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/**************************************************************************
*
* 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 "tgsi_scan.h"
#include "tgsi/util/tgsi_parse.h"
#include "tgsi/util/tgsi_build.h"
/**
*/
void
tgsi_scan_shader(const struct tgsi_token *tokens,
struct tgsi_shader_info *info)
{
uint procType;
struct tgsi_parse_context parse;
memset(info, 0, sizeof(*info));
/**
** 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 ) ) {
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->u.DeclarationRange.First;
i <= fulldecl->u.DeclarationRange.Last;
i++) {
info->file_mask[file] |= (1 << i);
info->file_count[file]++;
/* 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 );
}
}
tgsi_parse_free (&parse);
}
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