ieee.h File Reference

Detailed Description

IEEE floating point functions.

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

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. More...
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)

Macros
#define	FPVAL_NWORDS   8
	number of words in fpvalue_t
#define	IEEE_EXONE   (0x3FFF)
	The exponent of 1.0.
#define	E_SPECIAL_EXP   0x7FFF
	Exponent in fpvalue_t for NaN and Inf.

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 }

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

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