diff options
Diffstat (limited to 'src/gallium/auxiliary/tgsi/tgsi_scan.c')
| -rw-r--r-- | src/gallium/auxiliary/tgsi/tgsi_scan.c | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.c b/src/gallium/auxiliary/tgsi/tgsi_scan.c new file mode 100644 index 00000000000..be4870a4983 --- /dev/null +++ b/src/gallium/auxiliary/tgsi/tgsi_scan.c @@ -0,0 +1,226 @@ +/************************************************************************** + * + * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas. + * 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" + + + + +/** + */ +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: + { + struct tgsi_full_instruction *fullinst + = &parse.FullToken.FullInstruction; + + assert(fullinst->Instruction.Opcode < TGSI_OPCODE_LAST); + info->opcode_count[fullinst->Instruction.Opcode]++; + } + break; + + case TGSI_TOKEN_TYPE_DECLARATION: + { + struct tgsi_full_declaration *fulldecl + = &parse.FullToken.FullDeclaration; + uint file = fulldecl->Declaration.File; + uint i; + for (i = fulldecl->DeclarationRange.First; + i <= fulldecl->DeclarationRange.Last; + i++) { + + /* only first 32 regs will appear in this bitfield */ + info->file_mask[file] |= (1 << i); + info->file_count[file]++; + info->file_max[file] = MAX2(info->file_max[file], (int)i); + + if (file == TGSI_FILE_INPUT) { + info->input_semantic_name[i] = (ubyte)fulldecl->Semantic.SemanticName; + info->input_semantic_index[i] = (ubyte)fulldecl->Semantic.SemanticIndex; + info->num_inputs++; + } + + if (file == TGSI_FILE_OUTPUT) { + info->output_semantic_name[i] = (ubyte)fulldecl->Semantic.SemanticName; + info->output_semantic_index[i] = (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: + info->immediate_count++; + break; + + default: + assert( 0 ); + } + } + + assert( info->file_max[TGSI_FILE_INPUT] + 1 == info->num_inputs ); + assert( info->file_max[TGSI_FILE_OUTPUT] + 1 == info->num_outputs ); + + 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 || + + src->SrcRegisterExtSwz.ExtSwizzleX != TGSI_EXTSWIZZLE_X || + src->SrcRegisterExtSwz.ExtSwizzleY != TGSI_EXTSWIZZLE_Y || + src->SrcRegisterExtSwz.ExtSwizzleZ != TGSI_EXTSWIZZLE_Z || + src->SrcRegisterExtSwz.ExtSwizzleW != TGSI_EXTSWIZZLE_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; +} |