Add strtold and wcstold to libmingwex.a
* mingwex/strtold.c: New file. * mingwex/wcstold.c: New file. * mingwex/ldtoa.c: New file. * mingwex/math/cephes_emath.h: New file. * mingwex/math/cephes_emath.c: New file. * mingwex/Makefile.in (DISTFILES): Add new files. (MATH_DISTFILES): Ditto. (STDLIB_OBJS): New. Define as strtold.c wcstold.c. (MATH_OBJS): Add cephes_emath.o. (LIB_OBJS): Add $(STDLIB_OBJS). * include/stdlib.h (strtold, wcstold): Add prototypes. * include/wchar.h (wcstold): Add prototype. Add missing ChangeLog entry for 2002-11-09.
This commit is contained in:
Danny Smith
713
winsup/mingw/mingwex/math/cephes_emath.h
Normal file
713
winsup/mingw/mingwex/math/cephes_emath.h
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@ -0,0 +1,713 @@
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#ifndef _CEPHES_EMATH_H
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#define _CEPHES_EMATH_H
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/* This file is extracted from S L Moshier's ioldoubl.c,
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* modified for use in MinGW
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*
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* Extended precision arithmetic functions for long double I/O.
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* This program has been placed in the public domain.
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*/
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/*
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* Revision history:
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*
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* 5 Jan 84 PDP-11 assembly language version
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* 6 Dec 86 C language version
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* 30 Aug 88 100 digit version, improved rounding
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* 15 May 92 80-bit long double support
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*
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* Author: S. L. Moshier.
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*
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* 6 Oct 02 Modified for MinGW by inlining utility routines,
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* removing global variables, and splitting out strtold
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* from _IO_ldtoa and _IO_ldtostr.
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*
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* Danny Smith <dannysmith@users.sourceforge.net>
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*
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*/
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/* ieee.c
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*
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* Extended precision IEEE binary floating point arithmetic routines
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*
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* Numbers are stored in C language as arrays of 16-bit unsigned
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* short integers. The arguments of the routines are pointers to
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* the arrays.
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*
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*
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* External e type data structure, simulates Intel 8087 chip
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* temporary real format but possibly with a larger significand:
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*
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* NE-1 significand words (least significant word first,
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* most significant bit is normally set)
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* exponent (value = EXONE for 1.0,
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* top bit is the sign)
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*
|
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*
|
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* Internal data structure of a number (a "word" is 16 bits):
|
||||
*
|
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* ei[0] sign word (0 for positive, 0xffff for negative)
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* ei[1] biased __exponent (value = EXONE for the number 1.0)
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* ei[2] high guard word (always zero after normalization)
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* ei[3]
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* to ei[NI-2] significand (NI-4 significand words,
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* most significant word first,
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* most significant bit is set)
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* ei[NI-1] low guard word (0x8000 bit is rounding place)
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*
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*
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*
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* Routines for external format numbers
|
||||
*
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* __asctoe64( string, &d ) ASCII string to long double
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* __asctoeg( string, e, prec ) ASCII string to specified precision
|
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* __e64toe( &d, e ) IEEE long double precision to e type
|
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* __eadd( a, b, c ) c = b + a
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* __eclear(e) e = 0
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||||
* __ecmp (a, b) Returns 1 if a > b, 0 if a == b,
|
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* -1 if a < b, -2 if either a or b is a NaN.
