gcc/testsuite/gcc.target/i386/sse2-packuswb-1.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O2 -msse2" } */
   3 /* { dg-require-effective-target sse2 } */
   4
   5 #ifndef CHECK_H
   6 #define CHECK_H "sse2-check.h"
   7 #endif
   8
   9 #ifndef TEST
  10 #define TEST sse2_test
  11 #endif
  12
  13 #include CHECK_H
  14
  15 #include <emmintrin.h>
  16
  17 static __m128i
  18 __attribute__((noinline, unused))
  19 test (__m128i s1, __m128i s2)
  20 {
  21   return _mm_packus_epi16 (s1, s2);
  22 }
  23
  24 static void
  25 TEST (void)
  26 {
  27   union128i_w s1, s2;
  28   union128i_ub u;
  29   unsigned char e[16];
  30   int i, tmp;
  31
  32   s1.x = _mm_set_epi16 (1, 2, 3, 4, -5, -6, -7, -8);
  33   s2.x = _mm_set_epi16 (-9, -10, -11, -12, 13, 14, 15, 16);
  34   u.x = test (s1.x, s2.x);
  35
  36   for (i=0; i<8; i++)
  37     {
  38       tmp = s1.a[i]<0 ? 0 : s1.a[i];
  39       tmp = tmp>255 ? 255 : tmp;
  40       e[i] = tmp;
  41
  42       tmp = s2.a[i]<0 ? 0 : s2.a[i];
  43       tmp = tmp>255 ? 255 : tmp;
  44       e[i+8] = tmp;
  45     }
  46
  47   if (check_union128i_ub (u, e))
  48     abort ();
  49 }