diff options
Diffstat (limited to 'src/gallium/auxiliary/tgsi/tgsi_exec.c')
| -rw-r--r-- | src/gallium/auxiliary/tgsi/tgsi_exec.c | 50 |
1 files changed, 36 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; |