mirror of https://github.com/yasm/yasm.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
120 lines
2.8 KiB
120 lines
2.8 KiB
/**************************************************************** |
|
|
|
The author of this software is David M. Gay. |
|
|
|
Copyright (C) 1998, 2000 by Lucent Technologies |
|
All Rights Reserved |
|
|
|
Permission to use, copy, modify, and distribute this software and |
|
its documentation for any purpose and without fee is hereby |
|
granted, provided that the above copyright notice appear in all |
|
copies and that both that the copyright notice and this |
|
permission notice and warranty disclaimer appear in supporting |
|
documentation, and that the name of Lucent or any of its entities |
|
not be used in advertising or publicity pertaining to |
|
distribution of the software without specific, written prior |
|
permission. |
|
|
|
LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
|
INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. |
|
IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY |
|
SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
|
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER |
|
IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, |
|
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF |
|
THIS SOFTWARE. |
|
|
|
****************************************************************/ |
|
|
|
/* Please send bug reports to |
|
David M. Gay |
|
Bell Laboratories, Room 2C-463 |
|
600 Mountain Avenue |
|
Murray Hill, NJ 07974-0636 |
|
U.S.A. |
|
dmg@bell-labs.com |
|
*/ |
|
|
|
#include "gdtoaimp.h" |
|
|
|
#undef _0 |
|
#undef _1 |
|
|
|
/* one or the other of IEEE_MC68k or IEEE_8087 should be #defined */ |
|
|
|
#ifdef IEEE_MC68k |
|
#define _0 0 |
|
#define _1 1 |
|
#define _2 2 |
|
#define _3 3 |
|
#endif |
|
#ifdef IEEE_8087 |
|
#define _0 3 |
|
#define _1 2 |
|
#define _2 1 |
|
#define _3 0 |
|
#endif |
|
|
|
char* |
|
#ifdef KR_headers |
|
g_Qfmt(buf, V, ndig, bufsize) char *buf; char *V; int ndig; unsigned bufsize; |
|
#else |
|
g_Qfmt(char *buf, void *V, int ndig, unsigned bufsize) |
|
#endif |
|
{ |
|
static FPI fpi = { 113, 1-16383-113+1, 32766 - 16383 - 113 + 1, 1, 0 }; |
|
char *b, *s, *se; |
|
ULong bits[4], *L, sign; |
|
int decpt, ex, i, mode; |
|
|
|
if (ndig < 0) |
|
ndig = 0; |
|
if (bufsize < ndig + 10) |
|
return 0; |
|
|
|
L = (ULong*)V; |
|
sign = L[_0] & 0x80000000L; |
|
bits[3] = L[_0] & 0xffff; |
|
bits[2] = L[_1]; |
|
bits[1] = L[_2]; |
|
bits[0] = L[_3]; |
|
b = buf; |
|
if ( (ex = (L[_0] & 0x7fff0000L) >> 16) !=0) { |
|
if (ex == 0x7fff) { |
|
/* Infinity or NaN */ |
|
if (bits[0] | bits[1] | bits[2] | bits[3]) |
|
b = strcpy(b, "NaN"); |
|
else { |
|
b = buf; |
|
if (sign) |
|
*b++ = '-'; |
|
b = strcp(b, "Infinity"); |
|
} |
|
return b; |
|
} |
|
i = STRTOG_Normal; |
|
bits[3] |= 0x10000; |
|
} |
|
else if (bits[0] | bits[1] | bits[2] | bits[3]) { |
|
i = STRTOG_Denormal; |
|
ex = 1; |
|
} |
|
else { |
|
#ifndef IGNORE_ZERO_SIGN |
|
if (sign) |
|
*b++ = '-'; |
|
#endif |
|
*b++ = '0'; |
|
*b = 0; |
|
return b; |
|
} |
|
ex -= 0x3fff + 112; |
|
mode = 2; |
|
if (ndig <= 0) { |
|
if (bufsize < 48) |
|
return 0; |
|
mode = 0; |
|
} |
|
s = gdtoa(&fpi, ex, bits, &i, mode, ndig, &decpt, &se); |
|
return g__fmt(buf, s, se, decpt, sign); |
|
}
|
|
|