Viewing file:  swaps-p8-14.c (1.2 KB) -rw-r--r--
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/* { dg-do compile } */
/* { dg-require-effective-target powerpc_p8vector_ok } */
/* { dg-options "-mdejagnu-cpu=power8 -O3" } */
/* { dg-final { scan-assembler "lxvd2x" } } */
/* { dg-final { scan-assembler "stxvd2x" } } */
/* { dg-final { scan-assembler "stxsdx" } } */
/* { dg-final { scan-assembler-times "xxpermdi" 1 } } */
/* The only xxpermdi expected is for the vec_splats. */
#include <altivec.h>
void abort ();
#define N 4096
long long ca[N] __attribute__((aligned(16)));
long long cb[N] __attribute__((aligned(16)));
long long cc[N] __attribute__((aligned(16)));
long long cd[N] __attribute__((aligned(16)));
long long x;
__attribute__((noinline)) void foo ()
{
int i;
vector long long va, vb, vc, vd, tmp;
volatile unsigned long long three = 3;
vector unsigned long long threes = vec_splats (three);
for (i = 0; i < N; i+=2) {
vb = vec_vsx_ld (0, (vector long long *)&cb[i]);
vc = vec_vsx_ld (0, (vector long long *)&cc[i]);
vd = vec_vsx_ld (0, (vector long long *)&cd[i]);
tmp = vec_add (vb, vc);
tmp = vec_sub (tmp, vd);
tmp = vec_sra (tmp, threes);
x = vec_extract (tmp, 0);
vec_vsx_st (tmp, 0, (vector long long *)&ca[i]);
}
}
int main ()
{
foo ();
return 0;
}
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