diff options
| author | Eric Anholt <eric@anholt.net> | 2015-10-24 17:04:49 -0700 |
|---|---|---|
| committer | Eric Anholt <eric@anholt.net> | 2015-10-24 17:55:22 -0700 |
| commit | ae1d3322ccfd4758614167f4c6087d8acabe3cc5 (patch) | |
| tree | 4a977a1429625f52eae8be98c78f5146e700d0ab /src/gallium/drivers/vc4 | |
| parent | f09ed63f4342846e361242233162799140674d5f (diff) | |
vc4: Take advantage of the 8888 pack function in pack_unorm_4x8.
One instruction instead of four, and it turns out you do this a lot for
the Over operator.
total uniforms in shared programs: 32168 -> 32087 (-0.25%)
uniforms in affected programs: 318 -> 237 (-25.47%)
total instructions in shared programs: 89830 -> 89472 (-0.40%)
instructions in affected programs: 6434 -> 6076 (-5.56%)
Diffstat (limited to 'src/gallium/drivers/vc4')
| -rw-r--r-- | src/gallium/drivers/vc4/vc4_program.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/gallium/drivers/vc4/vc4_program.c b/src/gallium/drivers/vc4/vc4_program.c index 5d7564b46d5..a48dad804e2 100644 --- a/src/gallium/drivers/vc4/vc4_program.c +++ b/src/gallium/drivers/vc4/vc4_program.c @@ -738,6 +738,20 @@ ntq_emit_pack_unorm_4x8(struct vc4_compile *c, nir_alu_instr *instr) vec4 = nir_instr_as_alu(instr->src[0].src.ssa->parent_instr); } + /* If the pack is replicating the same channel 4 times, use the 8888 + * pack flag. This is common for blending using the alpha + * channel. + */ + if (instr->src[0].swizzle[0] == instr->src[0].swizzle[1] && + instr->src[0].swizzle[0] == instr->src[0].swizzle[2] && + instr->src[0].swizzle[0] == instr->src[0].swizzle[3]) { + struct qreg *dest = ntq_get_dest(c, &instr->dest.dest); + *dest = qir_PACK_8888_F(c, + ntq_get_src(c, instr->src[0].src, + instr->src[0].swizzle[0])); + return; + } + for (int i = 0; i < 4; i++) { int swiz = instr->src[0].swizzle[i]; struct qreg src; |