Viewing file:  vect-mulhrs-1.c (1.28 KB) -rw-r--r--
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/* { dg-require-effective-target vect_int } */
#include "tree-vect.h"
#ifndef SIGNEDNESS
#define SIGNEDNESS signed
#endif
#ifndef BIAS
#define BIAS 0
#endif
#define HRS(x) ((((x) >> (15 - BIAS)) + BIAS) >> BIAS)
void __attribute__ ((noipa))
f (SIGNEDNESS short *restrict a, SIGNEDNESS short *restrict b,
SIGNEDNESS short *restrict c, __INTPTR_TYPE__ n)
{
for (__INTPTR_TYPE__ i = 0; i < n; ++i)
a[i] = HRS((SIGNEDNESS int) b[i] * (SIGNEDNESS int) c[i]);
}
#define N 50
#define BASE1 ((SIGNEDNESS int) -1 < 0 ? -126 : 4)
#define BASE2 ((SIGNEDNESS int) -1 < 0 ? -101 : 26)
#define CONST1 0x01AB
#define CONST2 0x01CD
int
main (void)
{
check_vect ();
SIGNEDNESS short a[N], b[N], c[N];
for (int i = 0; i < N; ++i)
{
b[i] = BASE1 + i * CONST1;
c[i] = BASE2 + i * CONST2;
asm volatile ("" ::: "memory");
}
f (a, b, c, N);
for (int i = 0; i < N; ++i)
if (a[i] != HRS(BASE1 * BASE2 + i * i * (CONST1 * CONST2)
+ i * (BASE1 * CONST2 + BASE2 * CONST1)))
__builtin_abort ();
return 0;
}
/* { dg-final { scan-tree-dump "vect_recog_mulhs_pattern: detected" "vect" } } */
/* { dg-final { scan-tree-dump {\.MULHS} "vect" { target vect_mulhrs_hi } } } */
/* { dg-final { scan-tree-dump-times "vectorized 1 loop" 1 "vect" { target vect_mulhrs_hi } } } */
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