/************************************************************************** * * Copyright 2007-2008 VMware, Inc. * All Rights Reserved. * * 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, sub license, 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 NON-INFRINGEMENT. * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS 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. * **************************************************************************/ /* * \author * Michal Krol, * Keith Whitwell */ #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 "tgsi/tgsi_ureg.h" #include "st_mesa_to_tgsi.h" #include "st_context.h" #include "program/prog_instruction.h" #include "program/prog_parameter.h" #include "util/u_debug.h" #include "util/u_math.h" #include "util/u_memory.h" #include "st_glsl_to_tgsi.h" /* for _mesa_sysval_to_semantic */ #define PROGRAM_ANY_CONST ((1 << PROGRAM_STATE_VAR) | \ (1 << PROGRAM_CONSTANT) | \ (1 << PROGRAM_UNIFORM)) /** * Intermediate state used during shader translation. */ struct st_translate { struct ureg_program *ureg; struct ureg_dst temps[MAX_PROGRAM_TEMPS]; struct ureg_src *constants; struct ureg_dst outputs[PIPE_MAX_SHADER_OUTPUTS]; struct ureg_src inputs[PIPE_MAX_SHADER_INPUTS]; struct ureg_dst address[1]; struct ureg_src samplers[PIPE_MAX_SAMPLERS]; struct ureg_src systemValues[SYSTEM_VALUE_MAX]; const ubyte *inputMapping; const ubyte *outputMapping; unsigned procType; /**< PIPE_SHADER_VERTEX/FRAGMENT */ }; /** * Map a Mesa dst register to a TGSI ureg_dst register. */ static struct ureg_dst dst_register( struct st_translate *t, gl_register_file file, GLuint index ) { switch( file ) { case PROGRAM_UNDEFINED: return ureg_dst_undef(); case PROGRAM_TEMPORARY: if (ureg_dst_is_undef(t->temps[index])) t->temps[index] = ureg_DECL_temporary( t->ureg ); return t->temps[index]; case PROGRAM_OUTPUT: if (t->procType == PIPE_SHADER_VERTEX) assert(index < VARYING_SLOT_MAX); else if (t->procType == PIPE_SHADER_FRAGMENT) assert(index < FRAG_RESULT_MAX); else assert(index < VARYING_SLOT_MAX); assert(t->outputMapping[index] < ARRAY_SIZE(t->outputs)); return t->outputs[t->outputMapping[index]]; case PROGRAM_ADDRESS: return t->address[index]; default: debug_assert( 0 ); return ureg_dst_undef(); } } /** * Map a Mesa src register to a TGSI ureg_src register. */ static struct ureg_src src_register( struct st_translate *t, gl_register_file file, GLint index ) { switch( file ) { case PROGRAM_UNDEFINED: return ureg_src_undef(); case PROGRAM_TEMPORARY: assert(index >= 0); assert(index < ARRAY_SIZE(t->temps)); if (ureg_dst_is_undef(t->temps[index])) t->temps[index] = ureg_DECL_temporary( t->ureg ); return ureg_src(t->temps[index]); case PROGRAM_UNIFORM: assert(index >= 0); return t->constants[index]; case PROGRAM_STATE_VAR: case PROGRAM_CONSTANT: /* ie, immediate */ if (index < 0) return ureg_DECL_constant( t->ureg, 0 ); else return t->constants[index]; case PROGRAM_INPUT: assert(t->inputMapping[index] < ARRAY_SIZE(t->inputs)); return t->inputs[t->inputMapping[index]]; case