freebsd-dev/lib/libc/amd64/gen/infinity.c

/*
 * infinity.c
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <math.h>

/* bytes for +Infinity on a 387 */
const union __infinity_un __infinity = { { 0, 0, 0, 0, 0, 0, 0xf0, 0x7f } };

/* bytes for NaN */
const union __nan_un __nan = { { 0, 0, 0xc0, 0xff } };
First round of changes to clean up the RCSID mess in libc: 1) Changed LIB_SCCS and SYSLIB_SCCS to LIB_RCS and SYSLIB_RCS. 2) Changed sccsid[] variables to rcsid[] 3) Moved all RCSID strings into .text 4) Converted all SCCSID's to RCS $Id$'s 5) Added missing $Id$'s after copyright. 1995-01-23 01:30:24 +00:00			`/*`
			`* infinity.c`
			`*/`
This is weird. I added this, but it went away again! Ummm.. Mumble. I'm confused.. Submitted by: jkh 1994-08-22 09:19:50 +00:00
Fix the style of the SCM ID's. I believe have made all of libc .c's as consistent as possible. 2002-03-22 21:53:29 +00:00			`#include <sys/cdefs.h>`
			`__FBSDID("$FreeBSD$");`

This is weird. I added this, but it went away again! Ummm.. Mumble. I'm confused.. Submitted by: jkh 1994-08-22 09:19:50 +00:00			`#include <math.h>`

			`/* bytes for +Infinity on a 387 */`
Re-apply the previously backed-out commit that fixes the problem where HUGE_VAL is not properly aligned on some architectures. The previous fix now works because the two versions of 'math.h' (include/math.h and lib/msun/src/math.h) have since been merged into one. PR: bin/43544 2002-10-31 23:05:20 +00:00			`const union __infinity_un __infinity = { { 0, 0, 0, 0, 0, 0, 0xf0, 0x7f } };`
Implement fpclassify(): o Add a MD header private to libc called _fpmath.h; this header contains bitfield layouts of MD floating-point types. o Add a MI header private to libc called fpmath.h; this header contains bitfield layouts of MI floating-point types. o Add private libc variables to lib/libc/$arch/gen/infinity.c for storing NaN values. o Add __double_t and __float_t to <machine/_types.h>, and provide double_t and float_t typedefs in <math.h>. o Add some C99 manifest constants (FP_ILOGB0, FP_ILOGBNAN, HUGE_VALF, HUGE_VALL, INFINITY, NAN, and return values for fpclassify()) to <math.h> and others (FLT_EVAL_METHOD, DECIMAL_DIG) to <float.h> via <machine/float.h>. o Add C99 macro fpclassify() which calls __fpclassify{d,f,l}() based on the size of its argument. __fpclassifyl() is never called on alpha because (sizeof(long double) == sizeof(double)), which is good since __fpclassifyl() can't deal with such a small `long double'. This was developed by David Schultz and myself with input from bde and fenner. PR: 23103 Submitted by: David Schultz <dschultz@uclink.Berkeley.EDU> (significant portions) Reviewed by: bde, fenner (earlier versions) 2003-02-08 20:37:55 +00:00
			`/* bytes for NaN */`
			`const union __nan_un __nan = { { 0, 0, 0xc0, 0xff } };`