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 #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 1024
  18
  19 static void
  20 TEST (void)
  21 {
  22   union
  23     {
  24       __m128i x[NUM / 16];
  25       char i[NUM];
  26     } dst, src1, src2;
  27   int i, sign = 1;
  28   char max;
  29
  30   for (i = 0; i < NUM; i++)
  31     {
  32       src1.i[i] = i * i * sign;
  33       src2.i[i] = (i + 20) * sign;
  34       sign = -sign;
  35     }
  36
  37   for (i = 0; i < NUM; i += 16)
  38     dst.x[i / 16] = _mm_max_epi8 (src1.x[i / 16], src2.x[i / 16]);
  39
  40   for (i = 0; i < NUM; i++)
  41     {
  42       max = src1.i[i] <= src2.i[i] ? src2.i[i] : src1.i[i];
  43       if (max != dst.i[i])
  44         abort ();
  45     }
  46 }