PROGRAM_OUTPUT: assert(t->outputMapping[index] < ARRAY_SIZE(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 < ARRAY_SIZE(t->systemValues)); return t->systemValues[index]; default: debug_assert( 0 ); return ureg_src_undef(); } } /** * Map mesa texture target to TGSI texture target. */ unsigned st_translate_texture_target(GLuint textarget, GLboolean shadow) { if (shadow) { switch (textarget) { case TEXTURE_1D_INDEX: return TGSI_TEXTURE_SHADOW1D; case TEXTURE_2D_INDEX: return TGSI_TEXTURE_SHADOW2D; case TEXTURE_RECT_INDEX: return TGSI_TEXTURE_SHADOWRECT; case TEXTURE_1D_ARRAY_INDEX: return TGSI_TEXTURE_SHADOW1D_ARRAY; case TEXTURE_2D_ARRAY_INDEX: return TGSI_TEXTURE_SHADOW2D_ARRAY; case TEXTURE_CUBE_INDEX: return TGSI_TEXTURE_SHADOWCUBE; case TEXTURE_CUBE_ARRAY_INDEX: return TGSI_TEXTURE_SHADOWCUBE_ARRAY; default: break; } } switch (textarget) { case TEXTURE_2D_MULTISAMPLE_INDEX: return TGSI_TEXTURE_2D_MSAA; case TEXTURE_2D_MULTISAMPLE_ARRAY_INDEX: return TGSI_TEXTURE_2D_ARRAY_MSAA; case TEXTURE_BUFFER_INDEX: return TGSI_TEXTURE_BUFFER; case TEXTURE_1D_INDEX: return TGSI_TEXTURE_1D; case TEXTURE_2D_INDEX: return TGSI_TEXTURE_2D; case TEXTURE_3D_INDEX: return TGSI_TEXTURE_3D; case TEXTURE_CUBE_INDEX: return TGSI_TEXTURE_CUBE; case TEXTURE_CUBE_ARRAY_INDEX: return TGSI_TEXTURE_CUBE_ARRAY; case TEXTURE_RECT_INDEX: return TGSI_TEXTURE_RECT; case TEXTURE_1D_ARRAY_INDEX: return TGSI_TEXTURE_1D_ARRAY; case TEXTURE_2D_ARRAY_INDEX: return TGSI_TEXTURE_2D_ARRAY; case TEXTURE_EXTERNAL_INDEX: return TGSI_TEXTURE_2D; default: debug_assert(!"unexpected texture target index"); return TGSI_TEXTURE_1D; } } /** * Map GLSL base type to TGSI return type. */ unsigned st_translate_texture_type(enum glsl_base_type type) { switch (type) { case GLSL_TYPE_INT: return TGSI_RETURN_TYPE_SINT; case GLSL_TYPE_UINT: return TGSI_RETURN_TYPE_UINT; case GLSL_TYPE_FLOAT: return TGSI_RETURN_TYPE_FLOAT; default: assert(!"unexpected texture type"); return TGSI_RETURN_TYPE_UNKNOWN; } } /** * Translate a (1 << TEXTURE_x_INDEX) bit into a TGSI_TEXTURE_x enum. */ static unsigned translate_texture_index(GLbitfield texBit, bool shadow) { int index = ffs(texBit); assert(index > 0); assert(index - 1 < NUM_TEXTURE_TARGETS); return st_translate_texture_target(index - 1, shadow); } /** * Create a TGSI ureg_dst register from a Mesa dest register. */ static struct ureg_dst translate_dst( struct st_translate *t, const struct prog_dst_register *DstReg, boolean saturate) { struct ureg_dst dst = dst_register( t, DstReg->File, DstReg->Index ); dst = ureg_writemask( dst, DstReg->WriteMask ); if (saturate) dst = ureg_saturate( dst ); if (DstReg->RelAddr) dst = ureg_dst_indirect( dst, ureg_src(t->address[0]) ); return dst; } /** * Create a TGSI ureg_src register from a Mesa src register. */ static struct ureg_src translate_src( struct st_translate *t, const struct prog_src_register *SrcReg ) { struct ureg_src src = src_register( t, SrcReg->File, SrcReg->Index ); src = ureg_swizzle( src, GET_SWZ( SrcReg->Swizzle, 0 ) & 0x3, GET_SWZ( SrcReg->Swizzle, 1 ) & 