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pan/bi: Add ATOM_C1 promotion check 

Optimizes atomic counters.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Tested-by: Icecream95 <ixn@disroot.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9105>
This commit is contained in:
Alyssa Rosenzweig 2021-02-17 13:51:55 -05:00 committed by Marge Bot
parent b9d277f644
commit 8358321801
1 changed files with 31 additions and 0 deletions
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31
src/panfrost/bifrost/bifrost_compile.c
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@ -714,6 +714,37 @@ bi_atom_opc_for_nir(nir_op op)
}
}
/* Optimized unary atomics are available with an implied #1 argument */
static bool
bi_promote_atom_c1(enum bi_atom_opc op, bi_index arg, enum bi_atom_opc *out)
{
/* Check we have a compatible constant */
if (arg.type != BI_INDEX_CONSTANT)
return false;
if (!(arg.value == 1 || (arg.value == -1 && op == BI_ATOM_OPC_AADD)))
return false;
/* Check for a compatible operation */
switch (op) {
case BI_ATOM_OPC_AADD:
*out = (arg.value == 1) ? BI_ATOM_OPC_AINC : BI_ATOM_OPC_ADEC;
return true;
case BI_ATOM_OPC_ASMAX:
*out = BI_ATOM_OPC_ASMAX1;
return true;
case BI_ATOM_OPC_AUMAX:
*out = BI_ATOM_OPC_AUMAX1;
return true;
case BI_ATOM_OPC_AOR:
*out = BI_ATOM_OPC_AOR1;
return true;
default:
return false;
}
}
/* gl_FragCoord.xy = u16_to_f32(R59.xy) + 0.5
* gl_FragCoord.z = ld_vary(fragz)
* gl_FragCoord.w = ld_vary(fragw)