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vc4: Allow unpack_8[abcd]_f's src to stay in r4.

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I had QPU emit code to do it, but forgot to flag the register class.

total instructions in shared programs: 97974 -> 97590 (-0.39%)
instructions in affected programs:     25291 -> 24907 (-1.52%)
This commit is contained in:
Eric Anholt
2015-08-18 22:07:47 -07:00
parent 8b36d107fd
commit c800fef2e2
1 changed files with 15 additions and 1 deletions
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src/gallium/drivers/vc4/vc4_register_allocate.c
+15 -1
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@@ -279,7 +279,21 @@ vc4_register_allocate(struct vc4_context *vc4, struct vc4_compile *c)
}
if (qir_src_needs_a_file(inst)) {
class_bits[inst->src[0].index] &= CLASS_BIT_A;
switch (inst->op) {
case QOP_UNPACK_8A_F:
case QOP_UNPACK_8B_F:
case QOP_UNPACK_8C_F:
case QOP_UNPACK_8D_F:
/* Special case: these can be done as R4
* unpacks, as well.
*/
class_bits[inst->src[0].index] &= (CLASS_BIT_A |
CLASS_BIT_R4);
break;
default:
class_bits[inst->src[0].index] &= CLASS_BIT_A;
break;
}
}
ip++;
}