https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111333
--- Comment #1 from Hongtao.liu <crazylht at gmail dot com> ---
fmulcph/fmaddcph is commutative for operands[1] and operands[2], but
fcmulcph/fcmaddcph is not, since it's Complex conjugate operations.
Below change fixes the issue.
diff --git a/gcc/config/i386/sse.md b/gcc/config/i386/sse.md
index 6d3ae8dea0c..833546c5228 100644
--- a/gcc/config/i386/sse.md
+++ b/gcc/config/i386/sse.md
@@ -6480,6 +6480,14 @@ (define_int_attr complexpairopname
[(UNSPEC_COMPLEX_FMA_PAIR "fmaddc")
(UNSPEC_COMPLEX_FCMA_PAIR "fcmaddc")])
+(define_int_attr int_comm
+ [(UNSPEC_COMPLEX_FMA "%")
+ (UNSPEC_COMPLEX_FMA_PAIR "%")
+ (UNSPEC_COMPLEX_FCMA "")
+ (UNSPEC_COMPLEX_FCMA_PAIR "")
+ (UNSPEC_COMPLEX_FMUL "%")
+ (UNSPEC_COMPLEX_FCMUL "")])
+
(define_int_attr conj_op
[(UNSPEC_COMPLEX_FMA "")
(UNSPEC_COMPLEX_FCMA "_conj")
@@ -6593,7 +6601,7 @@ (define_expand "cmla<conj_op><mode>4"
(define_insn "fma_<complexopname>_<mode><sdc_maskz_name><round_name>"
[(set (match_operand:VHF_AVX512VL 0 "register_operand" "=&v")
(unspec:VHF_AVX512VL
- [(match_operand:VHF_AVX512VL 1 "<round_nimm_predicate>" "%v")
+ [(match_operand:VHF_AVX512VL 1 "<round_nimm_predicate>"
"<int_comm>v")
(match_operand:VHF_AVX512VL 2 "<round_nimm_predicate>"
"<round_constraint>")
(match_operand:VHF_AVX512VL 3 "<round_nimm_predicate>" "0")]
UNSPEC_COMPLEX_F_C_MA))]
@@ -6658,7 +6666,7 @@ (define_insn_and_split
"fma_<complexopname>_<mode>_fma_zero"
(define_insn "fma_<complexpairopname>_<mode>_pair"
[(set (match_operand:VF1_AVX512VL 0 "register_operand" "=&v")
(unspec:VF1_AVX512VL
- [(match_operand:VF1_AVX512VL 1 "vector_operand" "%v")
+ [(match_operand:VF1_AVX512VL 1 "vector_operand" "<int_comm>v")
(match_operand:VF1_AVX512VL 2 "bcst_vector_operand" "vmBr")
(match_operand:VF1_AVX512VL 3 "vector_operand" "0")]
UNSPEC_COMPLEX_F_C_MA_PAIR))]
@@ -6727,7 +6735,7 @@ (define_insn
"<avx512>_<complexopname>_<mode>_mask<round_name>"
[(set (match_operand:VHF_AVX512VL 0 "register_operand" "=&v")
(vec_merge:VHF_AVX512VL
(unspec:VHF_AVX512VL
- [(match_operand:VHF_AVX512VL 1 "nonimmediate_operand" "%v")
+ [(match_operand:VHF_AVX512VL 1 "nonimmediate_operand"
"<int_comm>v")
(match_operand:VHF_AVX512VL 2 "nonimmediate_operand"
"<round_constraint>")
(match_operand:VHF_AVX512VL 3 "register_operand" "0")]
UNSPEC_COMPLEX_F_C_MA)
@@ -6752,7 +6760,7 @@ (define_expand "cmul<conj_op><mode>3"
(define_insn "<avx512>_<complexopname>_<mode><maskc_name><round_name>"
[(set (match_operand:VHF_AVX512VL 0 "register_operand" "=&v")
(unspec:VHF_AVX512VL
- [(match_operand:VHF_AVX512VL 1 "nonimmediate_operand" "%v")
+ [(match_operand:VHF_AVX512VL 1 "nonimmediate_operand"
"<int_comm>v")
(match_operand:VHF_AVX512VL 2 "nonimmediate_operand"
"<round_constraint>")]
UNSPEC_COMPLEX_F_C_MUL))]
"TARGET_AVX512FP16 && <round_mode512bit_condition>"