|
||||
* __ediv( a, b, c ) c = b / a
|
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* __efloor( a, b ) truncate to integer, toward -infinity
|
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* __efrexp( a, exp, s ) extract exponent and significand
|
||||
* __eifrac( e, &l, frac ) e to long integer and e type fraction
|
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* __euifrac( e, &l, frac ) e to unsigned long integer and e type fraction
|
||||
* __einfin( e ) set e to infinity, leaving its sign alone
|
||||
* __eldexp( a, n, b ) multiply by 2**n
|
||||
* __emov( a, b ) b = a
|
||||
* __emul( a, b, c ) c = b * a
|
||||
* __eneg(e) e = -e
|
||||
* __eround( a, b ) b = nearest integer value to a
|
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* __esub( a, b, c ) c = b - a
|
||||
* __e24toasc( &f, str, n ) single to ASCII string, n digits after decimal
|
||||
* __e53toasc( &d, str, n ) double to ASCII string, n digits after decimal
|
||||
* __e64toasc( &d, str, n ) long double to ASCII string
|
||||
* __etoasc( e, str, n ) e to ASCII string, n digits after decimal
|
||||
* __etoe24( e, &f ) convert e type to IEEE single precision
|
||||
* __etoe53( e, &d ) convert e type to IEEE double precision
|
||||
* __etoe64( e, &d ) convert e type to IEEE long double precision
|
||||
* __eisneg( e ) 1 if sign bit of e != 0, else 0
|
||||
* __eisinf( e ) 1 if e has maximum exponent (non-IEEE)
|
||||
* or is infinite (IEEE)
|
||||
* __eisnan( e ) 1 if e is a NaN
|
||||
* __esqrt( a, b ) b = square root of a
|
||||
*
|
||||
*
|
||||
* Routines for internal format numbers
|
||||
*
|
||||
* __eaddm( ai, bi ) add significands, bi = bi + ai
|
||||
* __ecleaz(ei) ei = 0
|
||||
* __ecleazs(ei) set ei = 0 but leave its sign alone
|
||||
* __ecmpm( ai, bi ) compare significands, return 1, 0, or -1
|
||||
* __edivm( ai, bi ) divide significands, bi = bi / ai
|
||||
* __emdnorm(ai,l,s,exp) normalize and round off
|
||||
* __emovi( a, ai ) convert external a to internal ai
|
||||
* __emovo( ai, a ) convert internal ai to external a
|
||||
* __emovz( ai, bi ) bi = ai, low guard word of bi = 0
|
||||
* __emulm( ai, bi ) multiply significands, bi = bi * ai
|
||||
* __enormlz(ei) left-justify the significand
|
||||
* __eshdn1( ai ) shift significand and guards down 1 bit
|
||||
* __eshdn8( ai ) shift down 8 bits
|
||||
* __eshdn6( ai ) shift down 16 bits
|
||||
* __eshift( ai, n ) shift ai n bits up (or down if n < 0)
|
||||
* __eshup1( ai ) shift significand and guards up 1 bit
|
||||
* __eshup8( ai ) shift up 8 bits
|
||||
* __eshup6( ai ) shift up 16 bits
|
||||
* __esubm( ai, bi ) subtract significands, bi = bi - ai
|
||||
*
|
||||
*
|
||||
* The result is always normalized and rounded to NI-4 word precision
|
||||
* after each arithmetic operation.
|
||||
*
|
||||
* Exception flags are NOT fully supported.
|
||||
*
|
||||
* Define INFINITY in mconf.h for support of infinity; otherwise a
|
||||
* saturation arithmetic is implemented.
|
||||
*
|
||||
* Define NANS for support of Not-a-Number items; otherwise the
|
||||
* arithmetic will never produce a NaN output, and might be confused
|
||||
* by a NaN input.
|
||||
* If NaN's are supported, the output of ecmp(a,b) is -2 if
|
||||
* either a or b is a NaN. This means asking if(ecmp(a,b) < 0)
|
||||
* may not be legitimate. Use if(ecmp(a,b) == -1) for less-than
|
||||
* if in doubt.
|
||||
* Signaling NaN's are NOT supported; they are treated the same
|
||||
* as quiet NaN's.
|
||||
*
|
||||
* Denormals are always supported here where appropriate (e.g., not
|
||||
* for conversion to DEC numbers).
