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-rw-r--r--src/gallium/auxiliary/tgsi/tgsi_exec.c50
-rw-r--r--src/gallium/auxiliary/tgsi/tgsi_exec.h4
2 files changed, 40 insertions, 14 deletions
diff --git a/src/gallium/auxiliary/tgsi/tgsi_exec.c b/src/gallium/auxiliary/tgsi/tgsi_exec.c
index 5cb322a5fa2..259894e72e0 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_exec.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_exec.c
@@ -62,6 +62,9 @@
#define FAST_MATH 1
+/** for tgsi_full_instruction::Flags */
+#define SOA_DEPENDENCY_FLAG 0x1
+
#define TILE_TOP_LEFT 0
#define TILE_TOP_RIGHT 1
#define TILE_BOTTOM_LEFT 2
@@ -182,7 +185,7 @@ print_temp(const struct tgsi_exec_machine *mach, uint index)
* MOV t3, t2;
* The second instruction will have the wrong value for t0 if executed as-is.
*/
-static boolean
+boolean
tgsi_check_soa_dependencies(const struct tgsi_full_instruction *inst)
{
uint i, chan;
@@ -328,19 +331,24 @@ tgsi_exec_machine_bind_shader(
* sizeof(struct tgsi_full_instruction));
maxInstructions += 10;
}
- memcpy(instructions + numInstructions,
- &parse.FullToken.FullInstruction,
- sizeof(instructions[0]));
-#if 0
if (tgsi_check_soa_dependencies(&parse.FullToken.FullInstruction)) {
- debug_printf("SOA dependency in instruction:\n");
- tgsi_dump_instruction(&parse.FullToken.FullInstruction,
- numInstructions);
+ uint opcode = parse.FullToken.FullInstruction.Instruction.Opcode;
+ parse.FullToken.FullInstruction.Flags = SOA_DEPENDENCY_FLAG;
+ /* XXX we only handle SOA dependencies properly for MOV/SWZ
+ * at this time!
+ */
+ if (opcode != TGSI_OPCODE_MOV && opcode != TGSI_OPCODE_SWZ) {
+ debug_printf("Warning: SOA dependency in instruction"
+ " is not handled:\n");
+ tgsi_dump_instruction(&parse.FullToken.FullInstruction,
+ numInstructions);
+ }
}
-#else
- (void) tgsi_check_soa_dependencies;
-#endif
+
+ memcpy(instructions + numInstructions,
+ &parse.FullToken.FullInstruction,
+ sizeof(instructions[0]));
numInstructions++;
break;
@@ -2018,9 +2026,23 @@ exec_instruction(
case TGSI_OPCODE_MOV:
case TGSI_OPCODE_SWZ:
- FOR_EACH_ENABLED_CHANNEL( *inst, chan_index ) {
- FETCH( &r[0], 0, chan_index );
- STORE( &r[0], 0, chan_index );
+ if (inst->Flags & SOA_DEPENDENCY_FLAG) {
+ /* Do all fetches into temp regs, then do all stores to avoid
+ * intermediate/accidental clobbering. This could be done all the
+ * time for MOV but for other instructions we'll need more temps...
+ */
+ FOR_EACH_ENABLED_CHANNEL( *inst, chan_index ) {
+ FETCH( &r[chan_index], 0, chan_index );
+ }
+ FOR_EACH_ENABLED_CHANNEL( *inst, chan_index ) {
+ STORE( &r[chan_index], 0, chan_index );
+ }
+ }
+ else {
+ FOR_EACH_ENABLED_CHANNEL( *inst, chan_index ) {
+ FETCH( &r[0], 0, chan_index );
+ STORE( &r[0], 0, chan_index );
+ }
}
break;
diff --git a/src/gallium/auxiliary/tgsi/tgsi_exec.h b/src/gallium/auxiliary/tgsi/tgsi_exec.h
index da22baad3ef..182e5e228b5 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_exec.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_exec.h
@@ -272,6 +272,10 @@ void
tgsi_exec_machine_free_data(struct tgsi_exec_machine *mach);
+boolean
+tgsi_check_soa_dependencies(const struct tgsi_full_instruction *inst);
+
+
static INLINE void
tgsi_set_kill_mask(struct tgsi_exec_machine *mach, unsigned mask)
{