gcc/testsuite/gcc.target/i386/sse4_1-phminposuw.c

   1 /* { dg-do run } */
   2 /* { dg-require-effective-target sse4 } */
   3 /* { dg-options "-O2 -msse4.1" } */
   4
   5 #ifndef CHECK_H
   6 #define CHECK_H "sse4_1-check.h"
   7 #endif
   8
   9 #ifndef TEST
  10 #define TEST sse4_1_test
  11 #endif
  12
  13 #include CHECK_H
  14
  15 #include <smmintrin.h>
  16
  17 #define NUM 64
  18
  19 static void
  20 TEST (void)
  21 {
  22   union
  23     {
  24       __m128i x[NUM/8];
  25       unsigned short s[NUM];
  26     } src;
  27   unsigned short minVal[NUM/8];
  28   int minInd[NUM/8];
  29   unsigned short minValScalar, minIndScalar;
  30   int i, j, res;
  31
  32   for (i = 0; i < NUM; i++)
  33     src.s[i] = i * i / (i + i / 3.14 + 1.0);
  34
  35   for (i = 0, j = 0; i < NUM; i += 8, j++)
  36     {
  37       res = _mm_cvtsi128_si32 (_mm_minpos_epu16 (src.x [i/8]));
  38       minVal[j] = res & 0xffff;
  39       minInd[j] = (res >> 16) & 0x3;
  40     }
  41
  42   for (i = 0; i < NUM; i += 8)
  43     {
  44       minValScalar = src.s[i];
  45       minIndScalar = 0;
  46
  47       for (j = i + 1; j < i + 8; j++)
  48         if (minValScalar > src.s[j])
  49           {
  50             minValScalar = src.s[j];
  51             minIndScalar = j - i;
  52           }
  53
  54       if (minValScalar != minVal[i/8] && minIndScalar != minInd[i/8])
  55         abort ();
  56     }
  57 }