OpenHarmony/third_party_mesa3d
2
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

i965/fs: Allow saturate propagation to propagate negations into MADs.

Browse Source 
Allows us to transform

   mad      res  src0   src1   src2
   mov.sat  dst  -res

into

   mad.sat  dst  -src0 -src1   src2

instructions in affected programs: 3712 -> 3688 (-0.65%)
helped: 24

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
This commit is contained in:
Matt Turner
2015-02-10 17:45:28 -08:00
parent 65d3217cb0
commit 4009a9ead4
1 changed files with 4 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
src/mesa/drivers/dri/i965/brw_fs_saturate_propagation.cpp
View File

@@ -86,6 +86,10 @@ opt_saturate_propagation_local(fs_visitor *v, bblock_t *block)
if (scan_inst->opcode == BRW_OPCODE_MUL) {
scan_inst->src[0].negate = !scan_inst->src[0].negate;
inst->src[0].negate = false;
} else if (scan_inst->opcode == BRW_OPCODE_MAD) {
scan_inst->src[0].negate = !scan_inst->src[0].negate;
scan_inst->src[1].negate = !scan_inst->src[1].negate;
inst->src[0].negate = false;
} else if (scan_inst->opcode == BRW_OPCODE_ADD) {
if (scan_inst->src[1].file == IMM) {
if (!brw_negate_immediate(scan_inst->src[1].type,