| /************************************************************************** |
| * |
| * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas. |
| * All Rights Reserved. |
| * Copyright 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 TUNGSTEN GRAPHICS 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. |
| * |
| **************************************************************************/ |
| |
| /** |
| * TGSI program scan utility. |
| * Used to determine which registers and instructions are used by a shader. |
| * |
| * Authors: Brian Paul |
| */ |
| |
| |
| #include "util/u_math.h" |
| #include "tgsi/tgsi_build.h" |
| #include "tgsi/tgsi_parse.h" |
| #include "tgsi/tgsi_scan.h" |
| |
| |
| |
| |
| /** |
| * Scan the given TGSI shader to collect information such as number of |
| * registers used, special instructions used, etc. |
| * \return info the result of the scan |
| */ |
| void |
| tgsi_scan_shader(const struct tgsi_token *tokens, |
| struct tgsi_shader_info *info) |
| { |
| uint procType, i; |
| struct tgsi_parse_context parse; |
| |
| memset(info, 0, sizeof(*info)); |
| for (i = 0; i < TGSI_FILE_COUNT; i++) |
| info->file_max[i] = -1; |
| |
| /** |
| ** Setup to begin parsing input shader |
| **/ |
| if (tgsi_parse_init( &parse, tokens ) != TGSI_PARSE_OK) { |
| debug_printf("tgsi_parse_init() failed in tgsi_scan_shader()!\n"); |
| return; |
| } |
| procType = parse.FullHeader.Processor.Processor; |
| assert(procType == TGSI_PROCESSOR_FRAGMENT || |
| procType == TGSI_PROCESSOR_VERTEX || |
| procType == TGSI_PROCESSOR_GEOMETRY); |
| |
| |
| /** |
| ** Loop over incoming program tokens/instructions |
| */ |
| while( !tgsi_parse_end_of_tokens( &parse ) ) { |
| |
| info->num_tokens++; |
| |
| tgsi_parse_token( &parse ); |
| |
| switch( parse.FullToken.Token.Type ) { |
| case TGSI_TOKEN_TYPE_INSTRUCTION: |
| { |
| const struct tgsi_full_instruction *fullinst |
| = &parse.FullToken.FullInstruction; |
| |
| assert(fullinst->Instruction.Opcode < TGSI_OPCODE_LAST); |
| info->opcode_count[fullinst->Instruction.Opcode]++; |
| |
| /* special case: scan fragment shaders for use of the fog |
| * input/attribute. The X component is fog, the Y component |
| * is the front/back-face flag. |
| */ |
| if (procType == TGSI_PROCESSOR_FRAGMENT) { |
| uint i; |
| for (i = 0; i < fullinst->Instruction.NumSrcRegs; i++) { |
| const struct tgsi_full_src_register *src = |
| &fullinst->FullSrcRegisters[i]; |
| if (src->SrcRegister.File == TGSI_FILE_INPUT) { |
| const int ind = src->SrcRegister.Index; |
| if (info->input_semantic_name[ind] == TGSI_SEMANTIC_FOG) { |
| if (src->SrcRegister.SwizzleX == TGSI_SWIZZLE_X) { |
| info->uses_fogcoord = TRUE; |
| } |
| else if (src->SrcRegister.SwizzleX == TGSI_SWIZZLE_Y) { |
| info->uses_frontfacing = TRUE; |
| } |
| } |
| } |
| } |
| } |
| } |
| break; |
| |
| case TGSI_TOKEN_TYPE_DECLARATION: |
| { |
| const struct tgsi_full_declaration *fulldecl |
| = &parse.FullToken.FullDeclaration; |
| const uint file = fulldecl->Declaration.File; |
| uint reg; |
| for (reg = fulldecl->DeclarationRange.First; |
| reg <= fulldecl->DeclarationRange.Last; |
| reg++) { |
| |
| /* only first 32 regs will appear in this bitfield */ |
| info->file_mask[file] |= (1 << reg); |
| info->file_count[file]++; |
| info->file_max[file] = MAX2(info->file_max[file], (int)reg); |
| |
| if (file == TGSI_FILE_INPUT) { |
| info->input_semantic_name[reg] = (ubyte)fulldecl->Semantic.SemanticName; |
| info->input_semantic_index[reg] = (ubyte)fulldecl->Semantic.SemanticIndex; |
| info->input_interpolate[reg] = (ubyte)fulldecl->Declaration.Interpolate; |
| info->num_inputs++; |
| } |
| else if (file == TGSI_FILE_OUTPUT) { |
| info->output_semantic_name[reg] = (ubyte)fulldecl->Semantic.SemanticName; |
| info->output_semantic_index[reg] = (ubyte)fulldecl->Semantic.SemanticIndex; |
| info->num_outputs++; |
| } |
| |
| /* special case */ |
| if (procType == TGSI_PROCESSOR_FRAGMENT && |
| file == TGSI_FILE_OUTPUT && |
| fulldecl->Semantic.SemanticName == TGSI_SEMANTIC_POSITION) { |
| info->writes_z = TRUE; |
| } |
| } |
| } |
| break; |
| |
| case TGSI_TOKEN_TYPE_IMMEDIATE: |
| { |
| uint reg = info->immediate_count++; |
| uint file = TGSI_FILE_IMMEDIATE; |
| |
| info->file_mask[file] |= (1 << reg); |
| info->file_count[file]++; |
| info->file_max[file] = MAX2(info->file_max[file], (int)reg); |
| } |
| break; |
| |
| default: |
| assert( 0 ); |
| } |
| } |
| |
| info->uses_kill = (info->opcode_count[TGSI_OPCODE_KIL] || |
| info->opcode_count[TGSI_OPCODE_KILP]); |
| |
| tgsi_parse_free (&parse); |
| } |
| |
| |
| |
| /** |
| * Check if the given shader is a "passthrough" shader consisting of only |
| * 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->FullSrcRegisters[0]; |
| const struct tgsi_full_dst_register *dst = |
| &fullinst->FullDstRegisters[0]; |
| |
| /* Do a whole bunch of checks for a simple move */ |
| if (fullinst->Instruction.Opcode != TGSI_OPCODE_MOV || |
| src->SrcRegister.File != TGSI_FILE_INPUT || |
| dst->DstRegister.File != TGSI_FILE_OUTPUT || |
| src->SrcRegister.Index != dst->DstRegister.Index || |
| |
| src->SrcRegister.Negate || |
| src->SrcRegisterExtMod.Negate || |
| src->SrcRegisterExtMod.Absolute || |
| src->SrcRegisterExtMod.Scale2X || |
| src->SrcRegisterExtMod.Bias || |
| src->SrcRegisterExtMod.Complement || |
| |
| src->SrcRegister.SwizzleX != TGSI_SWIZZLE_X || |
| src->SrcRegister.SwizzleY != TGSI_SWIZZLE_Y || |
| src->SrcRegister.SwizzleZ != TGSI_SWIZZLE_Z || |
| src->SrcRegister.SwizzleW != TGSI_SWIZZLE_W || |
| |
| dst->DstRegister.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 */ |
| default: |
| ; /* no-op */ |
| } |
| } |
| |
| tgsi_parse_free(&parse); |
| |
| /* if we get here, it's a pass-through shader */ |
| return TRUE; |
| } |