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#ifndef _IEEE_FP_H_
#define _IEEE_FP_H_
#include "_ansi.h"
#include <machine/ieeefp.h>
_BEGIN_STD_C
/* FIXME FIXME FIXME:
Neither of __ieee_{float,double}_shape_tape seem to be used anywhere
except in libm/test. If that is the case, please delete these from here.
If that is not the case, please insert documentation here describing why
they're needed. */
#ifdef __IEEE_BIG_ENDIAN
typedef union
{
double value;
struct
{
unsigned int sign : 1;
unsigned int exponent: 11;
unsigned int fraction0:4;
unsigned int fraction1:16;
unsigned int fraction2:16;
unsigned int fraction3:16;
} number;
struct
{
unsigned int sign : 1;
unsigned int exponent: 11;
unsigned int quiet:1;
unsigned int function0:3;
unsigned int function1:16;
unsigned int function2:16;
unsigned int function3:16;
} nan;
struct
{
unsigned long msw;
unsigned long lsw;
} parts;
long aslong[2];
} __ieee_double_shape_type;
#endif
#ifdef __IEEE_LITTLE_ENDIAN
typedef union
{
double value;
struct
{
#ifdef __SMALL_BITFIELDS
unsigned int fraction3:16;
unsigned int fraction2:16;
unsigned int fraction1:16;
unsigned int fraction0: 4;
#else
unsigned int fraction1:32;
unsigned int fraction0:20;
#endif
unsigned int exponent :11;
unsigned int sign : 1;
} number;
struct
{
#ifdef __SMALL_BITFIELDS
unsigned int function3:16;
unsigned int function2:16;
unsigned int function1:16;
unsigned int function0:3;
#else
unsigned int function1:32;
unsigned int function0:19;
#endif
unsigned int quiet:1;
unsigned int exponent: 11;
unsigned int sign : 1;
} nan;
struct
{
unsigned long lsw;
unsigned long msw;
} parts;
long aslong[2];
} __ieee_double_shape_type;
#endif
#ifdef __IEEE_BIG_ENDIAN
typedef union
{
float value;
struct
{
unsigned int sign : 1;
unsigned int exponent: 8;
unsigned int fraction0: 7;
unsigned int fraction1: 16;
} number;
struct
{
unsigned int sign:1;
unsigned int exponent:8;
unsigned int quiet:1;
unsigned int function0:6;
unsigned int function1:16;
} nan;
long p1;
} __ieee_float_shape_type;
#endif
#ifdef __IEEE_LITTLE_ENDIAN
typedef union
{
float value;
struct
{
unsigned int fraction0: 7;
unsigned int fraction1: 16;
unsigned int exponent: 8;
unsigned int sign : 1;
} number;
struct
{
unsigned int function1:16;
unsigned int function0:6;
unsigned int quiet:1;
unsigned int exponent:8;
unsigned int sign:1;
} nan;
long p1;
} __ieee_float_shape_type;
#endif
/* FLOATING ROUNDING */
typedef int fp_rnd;
#define FP_RN 0 /* Round to nearest */
#define FP_RM 1 /* Round down */
#define FP_RP 2 /* Round up */
#define FP_RZ 3 /* Round to zero (trunate) */
fp_rnd _EXFUN(fpgetround,(void));
fp_rnd _EXFUN(fpsetround, (fp_rnd));
/* EXCEPTIONS */
typedef int fp_except;
#define FP_X_INV 0x10 /* Invalid operation */
#define FP_X_DX 0x80 /* Divide by zero */
#define FP_X_OFL 0x04 /* Overflow exception */
#define FP_X_UFL 0x02 /* Underflow exception */
#define FP_X_IMP 0x01 /* imprecise exception */
fp_except _EXFUN(fpgetmask,(void));
fp_except _EXFUN(fpsetmask,(fp_except));
fp_except _EXFUN(fpgetsticky,(void));
fp_except _EXFUN(fpsetsticky, (fp_except));
/* INTEGER ROUNDING */
typedef int fp_rdi;
#define FP_RDI_TOZ 0 /* Round to Zero */
#define FP_RDI_RD 1 /* Follow float mode */
fp_rdi _EXFUN(fpgetroundtoi,(void));
fp_rdi _EXFUN(fpsetroundtoi,(fp_rdi));
#undef isnan
#undef isinf
int _EXFUN(isnan, (double));
int _EXFUN(isinf, (double));
int _EXFUN(finite, (double));
int _EXFUN(isnanf, (float));
int _EXFUN(isinff, (float));
int _EXFUN(finitef, (float));
#define __IEEE_DBL_EXPBIAS 1023
#define __IEEE_FLT_EXPBIAS 127
#define __IEEE_DBL_EXPLEN 11
#define __IEEE_FLT_EXPLEN 8
#define __IEEE_DBL_FRACLEN (64 - (__IEEE_DBL_EXPLEN + 1))
#define __IEEE_FLT_FRACLEN (32 - (__IEEE_FLT_EXPLEN + 1))
#define __IEEE_DBL_MAXPOWTWO ((double)(1L << 32 - 2) * (1L << (32-11) - 32 + 1))
#define __IEEE_FLT_MAXPOWTWO ((float)(1L << (32-8) - 1))
#define __IEEE_DBL_NAN_EXP 0x7ff
#define __IEEE_FLT_NAN_EXP 0xff
#define isnanf(x) (((*(long *)&(x) & 0x7f800000L)==0x7f800000L) && \
((*(long *)&(x) & 0x007fffffL)!=0000000000L))
#define isinff(x) (((*(long *)&(x) & 0x7f800000L)==0x7f800000L) && \
((*(long *)&(x) & 0x007fffffL)==0000000000L))
#define finitef(x) (((*(long *)&(x) & 0x7f800000L)!=0x7f800000L))
#ifdef _DOUBLE_IS_32BITS
#undef __IEEE_DBL_EXPBIAS
#define __IEEE_DBL_EXPBIAS __IEEE_FLT_EXPBIAS
#undef __IEEE_DBL_EXPLEN
#define __IEEE_DBL_EXPLEN __IEEE_FLT_EXPLEN
#undef __IEEE_DBL_FRACLEN
#define __IEEE_DBL_FRACLEN __IEEE_FLT_FRACLEN
#undef __IEEE_DBL_MAXPOWTWO
#define __IEEE_DBL_MAXPOWTWO __IEEE_FLT_MAXPOWTWO
#undef __IEEE_DBL_NAN_EXP
#define __IEEE_DBL_NAN_EXP __IEEE_FLT_NAN_EXP
#undef __ieee_double_shape_type
#define __ieee_double_shape_type __ieee_float_shape_type
#endif /* _DOUBLE_IS_32BITS */
_END_STD_C
#endif /* _IEEE_FP_H_ */
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