532 lines
13 KiB
C
532 lines
13 KiB
C
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/***
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*cv.h - definitions for floating point conversion
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*
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* Copyright (c) 1991-1991, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* define types, macros, and constants used in floating point
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* conversion routines
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*
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*Revision History:
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* 7-17-91 GDP initial version
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* 9-21-91 GDP restructured 'ifdef' directives
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* 10-29-91 GDP MIPS port: new defs for ALIGN and DOUBLE
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* 3-03-92 GDP removed os2 16-bit stuff
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* 4-30-92 GDP support intrncvt.c --cleanup and reorganize
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* 5-13-92 XY fixed B_END macros
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* 6-16-92 GDP merged changes from \\orville and \\vangogh trees
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* 9-05-92 GDP included fltintrn.h, new calling convention macros
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* 07-16-93 SRW ALPHA Merge
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* 10-02-94 BWT PPC merge
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*
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*******************************************************************************/
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#ifndef _INC_CV
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <cruntime.h>
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/*
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* Conditional macro definition for function calling type and variable type
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* qualifiers.
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*/
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#if ( (_MSC_VER >= 800) && (_M_IX86 >= 300) )
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/*
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* Definitions for MS C8-32 (386/486) compiler
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*/
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#define _CRTAPI1 __cdecl
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#define _CRTAPI2 __cdecl
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#elif ( _MSC_VER == 600 )
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/*
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* Definitions for old MS C6-386 compiler
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*/
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#define _CRTAPI1 _cdecl
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#define _CRTAPI2 _cdecl
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#define _CRTVAR1 _cdecl
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#define _M_IX86 300
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#else
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/*
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* Other compilers (e.g., MIPS)
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*/
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#define _CRTAPI1
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#define _CRTAPI2
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#define _CRTVAR1
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#endif
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/*
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* For MIPS and Alpha, define DOUBLE as 'double'
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* so that the definition in fltintrn.h is not used.
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* This is done because floating point arguments are passed in the
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* fp register.
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*/
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#if defined(_M_MRX000) || defined(_M_ALPHA) || defined(_M_PPC)
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#define DOUBLE double
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#endif
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#include <fltintrn.h>
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/* define little endian or big endian memory */
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#ifdef i386
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#define L_END
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#endif
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#if defined(_M_MRX000) || defined(_M_ALPHA) || defined(_M_PPC)
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#define L_END
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#endif
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typedef unsigned char u_char; /* should have 1 byte */
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typedef char s_char; /* should have 1 byte */
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typedef unsigned short u_short; /* should have 2 bytes */
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typedef signed short s_short; /* should have 2 bytes */
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typedef unsigned int u_long; /* sholuld have 4 bytes */
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typedef int s_long; /* sholuld have 4 bytes */
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/* calling conventions */
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#define _CALLTYPE5
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/*
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* defining _LDSUPPORT enables using long double computations
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* for string conversion. We do not do this even for i386,
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* since we want to avoid using floating point code that
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* may generate IEEE exceptions.