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||||
*/
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||||
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||||
#include <stdio.h>
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#include <stdlib.h>
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||||
#include <string.h>
|
||||
#include <errno.h>
|
||||
#include <math.h>
|
||||
#include <locale.h>
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||||
#include <ctype.h>
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||||
|
||||
#define alloca __builtin_alloca
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||||
|
||||
/* Don't build non-ANSI _IO_ldtoa. It is not thread safe. */
|
||||
#ifndef USE_LDTOA
|
||||
#define USE_LDTOA 0
|
||||
#endif
|
||||
|
||||
|
||||
/* Number of 16 bit words in external x type format */
|
||||
#define NE 6
|
||||
|
||||
/* Number of 16 bit words in internal format */
|
||||
#define NI (NE+3)
|
||||
|
||||
/* Array offset to exponent */
|
||||
#define E 1
|
||||
|
||||
/* Array offset to high guard word */
|
||||
#define M 2
|
||||
|
||||
/* Number of bits of precision */
|
||||
#define NBITS ((NI-4)*16)
|
||||
|
||||
/* Maximum number of decimal digits in ASCII conversion
|
||||
* = NBITS*log10(2)
|
||||
*/
|
||||
#define NDEC (NBITS*8/27)
|
||||
|
||||
/* The exponent of 1.0 */
|
||||
#define EXONE (0x3fff)
|
||||
|
||||
|
||||
#define mtherr(x,y)
|
||||
|
||||
|
||||
extern long double strtold (const char * __restrict__ s, char ** __restrict__ se);
|
||||
extern int __asctoe64(const char * __restrict__ ss,
|
||||
short unsigned int * __restrict__ y);
|
||||
extern void __emul(const short unsigned int * a,
|
||||
const short unsigned int * b,
|
||||
short unsigned int * c);
|
||||
extern int __ecmp(const short unsigned int * __restrict__ a,
|
||||
const short unsigned int * __restrict__ b);
|
||||
extern int __enormlz(short unsigned int *x);
|
||||
extern int __eshift(short unsigned int *x, int sc);
|
||||
extern void __eaddm(const short unsigned int * __restrict__ x,
|
||||
short unsigned int * __restrict__ y);
|
||||
extern void __esubm(const short unsigned int * __restrict__ x,
|
||||
short unsigned int * __restrict__ y);
|
||||
extern void __emdnorm(short unsigned int *s, int lost, int subflg,
|
||||
long int exp, int rcntrl, const int rndprc);
|
||||
extern void __toe64(short unsigned int * __restrict__ a,
|
||||
short unsigned int * __restrict__ b);
|
||||
extern int __edivm(short unsigned int * __restrict__ den,
|
||||
short unsigned int * __restrict__ num);
|
||||
extern int __emulm(const short unsigned int * __restrict__ a,
|
||||
short unsigned int * __restrict__ b);
|
||||
extern void __emovi(const short unsigned int * __restrict__ a,
|
||||
short unsigned int * __restrict__ b);
|
||||
extern void __emovo(const short unsigned int * __restrict__ a,
|
||||
short unsigned int * __restrict__ b);
|
||||
|
||||
#if USE_LDTOA
|
||||
|
||||
extern char * _IO_ldtoa(long double, int, int, int *, int *, char **);
|
||||
extern void _IO_ldtostr(long double *x, char *string, int ndigs,
|
||||
int flags, char fmt);
|
||||
|
||||
extern void __eiremain(short unsigned int * __restrict__ den,
|
||||
short unsigned int *__restrict__ num,
|
||||
short unsigned int *__restrict__ equot);
|
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extern void __efloor(short unsigned int *x, short unsigned int *y);
|
||||
extern void __eadd1(const short unsigned int * __restrict__ a,
|
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const short unsigned int * __restrict__ b,
|
||||
