Implement and document nan(), nanf(), and nanl(). This commit
adds two new directories in msun: ld80 and ld128. These are for long double functions specific to the 80-bit long double format used on x86-derived architectures, and the 128-bit format used on sparc64, respectively.
This commit is contained in:
parent
e34f6b7311
commit
4b6b574455
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=174684
@ -86,8 +86,28 @@ For hexadecimal constants, the scaling is instead done by powers
|
||||
of 2.
|
||||
.Pp
|
||||
Alternatively, if the portion of the string following the optional
|
||||
plus or minus sign begins with ``INFINITY'' or ``NAN'', ignoring
|
||||
case, it is interpreted as an infinity or a quiet NaN, respectively.
|
||||
plus or minus sign begins with
|
||||
.Dq INFINITY
|
||||
or
|
||||
.Dq NAN ,
|
||||
ignoring case, it is interpreted as an infinity or a quiet \*(Na,
|
||||
respectively.
|
||||
The syntax
|
||||
.Dq Xo Pf NAN( Ar "s" ) Xc ,
|
||||
where
|
||||
.Ar s
|
||||
is an alphanumeric string, produces the same value as the call
|
||||
.Fo nan
|
||||
.Qq Ar s Ns
|
||||
.Fc
|
||||
(respectively,
|
||||
.Fo nanf
|
||||
.Qq Ar s Ns
|
||||
.Fc
|
||||
and
|
||||
.Fo nanl
|
||||
.Qq Ar s Ns
|
||||
.Fc . )
|
||||
.Pp
|
||||
In any of the above cases, leading white-space characters in the
|
||||
string (as defined by the
|
||||
@ -140,6 +160,7 @@ Overflow or underflow occurred.
|
||||
.Xr atof 3 ,
|
||||
.Xr atoi 3 ,
|
||||
.Xr atol 3 ,
|
||||
.Xr nan 3 ,
|
||||
.Xr strtol 3 ,
|
||||
.Xr strtoul 3 ,
|
||||
.Xr wcstod 3
|
||||
@ -177,5 +198,3 @@ IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
|
||||
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
|
||||
THIS SOFTWARE.
|
||||
.Ed
|
||||
.Sh BUGS
|
||||
These routines do not recognize the C99 ``NaN(...)'' syntax.