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*
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* Currently our string conversion routines do not conform
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* to the special requirements of the IEEE standard for
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* floating point conversions
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*/
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#ifndef _LDSUPPORT
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#pragma pack(4)
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typedef struct {
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u_char ld[10];
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} _LDOUBLE;
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#pragma pack()
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#define PTR_LD(x) ((u_char *)(&(x)->ld))
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#else
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typedef long double _LDOUBLE;
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#define PTR_LD(x) ((u_char *)(x))
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#endif
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#pragma pack(4)
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typedef struct {
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u_char ld12[12];
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} _LDBL12;
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#pragma pack()
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typedef struct {
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float f;
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} FLOAT;
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/*
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* return values for internal conversion routines
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* (12-byte to long double, double, or float)
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*/
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typedef enum {
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INTRNCVT_OK,
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INTRNCVT_OVERFLOW,
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INTRNCVT_UNDERFLOW
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} INTRNCVT_STATUS;
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/*
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* return values for strgtold12 routine
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*/
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#define SLD_UNDERFLOW 1
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#define SLD_OVERFLOW 2
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#define SLD_NODIGITS 4
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#define MAX_MAN_DIGITS 21
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/* specifies '%f' format */
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#define SO_FFORMAT 1
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typedef struct _FloatOutStruct {
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short exp;
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char sign;
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char ManLen;
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char man[MAX_MAN_DIGITS+1];
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} FOS;
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#define PTR_12(x) ((u_char *)(&(x)->ld12))
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#define MAX_USHORT ((u_short)0xffff)
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#define MSB_USHORT ((u_short)0x8000)
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#define MAX_ULONG ((u_long)0xffffffff)
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#define MSB_ULONG ((u_long)0x80000000)
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#define TMAX10 5200 /* maximum temporary decimal exponent */
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#define TMIN10 -5200 /* minimum temporary decimal exponent */
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#define LD_MAX_EXP_LEN 4 /* maximum number of decimal exponent digits */
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#define LD_MAX_MAN_LEN 24 /* maximum length of mantissa (decimal)*/
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#define LD_MAX_MAN_LEN1 25 /* MAX_MAN_LEN+1 */
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#define LD_BIAS 0x3fff /* exponent bias for long double */
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#define LD_BIASM1 0x3ffe /* LD_BIAS - 1 */
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#define LD_MAXEXP 0x7fff /* maximum biased exponent */
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#define D_BIAS 0x3ff /* exponent bias for double */
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#define D_BIASM1 0x3fe /* D_BIAS - 1 */
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#define D_MAXEXP 0x7ff /* maximum biased exponent */
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#ifdef M68K
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typedef struct _fltl /* used by _fltinl */
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{
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int flags;
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int nbytes; /* number of characters read */
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long lval;
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_LDOUBLE ldval; /* the returned floating point number */
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}
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*FLTL;
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#endif
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#ifdef M68K
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char *_clftole(long double *, char *, int, int);
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char *_clftolf(long double *, char *, int);
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char * _CALLTYPE2 _clftolg(long double *, char *, int, int);
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void _CALLTYPE2 _cldcvt( long double *, char *, int, int, int);
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#endif
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#ifndef MTHREAD
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#ifdef M68K
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FLTL _CALLTYPE2 _fltinl( const char *, int, int, int);
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STRFLT _CALLTYPE2 _lfltout(long double);
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#define _IS_MAN_IND(signbit, manhi, manlo) \
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((signbit) && (manhi)==0xc0000000 && (manlo)==0)
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#define _IS_MAN_QNAN(signbit, manhi, manlo) \
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( (manhi)&NAN_BIT )
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#define _IS_MAN_SNAN(signbit, manhi, manlo) \
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(!( _IS_MAN_INF(signbit, manhi, manlo) || \
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_IS_MAN_QNAN(signbit, manhi, manlo) ))
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#endif
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#endif
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/*
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* end of definitions from crt32\h\fltintrn.h
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*/
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/* Recognizing special patterns in the mantissa field */
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#define _EXP_SP 0x7fff
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#define NAN_BIT (1<<30)
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#define _IS_MAN_INF(signbit, manhi, manlo) \
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( (manhi)==MSB_ULONG && (manlo)==0x0 )
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// i386 and Alpha use same NaN format
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#if defined(_M_IX86) || defined(_M_ALPHA)
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#define _IS_MAN_IND(signbit, manhi, manlo) \
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((signbit) && (manhi)==0xc0000000 && (manlo)==0)
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#define _IS_MAN_QNAN(signbit, manhi, manlo) \
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( (manhi)&NAN_BIT )
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#define _IS_MAN_SNAN(signbit, manhi, manlo) \
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(!( _IS_MAN_INF(signbit, manhi, manlo) || \
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_IS_MAN_QNAN(signbit, manhi, manlo) ))
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#elif defined(_M_MRX000) || defined(_M_PPC)
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#define _IS_MAN_IND(signbit, manhi, manlo) \
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(!(signbit) && (manhi)==0xbfffffff && (manlo)==0xfffff800)
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#define _IS_MAN_SNAN(signbit, manhi, manlo) \
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( (manhi)&NAN_BIT )
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#define _IS_MAN_QNAN(signbit, manhi, manlo) \
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(!( _IS_MAN_INF(signbit, manhi, manlo) || \
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_IS_MAN_SNAN(signbit, manhi, manlo) ))
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#endif
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#if defined (L_END) && !( defined(_M_MRX000) || defined(_M_ALPHA) || defined(_M_PPC) )
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/* "little endian" memory */
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/* Note: MIPS and Alpha have alignment requirements and have different macros */
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/*
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* Manipulation of a 12-byte long double number (an ordinary
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* 10-byte long double plus two extra bytes of mantissa).
