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
local_fabs(double x)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
high26bits(double x)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
different_sign(double x,double y)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