https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87317
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hjl.tools at gmail dot com
--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
Try this:
https://github.com/hjl-tools/gcc/commit/a5e6fd272554f58136ba45bbdf9fd48553a72324
I got
[hjl@gnu-tools-1 gcc]$ cat x.c
#include <immintrin.h>
int f(void *ptr)
{
__m128i data = _mm_loadl_epi64((__m128i *)ptr);
data = _mm_cvtepu8_epi16(data);
return _mm_cvtsi128_si32(data);
}
[hjl@gnu-tools-1 gcc]$ ./xgcc -B./ -O2 -march=haswell x.c -S
cat [hjl@gnu-tools-1 gcc]$ cat x.s
.file "x.c"
.text
.p2align 4
.globl f
.type f, @function
f:
.LFB5178:
.cfi_startproc
vpmovzxbw (%rdi), %xmm0
vmovd %xmm0, %eax
ret
.cfi_endproc
.LFE5178:
.size f, .-f
.ident "GCC: (GNU) 9.0.0 20180916 (experimental)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-tools-1 gcc]$ cat y.c
#include <immintrin.h>
void f(void *dst, void *ptr)
{
__m128i data = _mm_cvtsi32_si128(*(int*)ptr);
data = _mm_cvtepu8_epi32(data);
_mm_storeu_si128((__m128i*)dst, data);
}
[hjl@gnu-tools-1 gcc]$ ./xgcc -B./ -O2 -march=haswell y.c -S
c[hjl@gnu-tools-1 gcc]$ cat y.s
.file "y.c"
.text
.p2align 4
.globl f
.type f, @function
f:
.LFB5178:
.cfi_startproc
vpmovzxbd (%rsi), %xmm0
vmovups %xmm0, (%rdi)
ret
.cfi_endproc
.LFE5178:
.size f, .-f
.ident "GCC: (GNU) 9.0.0 20180916 (experimental)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-tools-1 gcc]$
