C++ (Cpp) _mm_i32gather_pd示例

示例#1

文件： avx2-i32gatherpd-2.c 项目： 0day-ci/gcc

void static
avx2_test (void)
{
  int i;
  union128i_d idx;
  union128d res;
  double s1[2], res_ref[2] = { 0 };

  for (i = 0; i < 2; ++i)
    {
      /* Set some stuff */
      s1[i] = 2.718281828459045 * (i + 1) * (i + 2);

      /* About to gather in reverse order,
         divide by 2 to demonstrate scale */
      idx.a[i] = (16 - (i + 1) * 8) >> 1;
    }

  res.x = _mm_i32gather_pd (s1, idx.x, 2);

  compute_i32gatherpd (s1, idx.a, 2, res_ref);

  if (check_union128d (res, res_ref) != 0)
    abort ();
}

示例#2

文件： avx2-builtins.c 项目： autodesk-forks/llvm-clang

__m128d test_mm_i32gather_pd(double const *b, __m128i c) {
  // CHECK-LABEL: test_mm_i32gather_pd
  // CHECK:         [[CMP:%.*]] = fcmp oeq <2 x double>
  // CHECK-NEXT:    [[SEXT:%.*]] = sext <2 x i1> [[CMP]] to <2 x i64>
  // CHECK-NEXT:    [[BC:%.*]] = bitcast <2 x i64> [[SEXT]] to <2 x double>
  // CHECK: call <2 x double> @llvm.x86.avx2.gather.d.pd(<2 x double> undef, i8* %{{.*}}, <4 x i32> %{{.*}}, <2 x double> %{{.*}}, i8 2)
  return _mm_i32gather_pd(b, c, 2);
}

示例#3

文件： avx2-builtins.c 项目： Bigcheese/clang

__m128d test_mm_i32gather_pd(double const *b, __m128i c) {
  // CHECK: @llvm.x86.avx2.gather.d.pd
  return _mm_i32gather_pd(b, c, 2);
}

示例#4

文件： avx2-i32gatherpd-1.c 项目： AsherBond/MondocosmOS-Dependencies

void extern
avx2_test (void)
{
  x = _mm_i32gather_pd (base, idx, 1);
}