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/*
* Copyright © 2009 Intel Corporation
*
* 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 prog_parameter_layout.c
* \brief Helper functions to layout storage for program parameters
*
* \author Ian Romanick <ian.d.romanick@intel.com>
*/
#include "main/compiler.h"
#include "main/mtypes.h"
#include "prog_parameter.h"
#include "prog_parameter_layout.h"
#include "prog_instruction.h"
#include "program_parser.h"
unsigned
_mesa_combine_swizzles(unsigned base, unsigned applied)
{
unsigned swiz = 0;
unsigned i;
for (i = 0; i < 4; i++) {
const unsigned s = GET_SWZ(applied, i);
swiz |= ((s <= SWIZZLE_W) ? GET_SWZ(base, s) : s) << (i * 3);
}
return swiz;
}
/**
* Copy indirect access array from one parameter list to another
*
* \param src Parameter array copied from
* \param dst Parameter array copied to
* \param first Index of first element in \c src to copy
* \param count Number of elements to copy
*
* \return
* The location in \c dst of the first element copied from \c src on
* success. -1 on failure.
*
* \warning
* This function assumes that there is already enough space available in
* \c dst to hold all of the elements that will be copied over.
*/
static int
copy_indirect_accessed_array(struct gl_program_parameter_list *src,
struct gl_program_parameter_list *dst,
unsigned first, unsigned count)
{
const int base = dst->NumParameters;
unsigned i, j;
for (i = first; i < (first + count); i++) {
struct gl_program_parameter *curr = & src->Parameters[i];
if (curr->Type == PROGRAM_CONSTANT) {
j = dst->NumParameters;
} else {
for (j = 0; j < dst->NumParameters; j++) {
if (memcmp(dst->Parameters[j].StateIndexes, curr->StateIndexes,
sizeof(curr->StateIndexes)) == 0) {
return -1;
}
}
}
assert(j == dst->NumParameters);
/* copy src parameter [i] to dest parameter [j] */
memcpy(& dst->Parameters[j], curr,
sizeof(dst->Parameters[j]));
memcpy(dst->ParameterValues[j], src->ParameterValues[i],
sizeof(GLfloat) * 4);
/* Pointer to the string name was copied. Null-out src param name
* to prevent double free later.
*/
curr->Name = NULL;
dst->NumParameters++;
}
return base;
}
/**
* XXX description???
* \return GL_TRUE for success, GL_FALSE for failure
*/
GLboolean
_mesa_layout_parameters(struct asm_parser_state *state)
{
struct gl_program_parameter_list *layout;
struct asm_instruction *inst;
unsigned i;
layout =
_mesa_new_parameter_list_sized(state->prog->Parameters->NumParameters);
/* PASS 1: Move any parameters that are accessed indirectly from the
* original parameter list to the new parameter list.
*/
for (inst = state->inst_head; inst != NULL; inst = inst->next) {
for (i = 0; i < 3; i++) {
if (inst->SrcReg[i].Base.RelAddr) {
/* Only attempt to add the to the new parameter list once.
*/
if (!inst->SrcReg[i].Symbol->pass1_done) {
const int new_begin =
copy_indirect_accessed_array(state->prog->Parameters, layout,
inst->SrcReg[i].Symbol->param_binding_begin,
inst->SrcReg[i].Symbol->param_binding_length);
if (new_begin < 0) {
return GL_FALSE;
}
inst->SrcReg[i].Symbol->param_binding_begin = new_begin;
inst->SrcReg[i].Symbol->pass1_done = 1;
}
/* Previously the Index was just the offset from the parameter
* array. Now that the base of the parameter array is known, the
* index can be updated to its actual value.
*/
inst->Base.SrcReg[i] = inst->SrcReg[i].Base;
inst->Base.SrcReg[i].Index +=
inst->SrcReg[i].Symbol->param_binding_begin;
}
}
}
/* PASS 2: Move any parameters that are not accessed indirectly from the
* original parameter list to the new parameter list.
*/
for (inst = state->inst_head; inst != NULL; inst = inst->next) {
for (i = 0; i < 3; i++) {
const struct gl_program_parameter *p;
const int idx = inst->SrcReg[i].Base.Index;
unsigned swizzle = SWIZZLE_NOOP;
/* All relative addressed operands were processed on the first
* pass. Just skip them here.
*/
if (inst->SrcReg[i].Base.RelAddr) {
continue;
}
if ((inst->SrcReg[i].Base.File <= PROGRAM_VARYING )
|| (inst->SrcReg[i].Base.File >= PROGRAM_WRITE_ONLY)) {
continue;
}
inst->Base.SrcReg[i] = inst->SrcReg[i].Base;
p = & state->prog->Parameters->Parameters[idx];
switch (p->Type) {
case PROGRAM_CONSTANT: {
const gl_constant_value *const v =
state->prog->Parameters->ParameterValues[idx];
inst->Base.SrcReg[i].Index =
_mesa_add_unnamed_constant(layout, v, p->Size, & swizzle);
inst->Base.SrcReg[i].Swizzle =
_mesa_combine_swizzles(swizzle, inst->Base.SrcReg[i].Swizzle);
break;
}
case PROGRAM_STATE_VAR:
inst->Base.SrcReg[i].Index =
_mesa_add_state_reference(layout, p->StateIndexes);
break;
default:
break;
}
inst->SrcReg[i].Base.File = p->Type;
inst->Base.SrcReg[i].File = p->Type;
}
}
layout->StateFlags = state->prog->Parameters->StateFlags;
_mesa_free_parameter_list(state->prog->Parameters);
state->prog->Parameters = layout;
return GL_TRUE;
}
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