|
||||
|
@ -24,6 +24,13 @@ ARCH_SUBDIR= ${MACHINE_ARCH}
|
||||
.PATH: ${.CURDIR}/man
|
||||
.PATH: ${.CURDIR}/src
|
||||
|
||||
# long double format
|
||||
.if ${LDBL_PREC} == 64
|
||||
.PATH: ${.CURDIR}/ld80
|
||||
.elif ${LDBL_PREC} == 113
|
||||
.PATH: ${.CURDIR}/ld128
|
||||
.endif
|
||||
|
||||
LIB= m
|
||||
SHLIBDIR?= /lib
|
||||
SHLIB_MAJOR= 5
|
||||
@ -51,7 +58,7 @@ COMMON_SRCS= b_exp.c b_log.c b_tgamma.c \
|
||||
s_llrint.c s_llrintf.c s_llround.c s_llroundf.c s_llroundl.c \
|
||||
s_log1p.c s_log1pf.c s_logb.c s_logbf.c s_lrint.c s_lrintf.c \
|
||||
s_lround.c s_lroundf.c s_lroundl.c s_modff.c \
|
||||
s_nearbyint.c s_nextafter.c s_nextafterf.c \
|
||||
s_nan.c s_nearbyint.c s_nextafter.c s_nextafterf.c \
|
||||
s_nexttowardf.c s_remquo.c s_remquof.c \
|
||||
s_rint.c s_rintf.c s_round.c s_roundf.c s_roundl.c \
|
||||
s_scalbln.c s_scalbn.c s_scalbnf.c s_signbit.c \
|
||||
@ -71,7 +78,8 @@ SYMBOL_MAPS= ${SYM_MAPS}
|
||||
COMMON_SRCS+= s_copysignl.c s_fabsl.c s_modfl.c
|
||||
.if ${LDBL_PREC} != 53
|
||||
# If long double != double use these; otherwise, we alias the double versions.
|
||||
COMMON_SRCS+= s_fmal.c s_frexpl.c s_nextafterl.c s_nexttoward.c s_scalbnl.c
|
||||
COMMON_SRCS+= s_fmal.c s_frexpl.c s_nanl.c s_nextafterl.c s_nexttoward.c \
|
||||
s_scalbnl.c
|
||||
.endif
|
||||
|
||||
# C99 complex functions
|
||||
@ -98,7 +106,7 @@ MAN= acos.3 acosh.3 asin.3 asinh.3 atan.3 atan2.3 atanh.3 ceil.3 \
|
||||
feclearexcept.3 feenableexcept.3 fegetenv.3 \
|
||||
fegetround.3 fenv.3 floor.3 \
|
||||
fma.3 fmax.3 fmod.3 hypot.3 ieee.3 ieee_test.3 ilogb.3 j0.3 \
|
||||
lgamma.3 lrint.3 lround.3 math.3 nextafter.3 remainder.3 rint.3 \
|
||||
lgamma.3 lrint.3 lround.3 math.3 nan.3 nextafter.3 remainder.3 rint.3 \
|
||||
round.3 scalbn.3 signbit.3 sin.3 sinh.3 sqrt.3 tan.3 tanh.3 trunc.3
|
||||
|
||||
MLINKS+=acos.3 acosf.3
|
||||
@ -145,6 +153,7 @@ MLINKS+=lgamma.3 gamma.3 lgamma.3 gammaf.3 lgamma.3 lgammaf.3 lgamma.3 tgamma.3
|
||||
MLINKS+=lrint.3 llrint.3 lrint.3 llrintf.3 lrint.3 lrintf.3
|
||||
MLINKS+=lround.3 llround.3 lround.3 llroundf.3 lround.3 llroundl.3 \
|
||||
lround.3 lroundf.3 lround.3 lroundl.3
|
||||
MLINKS+=nan.3 nanf.3 nan.3 nanl.3
|
||||
MLINKS+=nextafter.3 nextafterf.3 nextafter.3 nextafterl.3
|
||||
MLINKS+=nextafter.3 nexttoward.3 nextafter.3 nexttowardf.3
|
||||
MLINKS+=nextafter.3 nexttowardl.3
|
||||
|
@ -190,4 +190,7 @@ FBSD_1.1 {
|
||||
cargf;
|
||||
csqrt;
|
||||
csqrtf;
|
||||
nan;
|
||||
nanf;
|
||||
nanl;
|
||||
};
|
||||
|
47
lib/msun/ld128/s_nanl.c
Normal file
47
lib/msun/ld128/s_nanl.c
Normal file
@ -0,0 +1,47 @@
|
||||
/*-
|
||||
* Copyright (c) 2007 David Schultz
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* $FreeBSD$
|
||||
*/
|
||||
|
||||
#include <math.h>
|
||||
|
||||
#include "fpmath.h"
|
||||
#include "../../../contrib/gdtoa/gdtoaimp.h"
|
||||
|
||||
long double
|
||||
nanl(const char *s)
|
||||
{
|
||||
static FPI fpi = { 113, -16494, 16271, 1, SI };
|
||||
|
||||
union IEEEl2bits result;
|
||||
ULong bits[2];
|
||||
int k;
|
||||
|
||||
s--;
|
||||
k = hexnan(&s, &fpi, bits);
|
||||
ULtoQ((UShort *)&result.e, bits, 16272, k);
|
||||
return (result.e);
|
||||
}
|
47
lib/msun/ld80/s_nanl.c
Normal file
47
lib/msun/ld80/s_nanl.c
Normal file
@ -0,0 +1,47 @@
|
||||
/*-
|
||||
* Copyright (c) 2007 David Schultz
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* $FreeBSD$
|
||||
*/
|
||||
|
||||
#include <math.h>
|
||||
|
||||
#include "fpmath.h"
|
||||
#include "../../../contrib/gdtoa/gdtoaimp.h"
|
||||
|
||||
long double
|
||||
nanl(const char *s)
|
||||
{
|
||||
static FPI fpi = { 64, -16445, 16320, 1, SI };
|
||||
|
||||
union IEEEl2bits result;
|
||||
ULong bits[2];
|
||||
int k;
|
||||
|
||||
s--;
|
||||
k = hexnan(&s, &fpi, bits);
|
||||
ULtox((UShort *)&result.e, bits, 16321, k);
|
||||
return (result.e);
|
||||
}
|
99
lib/msun/man/nan.3
Normal file
99
lib/msun/man/nan.3
Normal file
@ -0,0 +1,99 @@
|
||||
.\" Copyright (c) 2007 David Schultz <das@FreeBSD.org>
|
||||
.\" All rights reserved.
|
||||
.\"
|
||||
.\" Redistribution and use in source and binary forms, with or without
|
||||
.\" modification, are permitted provided that the following conditions
|
||||
.\" are met:
|
||||
.\" 1. Redistributions of source code must retain the above copyright
|
||||
.\" notice, this list of conditions and the following disclaimer.
|
||||
.\" 2. Redistributions in binary form must reproduce the above copyright
|
||||
.\" notice, this list of conditions and the following disclaimer in the
|
||||
.\" documentation and/or other materials provided with the distribution.
|
||||
.\"
|
||||
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
.\" SUCH DAMAGE.
|
||||
.\"
|
||||
.\" $FreeBSD$
|
||||
.\"
|
||||
.Dd December 16, 2007
|
||||
.Dt NAN 3
|
||||
.Os
|
||||
.Sh NAME
|
||||
.Nm nan ,
|
||||
.Nm nanf ,
|
||||
.Nm nanl
|
||||
.Nd quiet \*(Nas
|
||||
.Sh LIBRARY
|
||||
.Lb libm
|
||||
.Sh SYNOPSIS
|
||||
.In math.h
|
||||
.Ft double
|
||||
.Fn nan "const char *s"
|
||||
.Ft float
|
||||
.Fn nanf "const char *s"
|
||||
.Ft long double
|
||||
.Fn nanl "const char *s"
|
||||
.Sh DESCRIPTION
|
||||
The
|
||||
.Dv NAN
|
||||
macro expands to a quiet \*(Na (Not A Number).