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*/
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/*
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* byte layout:
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*
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* +-----+--------+--------+-------+
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* |XT(2)|MANLO(4)|MANHI(4)|EXP(2) |
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* +-----+--------+--------+-------+
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* |<-UL_LO->|<-UL_MED->|<-UL_HI ->|
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* (4) (4) (4)
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*/
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/* a pointer to the exponent/sign portion */
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#define U_EXP_12(p) ((u_short *)(PTR_12(p)+10))
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/* a pointer to the 4 hi-order bytes of the mantissa */
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#define UL_MANHI_12(p) ((u_long *)(PTR_12(p)+6))
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/* a pointer to the 4 lo-order bytes of the ordinary (8-byte) mantissa */
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#define UL_MANLO_12(p) ((u_long *)(PTR_12(p)+2))
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/* a pointer to the 2 extra bytes of the mantissa */
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#define U_XT_12(p) ((u_short *)PTR_12(p))
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/* a pointer to the 4 lo-order bytes of the extended (10-byte) mantissa */
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#define UL_LO_12(p) ((u_long *)PTR_12(p))
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/* a pointer to the 4 mid-order bytes of the extended (10-byte) mantissa */
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#define UL_MED_12(p) ((u_long *)(PTR_12(p)+4))
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/* a pointer to the 4 hi-order bytes of the extended long double */
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#define UL_HI_12(p) ((u_long *)(PTR_12(p)+8))
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/* a pointer to the byte of order i (LSB=0, MSB=9)*/
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#define UCHAR_12(p,i) ((u_char *)PTR_12(p)+(i))
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/* a pointer to a u_short with offset i */
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#define USHORT_12(p,i) ((u_short *)((u_char *)PTR_12(p)+(i)))
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/* a pointer to a u_long with offset i */
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#define ULONG_12(p,i) ((u_long *)((u_char *)PTR_12(p)+(i)))
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/* a pointer to the 10 MSBytes of a 12-byte long double */
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#define TEN_BYTE_PART(p) ((u_char *)PTR_12(p)+2)
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/*
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* Manipulation of a 10-byte long double number
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*/
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#define U_EXP_LD(p) ((u_short *)(PTR_LD(p)+8))
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#define UL_MANHI_LD(p) ((u_long *)(PTR_LD(p)+4))
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#define UL_MANLO_LD(p) ((u_long *)PTR_LD(p))
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/*
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* Manipulation of a 64bit IEEE double
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*/
