesa fragment program outputs to TGSI * generic outputs * \param outputSemanticName the TGSI_SEMANTIC flag for each output * \param outputSemanticIndex the semantic index (ex: which texcoord) for * each output * * \return PIPE_OK or PIPE_ERROR_OUT_OF_MEMORY */ extern "C" enum pipe_error st_translate_program( struct gl_context *ctx, uint procType, struct ureg_program *ureg, glsl_to_tgsi_visitor *program, const struct gl_program *proginfo, GLuint numInputs, const GLuint inputMapping[], const ubyte inputSemanticName[], const ubyte inputSemanticIndex[], const GLuint interpMode[], const GLboolean is_centroid[], GLuint numOutputs, const GLuint outputMapping[], const ubyte outputSemanticName[], const ubyte outputSemanticIndex[], boolean passthrough_edgeflags, boolean clamp_color) { struct st_translate *t; unsigned i; enum pipe_error ret = PIPE_OK; assert(numInputs <= Elements(t->inputs)); assert(numOutputs <= Elements(t->outputs)); t = CALLOC_STRUCT(st_translate); if (!t) { ret = PIPE_ERROR_OUT_OF_MEMORY; goto out; } memset(t, 0, sizeof *t); t->procType = procType; t->inputMapping = inputMapping; t->outputMapping = outputMapping; t->ureg = ureg; if (program->shader_program) { for (i = 0; i < program->shader_program->NumUserUniformStorage; i++) { struct gl_uniform_storage *const storage = &program->shader_program->UniformStorage[i]; _mesa_uniform_detach_all_driver_storage(storage); } } /* * Declare input attributes. */ if (procType == TGSI_PROCESSOR_FRAGMENT) { for (i = 0; i < numInputs; i++) { t->inputs[i] = ureg_DECL_fs_input_cyl_centroid(ureg, inputSemanticName[i], inputSemanticIndex[i], interpMode[i], 0, is_centroid[i]); } if (proginfo->InputsRead & VARYING_BIT_POS) { /* Must do this after setting up t->inputs, and before * emitting constant references, below: */ emit_wpos(st_context(ctx), t, proginfo, ureg); } if (proginfo->InputsRead & VARYING_BIT_FACE) emit_face_var(t); /* * Declare output attributes. */ for (i = 0; i < numOutputs; i++) { switch (outputSemanticName[i]) { case TGSI_SEMANTIC_POSITION: t->outputs[i] = ureg_DECL_output(ureg, TGSI_SEMANTIC_POSITION, /* Z/Depth */ outputSemanticIndex[i]); t->outputs[i] = ureg_writemask(t->outputs[i], TGSI_WRITEMASK_Z); break; case TGSI_SEMANTIC_STENCIL: t->outputs[i] = ureg_DECL_output(ureg, TGSI_SEMANTIC_STENCIL, /* Stencil */ outputSemanticIndex[i]); t->outputs[i] = ureg_writemask(t->outputs[i], TGSI_WRITEMASK_Y); break; case TGSI_SEMANTIC_COLOR: t->outputs[i] = ureg_DECL_output(ureg, TGSI_SEMANTIC_COLOR, outputSemanticIndex[i]); break; default: assert(!"fragment shader outputs must be POSITION/STENCIL/COLOR"); ret = PIPE_ERROR_BAD_INPUT; goto out; } } } else if (procType == TGSI_PROCESSOR_GEOMETRY) { for (i = 0; i < numInputs; i++) { t->inputs[i] = ureg_DECL_gs_input(ureg, i, inputSemanticName[i], inputSemanticIndex[i]); } for (i = 0; i < numOutputs; i++) { t->outputs[i] = ureg_DECL_output(ureg, outputSemanticName[i], outputSemanticIndex[i]); } } else { assert(procType == TGSI_PROCESSOR_VERTEX); for (i = 0; i < numInputs; i++) { t->inputs[i] = ureg_DECL_vs_input(ureg, i); } for (i = 0; i < numOutputs; i++) { t->outputs[i] = ureg_DECL_output(ureg, outputSemanticName[i], outputSemanticIndex[i]); } if (passthrough_edgeflags) emit_edgeflags(t); } /* Declare address register. */ if (program->num_address_regs > 0) { assert(program->num_address_regs <= 2); t->address[0] = ureg_DECL_address(ureg); if (program->num_address_regs == 2) t->address[1] = ureg_DECL_address(ureg); } /* Declare misc input registers */ { GLbitfield sysInputs = proginfo->SystemValuesRead; unsigned numSys = 0; for (i = 0; sysInputs; i++) { if (sysInputs & (1 << i)) { unsigned semName = mesa_sysval_to_semantic[i]; t->systemValues[i] = ureg_DECL_system_value(ureg, numSys, semName, 0); if (semName == TGSI_SEMANTIC_INSTANCEID || semName == TGSI_SEMANTIC_VERTEXID) { /* From Gallium perspective, these system values are always * integer, and require native integer support. However, if * native integer is supported on the vertex stage but not the * pixel stage (e.g, i915g + draw), Mesa will generate IR that * assumes these system values are floats. To resolve the * inconsistency, we insert a U2F. */ struct st_context *st = st_context(ctx); struct pipe_screen *pscreen = st->pipe->screen; assert(procType == TGSI_PROCESSOR_VERTEX); assert(pscreen->get_shader_param(pscreen, PIPE_SHADER_VERTEX, PIPE_SHADER_CAP_INTEGERS)); if (!ctx->Const.NativeIntegers) { struct ureg_dst temp = ureg_DECL_local_temporary(t->ureg); ureg_U2F( t->ureg, ureg_writemask(temp, TGSI_WRITEMASK_X), t->systemValues[i]); t->systemValues[i] = ureg_scalar(ureg_src(temp), 0); } } numSys++; sysInputs &= ~(1 << i); } } } /* Copy over array sizes */ memcpy(t->array_sizes, program->array_sizes, sizeof(unsigned) * program->next_array); /* Emit constants and uniforms. TGSI uses a single index space for these, * so we put all the translated regs in t->constants. */ if (proginfo->Parameters) { t->constants = (struct ureg_src *) calloc(proginfo->Parameters->NumParameters, sizeof(t->constants[0])); if (t->constants == NULL) { ret = PIPE_ERROR_OUT_OF_MEMORY; goto out; } for (i = 0; i < proginfo->Parameters->NumParameters; i++) { switch (proginfo->Parameters->Parameters[i].Type) { case PROGRAM_ENV_PARAM: case PROGRAM_LOCAL_PARAM: case PROGRAM_STATE_VAR: case PROGRAM_UNIFORM: t->constants[i] = ureg_DECL_constant(ureg, i); break; /* Emit immediates for PROGRAM_CONSTANT only when there's no indirect * addressing of the const buffer. * FIXME: Be smarter and recognize param arrays: * indirect addressing is only valid within the referenced * array. */ case PROGRAM_CONSTANT: if (program->indirect_addr_consts) t->constants[i] = ureg_DECL_constant(ureg, i); else t->constants[i] = emit_immediate(t, proginfo->Parameters->ParameterValues[i], proginfo->Parameters->Parameters[i].DataType, 4); break; default: break; } } } if (program->shader_program) { unsigned num_ubos = program->shader_program->NumUniformBlocks; for (i = 0; i < num_ubos; i++) { ureg_DECL_constant2D(t->ureg, 0, program->shader_program->UniformBlocks[i].UniformBufferSize / 4, i + 1); } } /* Emit immediate values. */ t->immediates = (struct ureg_src *) calloc(program->num_immediates, sizeof(struct ureg_src)); if (t->immediates == NULL) { ret = PIPE_ERROR_OUT_OF_MEMORY; goto out; } i = 0; foreach_iter(exec_list_iterator, iter, program->immediates) { immediate_storage *imm = (immediate_storage *)iter.get(); assert(i < program->num_immediates); t->immediates[i++] = emit_immediate(t, imm->values, imm->type, imm->size); } assert(i == program->num_immediates); /* texture samplers */ for (i = 0; i < ctx->Const.FragmentProgram.MaxTextureImageUnits; i++) { if (program->samplers_used & (1 << i)) { t->samplers[i] = ureg_DECL_sampler(ureg, i); } } /* Emit each instruction in turn: */ foreach_iter(exec_list_iterator, iter, program->instructions) { set_insn_start(t, ureg_get_instruction_number(ureg)); compile_tgsi_instruction(t, (glsl_to_tgsi_instruction *)iter.get(), clamp_color); } /* Fix up all emitted labels: */ for (i = 0; i < t->labels_count; i++) { ureg_fixup_label(ureg, t->labels[i].token, t->insn[t->labels[i].branch_target]); } if (program->shader_program) { /* This has to be done last. Any operation the can cause * prog->ParameterValues to get reallocated (e.g., anything that adds a * program constant) has to happen before creating this linkage. */ for (unsigned i = 0; i < MESA_SHADER_TYPES; i++) { if (program->shader_program->_LinkedShaders[i] == NULL) continue; _mesa_associate_uniform_storage(ctx, program->shader_program, program->shader_program->_LinkedShaders[i]->Program->Parameters); } } out: if (t) { free(t->insn); free(t->labels); free(t->constants); free(t->immediates); if (t->error) { debug_printf("%s: translate error flag set\n", __FUNCTION__); } free(t); } return ret; } /* ----------------------------- End TGSI code ------------------------------ */ /** * Convert a shader's GLSL IR into a Mesa gl_program, although without * generating Mesa IR. */ static struct gl_program * get_mesa_program(struct gl_context *ctx, struct gl_shader_program *shader_program, struct gl_shader *shader) { glsl_to_tgsi_visitor* v; struct gl_program *prog; GLenum target; bool progress; struct gl_shader_compiler_options *options = &ctx->ShaderCompilerOptions[_mesa_shader_type_to_index(shader->Type)]; struct pipe_screen *pscreen = ctx->st->pipe->screen; unsigned ptarget; switch (shader->Type) { case GL_VERTEX_SHADER: target = GL_VERTEX_PROGRAM_ARB; ptarget = PIPE_SHADER_VERTEX; break; case GL_FRAGMENT_SHADER: target = GL_FRAGMENT_PROGRAM_ARB; ptarget = PIPE_SHADER_FRAGMENT; break; case GL_GEOMETRY_SHADER: target = GL_GEOMETRY_PROGRAM_NV; ptarget = PIPE_SHADER_GEOMETRY; break; default: assert(!"should not be reached"); return NULL; } validate_ir_tree(shader->ir); prog = ctx->Driver.NewProgram(ctx, target, shader_program->Name); if (!prog) return NULL; prog->Parameters = _mesa_new_parameter_list(); v = new glsl_to_tgsi_visitor(); v->ctx = ctx; v->prog = prog; v->shader_program = shader_program; v->options = options; v->glsl_version = ctx->Const.GLSLVersion; v->native_integers = ctx->Const.NativeIntegers; v->have_sqrt = pscreen->get_shader_param(pscreen, ptarget, PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED); _mesa_generate_parameters_list_for_uniforms(shader_program, shader, prog->Parameters); /* Remove reads from output registers. */ lower_output_reads(shader->ir); /* Emit intermediate IR for main(). */ visit_exec_list(shader->ir, v); /* Now emit bodies for any functions that were used. */ do { progress = GL_FALSE; foreach_iter(exec_list_iterator, iter, v->function_signatures) { function_entry *entry = (function_entry *)iter.get(); if (!entry->bgn_inst) { v->current_function = entry; entry->bgn_inst = v->emit(NULL, TGSI_OPCODE_BGNSUB); entry->bgn_inst->function = entry; visit_exec_list(&entry->sig->body, v); glsl_to_tgsi_instruction *last; last = (glsl_to_tgsi_instruction *)v->instructions.get_tail(); if (last->op != TGSI_OPCODE_RET) v->emit(NULL, TGSI_OPCODE_RET); glsl_to_tgsi_instruction *end; end = v->emit(NULL, TGSI_OPCODE_ENDSUB); end->function = entry; progress = GL_TRUE; } } } while (progress); #if 0 /* Print out some information (for debugging purposes) used by the * optimization passes. */ for (i=0; i < v->next_temp; i++) { int fr = v->get_first_temp_read(i); int fw = v->get_first_temp_write(i); int lr = v->get_last_temp_read(i); int lw = v->get_last_temp_write(i); printf("Temp %d: FR=%3d FW=%3d LR=%3d LW=%3d\n", i, fr, fw, lr, lw); assert(fw <= fr); } #endif /* Perform optimizations on the instructions in the glsl_to_tgsi_visitor. */ v->simplify_cmp(); v->copy_propagate(); while (v->eliminate_dead_code_advanced()); v->eliminate_dead_code(); v->merge_registers(); v->renumber_registers(); /* Write the END instruction. */ v->emit(NULL, TGSI_OPCODE_END); if (ctx->Shader.Flags & GLSL_DUMP) { printf("\n"); printf("GLSL IR for linked %s program %d:\n", _mesa_glsl_shader_target_name(shader->Type), shader_program->Name); _mesa_print_ir(shader->ir, NULL); printf("\n"); printf("\n"); fflush(stdout); } prog->Instructions = NULL; prog->NumInstructions = 0; do_set_program_inouts(shader->ir, prog, shader->Type); count_resources(v, prog); _mesa_reference_program(ctx, &shader->Program, prog); /* This has to be done last. Any operation the can cause * prog->ParameterValues to get reallocated (e.g., anything that adds a * program constant) has to happen before creating this linkage. */ _mesa_associate_uniform_storage(ctx, shader_program, prog->Parameters); if (!shader_program->LinkStatus) { return NULL; } struct st_vertex_program *stvp; struct st_fragment_program *stfp; struct st_geometry_program *stgp; switch (shader->Type) { case GL_VERTEX_SHADER: stvp = (struct st_vertex_program *)prog; stvp->glsl_to_tgsi = v; break; case GL_FRAGMENT_SHADER: stfp = (struct st_fragment_program *)prog; stfp->glsl_to_tgsi = v; break; case GL_GEOMETRY_SHADER: stgp = (struct st_geometry_program *)prog; stgp->glsl_to_tgsi = v; stgp->Base.InputType = shader_program->Geom.InputType; stgp->Base.OutputType = shader_program->Geom.OutputType; stgp->Base.VerticesOut = shader_program->Geom.VerticesOut; break; default: assert(!"should not be reached"); return NULL; } return prog; } extern "C" { struct gl_shader * st_new_shader(struct gl_context *ctx, GLuint name, GLuint type) { struct gl_shader *shader; assert(type == GL_FRAGMENT_SHADER || type == GL_VERTEX_SHADER || type == GL_GEOMETRY_SHADER_ARB); shader = rzalloc(NULL, struct gl_shader); if (shader) { shader->Type = type; shader->Name = name; _mesa_init_shader(ctx, shader); } return shader; } struct gl_shader_program * st_new_shader_program(struct gl_context *ctx, GLuint name) { struct gl_shader_program *shProg; shProg = rzalloc(NULL, struct gl_shader_program); if (shProg) { shProg->Name = name; _mesa_init_shader_program(ctx, shProg); } return shProg; } /** * Link a shader. * Called via ctx->Driver.LinkShader() * This actually involves converting GLSL IR into an intermediate TGSI-like IR * with code lowering and other optimizations. */ GLboolean st_link_shader(struct