gcc/testsuite/gcc.c-torture/execute/20050604-1.c

   1 /* PR regression/21897 */
   2 /* This testcase generates MMX instructions together with x87 instructions.
   3    Currently, there is no "emms" generated to switch between register sets,
   4    so the testcase fails for targets where MMX insns are enabled.  */
   5 /* { dg-options "-mno-mmx" { target { x86_64-*-* i?86-*-* } } } */
   6
   7 extern void abort (void);
   8
   9 typedef unsigned short v4hi __attribute__ ((vector_size (8)));
  10 typedef float v4sf __attribute__ ((vector_size (16)));
  11
  12 union
  13 {
  14   v4hi v;
  15   short s[4];
  16 } u;
  17
  18 union
  19 {
  20   v4sf v;
  21   float f[4];
  22 } v;
  23
  24 void
  25 foo (void)
  26 {
  27   unsigned int i;
  28   for (i = 0; i < 2; i++)
  29     u.v += (v4hi) { 12, 32768 };
  30   for (i = 0; i < 2; i++)
  31     v.v += (v4sf) { 18.0, 20.0, 22 };
  32 }
  33
  34 int
  35 main (void)
  36 {
  37   foo ();
  38   if (u.s[0] != 24 || u.s[1] != 0 || u.s[2] || u.s[3])
  39     abort ();
  40   if (v.f[0] != 36.0 || v.f[1] != 40.0 || v.f[2] != 44.0 || v.f[3] != 0.0)
  41     abort ();
  42   return 0;
  43 }