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551 lines
21 KiB
551 lines
21 KiB
/**************************************************************************
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*
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* Copyright 2008 VMware, Inc.
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* All Rights Reserved.
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* Copyright 2008 VMware, Inc. All rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/**
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* TGSI program scan utility.
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* Used to determine which registers and instructions are used by a shader.
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*
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* Authors: Brian Paul
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*/
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#include "util/u_debug.h"
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#include "util/u_math.h"
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#include "util/u_memory.h"
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#include "util/u_prim.h"
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#include "tgsi/tgsi_parse.h"
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#include "tgsi/tgsi_util.h"
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#include "tgsi/tgsi_scan.h"
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/**
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* Scan the given TGSI shader to collect information such as number of
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* registers used, special instructions used, etc.
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* \return info the result of the scan
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*/
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void
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tgsi_scan_shader(const struct tgsi_token *tokens,
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struct tgsi_shader_info *info)
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{
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uint procType, i;
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struct tgsi_parse_context parse;
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unsigned current_depth = 0;
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memset(info, 0, sizeof(*info));
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for (i = 0; i < TGSI_FILE_COUNT; i++)
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info->file_max[i] = -1;
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for (i = 0; i < ARRAY_SIZE(info->const_file_max); i++)
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info->const_file_max[i] = -1;
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info->properties[TGSI_PROPERTY_GS_INVOCATIONS] = 1;
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/**
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** Setup to begin parsing input shader
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**/
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if (tgsi_parse_init( &parse, tokens ) != TGSI_PARSE_OK) {
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debug_printf("tgsi_parse_init() failed in tgsi_scan_shader()!\n");
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return;
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}
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procType = parse.FullHeader.Processor.Processor;
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assert(procType == TGSI_PROCESSOR_FRAGMENT ||
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procType == TGSI_PROCESSOR_VERTEX ||
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procType == TGSI_PROCESSOR_GEOMETRY ||
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procType == TGSI_PROCESSOR_TESS_CTRL ||
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procType == TGSI_PROCESSOR_TESS_EVAL ||
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procType == TGSI_PROCESSOR_COMPUTE);
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info->processor = procType;
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/**
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** Loop over incoming program tokens/instructions
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*/
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while( !tgsi_parse_end_of_tokens( &parse ) ) {
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info->num_tokens++;
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tgsi_parse_token( &parse );
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switch( parse.FullToken.Token.Type ) {
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case TGSI_TOKEN_TYPE_INSTRUCTION:
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{
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const struct tgsi_full_instruction *fullinst
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= &parse.FullToken.FullInstruction;
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uint i;
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assert(fullinst->Instruction.Opcode < TGSI_OPCODE_LAST);
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info->opcode_count[fullinst->Instruction.Opcode]++;
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switch (fullinst->Instruction.Opcode) {
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case TGSI_OPCODE_IF:
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case TGSI_OPCODE_UIF:
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case TGSI_OPCODE_BGNLOOP:
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current_depth++;
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info->max_depth = MAX2(info->max_depth, current_depth);
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break;
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case TGSI_OPCODE_ENDIF:
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case TGSI_OPCODE_ENDLOOP:
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current_depth--;
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break;
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default:
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break;
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}
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if (fullinst->Instruction.Opcode == TGSI_OPCODE_INTERP_CENTROID ||
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fullinst->Instruction.Opcode == TGSI_OPCODE_INTERP_OFFSET ||
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fullinst->Instruction.Opcode == TGSI_OPCODE_INTERP_SAMPLE) {
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const struct tgsi_full_src_register *src0 = &fullinst->Src[0];
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unsigned input;
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if (src0->Register.Indirect && src0->Indirect.ArrayID)
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input = info->input_array_first[src0->Indirect.ArrayID];
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else
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input = src0->Register.Index;
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/* For the INTERP opcodes, the interpolation is always
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* PERSPECTIVE unless LINEAR is specified.
