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authorTom Stellard <[email protected]>2010-11-11 01:13:01 -0800
committerTom Stellard <[email protected]>2010-11-21 18:48:31 -0800
commit23f577dbd491bd045c47c6378bd23748255eb045 (patch)
tree5fc59481e1719eaed89bfa4340c3ae00aa6c3ffc /src/mesa/drivers
parentd668659003d0164f0d9c805f4127ff8eb64f0624 (diff)
r300/compiler: Ignore alpha dest register when replicating the result
When the result of the alpha instruction is being replicated to the RGB destination register, we do not need to use alpha's destination register. This fixes an invalid "Too many hardware temporaries used" error in the case where a transcendent operation writes to a temporary register greater than max_temp_regs. NOTE: This is a candidate for the 7.9 branch.
Diffstat (limited to 'src/mesa/drivers')
-rw-r--r--src/mesa/drivers/dri/r300/compiler/radeon_pair_translate.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/mesa/drivers/dri/r300/compiler/radeon_pair_translate.c b/src/mesa/drivers/dri/r300/compiler/radeon_pair_translate.c
index c549be52183..fc05366f50e 100644
--- a/src/mesa/drivers/dri/r300/compiler/radeon_pair_translate.c
+++ b/src/mesa/drivers/dri/r300/compiler/radeon_pair_translate.c
@@ -280,9 +280,12 @@ static void set_pair_instruction(struct r300_fragment_program_compiler *c,
pair->RGB.DestIndex = inst->DstReg.Index;
pair->RGB.WriteMask |= inst->DstReg.WriteMask & RC_MASK_XYZ;
}
+
if (needalpha) {
- pair->Alpha.DestIndex = inst->DstReg.Index;
pair->Alpha.WriteMask |= GET_BIT(inst->DstReg.WriteMask, 3);
+ if (pair->Alpha.WriteMask) {
+ pair->Alpha.DestIndex = inst->DstReg.Index;
+ }
}
}