short unsigned int * __restrict__ c,
|
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int subflg);
|
||||
extern void __esub(const short unsigned int *a, const short unsigned int *b,
|
||||
short unsigned int *c);
|
||||
extern void __ediv(const short unsigned int *a, const short unsigned int *b,
|
||||
short unsigned int *c);
|
||||
extern void __e64toe(short unsigned int *pe, short unsigned int *y);
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|
||||
|
||||
#endif
|
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static __inline__ int __eisneg(const short unsigned int *x);
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||||
static __inline__ int __eisinf(const short unsigned int *x);
|
||||
static __inline__ int __eisnan(const short unsigned int *x);
|
||||
static __inline__ int __eiszero(const short unsigned int *a);
|
||||
static __inline__ void __emovz(register const short unsigned int * __restrict__ a,
|
||||
register short unsigned int * __restrict__ b);
|
||||
static __inline__ void __eclear(register short unsigned int *x);
|
||||
static __inline__ void __ecleaz(register short unsigned int *xi);
|
||||
static __inline__ void __ecleazs(register short unsigned int *xi);
|
||||
static __inline__ int __eiisinf(const short unsigned int *x);
|
||||
static __inline__ int __eiisnan(const short unsigned int *x);
|
||||
static __inline__ int __eiiszero(const short unsigned int *x);
|
||||
static __inline__ void __enan_64(short unsigned int *nan);
|
||||
static __inline__ void __enan_NBITS (short unsigned int *nan);
|
||||
static __inline__ void __enan_NI16 (short unsigned int *nan);
|
||||
static __inline__ void __einfin(register short unsigned int *x);
|
||||
static __inline__ void __eneg(short unsigned int *x);
|
||||
static __inline__ void __eshup1(register short unsigned int *x);
|
||||
static __inline__ void __eshup8(register short unsigned int *x);
|
||||
static __inline__ void __eshup6(register short unsigned int *x);
|
||||
static __inline__ void __eshdn1(register short unsigned int *x);
|
||||
static __inline__ void __eshdn8(register short unsigned int *x);
|
||||
static __inline__ void __eshdn6(register short unsigned int *x);
|
||||
|
||||
|
||||
|
||||
/* Intel IEEE, low order words come first:
|
||||
*/
|
||||
#define IBMPC 1
|
||||
|
||||
/* Define 1 for ANSI C atan2() function
|
||||
* See atan.c and clog.c.
|
||||
*/
|
||||
#define ANSIC 1
|
||||
|
||||
/*define VOLATILE volatile*/
|
||||
#define VOLATILE
|
||||
|
||||
/* For 12-byte long doubles on an i386, pad a 16-bit short 0
|
||||
* to the end of real constants initialized by integer arrays.
|
||||
*
|
||||
* #define XPD 0,
|
||||
*
|
||||
* Otherwise, the type is 10 bytes long and XPD should be
|
||||
* defined blank.
|
||||
*
|
||||
* #define XPD
|
||||
*/
|
||||
#define XPD 0,
|
||||
/* #define XPD */
|
||||
#define NANS
|
||||
#define INFINITY
|
||||
|
||||
/* NaN's require infinity support. */
|
||||
#ifdef NANS
|
||||
#ifndef INFINITY
|
||||
#define INFINITY
|
||||
#endif
|
||||
#endif
|
||||
|
||||
/* This handles 64-bit long ints. */
|
||||
#define LONGBITS (8 * sizeof(long))
|
||||
|
||||
|
||||
#define NTEN 12
|
||||
#define MAXP 4096
|
||||
|
||||
extern const unsigned short __etens[NTEN + 1][NE];
|
||||
|
||||
/*
|
||||
; Clear out entire external format number.
|
||||
;
|
||||
; unsigned short x[];
|
||||
; eclear( x );
|
||||
*/
|
||||
|
||||
static __inline__ void __eclear(register short unsigned int *x)
|
||||
{
|
||||
memset(x, 0, NE * sizeof(unsigned short));
|
||||
}
|
||||
|
||||
|
||||
/* Move external format number from a to b.
