From 4f3826117957b5ac1554b833af33d342360f655a Mon Sep 17 00:00:00 2001 From: =?utf8?q?Marek=20Ol=C5=A1=C3=A1k?= Date: Tue, 8 Mar 2011 06:37:50 +0100 Subject: [PATCH] r300/compiler: improve the detection of constants for constant folding Now the expression V==0 generates one instruction instead of two. --- src/mesa/drivers/dri/r300/compiler/radeon_optimize.c | 7 +++++++ 1 file changed, 7 insertions(+) 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) -- 2.7.4