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r300/compiler: Don't pair output writes with GPR writes in the scheduler

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This commit is contained in:
Tom Stellard 2011-10-13 16:32:35 -07:00
parent 6fafb6beb7
commit 51fe9994bd
1 changed files with 7 additions and 0 deletions
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7
src/gallium/drivers/r300/compiler/radeon_pair_schedule.c
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@ -511,6 +511,13 @@ static int merge_instructions(struct rc_pair_instruction * rgb, struct rc_pair_i
return 0;
}
/* Writing output registers in the middle of shaders is slow, so
* we don't want to pair output writes with temp writes. */
if ((rgb->RGB.OutputWriteMask && !alpha->Alpha.OutputWriteMask)
|| (!rgb->RGB.OutputWriteMask && alpha->Alpha.OutputWriteMask)) {
return 0;
}
memcpy(&backup, rgb, sizeof(struct rc_pair_instruction));
if (destructive_merge_instructions(rgb, alpha))