diff options
| author | Tom Stellard <[email protected]> | 2010-09-28 23:10:09 -0700 |
|---|---|---|
| committer | Tom Stellard <[email protected]> | 2010-09-28 23:52:41 -0700 |
| commit | b27a809266bd664cd101fcfdf20886cc2b7df787 (patch) | |
| tree | bd23791ebb8dd9bfc663f03b5ed4128875b65daa /src/mesa | |
| parent | 1b76dde0cd90509da0acc631f6599fb6f7fe676d (diff) | |
r300/compiler: Don't merge instructions that write output regs and ALU result
https://bugs.freedesktop.org/show_bug.cgi?id=30415
NOTE: This is a candidate for the 7.9 branch.
Diffstat (limited to 'src/mesa')
| -rw-r--r-- | src/mesa/drivers/dri/r300/compiler/radeon_pair_schedule.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/r300/compiler/radeon_pair_schedule.c b/src/mesa/drivers/dri/r300/compiler/radeon_pair_schedule.c index a33b2fde7b5..38bae26f3c1 100644 --- a/src/mesa/drivers/dri/r300/compiler/radeon_pair_schedule.c +++ b/src/mesa/drivers/dri/r300/compiler/radeon_pair_schedule.c @@ -475,6 +475,12 @@ static int merge_instructions(struct rc_pair_instruction * rgb, struct rc_pair_i { struct rc_pair_instruction backup; + /*Instructions can't write output registers and ALU result at the + * same time. */ + if ((rgb->WriteALUResult && alpha->Alpha.OutputWriteMask) + || (rgb->RGB.OutputWriteMask && alpha->WriteALUResult)) { + return 0; + } memcpy(&backup, rgb, sizeof(struct rc_pair_instruction)); if (destructive_merge_instructions(rgb, alpha)) |