8cf5ed5125
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/$arch/gen/infinity.c for
storing NaN values.
o Add __double_t and __float_t to <machine/_types.h>, and provide
double_t and float_t typedefs in <math.h>.
o Add some C99 manifest constants (FP_ILOGB0, FP_ILOGBNAN, HUGE_VALF,
HUGE_VALL, INFINITY, NAN, and return values for fpclassify()) to
<math.h> and others (FLT_EVAL_METHOD, DECIMAL_DIG) to <float.h> via
<machine/float.h>.
o Add C99 macro fpclassify() which calls __fpclassify{d,f,l}() based
on the size of its argument. __fpclassifyl() is never called on
alpha because (sizeof(long double) == sizeof(double)), which is good
since __fpclassifyl() can't deal with such a small `long double'.
This was developed by David Schultz and myself with input from bde and
fenner.
PR: 23103
Submitted by: David Schultz <dschultz@uclink.Berkeley.EDU>
(significant portions)
Reviewed by: bde, fenner (earlier versions)
18 lines
437 B
C
18 lines
437 B
C
#include <sys/cdefs.h>
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#if 0
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: infinity.c,v 1.2 1998/11/14 19:31:02 christos Exp $");
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#endif /* LIBC_SCCS and not lint */
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#endif
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__FBSDID("$FreeBSD$");
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/* infinity.c */
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#include <math.h>
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/* bytes for +Infinity on powerpc */
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const union __infinity_un __infinity = { { 0x7f, 0xf0, 0, 0, 0, 0, 0, 0 } };
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/* bytes for NaN */
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const union __nan_un __nan = { { 0xff, 0xc0, 0, 0 } };
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