diff options
Diffstat (limited to 'mesalib/src/gallium/auxiliary/util/u_linkage.c')
| -rw-r--r-- | mesalib/src/gallium/auxiliary/util/u_linkage.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_linkage.c b/mesalib/src/gallium/auxiliary/util/u_linkage.c new file mode 100644 index 000000000..89d67accc --- /dev/null +++ b/mesalib/src/gallium/auxiliary/util/u_linkage.c @@ -0,0 +1,149 @@ +/**************************************************************************
+ *
+ * Copyright 2010 Luca Barbieri
+ *
+ * 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, sublicense, 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 NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) 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.
+ *
+ **************************************************************************/
+
+#include "util/u_debug.h"
+#include "pipe/p_shader_tokens.h"
+#include "tgsi/tgsi_parse.h"
+#include "tgsi/tgsi_scan.h"
+#include "util/u_linkage.h"
+
+/* we must only record the registers that are actually used, not just declared */
+static INLINE boolean
+util_semantic_set_test_and_set(struct util_semantic_set *set, unsigned value)
+{
+ unsigned mask = 1 << (value % (sizeof(long) * 8));
+ unsigned long *p = &set->masks[value / (sizeof(long) * 8)];
+ unsigned long v = *p & mask;
+ *p |= mask;
+ return !!v;
+}
+
+unsigned
+util_semantic_set_from_program_file(struct util_semantic_set *set, const struct tgsi_token *tokens, enum tgsi_file_type file)
+{
+ struct tgsi_shader_info info;
+ struct tgsi_parse_context parse;
+ unsigned count = 0;
+ ubyte *semantic_name;
+ ubyte *semantic_index;
+
+ tgsi_scan_shader(tokens, &info);
+
+ if(file == TGSI_FILE_INPUT)
+ {
+ semantic_name = info.input_semantic_name;
+ semantic_index = info.input_semantic_index;
+ }
+ else if(file == TGSI_FILE_OUTPUT)
+ {
+ semantic_name = info.output_semantic_name;
+ semantic_index = info.output_semantic_index;
+ }
+ else
+ {
+ assert(0);
+ semantic_name = NULL;
+ semantic_index = NULL;
+ }
+
+ tgsi_parse_init(&parse, tokens);
+
+ memset(set->masks, 0, sizeof(set->masks));
+ while(!tgsi_parse_end_of_tokens(&parse))
+ {
+ tgsi_parse_token(&parse);
+
+ if(parse.FullToken.Token.Type == TGSI_TOKEN_TYPE_INSTRUCTION)
+ {
+ const struct tgsi_full_instruction *finst = &parse.FullToken.FullInstruction;
+ unsigned i;
+ for(i = 0; i < finst->Instruction.NumDstRegs; ++i)
+ {
+ if(finst->Dst[i].Register.File == file)
+ {
+ unsigned idx = finst->Dst[i].Register.Index;
+ if(semantic_name[idx] == TGSI_SEMANTIC_GENERIC)
+ {
+ if(!util_semantic_set_test_and_set(set, semantic_index[idx]))
+ ++count;
+ }
+ }
+ }
+
+ for(i = 0; i < finst->Instruction.NumSrcRegs; ++i)
+ {
+ if(finst->Src[i].Register.File == file)
+ {
+ unsigned idx = finst->Src[i].Register.Index;
+ if(semantic_name[idx] == TGSI_SEMANTIC_GENERIC)
+ {
+ if(!util_semantic_set_test_and_set(set, semantic_index[idx]))
+ ++count;
+ }
+ }
+ }
+ }
+ }
+ tgsi_parse_free(&parse);
+
+ return count;
+}
+
+#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))))
+
+void
+util_semantic_layout_from_set(unsigned char *layout, const struct util_semantic_set *set, unsigned efficient_slots, unsigned num_slots)
+{
+ int first = -1;
+ int last = -1;
+ unsigned i;
+
+ memset(layout, 0xff, num_slots);
+
+ UTIL_SEMANTIC_SET_FOR_EACH(i, set)
+ {
+ if(first < 0)
+ first = i;
+ last = i;
+ }
+
+ if(last < efficient_slots)
+ {
+ UTIL_SEMANTIC_SET_FOR_EACH(i, set)
+ layout[i] = i;
+ }
+ else if((last - first) < efficient_slots)
+ {
+ UTIL_SEMANTIC_SET_FOR_EACH(i, set)
+ layout[i - first] = i;
+ }
+ else
+ {
+ unsigned idx = 0;
+ UTIL_SEMANTIC_SET_FOR_EACH(i, set)
+ layout[idx++] = i;
+ }
+}
|