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pan/bi: Don't schedule <32-bit IMATH to FMA 

The ops don't exist.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4890>
This commit is contained in:
Alyssa Rosenzweig 2020-05-04 14:40:09 -04:00 committed by Marge Bot
parent 2925e88996
commit 1799435df0
1 changed files with 9 additions and 0 deletions
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9
src/panfrost/bifrost/bi_schedule.c
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@ -109,6 +109,14 @@ bi_icmp(bi_instruction *ins)
return ic && (ins->type == BI_CMP);
}
/* No 8/16-bit IADD/ISUB on FMA */
static bool
bi_imath_small(bi_instruction *ins)
{
bool sz = nir_alu_type_get_type_size(ins->src_types[0]) < 32;
return sz && (ins->type == BI_IMATH);
}
/* Lowers FMOV to ADD #0, since FMOV doesn't exist on the h/w and this is the
* latest time it's sane to lower (it's useful to distinguish before, but we'll
* need this handle during scheduling to ensure the ports get modeled
@ -159,6 +167,7 @@ bi_schedule(bi_context *ctx)
can_fma &= !bi_ambiguous_abs(ins);
can_fma &= !bi_icmp(ins);
can_fma &= !bi_imath_small(ins);
assert(can_fma || can_add);