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authorMatt Turner <[email protected]>2013-10-27 21:26:36 -0700
committerMatt Turner <[email protected]>2013-11-01 15:21:07 -0700
commit3c28b2c09f491bfa55dc9e5d7858a8b900c25432 (patch)
tree7c978542aa8a1029dd96959a57bf40b3cc9aa668 /src
parentca675b73d3ac2e1b57ec385c2c80b05b6382f6b6 (diff)
i965/fs: Optimize saturating SEL.G(E) with imm val <= 0.0f.
Only one program's instruction count is changed, but a shader in Tropics is also affected. instructions in affected programs: 326 -> 320 (-1.84%) Reviewed-by: Eric Anholt <[email protected]> Reviewed-by: Paul Berry <[email protected]>
Diffstat (limited to 'src')
-rw-r--r--src/mesa/drivers/dri/i965/brw_fs.cpp14
1 files changed, 14 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index 56284d94e0b..7064910281f 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -1897,6 +1897,20 @@ fs_visitor::opt_algebraic()
break;
}
break;
+ case BRW_CONDITIONAL_GE:
+ case BRW_CONDITIONAL_G:
+ switch (inst->src[1].type) {
+ case BRW_REGISTER_TYPE_F:
+ if (inst->src[1].imm.f <= 0.0f) {
+ inst->opcode = BRW_OPCODE_MOV;
+ inst->src[1] = reg_undef;
+ inst->conditional_mod = BRW_CONDITIONAL_NONE;
+ progress = true;
+ }
+ break;
+ default:
+ break;
+ }
default:
break;
}