IEEE floating point functions. More...

Classes
struct	fpvalue_t
	Processor-independent representation of a floating point value. More...

Typedefs
typedef uint16	eNI[IEEE_NI]
	There is one more internal format used by IDA to store intermediate values.

Enumerations
enum	fpvalue_kind_t { FPV_BADARG , FPV_NORM , FPV_NAN , FPV_PINF , FPV_NINF }
	Floating value kinds. More...
enum	fpvalue_error_t { REAL_ERROR_OK = 1 , REAL_ERROR_FORMAT = -1 , REAL_ERROR_RANGE = -2 , REAL_ERROR_BADDATA = -3 , REAL_ERROR_FPOVER = 2 , REAL_ERROR_BADSTR = 3 , REAL_ERROR_ZERODIV = 4 , REAL_ERROR_INTOVER = 5 }

Functions
idaman THREAD_SAFE fpvalue_error_t ida_export	ieee_realcvt (void m, fpvalue_t out, uint16 swt)
	Standard IEEE 754 floating point conversion function.
idaman THREAD_SAFE void ida_export	realtoasc (char *buf, size_t bufsize, const fpvalue_t &x, uint mode)
idaman THREAD_SAFE fpvalue_error_t ida_export	asctoreal (const char *sss, fpvalue_t out)
idaman THREAD_SAFE void ida_export	eltoe (sval_t l, fpvalue_t *vout)
idaman THREAD_SAFE void ida_export	eltoe64 (int64 l, fpvalue_t *vout)
idaman THREAD_SAFE void ida_export	eltoe64u (uint64 l, fpvalue_t *vout)
idaman THREAD_SAFE fpvalue_error_t ida_export	eetol (sval_t *out, const fpvalue_t &a, bool roundflg)
idaman THREAD_SAFE fpvalue_error_t ida_export	eetol64 (int64 *out, const fpvalue_t &a, bool roundflg)
idaman THREAD_SAFE fpvalue_error_t ida_export	eetol64u (uint64 *out, const fpvalue_t &a, bool roundflg)
idaman THREAD_SAFE fpvalue_error_t ida_export	eldexp (const fpvalue_t &a, int32 pwr2, fpvalue_t *zout)
idaman THREAD_SAFE fpvalue_error_t ida_export	eadd (const fpvalue_t &a, const fpvalue_t &b, fpvalue_t *zout, bool subflg)
idaman THREAD_SAFE fpvalue_error_t ida_export	emul (const fpvalue_t &a, const fpvalue_t &b, fpvalue_t *zout)
idaman THREAD_SAFE fpvalue_error_t ida_export	ediv (const fpvalue_t &a, const fpvalue_t &b, fpvalue_t *zout)
idaman THREAD_SAFE int ida_export	ecmp (const fpvalue_t &a, const fpvalue_t &b)
idaman THREAD_SAFE fpvalue_kind_t ida_export	get_fpvalue_kind (const fpvalue_t &a, uint16 reserved=0)
IEEE_DEPRECATED void	ecleaz (eNI x)
idaman IEEE_DEPRECATED THREAD_SAFE void ida_export	emovo (const eNI a, fpvalue_t *vout)
idaman IEEE_DEPRECATED THREAD_SAFE void ida_export	emovi (const fpvalue_t &a, eNI vout)
	Move eNI => eNE.
idaman IEEE_DEPRECATED THREAD_SAFE int ida_export	eshift (eNI x, int sc)
	Move eNE => eNI.
idaman IEEE_DEPRECATED THREAD_SAFE bool ida_export	emdnorm (eNI s, bool lost, bool subflg, int32 exp, int rndbase)
	Shift NI format up (+) or down.

Variables
max_exp values
Common values for max_exp (for IEEE floating point values)
const uint32	MAXEXP_FLOAT = 0x80
	maximum exponent for 32-bit float
const uint32	MAXEXP_DOUBLE = 0x400
	maximum exponent for 64-bit double
const uint32	MAXEXP_LNGDBL = 0x4000
	maximum exponent for 80-bit long double

Detailed Description

IEEE floating point functions.

Typedef Documentation

◆ eNI

typedef uint16 eNI[IEEE_NI]

There is one more internal format used by IDA to store intermediate values.

0 : sign (0/1)
1 : exponent (based of #IEEE_EXONE). If exp = 0, value = 0.
2 : high word of mantissa (always zero after normalize)

Enumeration Type Documentation

◆ fpvalue_kind_t

enum fpvalue_kind_t

Floating value kinds.

They are useful when checking for NaN/Inf

Enumerator
FPV_BADARG	wrong value of max_exp
FPV_NORM	regular value
FPV_NAN	NaN.
FPV_PINF	positive infinity
FPV_NINF	negative infinity

◆ fpvalue_error_t

enum fpvalue_error_t

Enumerator
REAL_ERROR_OK	no error
REAL_ERROR_FORMAT	realcvt: not supported format for current .idp
REAL_ERROR_RANGE	realcvt: number too big (small) for store (mem NOT modified)
REAL_ERROR_BADDATA	realcvt: illegal real data for load (IEEE data not filled)
REAL_ERROR_FPOVER	floating overflow or underflow
REAL_ERROR_BADSTR	asctoreal: illegal input string
REAL_ERROR_ZERODIV	ediv: divide by 0
REAL_ERROR_INTOVER	eetol*: integer overflow

Function Documentation

◆ ieee_realcvt()

idaman THREAD_SAFE fpvalue_error_t ida_export ieee_realcvt	(	void *	m,
		fpvalue_t *	out,
		uint16	swt )

Standard IEEE 754 floating point conversion function.

