sys/external/bsd/compiler_rt/dist/lib/builtins/ppc/DD.h

   1 #ifndef __DD_HEADER
   2 #define __DD_HEADER
   3
   4 #include "../int_lib.h"
   5
   6 typedef union {
   7         long double ld;
   8         struct {
   9                 double hi;
  10                 double lo;
  11         }s;
  12 }DD;
  13
  14 typedef union {
  15         double d;
  16         uint64_t x;
  17 } doublebits;
  18
  19 #define LOWORDER(xy,xHi,xLo,yHi,yLo) \
  20         (((((xHi)*(yHi) - (xy)) + (xHi)*(yLo)) + (xLo)*(yHi)) + (xLo)*(yLo))
  21
  22 static inline double __attribute__((always_inline))
  23 local_fabs(double x)
  24 {
  25         doublebits result = { .d = x };
  26         result.x &= UINT64_C(0x7fffffffffffffff);
  27         return result.d;
  28 }
  29
  30 static inline double __attribute__((always_inline))
  31 high26bits(double x)
  32 {
  33         doublebits result = { .d = x };
  34         result.x &= UINT64_C(0xfffffffff8000000);
  35         return result.d;
  36 }
  37
  38 static inline int __attribute__((always_inline))
  39 different_sign(double x, double y)
  40 {
  41         doublebits xsignbit = { .d = x }, ysignbit = { .d = y };
  42         int result = (int)(xsignbit.x >> 63) ^ (int)(ysignbit.x >> 63);
  43         return result;
  44 }
  45
  46 #endif /* __DD_HEADER */