|
||||
*
|
||||
* emov( a, b );
|
||||
*/
|
||||
|
||||
static __inline__ void __emov(register const short unsigned int * __restrict__ a,
|
||||
register short unsigned int * __restrict__ b)
|
||||
{
|
||||
memcpy(b, a, NE * sizeof(unsigned short));
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
; Negate external format number
|
||||
;
|
||||
; unsigned short x[NE];
|
||||
; eneg( x );
|
||||
*/
|
||||
|
||||
static __inline__ void __eneg(short unsigned int *x)
|
||||
{
|
||||
|
||||
#ifdef NANS
|
||||
if( __eisnan(x) )
|
||||
return;
|
||||
#endif
|
||||
x[NE-1] ^= 0x8000; /* Toggle the sign bit */
|
||||
}
|
||||
|
||||
|
||||
/* Return 1 if external format number is negative,
|
||||
* else return zero.
|
||||
*/
|
||||
static __inline__ int __eisneg(const short unsigned int *x)
|
||||
{
|
||||
|
||||
#ifdef NANS
|
||||
if( __eisnan(x) )
|
||||
return( 0 );
|
||||
#endif
|
||||
if( x[NE-1] & 0x8000 )
|
||||
return( 1 );
|
||||
else
|
||||
return( 0 );
|
||||
}
|
||||
|
||||
|
||||
/* Return 1 if external format number has maximum possible exponent,
|
||||
* else return zero.
|
||||
*/
|
||||
static __inline__ int __eisinf(const short unsigned int *x)
|
||||
{
|
||||
|
||||
if( (x[NE-1] & 0x7fff) == 0x7fff )
|
||||
{
|
||||
#ifdef NANS
|
||||
if( __eisnan(x) )
|
||||
return( 0 );
|
||||
#endif
|
||||
return( 1 );
|
||||
}
|
||||
else
|
||||
return( 0 );
|
||||
}
|
||||
|
||||
/* Check if e-type number is not a number.
|
||||
*/
|
||||
static __inline__ int __eisnan(const short unsigned int *x)
|
||||
{
|
||||
#ifdef NANS
|
||||
int i;
|
||||
/* NaN has maximum __exponent */
|
||||
if( (x[NE-1] & 0x7fff) == 0x7fff )
|
||||
/* ... and non-zero significand field. */
|
||||
for( i=0; i<NE-1; i++ )
|
||||
{
|
||||
if( *x++ != 0 )
|
||||
return (1);
|
||||
}
|
||||
#endif
|
||||
return (0);
|
||||
}
|
||||
|
||||
/*
|
||||
; Fill __entire number, including __exponent and significand, with
|
||||
; largest possible number. These programs implement a saturation
|
||||
; value that is an ordinary, legal number. A special value
|
||||
; "infinity" may also be implemented; this would require tests
|
||||
; for that value and implementation of special rules for arithmetic
|
||||
; operations involving inifinity.
|
||||
*/
|
||||
|
||||
static __inline__ void __einfin(register short unsigned int *x)
|
||||
{
|
||||
register int i;
|
||||
|
||||
#ifdef INFINITY
|
||||
for( i=0; i<NE-1; i++ )
|
||||
*x++ = 0;
|
||||
*x |= 32767;
|
||||
#else
|
||||
for( i=0; i<NE-1; i++ )
|
||||
*x++ = 0xffff;
|
||||
*x |= 32766;
|
||||
*(x-5) = 0;
|
||||
#endif
|
||||
}
|
||||
|
||||
/* Clear out internal format number.
|
||||
*/
|
||||
|
||||
static __inline__ void __ecleaz(register short unsigned int *xi)
|
||||
{
|
||||
memset(xi, 0, NI * sizeof(unsigned short));
|
||||
}
|
||||
|
||||
/* same, but don't touch the sign. */
|
||||
|
||||
static __inline__ void __ecleazs(register short unsigned int *xi)
|
||||
{
|
||||
++xi;
|
||||
memset(xi, 0, (NI-1) * sizeof(unsigned short));
|
||||
}
|
||||
|
||||
|
||||
|
||||
/* Move internal format number from a to b.
