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

   1 /* { dg-do run } */
   2 /* { dg-require-effective-target ssse3 } */
   3 /* { dg-options "-O2 -fno-strict-aliasing -mssse3" } */
   4
   5 #ifndef CHECK_H
   6 #define CHECK_H "ssse3-check.h"
   7 #endif
   8
   9 #ifndef TEST
  10 #define TEST ssse3_test
  11 #endif
  12
  13 #include CHECK_H
  14
  15 #include "ssse3-vals.h"
  16
  17 #include <tmmintrin.h>
  18
  19 /* Test the 64-bit form */
  20 static void
  21 ssse3_test_pshufb (int *i1, int *i2, int *r)
  22 {
  23   __m64 t1 = *(__m64 *) i1;
  24   __m64 t2 = *(__m64 *) i2;
  25   *(__m64 *)r = _mm_shuffle_pi8 (t1, t2);
  26   _mm_empty ();
  27 }
  28
  29 /* Test the 128-bit form */
  30 static void
  31 ssse3_test_pshufb128 (int *i1, int *i2, int *r)
  32 {
  33   /* Assumes incoming pointers are 16-byte aligned */
  34   __m128i t1 = *(__m128i *) i1;
  35   __m128i t2 = *(__m128i *) i2;
  36   *(__m128i *)r = _mm_shuffle_epi8 (t1, t2);
  37 }
  38
  39 /* Routine to manually compute the results */
  40 static void
  41 compute_correct_result_64 (int *i1, int *i2, int *r)
  42 {
  43   char *b1 = (char *) i1;
  44   char *b2 = (char *) i2;
  45   char *bout = (char *) r;
  46   int i;
  47   char select;
  48
  49   for (i = 0; i < 16; i++)
  50     {
  51       select = b2[i];
  52       if (select & 0x80)
  53         bout[i] = 0;
  54       else if (i < 8)
  55         bout[i] = b1[select & 0x7];
  56       else
  57         bout[i] = b1[8 + (select & 0x7)];
  58     }
  59 }
  60
  61 static void
  62 compute_correct_result_128 (int *i1, int *i2, int *r)
  63 {
  64   char *b1 = (char *) i1;
  65   char *b2 = (char *) i2;
  66   char *bout = (char *) r;
  67   int i;
  68   char select;
  69
  70   for (i = 0; i < 16; i++)
  71     {
  72       select = b2[i];
  73       if (select & 0x80)
  74         bout[i] = 0;
  75       else
  76         bout[i] = b1[select & 0xf];
  77     }
  78 }
  79
  80 static void
  81 TEST (void)
  82 {
  83   int i;
  84   int r [4] __attribute__ ((aligned(16)));
  85   int ck [4];
  86   int fail = 0;
  87
  88   for (i = 0; i < 256; i += 8)
  89     {
  90       /* Manually compute the result */
  91       compute_correct_result_64 (&vals[i + 0], &vals[i + 4], ck);
  92
  93       /* Run the 64-bit tests */
  94       ssse3_test_pshufb (&vals[i + 0], &vals[i + 4], &r[0]);
  95       ssse3_test_pshufb (&vals[i + 2], &vals[i + 6], &r[2]);
  96       fail += chk_128 (ck, r);
  97
  98       /* Recompute the result for 128-bits */
  99       compute_correct_result_128 (&vals[i + 0], &vals[i + 4], ck);
 100
 101       /* Run the 128-bit tests */
 102       ssse3_test_pshufb128 (&vals[i + 0], &vals[i + 4], r);
 103       fail += chk_128 (ck, r);
 104     }
 105
 106   if (fail != 0)
 107     abort ();
 108 }