compiler-rt/lib/builtins/ppc/DD.h

   1 #ifndef COMPILERRT_DD_HEADER
   2 #define COMPILERRT_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 ALWAYS_INLINE double local_fabs(double x) {
  23   doublebits result = {.d = x};
  24   result.x &= UINT64_C(0x7fffffffffffffff);
  25   return result.d;
  26 }
  27
  28 static __inline ALWAYS_INLINE double high26bits(double x) {
  29   doublebits result = {.d = x};
  30   result.x &= UINT64_C(0xfffffffff8000000);
  31   return result.d;
  32 }
  33
  34 static __inline ALWAYS_INLINE int different_sign(double x, double y) {
  35   doublebits xsignbit = {.d = x}, ysignbit = {.d = y};
  36   int result = (int)(xsignbit.x >> 63) ^ (int)(ysignbit.x >> 63);
  37   return result;
  38 }
  39
  40 long double __gcc_qadd(long double, long double);
  41 long double __gcc_qsub(long double, long double);
  42 long double __gcc_qmul(long double, long double);
  43 long double __gcc_qdiv(long double, long double);
  44
  45 #endif // COMPILERRT_DD_HEADER