gcc/testsuite/gcc.target/i386/sse4_1-pmaxsb.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 1024
  10
  11 static void
  12 sse4_1_test (void)
  13 {
  14   union
  15     {
  16       __m128i x[NUM / 16];
  17       char i[NUM];
  18     } dst, src1, src2;
  19   int i, sign = 1;
  20   char max;
  21
  22   for (i = 0; i < NUM; i++)
  23     {
  24       src1.i[i] = i * i * sign;
  25       src2.i[i] = (i + 20) * sign;
  26       sign = -sign;
  27     }
  28
  29   for (i = 0; i < NUM; i += 16)
  30     dst.x[i / 16] = _mm_max_epi8 (src1.x[i / 16], src2.x[i / 16]);
  31
  32   for (i = 0; i < NUM; i++)
  33     {
  34       max = src1.i[i] <= src2.i[i] ? src2.i[i] : src1.i[i];
  35       if (max != dst.i[i])
  36         abort ();
  37     }
  38 }