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*/
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switch (info->input_interpolate[input]) {
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case TGSI_INTERPOLATE_COLOR:
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case TGSI_INTERPOLATE_CONSTANT:
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case TGSI_INTERPOLATE_PERSPECTIVE:
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switch (fullinst->Instruction.Opcode) {
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case TGSI_OPCODE_INTERP_CENTROID:
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info->uses_persp_opcode_interp_centroid = true;
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break;
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case TGSI_OPCODE_INTERP_OFFSET:
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info->uses_persp_opcode_interp_offset = true;
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break;
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case TGSI_OPCODE_INTERP_SAMPLE:
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info->uses_persp_opcode_interp_sample = true;
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break;
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}
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break;
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case TGSI_INTERPOLATE_LINEAR:
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switch (fullinst->Instruction.Opcode) {
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case TGSI_OPCODE_INTERP_CENTROID:
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info->uses_linear_opcode_interp_centroid = true;
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break;
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case TGSI_OPCODE_INTERP_OFFSET:
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info->uses_linear_opcode_interp_offset = true;
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break;
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case TGSI_OPCODE_INTERP_SAMPLE:
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info->uses_linear_opcode_interp_sample = true;
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break;
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}
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break;
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}
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}
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if (fullinst->Instruction.Opcode >= TGSI_OPCODE_F2D &&
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fullinst->Instruction.Opcode <= TGSI_OPCODE_DSSG)
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info->uses_doubles = true;
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for (i = 0; i < fullinst->Instruction.NumSrcRegs; i++) {
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const struct tgsi_full_src_register *src =
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&fullinst->Src[i];
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int ind = src->Register.Index;
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/* Mark which inputs are effectively used */
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if (src->Register.File == TGSI_FILE_INPUT) {
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unsigned usage_mask;
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usage_mask = tgsi_util_get_inst_usage_mask(fullinst, i);
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if (src->Register.Indirect) {
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for (ind = 0; ind < info->num_inputs; ++ind) {
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info->input_usage_mask[ind] |= usage_mask;
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}
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} else {
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assert(ind >= 0);
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assert(ind < PIPE_MAX_SHADER_INPUTS);
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info->input_usage_mask[ind] |= usage_mask;
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}
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if (procType == TGSI_PROCESSOR_FRAGMENT &&
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info->reads_position &&
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src->Register.Index == 0 &&
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(src->Register.SwizzleX == TGSI_SWIZZLE_Z ||
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src->Register.SwizzleY == TGSI_SWIZZLE_Z ||
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src->Register.SwizzleZ == TGSI_SWIZZLE_Z ||
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src->Register.SwizzleW == TGSI_SWIZZLE_Z)) {
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info->reads_z = TRUE;
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}
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}
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/* check for indirect register reads */
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if (src->Register.Indirect) {
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info->indirect_files |= (1 << src->Register.File);
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info->indirect_files_read |= (1 << src->Register.File);
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}
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if (src->Register.Dimension && src->Dimension.Indirect) {
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info->dimension_indirect_files |= (1 << src->Register.File);
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}
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/* MSAA samplers */
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if (src->Register.File == TGSI_FILE_SAMPLER) {
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assert(fullinst->Instruction.Texture);
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assert((unsigned)src->Register.Index < ARRAY_SIZE(info->is_msaa_sampler));
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if (fullinst->Instruction.Texture &&
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(fullinst->Texture.Texture == TGSI_TEXTURE_2D_MSAA ||
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fullinst->Texture.Texture == TGSI_TEXTURE_2D_ARRAY_MSAA)) {
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info->is_msaa_sampler[src->Register.Index] = TRUE;
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}
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}
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}
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/* check for indirect register writes */
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for (i = 0; i < fullinst->Instruction.NumDstRegs; i++) {
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const struct tgsi_full_dst_register *dst = &fullinst->Dst[i];
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if (dst->Register.Indirect) {
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info->indirect_files |= (1 << dst->Register.File);
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info->indirect_files_written |= (1 << dst->Register.File);
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}
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if (dst->Register.Dimension && dst->Dimension.Indirect)
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info->dimension_indirect_files |= (1 << dst->Register.File);
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}
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info->num_instructions++;
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}
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break;
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case TGSI_TOKEN_TYPE_DECLARATION:
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{
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const struct tgsi_full_declaration *fulldecl
