Module: Mesa
Branch: master
Commit: 4f3826117957b5ac1554b833af33d342360f655a
URL:
http://cgit.freedesktop.org/mesa/mesa/commit/?id=4f3826117957b5ac1554b833af33d342360f655a
Author: Marek Olšák <mar...@gmail.com>
Date: Tue Mar 8 06:37:50 2011 +0100
r300/compiler: improve the detection of constants for constant folding
Now the expression V==0 generates one instruction instead of two.
---
.../drivers/dri/r300/compiler/radeon_optimize.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/src/mesa/drivers/dri/r300/compiler/radeon_optimize.c
b/src/mesa/drivers/dri/r300/compiler/radeon_optimize.c
index 5caff91..3915cb4 100644
--- a/src/mesa/drivers/dri/r300/compiler/radeon_optimize.c
+++ b/src/mesa/drivers/dri/r300/compiler/radeon_optimize.c
@@ -312,6 +312,13 @@ static void constant_folding(struct radeon_compiler * c,
struct rc_instruction *
struct rc_src_register newsrc;
int have_real_reference;
+ if (inst->U.I.SrcReg[src].Swizzle == RC_SWIZZLE_1111 ||
+ inst->U.I.SrcReg[src].Swizzle == RC_SWIZZLE_0000 ||
+ inst->U.I.SrcReg[src].Swizzle == RC_SWIZZLE_HHHH) {
+ inst->U.I.SrcReg[src].File = RC_FILE_NONE;
+ continue;
+ }
+
if (inst->U.I.SrcReg[src].File != RC_FILE_CONSTANT ||
inst->U.I.SrcReg[src].RelAddr ||
inst->U.I.SrcReg[src].Index >= c->Program.Constants.Count)
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