|
||||
*/
|
||||
static __inline__ void __emovz(register const short unsigned int * __restrict__ a,
|
||||
register short unsigned int * __restrict__ b)
|
||||
{
|
||||
memcpy(b, a, (NI-1) * sizeof(unsigned short));
|
||||
b[NI-1]=0;
|
||||
}
|
||||
|
||||
/* Return nonzero if internal format number is a NaN.
|
||||
*/
|
||||
|
||||
static __inline__ int __eiisnan (const short unsigned int *x)
|
||||
{
|
||||
int i;
|
||||
|
||||
if( (x[E] & 0x7fff) == 0x7fff )
|
||||
{
|
||||
for( i=M+1; i<NI; i++ )
|
||||
{
|
||||
if( x[i] != 0 )
|
||||
return(1);
|
||||
}
|
||||
}
|
||||
return(0);
|
||||
}
|
||||
|
||||
/* Return nonzero if external format number is zero. */
|
||||
|
||||
static __inline__ int
|
||||
__eiszero(const short unsigned int * a)
|
||||
{
|
||||
if (*((long double*) a) == 0)
|
||||
return (1);
|
||||
return (0);
|
||||
}
|
||||
|
||||
/* Return nonzero if internal format number is zero. */
|
||||
|
||||
static __inline__ int
|
||||
__eiiszero(const short unsigned int * ai)
|
||||
{
|
||||
int i;
|
||||
/* skip the sign word */
|
||||
for( i=1; i<NI-1; i++ )
|
||||
{
|
||||
if( ai[i] != 0 )
|
||||
return (0);
|
||||
}
|
||||
return (1);
|
||||
}
|
||||
|
||||
|
||||
/* Return nonzero if internal format number is infinite. */
|
||||
|
||||
static __inline__ int
|
||||
__eiisinf (const unsigned short *x)
|
||||
{
|
||||
|
||||
#ifdef NANS
|
||||
if (__eiisnan (x))
|
||||
return (0);
|
||||
#endif
|
||||
if ((x[E] & 0x7fff) == 0x7fff)
|
||||
return (1);
|
||||
return (0);
|
||||
}
|
||||
|
||||
/*
|
||||
; Compare significands of numbers in internal format.
|
||||
; Guard words are included in the comparison.
|
||||
;
|
||||
; unsigned short a[NI], b[NI];
|
||||
; cmpm( a, b );
|
||||
;
|
||||
; for the significands:
|
||||
; returns +1 if a > b
|
||||
; 0 if a == b
|
||||
; -1 if a < b
|
||||
*/
|
||||
static __inline__ int __ecmpm(register const short unsigned int * __restrict__ a,
|
||||
register const short unsigned int * __restrict__ b)
|
||||
{
|
||||
int i;
|
||||
|
||||
a += M; /* skip up to significand area */
|
||||
b += M;
|
||||
for( i=M; i<NI; i++ )
|
||||
{
|
||||
if( *a++ != *b++ )
|
||||
goto difrnt;
|
||||
}
|
||||
return(0);
|
||||
|
||||
difrnt:
|
||||
if( *(--a) > *(--b) )
|
||||
return(1);
|
||||
else
|
||||
return(-1);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
; Shift significand down by 1 bit
|
||||
*/
|
||||
|
||||
static __inline__ void __eshdn1(register short unsigned int *x)
|
||||
{
|
||||
register unsigned short bits;
|
||||
int i;
|
||||
|
||||
x += M; /* point to significand area */
|
||||
|
||||
bits = 0;
|
||||
for( i=M; i<NI; i++ )
|
||||
{
|
||||
if( *x & 1 )
|
||||
bits |= 1;
|
||||
*x >>= 1;
|
||||
if( bits & 2 )
|
||||
*x |= 0x8000;
|
||||
bits <<= 1;
|
||||
++x;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