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= &parse.FullToken.FullDeclaration;
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const uint file = fulldecl->Declaration.File;
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uint reg;
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if (fulldecl->Declaration.Array) {
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unsigned array_id = fulldecl->Array.ArrayID;
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switch (file) {
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case TGSI_FILE_INPUT:
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assert(array_id < ARRAY_SIZE(info->input_array_first));
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info->input_array_first[array_id] = fulldecl->Range.First;
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info->input_array_last[array_id] = fulldecl->Range.Last;
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break;
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case TGSI_FILE_OUTPUT:
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assert(array_id < ARRAY_SIZE(info->output_array_first));
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info->output_array_first[array_id] = fulldecl->Range.First;
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info->output_array_last[array_id] = fulldecl->Range.Last;
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break;
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}
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info->array_max[file] = MAX2(info->array_max[file], array_id);
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}
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for (reg = fulldecl->Range.First;
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reg <= fulldecl->Range.Last;
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reg++) {
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unsigned semName = fulldecl->Semantic.Name;
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unsigned semIndex =
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fulldecl->Semantic.Index + (reg - fulldecl->Range.First);
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/* only first 32 regs will appear in this bitfield */
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info->file_mask[file] |= (1 << reg);
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info->file_count[file]++;
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info->file_max[file] = MAX2(info->file_max[file], (int)reg);
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if (file == TGSI_FILE_CONSTANT) {
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int buffer = 0;
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if (fulldecl->Declaration.Dimension)
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buffer = fulldecl->Dim.Index2D;
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info->const_file_max[buffer] =
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MAX2(info->const_file_max[buffer], (int)reg);
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}
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else if (file == TGSI_FILE_INPUT) {
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info->input_semantic_name[reg] = (ubyte) semName;
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info->input_semantic_index[reg] = (ubyte) semIndex;
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info->input_interpolate[reg] = (ubyte)fulldecl->Interp.Interpolate;
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info->input_interpolate_loc[reg] = (ubyte)fulldecl->Interp.Location;
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info->input_cylindrical_wrap[reg] = (ubyte)fulldecl->Interp.CylindricalWrap;
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info->num_inputs++;
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/* Only interpolated varyings. Don't include POSITION.
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* Don't include integer varyings, because they are not
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* interpolated.
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*/
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if (semName == TGSI_SEMANTIC_GENERIC ||
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semName == TGSI_SEMANTIC_TEXCOORD ||
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semName == TGSI_SEMANTIC_COLOR ||
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semName == TGSI_SEMANTIC_BCOLOR ||
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semName == TGSI_SEMANTIC_FOG ||
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semName == TGSI_SEMANTIC_CLIPDIST ||
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semName == TGSI_SEMANTIC_CULLDIST) {
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switch (fulldecl->Interp.Interpolate) {
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case TGSI_INTERPOLATE_COLOR:
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case TGSI_INTERPOLATE_PERSPECTIVE:
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switch (fulldecl->Interp.Location) {
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case TGSI_INTERPOLATE_LOC_CENTER:
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info->uses_persp_center = true;
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break;
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case TGSI_INTERPOLATE_LOC_CENTROID:
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info->uses_persp_centroid = true;
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break;
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case TGSI_INTERPOLATE_LOC_SAMPLE:
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info->uses_persp_sample = true;
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break;
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}
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break;
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case TGSI_INTERPOLATE_LINEAR:
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switch (fulldecl->Interp.Location) {
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case TGSI_INTERPOLATE_LOC_CENTER:
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info->uses_linear_center = true;
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break;
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case TGSI_INTERPOLATE_LOC_CENTROID:
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info->uses_linear_centroid = true;
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break;
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case TGSI_INTERPOLATE_LOC_SAMPLE:
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info->uses_linear_sample = true;
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break;
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}
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break;
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/* TGSI_INTERPOLATE_CONSTANT doesn't do any interpolation. */
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}
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}
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if (semName == TGSI_SEMANTIC_PRIMID)
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info->uses_primid = TRUE;
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else if (procType == TGSI_PROCESSOR_FRAGMENT) {
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if (semName == TGSI_SEMANTIC_POSITION)
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info->reads_position = TRUE;
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else if (semName == TGSI_SEMANTIC_FACE)
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info->uses_frontface = TRUE;
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}
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}
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else if (file == TGSI_FILE_SYSTEM_VALUE) {