Parameters

m	pointer to data
out	internal IEEE format data
swt	operation: 000: load trunc. float (DEC ^F) 2 bytes (m->e) 001: load float 4 bytes (m->e) 003: load double 8 bytes (m->e) 004: load long double 10 bytes (m->e) 005: load long double 12 bytes (m->e) 010: store trunc. float (DEC ^F) 2 bytes (e->m) 011: store float 4 bytes (e->m) 013: store double 8 bytes (e->m) 014: store long double 10 bytes (e->m) 015: store long double 12 bytes (e->m) bit 0x80 forces little endian even for big endian processors

Returns: fpvalue_error_t

◆ realtoasc()

idaman THREAD_SAFE void ida_export realtoasc	(	char *	buf,
		size_t	bufsize,
		const fpvalue_t &	x,
		uint	mode )

◆ asctoreal()

idaman THREAD_SAFE fpvalue_error_t ida_export asctoreal	(	const char **	sss,
		fpvalue_t *	out )

◆ eltoe()

idaman THREAD_SAFE void ida_export eltoe	(	sval_t	l,
		fpvalue_t *	vout )

◆ eltoe64()

idaman THREAD_SAFE void ida_export eltoe64	(	int64	l,
		fpvalue_t *	vout )

◆ eltoe64u()

idaman THREAD_SAFE void ida_export eltoe64u	(	uint64	l,
		fpvalue_t *	vout )

◆ eetol()

idaman THREAD_SAFE fpvalue_error_t ida_export eetol	(	sval_t *	out,
		const fpvalue_t &	a,
		bool	roundflg )

◆ eetol64()

idaman THREAD_SAFE fpvalue_error_t ida_export eetol64	(	int64 *	out,
		const fpvalue_t &	a,
		bool	roundflg )

◆ eetol64u()

idaman THREAD_SAFE fpvalue_error_t ida_export eetol64u	(	uint64 *	out,
		const fpvalue_t &	a,
		bool	roundflg )

◆ eldexp()

idaman THREAD_SAFE fpvalue_error_t ida_export eldexp	(	const fpvalue_t &	a,
		int32	pwr2,
		fpvalue_t *	zout )

◆ eadd()

idaman THREAD_SAFE fpvalue_error_t ida_export eadd	(	const fpvalue_t &	a,
		const fpvalue_t &	b,
		fpvalue_t *	zout,
		bool	subflg )

◆ emul()

idaman THREAD_SAFE fpvalue_error_t ida_export emul	(	const fpvalue_t &	a,
		const fpvalue_t &	b,
		fpvalue_t *	zout )

◆ ediv()

idaman THREAD_SAFE fpvalue_error_t ida_export ediv	(	const fpvalue_t &	a,
		const fpvalue_t &	b,
		fpvalue_t *	zout )

◆ ecmp()

idaman THREAD_SAFE int ida_export ecmp	(	const fpvalue_t &	a,
		const fpvalue_t &	b )

◆ get_fpvalue_kind()

idaman THREAD_SAFE fpvalue_kind_t ida_export get_fpvalue_kind	(	const fpvalue_t &	a,
		uint16	reserved = 0 )

◆ ecleaz()

IEEE_DEPRECATED void ecleaz ( eNI x )

inline

◆ emovo()

idaman IEEE_DEPRECATED THREAD_SAFE void ida_export emovo	(	const eNI	a,
		fpvalue_t *	vout )

◆ emovi()

idaman IEEE_DEPRECATED THREAD_SAFE void ida_export emovi	(	const fpvalue_t &	a,
		eNI	vout )

Move eNI => eNE.

◆ eshift()

idaman IEEE_DEPRECATED THREAD_SAFE int ida_export eshift	(	eNI	x,
		int	sc )

Move eNE => eNI.

◆ emdnorm()

idaman IEEE_DEPRECATED THREAD_SAFE bool ida_export emdnorm	(	eNI	s,
		bool	lost,
		bool	subflg,
		int32	exp,
		int	rndbase )

Shift NI format up (+) or down.

Normalize and round off.

Parameters

s	the internal format number to be rounded
lost	indicates whether or not the number is exact. this is the so-called sticky bit.
subflg	indicates whether the number was obtained by a subtraction operation. In that case if lost is nonzero then the number is slightly smaller than indicated.
exp	the biased exponent, which may be negative. the exponent field of "s" is ignored but is replaced by "exp" as adjusted by normalization and rounding.
rndbase	if 0 => is the rounding control. else is processor defined base (rndprc)

Returns: success

Variable Documentation

◆ MAXEXP_FLOAT

const uint32 MAXEXP_FLOAT = 0x80

maximum exponent for 32-bit float

◆ MAXEXP_DOUBLE

const uint32 MAXEXP_DOUBLE = 0x400

maximum exponent for 64-bit double

◆ MAXEXP_LNGDBL

const uint32 MAXEXP_LNGDBL = 0x4000

maximum exponent for 80-bit long double

Classes

Typedefs

Enumerations

Functions

Variables