150 lines
4.3 KiB
C
150 lines
4.3 KiB
C
/**************************************************************************
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*
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* Copyright 2010 Luca Barbieri
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a 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, sublicense, 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
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#include "util/u_debug.h"
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#include "pipe/p_shader_tokens.h"
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#include "tgsi/tgsi_parse.h"
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#include "tgsi/tgsi_scan.h"
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#include "util/u_linkage.h"
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/* we must only record the registers that are actually used, not just declared */
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static INLINE boolean
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util_semantic_set_test_and_set(struct util_semantic_set *set, unsigned value)
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{
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unsigned mask = 1 << (value % (sizeof(long) * 8));
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unsigned long *p = &set->masks[value / (sizeof(long) * 8)];
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unsigned long v = *p & mask;
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*p |= mask;
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return !!v;
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}
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unsigned
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util_semantic_set_from_program_file(struct util_semantic_set *set, const struct tgsi_token *tokens, enum tgsi_file_type file)
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{
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struct tgsi_shader_info info;
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struct tgsi_parse_context parse;
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unsigned count = 0;
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ubyte *semantic_name;
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ubyte *semantic_index;
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tgsi_scan_shader(tokens, &info);
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if(file == TGSI_FILE_INPUT)
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{
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semantic_name = info.input_semantic_name;
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semantic_index = info.input_semantic_index;
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}
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else if(file == TGSI_FILE_OUTPUT)
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{
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semantic_name = info.output_semantic_name;
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semantic_index = info.output_semantic_index;
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}
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else
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{
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assert(0);
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semantic_name = NULL;
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semantic_index = NULL;
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}
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tgsi_parse_init(&parse, tokens);
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memset(set->masks, 0, sizeof(set->masks));
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while(!tgsi_parse_end_of_tokens(&parse))
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{
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tgsi_parse_token(&parse);
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if(parse.FullToken.Token.Type == TGSI_TOKEN_TYPE_INSTRUCTION)
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{
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const struct tgsi_full_instruction *finst = &parse.FullToken.FullInstruction;
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unsigned i;
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for(i = 0; i < finst->Instruction.NumDstRegs; ++i)
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{
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if(finst->Dst[i].Register.File == file)
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{
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unsigned idx = finst->Dst[i].Register.Index;
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if(semantic_name[idx] == TGSI_SEMANTIC_GENERIC)
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{
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if(!util_semantic_set_test_and_set(set, semantic_index[idx]))
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++count;
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}
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}
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}
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for(i = 0; i < finst->Instruction.NumSrcRegs; ++i)
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{
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if(finst->Src[i].Register.File == file)
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{
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unsigned idx = finst->Src[i].Register.Index;
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if(semantic_name[idx] == TGSI_SEMANTIC_GENERIC)
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{
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if(!util_semantic_set_test_and_set(set, semantic_index[idx]))
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++count;
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}
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}
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}
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}
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}
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tgsi_parse_free(&parse);
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return count;
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}
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#define UTIL_SEMANTIC_SET_FOR_EACH(i, set) for(i = 0; i < 256; ++i) if(set->masks[i / (sizeof(long) * 8)] & (1 << (i % (sizeof(long) * 8))))
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void
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util_semantic_layout_from_set(unsigned char *layout, const struct util_semantic_set *set, unsigned efficient_slots, unsigned num_slots)
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{
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int first = -1;
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int last = -1;
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unsigned i;
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memset(layout, 0xff, num_slots);
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UTIL_SEMANTIC_SET_FOR_EACH(i, set)
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{
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if(first < 0)
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first = i;
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last = i;
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}
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if (last < (int) efficient_slots)
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{
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UTIL_SEMANTIC_SET_FOR_EACH(i, set)
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layout[i] = i;
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}
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else if ((last - first) < (int) efficient_slots)
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{
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UTIL_SEMANTIC_SET_FOR_EACH(i, set)
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layout[i - first] = i;
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}
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else
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{
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unsigned idx = 0;
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UTIL_SEMANTIC_SET_FOR_EACH(i, set)
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layout[idx++] = i;
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}
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}
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