gl_context *ctx, struct gl_shader_program *prog) { assert(prog->LinkStatus); for (unsigned i = 0; i < MESA_SHADER_TYPES; i++) { if (prog->_LinkedShaders[i] == NULL) continue; bool progress; exec_list *ir = prog->_LinkedShaders[i]->ir; const struct gl_shader_compiler_options *options = &ctx->ShaderCompilerOptions[_mesa_shader_type_to_index(prog->_LinkedShaders[i]->Type)]; /* If there are forms of indirect addressing that the driver * cannot handle, perform the lowering pass. */ if (options->EmitNoIndirectInput || options->EmitNoIndirectOutput || options->EmitNoIndirectTemp || options->EmitNoIndirectUniform) { lower_variable_index_to_cond_assign(ir, options->EmitNoIndirectInput, options->EmitNoIndirectOutput, options->EmitNoIndirectTemp, options->EmitNoIndirectUniform); } if (ctx->Extensions.ARB_shading_language_packing) { unsigned lower_inst = LOWER_PACK_SNORM_2x16 | LOWER_UNPACK_SNORM_2x16 | LOWER_PACK_UNORM_2x16 | LOWER_UNPACK_UNORM_2x16 | LOWER_PACK_SNORM_4x8 | LOWER_UNPACK_SNORM_4x8 | LOWER_UNPACK_UNORM_4x8 | LOWER_PACK_UNORM_4x8 | LOWER_PACK_HALF_2x16 | LOWER_UNPACK_HALF_2x16; lower_packing_builtins(ir, lower_inst); } do_mat_op_to_vec(ir); lower_instructions(ir, MOD_TO_FRACT | DIV_TO_MUL_RCP | EXP_TO_EXP2 | LOG_TO_LOG2 | (options->EmitNoPow ? POW_TO_EXP2 : 0) | (!ctx->Const.NativeIntegers ? INT_DIV_TO_MUL_RCP : 0)); lower_ubo_reference(prog->_LinkedShaders[i], ir); do_vec_index_to_cond_assign(ir); lower_vector_insert(ir, true); lower_quadop_vector(ir, false); lower_noise(ir); if (options->MaxIfDepth == 0) { lower_discard(ir); } do { progress = false; progress = do_lower_jumps(ir, true, true, options->EmitNoMainReturn, options->EmitNoCont, options->EmitNoLoops) || progress; progress = do_common_optimization(ir, true, true, options->MaxUnrollIterations, options) || progress; progress = lower_if_to_cond_assign(ir, options->MaxIfDepth) || progress; } while (progress); validate_ir_tree(ir); } for (unsigned i = 0; i < MESA_SHADER_TYPES; i++) { struct gl_program *linked_prog; if (prog->_LinkedShaders[i] == NULL) continue; linked_prog = get_mesa_program(ctx, prog, prog->_LinkedShaders[i]); if (linked_prog) { _mesa_reference_program(ctx, &prog->_LinkedShaders[i]->Program, linked_prog); if (!ctx->Driver.ProgramStringNotify(ctx, _mesa_program_index_to_target(i), linked_prog)) { _mesa_reference_program(ctx, &prog->_LinkedShaders[i]->Program, NULL); _mesa_reference_program(ctx, &linked_prog, NULL); return GL_FALSE; } } _mesa_reference_program(ctx, &linked_prog, NULL); } return GL_TRUE; } void st_translate_stream_output_info(glsl_to_tgsi_visitor *glsl_to_tgsi, const GLuint outputMapping[], struct pipe_stream_output_info *so) { unsigned i; struct gl_transform_feedback_info *info = &glsl_to_tgsi->shader_program->LinkedTransformFeedback; for (i = 0; i < info->NumOutputs; i++) { so->output[i].register_index = outputMapping[info->Outputs[i].OutputRegister]; so->output[i].start_component = info->Outputs[i].ComponentOffset; so->output[i].num_components = info->Outputs[i].NumComponents; so->output[i].output_buffer = info->Outputs[i].OutputBuffer; so->output[i].dst_offset = info->Outputs[i].DstOffset; } for (i = 0; i < PIPE_MAX_SO_BUFFERS; i++) { so->stride[i] = info->BufferStride[i]; } so->num_outputs = info->NumOutputs; } } /* extern "C" */