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intel/compiler: skip MAD algebraic optimization for half-float or mixed mode
author
Iago Toral Quiroga
<itoral@igalia.com>
Tue, 12 Feb 2019 08:34:10 +0000
(09:34 +0100)
committer
Juan A. Suarez Romero
<jasuarez@igalia.com>
Thu, 18 Apr 2019 09:05:18 +0000
(11:05 +0200)
It is very likely that this optimzation is never useful and we'll probably
just end up removing it, so let's not bother adding more cases to it for
now.
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
src/intel/compiler/brw_fs.cpp
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diff --git
a/src/intel/compiler/brw_fs.cpp
b/src/intel/compiler/brw_fs.cpp
index
186275b
..
14d10a6
100644
(file)
--- a/
src/intel/compiler/brw_fs.cpp
+++ b/
src/intel/compiler/brw_fs.cpp
@@
-2693,6
+2693,10
@@
fs_visitor::opt_algebraic()
}
break;
case BRW_OPCODE_MAD:
+ if (inst->src[0].type != BRW_REGISTER_TYPE_F ||
+ inst->src[1].type != BRW_REGISTER_TYPE_F ||
+ inst->src[2].type != BRW_REGISTER_TYPE_F)
+ break;
if (inst->src[1].is_one()) {
inst->opcode = BRW_OPCODE_ADD;
inst->src[1] = inst->src[2];