gcc/testsuite/gcc.target/i386/sse4_1-insvqi.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 #include <string.h>
  17
  18 typedef char T __attribute__((may_alias));
  19 struct S { __m128i d; };
  20
  21 __m128i
  22 __attribute__((noinline))
  23 foo (__m128i y, char x)
  24 {
  25   struct S s;
  26
  27   s.d = y;
  28   ((T *) &s.d)[1] = x;
  29   return s.d;
  30 }
  31
  32 static void
  33 TEST (void)
  34 {
  35   union
  36     {
  37       __m128i x;
  38       unsigned int i[4];
  39       unsigned char c[16];
  40     } res, val, tmp;
  41   unsigned char ins[4] = { 3, 4, 5, 6 };
  42
  43   val.i[0] = 0x35251505;
  44   val.i[1] = 0x75655545;
  45   val.i[2] = 0xB5A59585;
  46   val.i[3] = 0xF5E5D5C5;
  47
  48   res.x = foo (val.x, ins[3]);
  49
  50   tmp.x = val.x;
  51   tmp.c[1] = ins[3];
  52   if (memcmp (&tmp, &res, sizeof (tmp)))
  53     abort ();
  54 }