DD.h revision 341825 
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