gcc/testsuite/gcc.target/i386/ssse3-pmulhrsw.c

   1 /* { dg-do run } */
   2 /* { dg-require-effective-target ssse3 } */
   3 /* { dg-options "-O2 -fno-strict-aliasing -mssse3" } */
   4
   5 #include "ssse3-check.h"
   6 #include "ssse3-vals.h"
   7
   8 #include <tmmintrin.h>
   9
  10 /* Test the 64-bit form */
  11 static void
  12 ssse3_test_pmulhrsw (int *i1, int *i2, int *r)
  13 {
  14   __m64 t1 = *(__m64 *) i1;
  15   __m64 t2 = *(__m64 *) i2;
  16   *(__m64 *) r = _mm_mulhrs_pi16 (t1, t2);
  17   _mm_empty ();
  18 }
  19
  20 /* Test the 128-bit form */
  21 static void
  22 ssse3_test_pmulhrsw128 (int *i1, int *i2, int *r)
  23 {
  24   /* Assumes incoming pointers are 16-byte aligned */
  25   __m128i t1 = *(__m128i *) i1;
  26   __m128i t2 = *(__m128i *) i2;
  27   *(__m128i *) r = _mm_mulhrs_epi16 (t1, t2);
  28 }
  29
  30 /* Routine to manually compute the results */
  31 static void
  32 compute_correct_result (int *i1, int *i2, int *r)
  33 {
  34   short *s1 = (short *) i1;
  35   short *s2 = (short *) i2;
  36   short *sout = (short *) r;
  37   int t0;
  38   int i;
  39
  40   for (i = 0; i < 8; i++)
  41     {
  42       t0 = (((int) s1[i] * (int) s2[i]) >> 14) + 1;
  43       sout[i] = (short) (t0 >> 1);
  44     }
  45 }
  46
  47 static void
  48 ssse3_test (void)
  49 {
  50   int i;
  51   int r [4] __attribute__ ((aligned(16)));
  52   int ck [4];
  53   int fail = 0;
  54
  55   for (i = 0; i < 256; i += 8)
  56     {
  57       /* Manually compute the result */
  58       compute_correct_result (&vals[i + 0], &vals[i + 4], ck);
  59
  60       /* Run the 64-bit tests */
  61       ssse3_test_pmulhrsw (&vals[i + 0], &vals[i + 4], &r[0]);
  62       ssse3_test_pmulhrsw (&vals[i + 2], &vals[i + 6], &r[2]);
  63       fail += chk_128 (ck, r);
  64
  65       /* Run the 128-bit tests */
  66       ssse3_test_pmulhrsw128 (&vals[i + 0], &vals[i + 4], r);
  67       fail += chk_128 (ck, r);
  68     }
  69
  70   if (fail != 0)
  71     abort ();
  72 }