; Shift significand up by 1 bit
|
||||
*/
|
||||
|
||||
static __inline__ void __eshup1(register short unsigned int *x)
|
||||
{
|
||||
register unsigned short bits;
|
||||
int i;
|
||||
|
||||
x += NI-1;
|
||||
bits = 0;
|
||||
|
||||
for( i=M; i<NI; i++ )
|
||||
{
|
||||
if( *x & 0x8000 )
|
||||
bits |= 1;
|
||||
*x <<= 1;
|
||||
if( bits & 2 )
|
||||
*x |= 1;
|
||||
bits <<= 1;
|
||||
--x;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
; Shift significand down by 8 bits
|
||||
*/
|
||||
|
||||
static __inline__ void __eshdn8(register short unsigned int *x)
|
||||
{
|
||||
register unsigned short newbyt, oldbyt;
|
||||
int i;
|
||||
|
||||
x += M;
|
||||
oldbyt = 0;
|
||||
for( i=M; i<NI; i++ )
|
||||
{
|
||||
newbyt = *x << 8;
|
||||
*x >>= 8;
|
||||
*x |= oldbyt;
|
||||
oldbyt = newbyt;
|
||||
++x;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
; Shift significand up by 8 bits
|
||||
*/
|
||||
|
||||
static __inline__ void __eshup8(register short unsigned int *x)
|
||||
{
|
||||
int i;
|
||||
register unsigned short newbyt, oldbyt;
|
||||
|
||||
x += NI-1;
|
||||
oldbyt = 0;
|
||||
|
||||
for( i=M; i<NI; i++ )
|
||||
{
|
||||
newbyt = *x >> 8;
|
||||
*x <<= 8;
|
||||
*x |= oldbyt;
|
||||
oldbyt = newbyt;
|
||||
--x;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
; Shift significand up by 16 bits
|
||||
*/
|
||||
|
||||
static __inline__ void __eshup6(register short unsigned int *x)
|
||||
{
|
||||
int i;
|
||||
register unsigned short *p;
|
||||
|
||||
p = x + M;
|
||||
x += M + 1;
|
||||
|
||||
for( i=M; i<NI-1; i++ )
|
||||
*p++ = *x++;
|
||||
|
||||
*p = 0;
|
||||
}
|
||||
|
||||
/*
|
||||
; Shift significand down by 16 bits
|
||||
*/
|
||||
|
||||
static __inline__ void __eshdn6(register short unsigned int *x)
|
||||
{
|
||||
int i;
|
||||
register unsigned short *p;
|
||||
|
||||
x += NI-1;
|
||||
p = x + 1;
|
||||
|
||||
for( i=M; i<NI-1; i++ )
|
||||
*(--p) = *(--x);
|
||||
|
||||
*(--p) = 0;
|
||||
}
|
||||
|
||||
/*
|
||||
; Add significands
|
||||
; x + y replaces y
|
||||
*/
|
||||
|
||||
static __inline__ void __enan_64(unsigned short* nan)
|
||||
{
|
||||
static const unsigned short nan64[6]
|
||||
= {0, 0, 0, 0xc000, 0xffff, 0};
|
||||
nan = (unsigned short*) nan64;
|
||||
return;
|
||||
}
|
||||
|
||||
static __inline__ void __enan_NBITS(unsigned short* nan)
|
||||
{
|
||||
int i;
|
||||
for( i=0; i<NE-2; i++ )
|
||||
*nan++ = 0;
|
||||
*nan++ = 0xc000;
|
||||
*nan++ = 0x7fff;
|
||||
return;
|
||||
}
|
||||
|
||||
static __inline__ void __enan_NI16(unsigned short* nan)
|
||||
{
|
||||
int i;
|
||||
*nan++ = 0;
|
||||
*nan = 0x7fff;
|
||||
*nan = 0;
|
||||
*nan = 0xc000;
|
||||
for( i=4; i<NI; i++ )
|
||||
*nan++ = 0;
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
#endif /* _CEPHES_EMATH_H */
|
||||
|
||||
Reference in New Issue
Block a user