0x3, GET_SWZ( SrcReg->Swizzle, 2 ) & 0x3, GET_SWZ( SrcReg->Swizzle, 3 ) & 0x3); if (SrcReg->Negate == NEGATE_XYZW) src = ureg_negate(src); if (SrcReg->RelAddr) { src = ureg_src_indirect( src, ureg_src(t->address[0])); if (SrcReg->File != PROGRAM_INPUT && SrcReg->File != PROGRAM_OUTPUT) { /* If SrcReg->Index was negative, it was set to zero in * src_register(). Reassign it now. But don't do this * for input/output regs since they get remapped while * const buffers don't. */ src.Index = SrcReg->Index; } } return src; } static struct ureg_src swizzle_4v( struct ureg_src src, const unsigned *swz ) { return ureg_swizzle( src, swz[0], swz[1], swz[2], swz[3] ); } /** * Translate a SWZ instruction into a MOV, MUL or MAD instruction. EG: * * SWZ dst, src.x-y10 * * becomes: * * MAD dst {1,-1,0,0}, src.xyxx, {0,0,1,0} */ static void emit_swz( struct st_translate *t, struct ureg_dst dst, const struct prog_src_register *SrcReg ) { struct ureg_program *ureg = t->ureg; struct ureg_src src = src_register( t, SrcReg->File, SrcReg->Index ); unsigned negate_mask = SrcReg->Negate; unsigned one_mask = ((GET_SWZ(SrcReg->Swizzle, 0) == SWIZZLE_ONE) << 0 | (GET_SWZ(SrcReg->Swizzle, 1) == SWIZZLE_ONE) << 1 | (GET_SWZ(SrcReg->Swizzle, 2) == SWIZZLE_ONE) << 2 | (GET_SWZ(SrcReg->Swizzle, 3) == SWIZZLE_ONE) << 3); unsigned zero_mask = ((GET_SWZ(SrcReg->Swizzle, 0) == SWIZZLE_ZERO) << 0 | (GET_SWZ(SrcReg->Swizzle, 1) == SWIZZLE_ZERO) << 1 | (GET_SWZ(SrcReg->Swizzle, 2) == SWIZZLE_ZERO) << 2 | (GET_SWZ(SrcReg->Swizzle, 3) == SWIZZLE_ZERO) << 3); unsigned negative_one_mask = one_mask & negate_mask; unsigned positive_one_mask = one_mask & ~negate_mask; struct ureg_src imm; unsigned i; unsigned mul_swizzle[4] = {0,0,0,0}; unsigned add_swizzle[4] = {0,0,0,0}; unsigned src_swizzle[4] = {0,0,0,0}; boolean need_add = FALSE; boolean need_mul = FALSE; if (dst.WriteMask == 0) return; /* Is this just a MOV? */ if (zero_mask == 0 && one_mask == 0 && (negate_mask == 0 || negate_mask == TGSI_WRITEMASK_XYZW)) { ureg_MOV( ureg, dst, translate_src( t, SrcReg )); return; } #define IMM_ZERO 0 #define IMM_ONE 1 #define IMM_NEG_ONE 2 imm = ureg_imm3f( ureg, 0, 1, -1 ); for (i = 0; i < 4; i++) { unsigned bit = 1 << i; if (dst.WriteMask & bit) { if (positive_one_mask & bit) { mul_swizzle[i] = IMM_ZERO; add_swizzle[i] = IMM_ONE; need_add = TRUE; } else if (negative_one_mask & bit) { mul_swizzle[i] = IMM_ZERO; add_swizzle[i] = IMM_NEG_ONE; need_add = TRUE; } else if (zero_mask & bit) { mul_swizzle[i] = IMM_ZERO; add_swizzle[i] = IMM_ZERO; need_add = TRUE; } else { add_swizzle[i] = IMM_ZERO; src_swizzle[i] = GET_SWZ(SrcReg->Swizzle, i); need_mul = TRUE; if (negate_mask & bit) { mul_swizzle[i] = IMM_NEG_ONE; } else { mul_swizzle[i] = IMM_ONE; } } } } if (need_mul && need_add) { ureg_MAD( ureg, dst, swizzle_4v( src, src_swizzle ), swizzle_4v( imm, mul_swizzle ), swizzle_4v( imm, add_swizzle ) ); } else if (need_mul) { ureg_MUL( ureg, dst, swizzle_4v( src, src_swizzle ), swizzle_4v( imm, mul_swizzle ) ); } else if (need_add) { ureg_MOV( ureg, dst, swizzle_4v( imm, add_swizzle ) ); } else { debug_assert(0); } #undef IMM_ZERO #undef IMM_ONE #undef IMM_NEG_ONE } static unsigned translate_opcode( unsigned op ) { switch( op ) { case OPCODE_ARL: return TGSI_OPCODE_ARL; case OPCODE_ADD: return TGSI_OPCODE_ADD; case OPCODE_CMP: return TGSI_OPCODE_CMP; case OPCODE_COS: return TGSI_OPCODE_COS; case OPCODE_DP3: return TGSI_OPCODE_DP3; case OPCODE_DP4: return TGSI_OPCODE_DP4; case OPCODE_DPH: return TGSI_OPCODE_DPH; case OPCODE_DST: return TGSI_OPCODE_DST; case OPCODE_EX2: return TGSI_OPCODE_EX2; case OPCODE_EXP: return TGSI_OPCODE_EXP; case OPCODE_FLR: return TGSI_OPCODE_FLR; case OPCODE_FRC: return TGSI_OPCODE_FRC; case OPCODE_KIL: return TGSI_OPCODE_KILL_IF; case OPCODE_LG2: return TGSI_OPCODE_LG2; case OPCODE_LOG: return TGSI_OPCODE_LOG; case OPCODE_LIT: return TGSI_OPCODE_LIT; case OPCODE_LRP: return TGSI_OPCODE_LRP; case OPCODE_MAD: return TGSI_OPCODE_MAD; case OPCODE_MAX: return TGSI_OPCODE_MAX; case OPCODE_MIN: return TGSI_OPCODE_MIN; case OPCODE_MOV: return TGSI_OPCODE_MOV; case OPCODE_MUL: return TGSI_OPCODE_MUL; case OPCODE_POW: return TGSI_OPCODE_POW; case OPCODE_RCP: return TGSI_OPCODE_RCP; case OPCODE_SCS: return TGSI_OPCODE_SCS; case OPCODE_SGE: return TGSI_OPCODE_SGE; case OPCODE_SIN: return TGSI_OPCODE_SIN; case OPCODE_SLT: return TGSI_OPCODE_SLT; case OPCODE_TEX: return TGSI_OPCODE_TEX; case OPCODE_TXB: return TGSI_OPCODE_TXB; case OPCODE_TXP: return TGSI_OPCODE_TXP; case OPCODE_XPD: return TGSI_OPCODE_XPD; case OPCODE_END: return TGSI_OPCODE_END; default: debug_assert( 0 ); return TGSI_OPCODE_NOP; } } static void compile_instruction( struct gl_context *ctx, struct st_translate *t, const struct prog_instruction *inst) { struct ureg_program *ureg = t->ureg; GLuint i; struct ureg_dst dst[1] = { { 0 } }; struct ureg_src src[4]; unsigned num_dst; unsigned num_src; num_dst = _mesa_num_inst_dst_regs( inst->Opcode ); num_src = _mesa_num_inst_src_regs( inst->Opcode ); if (num_dst) dst[0] = translate_dst( t, &inst->DstReg, inst->Saturate); for (i = 0; i < num_src; i++) src[i] = translate_src( t, &inst->SrcReg[i] ); switch( inst->Opcode ) { case OPCODE_SWZ: emit_swz( t, dst[0], &inst->SrcReg[0] ); return; case OPCODE_TEX: case OPCODE_TXB: case OPCODE_TXP: src[num_src++] = t->samplers[inst->TexSrcUnit]; ureg_tex_insn( ureg, translate_opcode( inst->Opcode ), dst, num_dst, st_translate_texture_target( inst->TexSrcTarget, inst->TexShadow ), TGSI_RETURN_TYPE_FLOAT, NULL, 0, src, num_src ); return; case OPCODE_SCS: dst[0] = ureg_writemask(dst[0], TGSI_WRITEMASK_XY ); ureg_insn( ureg, translate_opcode( inst->Opcode ), dst, num_dst, src, num_src, 0 ); break; case OPCODE_XPD: dst[0] = ureg_writemask(dst[0], TGSI_WRITEMASK_XYZ ); ureg_insn( ureg, translate_opcode( inst->Opcode ), dst, num_dst, src, num_src, 0 ); break; case OPCODE_RSQ: ureg_RSQ( ureg, dst[0], ureg_abs(src[0]) ); break; case OPCODE_ABS: ureg_MOV(ureg, dst[0], ureg_abs(src[0])); break; case OPCODE_SUB: ureg_ADD(ureg, dst[0], src[0], ureg_negate(src[1])); break; default: ureg_insn( ureg, translate_opcode( inst->Opcode ), dst, num_dst, src, num_src, 0); 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 gl_context *ctx, 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, 0, 0, 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 = ctx->Const.GLSLFragCoordIsSysVal ? &t->systemValues[SYSTEM_VALUE_FRAG_COORD] : &t->inputs[t->inputMapping[VARYING_SLOT_POS]]; struct ureg_src wpos_input = *wpos; /* 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_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: */ *wpos = ureg_src(wpos_temp); } /** * Emit fragment position/coordinate code. */ static void emit_wpos(struct st_context *st, struct st_translate *t, const struct gl_program *program, struct ureg_program *ureg) { 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 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 (program->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(ureg, TGSI_PROPERTY_FS_COORD_ORIGIN, 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(ureg, TGSI_PROPERTY_FS_COORD_ORIGIN, 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 (program->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(ureg, TGSI_PROPERTY_FS_COORD_PIXEL_CENTER, 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(ureg, TGSI_PROPERTY_FS_COORD_PIXEL_CENTER, 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(st->ctx, t, program, invert, adjX, adjY); } /** * Translate Mesa program 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 */ enum pipe_error st_translate_mesa_program( struct gl_context *ctx, uint procType, struct ureg_program *ureg, const struct gl_program *program, GLuint numInputs, const ubyte inputMapping[], const ubyte inputSemanticName[], const ubyte inputSemanticIndex[], const ubyte interpMode[], GLuint numOutputs, const ubyte outputMapping[], const ubyte outputSemanticName[], const ubyte outputSemanticIndex[]) { struct st_translate translate, *t; unsigned i; enum pipe_error ret = PIPE_OK; assert(numInputs <= ARRAY_SIZE(t->inputs)); assert(numOutputs <= ARRAY_SIZE(t->outputs)); t = &translate; memset(t, 0, sizeof *t); t->procType = procType; t->inputMapping = inputMapping; t->outputMapping = outputMapping; t->ureg = ureg; /*_mesa_print_program(program);*/ /* * Declare input attributes. */ if (procType == PIPE_SHADER_FRAGMENT) { for (i = 0; i < numInputs; i++) { t->inputs[i] = ureg_DECL_fs_input(ureg, inputSemanticName[i], inputSemanticIndex[i], interpMode[i]); } if (program->info.inputs_read & VARYING_BIT_POS) { /* Must do this after setting up t->inputs, and before * emitting constant references, below: */ emit_wpos(st_context(ctx), t, program, ureg); } /* * 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: debug_assert(0); return 0; } } } else if (procType == PIPE_SHADER_GEOMETRY) { for (i = 0; i < numInputs; i++) { t->inputs[i] = ureg_DECL_input(ureg, inputSemanticName[i], inputSemanticIndex[i], 0, 1); } for (i = 0; i < numOutputs; i++) { t->outputs[i] = ureg_DECL_output( ureg, outputSemanticName[i], outputSemanticIndex[i] ); } } else { assert(procType == PIPE_SHADER_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 (outputSemanticName[i] == TGSI_SEMANTIC_FOG) { /* force register to contain a fog coordinate in the form (F, 0, 0, 1). */ ureg_MOV(ureg, ureg_writemask(t->outputs[i], TGSI_WRITEMASK_YZW), ureg_imm4f(ureg, 0.0f, 0.0f, 0.0f, 1.0f)); t->outputs[i] = ureg_writemask(t->outputs[i], TGSI_WRITEMASK_X); } } } /* Declare address register. */ if (program->arb.NumAddressRegs > 0) { debug_assert( program->arb.NumAddressRegs == 1 ); t->address[0] = ureg_DECL_address( ureg ); } /* Declare misc input registers */ GLbitfield sysInputs = program->info.system_values_read; for (i = 0; sysInputs; i++) { if (sysInputs & (1 << i)) { unsigned semName = _mesa_sysval_to_semantic(i); t->systemValues[i] = ureg_DECL_system_value(ureg, 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 == PIPE_SHADER_VERTEX); assert(pscreen->get_shader_param(pscreen, PIPE_SHADER_VERTEX, PIPE_SHADER_CAP_INTEGERS)); (void) pscreen; /* silence non-debug build warnings */ 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); } } if (procType == PIPE_SHADER_FRAGMENT && semName == TGSI_SEMANTIC_POSITION) emit_wpos(st_context(ctx), t, program, ureg); sysInputs &= ~(1 << i); } } if (program->arb.IndirectRegisterFiles & (1 << PROGRAM_TEMPORARY)) { /* If temps are accessed with indirect addressing, declare temporaries * in sequential order. Else, we declare them on demand elsewhere. */ for (i = 0; i < program->arb.NumTemporaries; i++) { /* XXX use TGSI_FILE_TEMPORARY_ARRAY when it's supported by ureg */ t->temps[i] = ureg_DECL_temporary( t->ureg ); } } /* Emit constants and immediates. Mesa uses a single index space * for these, so we put all the translated regs in t->constants. */ if (program->Parameters) { t->constants = calloc( program->Parameters->NumParameters, sizeof t->constants[0] ); if (t->constants == NULL) { ret = PIPE_ERROR_OUT_OF_MEMORY; goto out; } for (i = 0; i < program->Parameters->NumParameters; i++) { switch (program->Parameters->Parameters[i].Type) { case PROGRAM_STATE_VAR: case PROGRAM_UNIFORM: t->constants[i] = ureg_DECL_constant( ureg, i ); break; /* Emit immediates 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->arb.IndirectRegisterFiles & PROGRAM_ANY_CONST) t->constants[i] = ureg_DECL_constant( ureg, i ); else t->constants[i] = ureg_DECL_immediate( ureg, (const float*) program->Parameters->ParameterValues[i], 4 ); break; default: break; } } } /* texture samplers */ for (i = 0; i < ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits; i++) { if (program->SamplersUsed & (1u << i)) { unsigned target = translate_texture_index(program->TexturesUsed[i], !!(program->ShadowSamplers & (1 << i))); t->samplers[i] = ureg_DECL_sampler( ureg, i ); ureg_DECL_sampler_view(ureg, i, target, TGSI_RETURN_TYPE_FLOAT, TGSI_RETURN_TYPE_FLOAT, TGSI_RETURN_TYPE_FLOAT, TGSI_RETURN_TYPE_FLOAT); } } /* Emit each instruction in turn: */ for (i = 0; i < program->arb.NumInstructions; i++) compile_instruction(ctx, t, &program->arb.Instructions[i]); out: free(t->constants); return ret; }