diff options
| author | Eric Anholt <[email protected]> | 2013-06-07 17:58:18 -0700 |
|---|---|---|
| committer | Eric Anholt <[email protected]> | 2013-06-10 14:04:24 -0700 |
| commit | d28e285d41bbb482384fb2174c92b9f63aa1175f (patch) | |
| tree | 51c01dc0cbe8f6acda430e36f0a9d164bd59fde3 /src/mesa | |
| parent | 263a7e4cd992738814575b04d2de24ca0a0ad08a (diff) | |
i965/vs: Allow copy propagation into MUL/MACH.
This is a trivial port of 1d6ead38042cc0d1e667d8ff55937c1e32d108b1 from
the FS.
No significant performance difference on trex (misplaced the data, but it
was about n=20).
Reviewed-by: Kenneth Graunke <[email protected]>
Reviewed-by: Matt Turner <[email protected]>
Diffstat (limited to 'src/mesa')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp b/src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp index 1a667ebf2b2..64f6ccc98f7 100644 --- a/src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp +++ b/src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp @@ -95,6 +95,7 @@ try_constant_propagation(vec4_instruction *inst, int arg, src_reg *values[4]) inst->src[arg] = value; return true; + case BRW_OPCODE_MACH: case BRW_OPCODE_MUL: case BRW_OPCODE_ADD: if (arg == 1) { @@ -102,9 +103,10 @@ try_constant_propagation(vec4_instruction *inst, int arg, src_reg *values[4]) return true; } else if (arg == 0 && inst->src[1].file != IMM) { /* Fit this constant in by commuting the operands. Exception: we - * can't do this for 32-bit integer MUL because it's asymmetric. + * can't do this for 32-bit integer MUL/MACH because it's asymmetric. */ - if (inst->opcode == BRW_OPCODE_MUL && + if ((inst->opcode == BRW_OPCODE_MUL || + inst->opcode == BRW_OPCODE_MACH) && (inst->src[1].type == BRW_REGISTER_TYPE_D || inst->src[1].type == BRW_REGISTER_TYPE_UD)) break; |