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#ifndef _LDHACK_H
#define _LDHACK_H
#include <float.h>
#include <stdint.h>
#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
#elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384
union ldshape {
long double value;
struct {
uint64_t m;
uint16_t exp:15;
uint16_t sign:1;
uint16_t pad;
} bits;
};
#elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384
union ldshape {
long double value;
struct {
uint64_t mlo;
uint64_t mhi:48;
uint16_t exp:15;
uint16_t sign:1;
} bits;
};
#else
#error Unsupported long double representation
#endif
// FIXME: hacks to make freebsd+openbsd long double code happy
// union and macros for freebsd
#if LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384
union IEEEl2bits {
long double e;
struct {
uint32_t manl:32;
uint32_t manh:32;
uint32_t exp:15;
uint32_t sign:1;
uint32_t pad:16;
} bits;
struct {
uint64_t man:64;
uint32_t expsign:16;
uint32_t pad:16;
} xbits;
};
#define LDBL_MANL_SIZE 32
#define LDBL_MANH_SIZE 32
#define LDBL_NBIT (1ull << LDBL_MANH_SIZE-1)
#undef LDBL_IMPLICIT_NBIT
#define mask_nbit_l(u) ((u).bits.manh &= ~LDBL_NBIT)
#elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384
/*
// ld128 float.h
//#define LDBL_MAX 1.189731495357231765085759326628007016E+4932L
#define LDBL_MAX 0x1.ffffffffffffffffffffffffffffp+16383
#define LDBL_MAX_EXP 16384
#define LDBL_HAS_INFINITY 1
//#define LDBL_MIN 3.362103143112093506262677817321752603E-4932L
#define LDBL_MIN 0x1p-16382
#define LDBL_HAS_QUIET_NAN 1
#define LDBL_HAS_DENORM 1
//#define LDBL_EPSILON 1.925929944387235853055977942584927319E-34L
#define LDBL_EPSILON 0x1p-112
#define LDBL_MANT_DIG 113
#define LDBL_MIN_EXP (-16381)
#define LDBL_MAX_10_EXP 4932
#define LDBL_DENORM_MIN 0x0.0000000000000000000000000001p-16381
#define LDBL_MIN_10_EXP (-4931)
#define LDBL_DIG 33
*/
union IEEEl2bits {
long double e;
struct {
uint64_t manl:64;
uint64_t manh:48;
uint32_t exp:15;
uint32_t sign:1;
} bits;
struct {
uint64_t unused0:64;
uint64_t unused1:48;
uint32_t expsign:16;
} xbits;
};
#define LDBL_MANL_SIZE 64
#define LDBL_MANH_SIZE 48
#define LDBL_NBIT (1ull << LDBL_MANH_SIZE)
#define LDBL_IMPLICIT_NBIT 1
#define mask_nbit_l(u)
#endif
// macros for openbsd
#define GET_LDOUBLE_WORDS(se,mh,ml, f) do{ \
union IEEEl2bits u; \
u.e = (f); \
(se) = u.xbits.expsign; \
(mh) = u.bits.manh; \
(ml) = u.bits.manl; \
}while(0)
#define SET_LDOUBLE_WORDS(f, se,mh,ml) do{ \
union IEEEl2bits u; \
u.xbits.expsign = (se); \
u.bits.manh = (mh); \
u.bits.manl = (ml); \
(f) = u.e; \
}while(0)
#define GET_LDOUBLE_EXP(se, f) do{ \
union IEEEl2bits u; \
u.e = (f); \
(se) = u.xbits.expsign; \
}while(0)
#define SET_LDOUBLE_EXP(f, se) do{ \
union IEEEl2bits u; \
u.e = (f); \
u.xbits.expsign = (se); \
(f) = u.e; \
}while(0)
#endif
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