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vc4: Refuse to merge instructions involving 32-bit immediate loads.

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An immediate load overwrites the mul and add operations, so you can't
merge with them.
This commit is contained in:
Eric Anholt 2014-12-09 16:34:37 -08:00
parent 25db8729dc
commit cff8c96a0d
1 changed files with 5 additions and 0 deletions
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5
src/gallium/drivers/vc4/vc4_qpu.c
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@ -356,6 +356,11 @@ qpu_merge_inst(uint64_t a, uint64_t b)
if (qpu_num_sf_accesses(a) && qpu_num_sf_accesses(b))
return 0;
if (QPU_GET_FIELD(a, QPU_SIG) == QPU_SIG_LOAD_IMM ||
QPU_GET_FIELD(b, QPU_SIG) == QPU_SIG_LOAD_IMM) {
return 0;
}
ok = ok && merge_fields(&merge, a, b, QPU_SIG_MASK,
QPU_SET_FIELD(QPU_SIG_NONE, QPU_SIG));