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i386: Add missing vector truncate patterns [PR92658].

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Add missing insn patterns for v2si -> v2hi/v2qi and v2hi-> v2qi vector
truncate.

gcc/ChangeLog:

	PR target/92658
	* config/i386/mmx.md (truncv2hiv2qi2): New define_insn.
	(truncv2si<mode>2): Ditto.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/pr92658-avx512bw-trunc-2.c: New test.
This commit is contained in:
liuhongt 2023-06-01 15:08:02 +08:00
parent 64ca6aa74b
commit 4933704086
2 changed files with 48 additions and 0 deletions
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21
gcc/config/i386/mmx.md
View file

@ -3667,6 +3667,27 @@
DONE;
})
(define_insn "truncv2hiv2qi2"
[(set (match_operand:V2QI 0 "register_operand" "=v")
(truncate:V2QI
(match_operand:V2HI 1 "register_operand" "v")))]
"TARGET_AVX512VL && TARGET_AVX512BW"
"vpmovwb\t{%1, %0|%0, %1}"
[(set_attr "type" "ssemov")
(set_attr "prefix" "evex")
(set_attr "mode" "TI")])
(define_mode_iterator V2QI_V2HI [V2QI V2HI])
(define_insn "truncv2si<mode>2"
[(set (match_operand:V2QI_V2HI 0 "register_operand" "=v")
(truncate:V2QI_V2HI
(match_operand:V2SI 1 "register_operand" "v")))]
"TARGET_AVX512VL && TARGET_MMX_WITH_SSE"
"vpmovd<mmxvecsize>\t{%1, %0|%0, %1}"
[(set_attr "type" "ssemov")
(set_attr "prefix" "evex")
(set_attr "mode" "TI")])
;; Pack/unpack vector modes
(define_mode_attr mmxpackmode
[(V4HI "V8QI") (V2SI "V4HI")])

27
gcc/testsuite/gcc.target/i386/pr92658-avx512bw-trunc-2.c Normal file
View file

@ -0,0 +1,27 @@
/* PR target/92658 */
/* { dg-do compile } */
/* { dg-options "-O2 -mavx512bw -mavx512vl" } */
/* { dg-final { scan-assembler-times "vpmovwb" 1 } } */
/* { dg-final { scan-assembler-times "vpmovdb" 1 { target { ! ia32 } } } } */
/* { dg-final { scan-assembler-times "vpmovdw" 1 { target { ! ia32 } } } } */
void
foo (int* __restrict a, char* b)
{
b[0] = a[0];
b[1] = a[1];
}
void
foo2 (short* __restrict a, char* b)
{
b[0] = a[0];
b[1] = a[1];
}
void
foo3 (int* __restrict a, short* b)
{
b[0] = a[0];
b[1] = a[1];
}