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#define U_SHORT4_D(p) ((u_short *)(p) + 3)
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#define UL_HI_D(p) ((u_long *)(p) + 1)
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#define UL_LO_D(p) ((u_long *)(p))
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#endif
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/* big endian */
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#if defined (B_END)
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/*
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* byte layout:
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*
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* +------+-------+---------+------+
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* |EXP(2)|MANHI(4)|MANLO(4)|XT(2) |
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* +------+-------+---------+------+
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* |<-UL_HI->|<-UL_MED->|<-UL_LO ->|
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* (4) (4) (4)
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*/
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#define U_EXP_12(p) ((u_short *)PTR_12(p))
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#define UL_MANHI_12(p) ((u_long *)(PTR_12(p)+2))
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#define UL_MANLO_12(p) ((u_long *)(PTR_12(p)+6))
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#define U_XT_12(p) ((u_short *)(PTR_12(p)+10))
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#define UL_LO_12(p) ((u_long *)(PTR_12(p)+8))
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#define UL_MED_12(p) ((u_long *)(PTR_12(p)+4))
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#define UL_HI_12(p) ((u_long *)PTR_12(p))
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#define UCHAR_12(p,i) ((u_char *)PTR_12(p)+(11-(i)))
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#define USHORT_12(p,i) ((u_short *)((u_char *)PTR_12(p)+10-(i)))
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#define ULONG_12(p,i) ((u_long *)((u_char *)PTR_12(p)+8-(i)))
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#define TEN_BYTE_PART(p) (u_char *)PTR_12(p)
|
||
|
|
|
||
|
|
#define U_EXP_LD(p) ((u_short *)PTR_LD(p))
|
||
|
|
#define UL_MANHI_LD(p) ((u_long *)(PTR_LD(p)+2))
|
||
|
|
#define UL_MANLO_LD(p) ((u_long *)(PTR_LD(p)+6))
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Manipulation of a 64bit IEEE double
|
||
|
|
*/
|
||
|
|
#define U_SHORT4_D(p) ((u_short *)(p))
|
||
|
|
#define UL_HI_D(p) ((u_long *)(p))
|
||
|
|
#define UL_LO_D(p) ((u_long *)(p) + 1)
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if defined(_M_MRX000) || defined(_M_ALPHA) || defined(_M_PPC)
|
||
|
|
|
||
|
|
#define ALIGN(x) ( (unsigned long __unaligned *) (x))
|
||
|
|
|
||
|
|
#define U_EXP_12(p) ((u_short *)(PTR_12(p)+10))
|
||
|
|
|
||
|
|
#define UL_MANHI_12(p) ((u_long __unaligned *) (PTR_12(p)+6) )
|
||
|
|
#define UL_MANLO_12(p) ((u_long __unaligned *) (PTR_12(p)+2) )
|
||
|
|
|
||
|
|
|
||
|
|
#define U_XT_12(p) ((u_short *)PTR_12(p))
|
||
|
|
#define UL_LO_12(p) ((u_long *)PTR_12(p))
|
||
|
|
#define UL_MED_12(p) ((u_long *)(PTR_12(p)+4))
|
||
|
|
#define UL_HI_12(p) ((u_long *)(PTR_12(p)+8))
|
||
|
|
|
||
|
|
/* the following 3 macros do not take care of proper alignment */
|
||
|
|
#define UCHAR_12(p,i) ((u_char *)PTR_12(p)+(i))
|
||
|
|
#define USHORT_12(p,i) ((u_short *)((u_char *)PTR_12(p)+(i)))
|
||
|
|
#define ULONG_12(p,i) ((u_long *) ((u_char *)PTR_12(p)+(i) ))
|
||
|
|
|
||
|
|
#define TEN_BYTE_PART(p) ((u_char *)PTR_12(p)+2)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Manipulation of a 10-byte long double number
|
||
|
|
*/
|
||
|
|
