DD.h revision 353358
1#ifndef COMPILERRT_DD_HEADER 2#define COMPILERRT_DD_HEADER 3 4#include "../int_lib.h" 5 6typedef union { 7 long double ld; 8 struct { 9 double hi; 10 double lo; 11 } s; 12} DD; 13 14typedef 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 22static __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 28static __inline ALWAYS_INLINE double high26bits(double x) { 29 doublebits result = {.d = x}; 30 result.x &= UINT64_C(0xfffffffff8000000); 31 return result.d; 32} 33 34static __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 40long double __gcc_qadd(long double, long double); 41long double __gcc_qsub(long double, long double); 42long double __gcc_qmul(long double, long double); 43long double __gcc_qdiv(long double, long double); 44 45#endif // COMPILERRT_DD_HEADER 46