[Bug target/43175] New: __builtin_ia32_vec_perm_v4si doesn't work with AVX
hjl dot tools at gmail dot com
gcc-bugzilla@gcc.gnu.org
Thu Feb 25 14:48:00 GMT 2010
On Linux/Intel64,
---
typedef int S;
typedef int V __attribute__((vector_size(16)));
typedef int IV __attribute__((vector_size(16)));
typedef union { S s[4]; V v; } U;
static U i[2], b, c;
extern int memcmp (const void *, const void *, __SIZE_TYPE__);
extern void abort ();
int main()
{
i[0].s[0] = 0;
i[0].s[1] = 1;
i[0].s[2] = 2;
i[0].s[3] = 3;
i[0].s[4] = 4;
i[0].s[5] = 5;
i[0].s[6] = 6;
i[0].s[7] = 7;
b.v = __builtin_ia32_vec_perm_v4si (i[0].v, i[1].v, (IV){4, 1, 2, 3});
c.s[0] = i[0].s[4];
c.s[1] = i[0].s[1];
c.s[2] = i[0].s[2];
c.s[3] = i[0].s[3];
__asm__("" : : : "memory");
if (memcmp (&b, &c, sizeof(c)) != 0)
abort ();
return 0;
}
--
aborted with -mavx. You can get Intel AVX SDE from
http://software.intel.com/en-us/avx/
to run it:
[hjl@gnu-6 gcc]$ ./xgcc -B./ -O -mavx /tmp/perm.c
[hjl@gnu-6 gcc]$ ./sde -- ./a.out
Aborted
[hjl@gnu-6 gcc]$ ./xgcc -B./ -O -mssse3 /tmp/perm.c
[hjl@gnu-6 gcc]$ ./a.out
[hjl@gnu-6 gcc]$
--
Summary: __builtin_ia32_vec_perm_v4si doesn't work with AVX
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: hjl dot tools at gmail dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43175
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