#define U_EXP_LD(p) ((u_short *)(PTR_LD(p)+8))
|
||
|
|
|
||
|
|
#define UL_MANHI_LD(p) ((u_long *) (PTR_LD(p)+4) )
|
||
|
|
#define UL_MANLO_LD(p) ((u_long *) PTR_LD(p) )
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Manipulation of a 64bit IEEE double
|
||
|
|
*/
|
||
|
|
#define U_SHORT4_D(p) ((u_short *)(p) + 3)
|
||
|
|
#define UL_HI_D(p) ((u_long *)(p) + 1)
|
||
|
|
#define UL_LO_D(p) ((u_long *)(p))
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
#define PUT_INF_12(p,sign) \
|
||
|
|
*UL_HI_12(p) = (sign)?0xffff8000:0x7fff8000; \
|
||
|
|
*UL_MED_12(p) = 0; \
|
||
|
|
*UL_LO_12(p) = 0;
|
||
|
|
|
||
|
|
#define PUT_ZERO_12(p) *UL_HI_12(p) = 0; \
|
||
|
|
*UL_MED_12(p) = 0; \
|
||
|
|
*UL_LO_12(p) = 0;
|
||
|
|
|
||
|
|
#define ISZERO_12(p) ((*UL_HI_12(p)&0x7fffffff) == 0 && \
|
||
|
|
*UL_MED_12(p) == 0 && \
|
||
|
|
*UL_LO_12(p) == 0 )
|
||
|
|
|
||
|
|
#define PUT_INF_LD(p,sign) \
|
||
|
|
*U_EXP_LD(p) = (sign)?0xffff:0x7fff; \
|
||
|
|
*UL_MANHI_LD(p) = 0x8000; \
|
||
|
|
*UL_MANLO_LD(p) = 0;
|
||
|
|
|
||
|
|
#define PUT_ZERO_LD(p) *U_EXP_LD(p) = 0; \
|
||
|
|
*UL_MANHI_LD(p) = 0; \
|
||
|
|
*UL_MANLO_LD(p) = 0;
|
||
|
|
|
||
|
|
#define ISZERO_LD(p) ((*U_EXP_LD(p)&0x7fff) == 0 && \
|
||
|
|
*UL_MANHI_LD(p) == 0 && \
|
||
|
|
*UL_MANLO_LD(p) == 0 )
|
||
|
|
|
||
|
|
|
||
|
|
/*********************************************************
|
||
|
|
*
|
||
|
|
* Function Prototypes
|
||
|
|
*
|
||
|
|
*********************************************************/
|
||
|
|
|
||
|
|
/* from mantold.c */
|
||
|
|
void _CALLTYPE5 __mtold12(char *manptr, unsigned manlen,_LDBL12 *ld12);
|
||
|
|
int _CALLTYPE5 __addl(u_long x, u_long y, u_long *sum);
|
||
|
|
void _CALLTYPE5 __shl_12(_LDBL12 *ld12);
|
||
|
|
void _CALLTYPE5 __shr_12(_LDBL12 *ld12);
|
||
|
|
void _CALLTYPE5 __add_12(_LDBL12 *x, _LDBL12 *y);
|
||
|
|
|
||
|
|
/* from tenpow.c */
|
||
|
|
void _CALLTYPE5 __multtenpow12(_LDBL12 *pld12,int pow, unsigned mult12);
|
||
|
|
void _CALLTYPE5 __ld12mul(_LDBL12 *px, _LDBL12 *py);
|
||
|
|
|
||
|
|
/* from strgtold.c */
|
||
|
|
unsigned int __strgtold12(_LDBL12 *pld12,
|
||
|
|
const char * *p_end_ptr,
|
||
|
|
const char * str,
|
||
|
|
int mult12,
|
||
|
|
int scale,
|
||
|
|
int decpt,
|
||
|
|
int implicit_E);
|
||
|
|
|
||
|
|
unsigned _CALLTYPE5 __STRINGTOLD(_LDOUBLE *pld,
|
||
|
|
const char * *p_end_ptr,
|
||
|
|
const char *str,
|
||
|
|
int mult12);
|
||
|
|
|
||
|
|
|
||
|
|
/* from x10fout.c */
|
||
|
|
/* this is defined as void in convert.h
|
||
|
|
* After porting the asm files to c, we need a return value for
|
||
|
|
* i10_output, that used to reside in reg. ax
|
||
|
|
*/
|
||
|
|
int _CALLTYPE5 $I10_OUTPUT(_LDOUBLE ld, int ndigits,
|
||
|
|
unsigned output_flags, FOS *fos);
|
||
|
|
|
||
|
|
|
||
|
|
/* for cvt.c and fltused.c */
|
||
|
|
/* The following functions are #defined as macros in fltintrn.h */
|
||
|
|
#undef _cfltcvt
|
||
|
|
#undef _cropzeros
|
||
|
|
#undef _fassign
|
||
|
|
#undef _forcdecpt
|
||
|
|
#undef _positive
|
||
|
|
|
||
|
|
void _CALLTYPE2 _cfltcvt(double *arg, char *buffer,
|
||
|
|
int format, int precision,
|
||
|
|
int caps);
|
||
|
|
void _CALLTYPE2 _cropzeros(char *buf);
|
||
|
|
void _CALLTYPE2 _fassign(int flag, char *argument, char *number);
|
||
|
|
void _CALLTYPE2 _forcdecpt(char *buf);
|
||
|
|
int _CALLTYPE2 _positive(double *arg);
|
||
|
|
|
||
|
|
/* from intrncvt.c */
|
||
|
|
void _atodbl(DOUBLE *d, char *str);
|
||
|
|
void _atoldbl(_LDOUBLE *ld, char *str);
|
||
|
|
void _atoflt(FLOAT *f, char *str);
|
||
|
|
INTRNCVT_STATUS _ld12tod(_LDBL12 *ifp, DOUBLE *d);
|
||
|
|
INTRNCVT_STATUS _ld12tof(_LDBL12 *ifp, FLOAT *f);
|
||
|
|
INTRNCVT_STATUS _ld12told(_LDBL12 *ifp, _LDOUBLE *ld);
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define _INC_CV
|
||
|
|
#endif /* _INC_CV */
|