[RFC PATCH] i386: Add V2SFmode FMA insn patterns [PR95046]
Uros Bizjak
ubizjak@gmail.com
Mon May 11 19:52:31 GMT 2020
Attached patch implements V2SFmode FMA insn patterns. Patched compiler
vectorizes FMA, FMS and FNMA instructions, but for some reason fails
to vectorize FNMS.
I have double checked that the insn pattern is correct, and now I'm
all out of ideas what could be wrong with the pattern, still ignored
by the vectorizer. -fno-vect-cost-model does not help so it's time to
ask the experts...
gcc/ChangeLog:
2020-05-11 Uroš Bizjak <ubizjak@gmail.com>
PR target/95046
* config/i386/mmx.md (fmav2sf4): New insn pattern.
(fmsv2sf4): Ditto.
(fnmav2sf4): Ditto.
(fnmsv2sf4): Ditto.
testsuite/ChangeLog:
2020-05-11 Uroš Bizjak <ubizjak@gmail.com>
PR target/95046
* gcc.target/i386/pr95046-2.c: New test.
Otherwise, the patch is bootstrapped and regression tested on
x86_64-linux-gnu {,-m32}.
Uros.
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diff --git a/gcc/config/i386/mmx.md b/gcc/config/i386/mmx.md
index a8f603b94f8..0024ce761d7 100644
--- a/gcc/config/i386/mmx.md
+++ b/gcc/config/i386/mmx.md
@@ -345,6 +345,70 @@
(set_attr "prefix" "*,orig,vex")
(set_attr "mode" "V2SF,V4SF,V4SF")])
+(define_insn "fmav2sf4"
+ [(set (match_operand:V2SF 0 "register_operand" "=v,v,x")
+ (fma:V2SF
+ (match_operand:V2SF 1 "register_operand" "%0,v,x")
+ (match_operand:V2SF 2 "register_operand" "v,v,x")
+ (match_operand:V2SF 3 "register_operand" "v,0,x")))]
+ "(TARGET_FMA || TARGET_FMA4) && TARGET_MMX_WITH_SSE"
+ "@
+ vfmadd132ps\t{%2, %3, %0|%0, %3, %2}
+ vfmadd231ps\t{%2, %1, %0|%0, %1, %2}
+ vfmaddps\t{%3, %2, %1, %0|%0, %1, %2, %3}"
+ [(set_attr "isa" "fma,fma,fma4")
+ (set_attr "type" "ssemuladd")
+ (set_attr "mode" "V4SF")])
+
+(define_insn "fmsv2sf4"
+ [(set (match_operand:V2SF 0 "register_operand" "=v,v,x")
+ (fma:V2SF
+ (match_operand:V2SF 1 "register_operand" "%0,v,x")
+ (match_operand:V2SF 2 "register_operand" "v,v,x")
+ (neg:V2SF
+ (match_operand:V2SF 3 "register_operand" "v,0,x"))))]
+ "(TARGET_FMA || TARGET_FMA4) && TARGET_MMX_WITH_SSE"
+ "@
+ vfmsub132ps\t{%2, %3, %0|%0, %3, %2}
+ vfmsub231ps\t{%2, %1, %0|%0, %1, %2}
+ vfmsubps\t{%3, %2, %1, %0|%0, %1, %2, %3}"
+ [(set_attr "isa" "fma,fma,fma4")
+ (set_attr "type" "ssemuladd")
+ (set_attr "mode" "V4SF")])
+
+(define_insn "fnmav2sf4"
+ [(set (match_operand:V2SF 0 "register_operand" "=v,v,x")
+ (fma:V2SF
+ (neg:V2SF
+ (match_operand:V2SF 1 "register_operand" "%0,v,x"))
+ (match_operand:V2SF 2 "register_operand" "v,v,x")
+ (match_operand:V2SF 3 "register_operand" "v,0,x")))]
+ "(TARGET_FMA || TARGET_FMA4) && TARGET_MMX_WITH_SSE"
+ "@
+ vfnmadd132ps\t{%2, %3, %0|%0, %3, %2}
+ vfnmadd231ps\t{%2, %1, %0|%0, %1, %2}
+ vfnmaddps\t{%3, %2, %1, %0|%0, %1, %2, %3}"
+ [(set_attr "isa" "fma,fma,fma4")
+ (set_attr "type" "ssemuladd")
+ (set_attr "mode" "V4SF")])
+
+(define_insn "fnmsv2sf4"
+ [(set (match_operand:V2SF 0 "register_operand" "=v,v,x")
+ (fma:V2SF
+ (neg:V2SF
+ (match_operand:V2SF 1 "register_operand" "%0,v,x"))
+ (match_operand:V2SF 2 "register_operand" "v,v,x")
+ (neg:V2SF
+ (match_operand:V2SF 3 "register_operand" "v,0,x"))))]
+ "(TARGET_FMA || TARGET_FMA4) && TARGET_MMX_WITH_SSE"
+ "@
+ vfnmsub132ps\t{%2, %3, %0|%0, %3, %2}
+ vfnmsub231ps\t{%2, %1, %0|%0, %1, %2}
+ vfnmsubps\t{%3, %2, %1, %0|%0, %1, %2, %3}"
+ [(set_attr "isa" "fma,fma,fma4")
+ (set_attr "type" "ssemuladd")
+ (set_attr "mode" "V4SF")])
+
(define_expand "mmx_<code>v2sf3"
[(set (match_operand:V2SF 0 "register_operand")
(smaxmin:V2SF
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