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 #include "sse4_1-check.h"
   6
   7 #include <smmintrin.h>
   8
   9 #define NUM 64
  10
  11 static void
  12 sse4_1_test (void)
  13 {
  14   union
  15     {
  16       __m128i x[NUM/8];
  17       unsigned short s[NUM];
  18     } src;
  19   unsigned short minVal[NUM/8];
  20   int minInd[NUM/8];
  21   unsigned short minValScalar, minIndScalar;
  22   int i, j, res;
  23
  24   for (i = 0; i < NUM; i++)
  25     src.s[i] = i * i / (i + i / 3.14 + 1.0);
  26
  27   for (i = 0, j = 0; i < NUM; i += 8, j++)
  28     {
  29       res = _mm_cvtsi128_si32 (_mm_minpos_epu16 (src.x [i/8]));
  30       minVal[j] = res & 0xffff;
  31       minInd[j] = (res >> 16) & 0x3;
  32     }
  33
  34   for (i = 0; i < NUM; i += 8)
  35     {
  36       minValScalar = src.s[i];
  37       minIndScalar = 0;
  38
  39       for (j = i + 1; j < i + 8; j++)
  40         if (minValScalar > src.s[j])
  41           {
  42             minValScalar = src.s[j];
  43             minIndScalar = j - i;
  44           }
  45
  46       if (minValScalar != minVal[i/8] && minIndScalar != minInd[i/8])
  47         abort ();
  48     }
  49 }