gcc/testsuite/gcc.dg/ultrasp7.c

   1 /* PR c/8281 */
   2 /* Originator: TANIGUCHI Yasuaki <yasuaki@k8.dion.ne.jp> */
   3 /* { dg-do compile { target sparc-*-* } } */
   4 /* { dg-options "-O2 -mcpu=ultrasparc -fPIC" } */
   5
   6 static const double bp = 1.0, dp_l[] = { 0.0 };
   7
   8 double __ieee754_pow(double x, double y)
   9 {
  10   union {
  11     int lo;
  12     double d;
  13   }uz;
  14
  15   double y1,t1,p_h,t,z;
  16   double z_h,z_l,p_l;
  17   double t2,r,s,u,v,w;
  18   int i = 0;
  19
  20   double s_h,t_h;
  21   double s2,s_l,t_l;
  22
  23
  24   v = 1.0/(v+bp);
  25   uz.d = s_h = s = u*v;
  26   uz.lo = 0;
  27   s_h = uz.d;
  28   uz.d = t_h;
  29   uz.lo = 3;
  30   t_h = uz.d;
  31   s_l = v*((u-s_h*t_h)-s_h*t_l);
  32   s2 = s*s;
  33   r = s2* s2* (1.1+s2*(1.2+s2*(1.3+s2*(1.4+s2*(1.5+s2*1.6)))));
  34   s2 = s_h*s_h;
  35   uz.lo = 0;
  36   t_h = uz.d;
  37   t_l = r-((t_h-3.0)-s2);
  38   v = s_l*t_h+t_l*s;
  39   p_l = v-(p_h-u);
  40   z_h = bp *p_h;
  41   z_l = bp*p_h+p_l*1.0+dp_l[i];
  42   t = (double)i;
  43   t1 = (((bp+z_l)+bp)+t);
  44   t2 = z_l-(((t1-t)-bp)-z_h);
  45   p_l = (y-y1)*t1+y*t2;
  46   z = p_l+p_h;
  47
  48   return s*z;
  49 }