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unsigned index = fulldecl->Range.First;
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info->system_value_semantic_name[index] = semName;
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info->num_system_values = MAX2(info->num_system_values,
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index + 1);
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if (semName == TGSI_SEMANTIC_INSTANCEID) {
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info->uses_instanceid = TRUE;
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}
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else if (semName == TGSI_SEMANTIC_VERTEXID) {
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info->uses_vertexid = TRUE;
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}
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else if (semName == TGSI_SEMANTIC_VERTEXID_NOBASE) {
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info->uses_vertexid_nobase = TRUE;
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}
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else if (semName == TGSI_SEMANTIC_BASEVERTEX) {
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info->uses_basevertex = TRUE;
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}
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else if (semName == TGSI_SEMANTIC_PRIMID) {
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info->uses_primid = TRUE;
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} else if (semName == TGSI_SEMANTIC_INVOCATIONID) {
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info->uses_invocationid = TRUE;
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}
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}
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else if (file == TGSI_FILE_OUTPUT) {
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info->output_semantic_name[reg] = (ubyte) semName;
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info->output_semantic_index[reg] = (ubyte) semIndex;
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info->num_outputs++;
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if (semName == TGSI_SEMANTIC_COLOR)
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info->colors_written |= 1 << semIndex;
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if (procType == TGSI_PROCESSOR_VERTEX ||
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procType == TGSI_PROCESSOR_GEOMETRY ||
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procType == TGSI_PROCESSOR_TESS_CTRL ||
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procType == TGSI_PROCESSOR_TESS_EVAL) {
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if (semName == TGSI_SEMANTIC_VIEWPORT_INDEX) {
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info->writes_viewport_index = TRUE;
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}
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else if (semName == TGSI_SEMANTIC_LAYER) {
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info->writes_layer = TRUE;
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}
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else if (semName == TGSI_SEMANTIC_PSIZE) {
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info->writes_psize = TRUE;
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}
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else if (semName == TGSI_SEMANTIC_CLIPVERTEX) {
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info->writes_clipvertex = TRUE;
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}
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}
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if (procType == TGSI_PROCESSOR_FRAGMENT) {
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if (semName == TGSI_SEMANTIC_POSITION) {
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info->writes_z = TRUE;
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}
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else if (semName == TGSI_SEMANTIC_STENCIL) {
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info->writes_stencil = TRUE;
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}
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}
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if (procType == TGSI_PROCESSOR_VERTEX) {
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if (semName == TGSI_SEMANTIC_EDGEFLAG) {
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info->writes_edgeflag = TRUE;
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}
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}
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} else if (file == TGSI_FILE_SAMPLER) {
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info->samplers_declared |= 1 << reg;
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}
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}
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}
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break;
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case TGSI_TOKEN_TYPE_IMMEDIATE:
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{
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uint reg = info->immediate_count++;
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uint file = TGSI_FILE_IMMEDIATE;
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info->file_mask[file] |= (1 << reg);
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info->file_count[file]++;
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info->file_max[file] = MAX2(info->file_max[file], (int)reg);
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}
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break;
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case TGSI_TOKEN_TYPE_PROPERTY:
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{
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const struct tgsi_full_property *fullprop
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= &parse.FullToken.FullProperty;
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unsigned name = fullprop->Property.PropertyName;
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unsigned value = fullprop->u[0].Data;
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assert(name < ARRAY_SIZE(info->properties));
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info->properties[name] = value;
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switch (name) {
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case TGSI_PROPERTY_NUM_CLIPDIST_ENABLED:
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info->num_written_clipdistance = value;
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info->clipdist_writemask |= (1 << value) - 1;
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break;
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case TGSI_PROPERTY_NUM_CULLDIST_ENABLED:
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info->num_written_culldistance = value;
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info->culldist_writemask |= (1 << value) - 1;
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break;
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}
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}
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break;
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default:
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assert( 0 );
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}
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}
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info->uses_kill = (info->opcode_count[TGSI_OPCODE_KILL_IF] ||
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info->opcode_count[TGSI_OPCODE_KILL]);
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/* The dimensions of the IN decleration in geometry shader have
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* to be deduced from the type of the input primitive.
