gnu/dist/gcc4/gcc/testsuite/gcc.target/i386/20020523-1.c

   1 /* PR target/6753
   2    This testcase was miscompiled because sse_mov?fcc_const0*
   3    patterns were missing earlyclobber.  */
   4 /* { dg-do run { target i?86-*-* x86_64-*-* } } */
   5 /* { dg-skip-if "" { ilp32 } { "-fpic" "-fPIC" } { "" } } */
   6 /* { dg-require-effective-target ilp32 } */
   7 /* { dg-options "-march=pentium3 -msse -ffast-math -O2" } */
   8
   9 extern void abort (void);
  10 extern void exit (int);
  11
  12 float one = 1.f;
  13
  14 void bar (float f)
  15 {
  16   if (__builtin_memcmp (&one, &f, sizeof (float)))
  17     abort ();
  18 }
  19
  20 float foo (void)
  21 {
  22   return 1.f;
  23 }
  24
  25 typedef struct
  26 {
  27   float t;
  28 } T;
  29
  30 void bail_if_no_sse (void)
  31 {
  32   int fl1, fl2;
  33
  34   /* See if we can use cpuid.  */
  35   __asm__ ("pushfl; pushfl; popl %0; movl %0,%1; xorl %2,%0;"
  36            "pushl %0; popfl; pushfl; popl %0; popfl"
  37            : "=&r" (fl1), "=&r" (fl2)
  38            : "i" (0x00200000));
  39   if (((fl1 ^ fl2) & 0x00200000) == 0)
  40     exit (0);
  41
  42   /* See if cpuid gives capabilities.  */
  43   __asm__ ("cpuid" : "=a" (fl1) : "0" (0) : "ebx", "ecx", "edx", "cc");
  44   if (fl1 == 0)
  45     exit (0);
  46
  47   /* See if capabilities include SSE (25th bit; 26 for SSE2).  */
  48   __asm__ ("cpuid" : "=a" (fl1), "=d" (fl2) : "0" (1) : "ebx", "ecx", "cc");
  49   if ((fl2 & (1 << 25)) == 0)
  50     exit (0);
  51 }
  52
  53 int main (void)
  54 {
  55   int i;
  56   T x[1];
  57
  58   bail_if_no_sse ();
  59   for (i = 0; i < 1; i++)
  60     {
  61       x[i].t = foo ();
  62       x[i].t = 0.f > x[i].t ? 0.f : x[i].t;
  63       bar (x[i].t);
  64     }
  65
  66   exit (0);
  67 }