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#ifndef __DD_HEADER
#define __DD_HEADER
#include <stdint.h>
typedef union {
long double ld;
struct {
double hi;
double lo;
};
} DD;
typedef union {
double d;
uint64_t x;
} doublebits;
#define LOWORDER(xy,xHi,xLo,yHi,yLo) \
(((((xHi)*(yHi) - (xy)) + (xHi)*(yLo)) + (xLo)*(yHi)) + (xLo)*(yLo))
static inline double __attribute__((always_inline))
fabs(double x)
{
doublebits result = { .d = x };
result.x &= UINT64_C(0x7fffffffffffffff);
return result.d;
}
static inline double __attribute__((always_inline))
high26bits(double x)
{
doublebits result = { .d = x };
result.x &= UINT64_C(0xfffffffff8000000);
return result.d;
}
static inline int __attribute__((always_inline))
different_sign(double x, double y)
{
doublebits xsignbit = { .d = x }, ysignbit = { .d = y };
int result = (int)(xsignbit.x >> 63) ^ (int)(ysignbit.x >> 63);
return result;
}
#endif // __DD_HEADER
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