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This commit is contained in:
David Schultz 2007-01-03 04:59:33 +00:00
parent 963e8efffe
commit 273147031f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=165746
1 changed files with 27 additions and 25 deletions
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52
contrib/gdtoa/gdtoaimp.h
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@ -35,13 +35,8 @@ THIS SOFTWARE.
double-precision arithmetic (any of IEEE, VAX D_floating,
or IBM mainframe arithmetic).
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
Please send bug reports to David M. Gay (dmg at acm dot org,
with " at " changed at "@" and " dot " changed to ".").
*/
/* On a machine with IEEE extended-precision registers, it is
@ -63,7 +58,7 @@ THIS SOFTWARE.
* biased rounding (add half and chop).
*
* Inspired loosely by William D. Clinger's paper "How to Read Floating
* Point Numbers Accurately" [Proc. ACM SIGPLAN '90, pp. 92-101].
* Point Numbers Accurately" [Proc. ACM SIGPLAN '90, pp. 112-126].
*
* Modifications:
*
@ -134,10 +129,7 @@ THIS SOFTWARE.
* 8-byte pointers, PRIVATE_MEM >= 7400 appears to suffice; with
* 4-byte pointers, PRIVATE_MEM >= 7112 appears adequate.
* #define INFNAN_CHECK on IEEE systems to cause strtod to check for
* Infinity and NaN (case insensitively). On some systems (e.g.,
* some HP systems), it may be necessary to #define NAN_WORD0
* appropriately -- to the most significant word of a quiet NaN.
* (On HP Series 700/800 machines, -DNAN_WORD0=0x7ff40000 works.)
* Infinity and NaN (case insensitively).
* When INFNAN_CHECK is #defined and No_Hex_NaN is not #defined,
* strtodg also accepts (case insensitively) strings of the form
* NaN(x), where x is a string of hexadecimal digits and spaces;
@ -178,6 +170,7 @@ THIS SOFTWARE.
#ifndef GDTOAIMP_H_INCLUDED
#define GDTOAIMP_H_INCLUDED
#include "gdtoa.h"
#include "gd_qnan.h"
#ifdef DEBUG
#include "stdio.h"
@ -558,6 +551,7 @@ extern void memcpy_D2A ANSI((void*, const void*, size_t));
#define hexdig_init_D2A __hexdig_init_D2A
#define hexnan __hexnan_D2A
#define hi0bits __hi0bits_D2A
#define hi0bits_D2A __hi0bits_D2A
#define i2b __i2b_D2A
#define increment __increment_D2A
#define lo0bits __lo0bits_D2A
@ -657,31 +651,39 @@ extern void memcpy_D2A ANSI((void*, const void*, size_t));
#ifdef __cplusplus
}
#endif
/*
* NAN_WORD0 and NAN_WORD1 are only referenced in strtod.c. Prior to
* 20050115, they used to be hard-wired here (to 0x7ff80000 and 0,
* respectively), but now are determined by compiling and running
* qnan.c to generate gd_qnan.h, which specifies d_QNAN0 and d_QNAN1.
* Formerly gdtoaimp.h recommended supplying suitable -DNAN_WORD0=...
* and -DNAN_WORD1=... values if necessary. This should still work.
* (On HP Series 700/800 machines, -DNAN_WORD0=0x7ff40000 works.)
*/
#ifdef IEEE_Arith
#ifdef IEEE_MC68k
#define _0 0
#define _1 1
#ifndef NAN_WORD0
#define NAN_WORD0 d_QNAN0
#endif
#ifndef NAN_WORD1
#define NAN_WORD1 d_QNAN1
#endif
#else
#define _0 1
#define _1 0
#ifndef NAN_WORD0
#define NAN_WORD0 d_QNAN1
#endif
#ifndef NAN_WORD1
#define NAN_WORD1 d_QNAN0
#endif
#endif
#else
#undef INFNAN_CHECK
#endif
#ifdef INFNAN_CHECK
#ifndef NAN_WORD0
#define NAN_WORD0 0x7ff80000
#endif
#ifndef NAN_WORD1
#define NAN_WORD1 0
#endif
#endif /* INFNAN_CHECK */
#undef SI
#ifdef Sudden_Underflow
#define SI 1