forked from KolibriOS/kolibrios
381 lines
14 KiB
C
381 lines
14 KiB
C
/**************************************************************************
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*
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* Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
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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 TUNGSTEN GRAPHICS 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_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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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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/**
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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_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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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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src->Register.File == TGSI_FILE_INPUT &&
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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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}
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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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}
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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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for (reg = fulldecl->Range.First;
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reg <= fulldecl->Range.Last;
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reg++) {
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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_INPUT) {
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info->input_semantic_name[reg] = (ubyte)fulldecl->Semantic.Name;
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info->input_semantic_index[reg] = (ubyte)fulldecl->Semantic.Index;
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info->input_interpolate[reg] = (ubyte)fulldecl->Interp.Interpolate;
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info->input_centroid[reg] = (ubyte)fulldecl->Interp.Centroid;
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info->input_cylindrical_wrap[reg] = (ubyte)fulldecl->Interp.CylindricalWrap;
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info->num_inputs++;
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if (procType == TGSI_PROCESSOR_FRAGMENT &&
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fulldecl->Semantic.Name == TGSI_SEMANTIC_POSITION)
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info->reads_position = TRUE;
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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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unsigned semName = fulldecl->Semantic.Name;
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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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/*
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info->system_value_semantic_name[info->num_system_values++] =
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fulldecl->Semantic.Name;
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*/
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if (fulldecl->Semantic.Name == TGSI_SEMANTIC_INSTANCEID) {
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info->uses_instanceid = TRUE;
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}
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else if (fulldecl->Semantic.Name == TGSI_SEMANTIC_VERTEXID) {
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info->uses_vertexid = TRUE;
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} else if (fulldecl->Semantic.Name == TGSI_SEMANTIC_PRIMID) {
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info->uses_primid = 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)fulldecl->Semantic.Name;
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info->output_semantic_index[reg] = (ubyte)fulldecl->Semantic.Index;
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info->num_outputs++;
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if ((procType == TGSI_PROCESSOR_VERTEX || procType == TGSI_PROCESSOR_GEOMETRY) &&
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fulldecl->Semantic.Name == TGSI_SEMANTIC_CLIPDIST) {
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info->num_written_clipdistance += util_bitcount(fulldecl->Declaration.UsageMask);
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}
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if ((procType == TGSI_PROCESSOR_VERTEX || procType == TGSI_PROCESSOR_GEOMETRY) &&
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fulldecl->Semantic.Name == TGSI_SEMANTIC_CULLDIST) {
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info->num_written_culldistance += util_bitcount(fulldecl->Declaration.UsageMask);
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}
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/* extra info for special outputs */
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if (procType == TGSI_PROCESSOR_FRAGMENT &&
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fulldecl->Semantic.Name == TGSI_SEMANTIC_POSITION)
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info->writes_z = TRUE;
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if (procType == TGSI_PROCESSOR_FRAGMENT &&
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fulldecl->Semantic.Name == TGSI_SEMANTIC_STENCIL)
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info->writes_stencil = TRUE;
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if (procType == TGSI_PROCESSOR_VERTEX &&
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fulldecl->Semantic.Name == TGSI_SEMANTIC_EDGEFLAG) {
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info->writes_edgeflag = TRUE;
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}
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if (procType == TGSI_PROCESSOR_GEOMETRY &&
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fulldecl->Semantic.Name ==
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TGSI_SEMANTIC_VIEWPORT_INDEX) {
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info->writes_viewport_index = TRUE;
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}
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if (procType == TGSI_PROCESSOR_GEOMETRY &&
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fulldecl->Semantic.Name ==
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TGSI_SEMANTIC_LAYER) {
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info->writes_layer = TRUE;
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}
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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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info->properties[info->num_properties].name =
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fullprop->Property.PropertyName;
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memcpy(info->properties[info->num_properties].data,
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fullprop->u, 8 * sizeof(unsigned));;
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++info->num_properties;
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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_KIL] ||
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info->opcode_count[TGSI_OPCODE_KILP]);
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/* extract simple properties */
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for (i = 0; i < info->num_properties; ++i) {
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switch (info->properties[i].name) {
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case TGSI_PROPERTY_FS_COORD_ORIGIN:
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info->origin_lower_left = info->properties[i].data[0];
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break;
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case TGSI_PROPERTY_FS_COORD_PIXEL_CENTER:
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info->pixel_center_integer = info->properties[i].data[0];
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break;
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case TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS:
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info->color0_writes_all_cbufs = info->properties[i].data[0];
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break;
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case TGSI_PROPERTY_GS_INPUT_PRIM:
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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 = info->properties[i].data[0];
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int num_verts = u_vertices_per_prim(input_primitive);
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unsigned 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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break;
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default:
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;
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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]
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*
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*/
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boolean
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tgsi_is_passthrough_shader(const struct tgsi_token *tokens)
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{
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struct tgsi_parse_context parse;
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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_is_passthrough_shader()!\n");
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return FALSE;
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}
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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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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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struct tgsi_full_instruction *fullinst =
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&parse.FullToken.FullInstruction;
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const struct tgsi_full_src_register *src =
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&fullinst->Src[0];
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const struct tgsi_full_dst_register *dst =
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&fullinst->Dst[0];
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/* Do a whole bunch of checks for a simple move */
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if (fullinst->Instruction.Opcode != TGSI_OPCODE_MOV ||
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(src->Register.File != TGSI_FILE_INPUT &&
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src->Register.File != TGSI_FILE_SYSTEM_VALUE) ||
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dst->Register.File != TGSI_FILE_OUTPUT ||
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src->Register.Index != dst->Register.Index ||
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src->Register.Negate ||
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src->Register.Absolute ||
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src->Register.SwizzleX != TGSI_SWIZZLE_X ||
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src->Register.SwizzleY != TGSI_SWIZZLE_Y ||
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src->Register.SwizzleZ != TGSI_SWIZZLE_Z ||
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src->Register.SwizzleW != TGSI_SWIZZLE_W ||
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dst->Register.WriteMask != TGSI_WRITEMASK_XYZW)
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{
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tgsi_parse_free(&parse);
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return FALSE;
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}
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}
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break;
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case TGSI_TOKEN_TYPE_DECLARATION:
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/* fall-through */
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case TGSI_TOKEN_TYPE_IMMEDIATE:
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/* fall-through */
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case TGSI_TOKEN_TYPE_PROPERTY:
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/* fall-through */
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default:
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; /* no-op */
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}
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}
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tgsi_parse_free(&parse);
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/* if we get here, it's a pass-through shader */
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return TRUE;
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}
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