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r300/compiler: fix swizzle lowering with a presubtract source operand

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If a source operand has a non-native swizzle (e.g. the KIL instruction
cannot have a swizzle other than .xyzw), the lowering pass uses one or more
MOV instructions to move the operand to an intermediate temporary with
native swizzles.

This commit fixes that the presubtract information was lost during
the lowering.

NOTE: This is a candidate for both the 7.9 and 7.10 branches.
(cherry picked from commit d0990db6bd)
This commit is contained in:
Marek Olšák 2010-12-11 13:22:19 +01:00
parent 4b19941399
commit 0a8ad737e7
1 changed files with 1 additions and 0 deletions
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src/mesa/drivers/dri/r300/compiler/radeon_dataflow_swizzles.c
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@ -56,6 +56,7 @@ static void rewrite_source(struct radeon_compiler * c,
mov->U.I.DstReg.Index = tempreg;
mov->U.I.DstReg.WriteMask = split.Phase[phase];
mov->U.I.SrcReg[0] = inst->U.I.SrcReg[src];
mov->U.I.PreSub = inst->U.I.PreSub;
phase_refmask = 0;
for(unsigned int chan = 0; chan < 4; ++chan) {