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 */ 46
