NT4/private/crtlib/include/fpieee.h

/***
* fpieee.h - Definitions for floating point IEEE exception handling
*
*	Copyright (c) 1991-1993, Microsoft Corporation.	All rights reserved.
*
*Purpose:
*	This file contains constant and type definitions for handling
*	floating point exceptions [ANSI/IEEE std. 754]
*
*******************************************************************************/

#ifndef _INC_FPIEEE

#ifdef __cplusplus
extern "C" {
#endif

#ifndef _LANGUAGE_ASSEMBLY


/*
 * Conditional macro definition for function calling type and variable type
 * qualifiers.
 */
#if   ( (_MSC_VER >= 800) && (_M_IX86 >= 300) )

/*
 * Definitions for MS C8-32 (386/486) compiler
 */
#define _CRTAPI1 __cdecl
#define _CRTAPI2 __cdecl

#else

/*
 * Other compilers (e.g., MIPS)
 */
#define _CRTAPI1
#define _CRTAPI2

#endif

/*
 * Define floating point IEEE compare result values.
 */

typedef enum {
    _FpCompareEqual,
    _FpCompareGreater,
    _FpCompareLess,
    _FpCompareUnordered
} _FPIEEE_COMPARE_RESULT;

/*
 * Define floating point format and result precision values.
 */

typedef enum {
    _FpFormatFp32,
    _FpFormatFp64,
    _FpFormatFp80,
    _FpFormatFp128,
    _FpFormatI16,
    _FpFormatI32,
    _FpFormatI64,
    _FpFormatU16,
    _FpFormatU32,
    _FpFormatU64,
    _FpFormatBcd80,
    _FpFormatCompare,
    _FpFormatString
} _FPIEEE_FORMAT;

/*
 * Define operation code values.
 *
 * NOTE: If you change this enum, change the #defines below for assembler!
 */

typedef enum {
    _FpCodeUnspecified,
    _FpCodeAdd,
    _FpCodeSubtract,
    _FpCodeMultiply,
    _FpCodeDivide,
    _FpCodeSquareRoot,
    _FpCodeRemainder,
    _FpCodeCompare,
    _FpCodeConvert,
    _FpCodeRound,
    _FpCodeTruncate,
    _FpCodeFloor,
    _FpCodeCeil,
    _FpCodeAcos,
    _FpCodeAsin,
    _FpCodeAtan,
    _FpCodeAtan2,
    _FpCodeCabs,
    _FpCodeCos,
    _FpCodeCosh,
    _FpCodeExp,
    _FpCodeFabs,
    _FpCodeFmod,
    _FpCodeFrexp,
    _FpCodeHypot,
    _FpCodeLdexp,
    _FpCodeLog,
    _FpCodeLog10,
    _FpCodeModf,
    _FpCodePow,
    _FpCodeSin,
    _FpCodeSinh,
    _FpCodeTan,
    _FpCodeTanh,
    _FpCodeY0,
    _FpCodeY1,
    _FpCodeYn,
    _FpCodeLogb,
    _FpCodeNextafter,
    _FpCodeNegate

} _FP_OPERATION_CODE;

#endif  /* _LANGUAGE_ASSEMBLY */




/*
 * Define rounding modes.
 */

#ifndef _LANGUAGE_ASSEMBLY

typedef enum {
    _FpRoundNearest,
    _FpRoundMinusInfinity,
    _FpRoundPlusInfinity,
    _FpRoundChopped
} _FPIEEE_ROUNDING_MODE;

typedef enum {
    _FpPrecisionFull,
    _FpPrecision53,
    _FpPrecision24
} _FPIEEE_PRECISION;


/*
 * Define floating point context record
 */

typedef float		_FP32;
typedef double		_FP64;
typedef short		_I16;
typedef int		_I32;
typedef unsigned short	_U16;
typedef unsigned int	_U32;


typedef struct {
    unsigned short W[5];
} _FP80;

typedef struct {
    unsigned long W[4];
} _FP128;

typedef struct {
    unsigned long W[2];
} _I64;

typedef struct {
    unsigned long W[2];
} _U64;

typedef struct {
    unsigned short W[5];
} _BCD80;


typedef struct {
    union {
	_FP32	     Fp32Value;
	_FP64	     Fp64Value;
	_FP80	     Fp80Value;
	_FP128	     Fp128Value;
	_I16	     I16Value;
	_I32	     I32Value;
	_I64	     I64Value;
	_U16	     U16Value;
	_U32	     U32Value;
	_U64	     U64Value;
	_BCD80	     Bcd80Value;
	char	     *StringValue;
	int	     CompareValue;
    } Value;

    unsigned int OperandValid : 1;
    unsigned int Format : 4;

} _FPIEEE_VALUE;


typedef struct {
    unsigned int Inexact : 1;
    unsigned int Underflow : 1;
    unsigned int Overflow : 1;
    unsigned int ZeroDivide : 1;
    unsigned int InvalidOperation : 1;
} _FPIEEE_EXCEPTION_FLAGS;


typedef struct {
    unsigned int RoundingMode : 2;
    unsigned int Precision : 3;
    unsigned int Operation :12;
    _FPIEEE_EXCEPTION_FLAGS Cause;
    _FPIEEE_EXCEPTION_FLAGS Enable;
    _FPIEEE_EXCEPTION_FLAGS Status;
    _FPIEEE_VALUE Operand1;
    _FPIEEE_VALUE Operand2;
    _FPIEEE_VALUE Result;
} _FPIEEE_RECORD;


struct _EXCEPTION_POINTERS;

/*
 * Floating point IEEE exception filter routine
 */

int _CRTAPI1 _fpieee_flt(unsigned long code,
		struct _EXCEPTION_POINTERS *p,
		int handler(_FPIEEE_RECORD *));

#endif  /* _LANGUAGE_ASSEMBLY */


#ifdef __cplusplus
}
#endif

#define _INC_FPIEEE
#endif	/* _INC_FPIEEE */