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vc4: Don't bother saturating the dst color for blending.

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Since we just pulled it out of the destination as 8-bit unorm, we know
it's in [0, 1] already.

shader-db:
total instructions in shared programs: 100040 -> 98208 (-1.83%)
instructions in affected programs:     14084 -> 12252 (-13.01%)
This commit is contained in:
Eric Anholt
2015-07-31 17:08:46 -07:00
parent cc8fb29046
commit 63eac5de8f
1 changed files with 2 additions and 8 deletions
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src/gallium/drivers/vc4/vc4_program.c
+2 -8
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@@ -1130,14 +1130,8 @@ vc4_blend(struct vc4_compile *c, struct qreg *result,
return;
}
struct qreg clamped_src[4];
struct qreg clamped_dst[4];
for (int i = 0; i < 4; i++) {
clamped_src[i] = qir_SAT(c, src_color[i]);
clamped_dst[i] = qir_SAT(c, dst_color[i]);
}
src_color = clamped_src;
dst_color = clamped_dst;
for (int i = 0; i < 4; i++)
src_color[i] = qir_SAT(c, src_color[i]);
struct qreg src_blend[4], dst_blend[4];
for (int i = 0; i < 3; i++) {