gcc/testsuite/gcc.dg/ppc-mov-1.c

   1 /* { dg-do compile { target powerpc64-*-* } } */
   2 /* { dg-require-effective-target lp64 } */
   3 /* { dg-options "-O2" } */
   4
   5 /* { dg-final { scan-assembler-not "fmr \[0-9\]+,\[0-9\]+" } }
   6
   7 /* Origin:Pete Steinmetz <steinmtz@us.ibm.com> */
   8
   9 /* PR 16796: Extraneous move.  */
  10
  11 static const double huge = 1.0e300;
  12 typedef int int64_t __attribute__ ((__mode__ (__DI__)));
  13 typedef unsigned int u_int64_t __attribute__ ((__mode__ (__DI__)));
  14
  15 double __floor(double x)
  16 {
  17   union {
  18     double dbl_val;
  19     long int long_val;
  20   } temp;
  21
  22   int64_t i0,j0;
  23   u_int64_t i;
  24   temp.dbl_val = x;
  25   i0 = temp.long_val;
  26
  27   j0 = ((i0>>52)&0x7ff)-0x3ff;
  28   if(j0<52) {
  29     if(j0<0) {
  30       if(huge+x>0.0) {
  31         if(i0>=0) {i0=0;}
  32         else if((i0&0x7fffffffffffffff)!=0)
  33         { i0=0xbff0000000000000;}
  34       }
  35     } else {
  36       i = (0x000fffffffffffff)>>j0;
  37       if((i0&i)==0) return x;
  38       if(huge+x>0.0) {
  39         if(i0<0) i0 += (0x0010000000000000)>>j0;
  40         i0 &= (~i);
  41       }
  42     }
  43   } else {
  44     if (j0==0x400)
  45       return x+x;
  46     else
  47       return x;
  48   }
  49   temp.long_val = i0;
  50   x = temp.dbl_val;
  51   return x;
  52 }
  53