i386-1.c

来自「用于进行gcc测试」· C语言 代码 · 共 38 行

/* { dg-do run { target i?86-*-* x86_64-*-* } } */
/* { dg-options "-msse2" } */

#include <xmmintrin.h>

#include "cpuid.h"

static void
sse2_test (void)
{
  float a = 1.0f;
  float b = 2.0f;
  float c = 3.0f;
  float r;

  __m128 v = _mm_set_ps(a, b, c, 0);
  
  v = (__m128)_mm_srli_si128((__m128i)v, 4);
  _mm_store_ss(&r, v);
  if (r != 3.0f)
    abort ();
}

int
main ()
{
  unsigned int eax, ebx, ecx, edx;
 
  if (!__get_cpuid (1, &eax, &ebx, &ecx, &edx))
    return 0;

  /* Run SSE2 test only if host has SSE2 support.  */
  if (edx & bit_SSE2)
    sse2_test ();

  return 0;
}