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*/
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if (procType == TGSI_PROCESSOR_GEOMETRY) {
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unsigned input_primitive =
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info->properties[TGSI_PROPERTY_GS_INPUT_PRIM];
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int num_verts = u_vertices_per_prim(input_primitive);
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int j;
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info->file_count[TGSI_FILE_INPUT] = num_verts;
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info->file_max[TGSI_FILE_INPUT] =
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MAX2(info->file_max[TGSI_FILE_INPUT], num_verts - 1);
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for (j = 0; j < num_verts; ++j) {
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info->file_mask[TGSI_FILE_INPUT] |= (1 << j);
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}
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}
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tgsi_parse_free (&parse);
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}
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/**
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* Check if the given shader is a "passthrough" shader consisting of only
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* MOV instructions of the form: MOV OUT[n], IN[n]
|
|
*
|
|
*/
|
|
boolean
|
|
tgsi_is_passthrough_shader(const struct tgsi_token *tokens)
|
|
{
|
|
struct tgsi_parse_context parse;
|
|
|
|
/**
|
|
** Setup to begin parsing input shader
|
|
**/
|
|
if (tgsi_parse_init(&parse, tokens) != TGSI_PARSE_OK) {
|
|
debug_printf("tgsi_parse_init() failed in tgsi_is_passthrough_shader()!\n");
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
** Loop over incoming program tokens/instructions
|
|
*/
|
|
while (!tgsi_parse_end_of_tokens(&parse)) {
|
|
|
|
tgsi_parse_token(&parse);
|
|
|
|
switch (parse.FullToken.Token.Type) {
|
|
case TGSI_TOKEN_TYPE_INSTRUCTION:
|
|
{
|
|
struct tgsi_full_instruction *fullinst =
|
|
&parse.FullToken.FullInstruction;
|
|
const struct tgsi_full_src_register *src =
|
|
&fullinst->Src[0];
|
|
const struct tgsi_full_dst_register *dst =
|
|
&fullinst->Dst[0];
|
|
|
|
/* Do a whole bunch of checks for a simple move */
|
|
if (fullinst->Instruction.Opcode != TGSI_OPCODE_MOV ||
|
|
(src->Register.File != TGSI_FILE_INPUT &&
|
|
src->Register.File != TGSI_FILE_SYSTEM_VALUE) ||
|
|
dst->Register.File != TGSI_FILE_OUTPUT ||
|
|
src->Register.Index != dst->Register.Index ||
|
|
|
|
src->Register.Negate ||
|
|
src->Register.Absolute ||
|
|
|
|
src->Register.SwizzleX != TGSI_SWIZZLE_X ||
|
|
src->Register.SwizzleY != TGSI_SWIZZLE_Y ||
|
|
src->Register.SwizzleZ != TGSI_SWIZZLE_Z ||
|
|
src->Register.SwizzleW != TGSI_SWIZZLE_W ||
|
|
|
|
dst->Register.WriteMask != TGSI_WRITEMASK_XYZW)
|
|
{
|
|
tgsi_parse_free(&parse);
|
|
return FALSE;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case TGSI_TOKEN_TYPE_DECLARATION:
|
|
/* fall-through */
|
|
case TGSI_TOKEN_TYPE_IMMEDIATE:
|
|
/* fall-through */
|
|
case TGSI_TOKEN_TYPE_PROPERTY:
|
|
/* fall-through */
|
|
default:
|
|
; /* no-op */
|
|
}
|
|
}
|
|
|
|
tgsi_parse_free(&parse);
|
|
|
|
/* if we get here, it's a pass-through shader */
|
|
return TRUE;
|
|
}
|
|
|