|
||||
Similarly, each of the
|
||||
.Fn nan ,
|
||||
.Fn nanf ,
|
||||
and
|
||||
.Fn nanl
|
||||
functions generate a quiet \*(Na value without raising an invalid exception.
|
||||
The argument
|
||||
.Fa s
|
||||
should point to either an empty string or a hexadecimal representation
|
||||
of a non-negative integer (e.g., "0x1234".)
|
||||
In the latter case, the integer is encoded in some free bits in the
|
||||
representation of the \*(Na, which sometimes store
|
||||
machine-specific information about why a particular \*(Na was generated.
|
||||
There are 22 such bits available for
|
||||
.Vt float
|
||||
variables, 51 bits for
|
||||
.Vt double
|
||||
variables, and at least 51 bits for a
|
||||
.Vt long double .
|
||||
If
|
||||
.Fa s
|
||||
is improperly formatted or represents an integer that is too large,
|
||||
then the particular encoding of the quiet \*(Na that is returned
|
||||
is indeterminate.
|
||||
.Sh COMPATIBILITY
|
||||
Calling these functions with a non-empty string isn't portable.
|
||||
Another operating system may translate the string into a different
|
||||
\*(Na encoding, and furthermore, the meaning of a given \*(Na encoding
|
||||
varies across machine architectures.
|
||||
If you understood the innards of a particular platform well enough to
|
||||
know what string to use, then you would have no need for these functions
|
||||
anyway, so don't use them.
|
||||
Use the
|
||||
.Dv NAN
|
||||
macro instead.
|
||||
.Sh SEE ALSO
|
||||
.Xr fenv 3 ,
|
||||
.Xr ieee 3 ,
|
||||
.Xr isnan 3 ,
|
||||
.Xr math 3 ,
|
||||
.Xr strtod 3
|
||||
.Sh STANDARDS
|
||||
The
|
||||
.Fn nan ,
|
||||
.Fn nanf ,
|
||||
and
|
||||
.Fn nanl
|
||||
functions and the
|
||||
.Dv NAN
|
||||
macro conform to
|
||||
.St -isoC-99 .
|
@ -238,6 +238,7 @@ double log1p(double);
|
||||
double logb(double);
|
||||
long lrint(double);
|
||||
long lround(double);
|
||||
double nan(const char *) __pure2;
|
||||
double nextafter(double, double);
|
||||
double remainder(double, double);
|
||||
double remquo(double, double, int *);
|
||||
@ -341,6 +342,7 @@ long long llrintf(float);
|
||||
long long llroundf(float);
|
||||
long lrintf(float);
|
||||
long lroundf(float);
|
||||
float nanf(const char *) __pure2;
|
||||
float nearbyintf(float);
|
||||
float nextafterf(float, float);
|
||||
float remainderf(float, float);
|
||||
@ -435,13 +437,15 @@ long double log10l(long double);
|
||||
long double log1pl(long double);
|
||||
long double log2l(long double);
|
||||
long double logbl(long double);
|
||||
#endif
|
||||
long double logl(long double);
|
||||
#if 0
|
||||
long lrintl(long double);
|
||||
#endif
|
||||
long lroundl(long double);
|
||||
long double modfl(long double, long double *); /* fundamentally !__pure2 */
|
||||
#if 0
|
||||
long double nanl(const char *) __pure2;
|
||||
#if 0
|
||||
long double nearbyintl(long double);
|
||||
#endif
|
||||
long double nextafterl(long double, long double);
|
||||
|
66
lib/msun/src/s_nan.c
Normal file
66
lib/msun/src/s_nan.c
Normal file
@ -0,0 +1,66 @@
|
||||
/*-
|
||||
* Copyright (c) 2007 David Schultz
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* $FreeBSD$
|
||||
*/
|
||||
|
||||
#include <float.h>
|
||||
#include <math.h>
|
||||
|
||||
#include "../../../contrib/gdtoa/gdtoaimp.h"
|
||||
#include "math_private.h"
|
||||
|
||||
double
|
||||
nan(const char *s)
|
||||
{
|
||||
static FPI fpi = { 52, -1074, 971, 1, SI };
|
||||
|
||||
double result;
|
||||
ULong bits[2];
|
||||
|
||||
s--;
|
||||
hexnan(&s, &fpi, bits);
|
||||
SET_HIGH_WORD(result, 0x7ff80000 | bits[1]);
|
||||
SET_LOW_WORD(result, bits[0]);
|
||||
return (result);
|
||||
}
|
||||
|
||||
float
|
||||
nanf(const char *s)
|
||||
{
|
||||
static FPI fpi = { 24, -149, 104, 1, SI };
|
||||
|
||||
float result;
|
||||
ULong bits[1];
|
||||
|
||||
s--;
|
||||
hexnan(&s, &fpi, bits);
|
||||
SET_FLOAT_WORD(result, 0x7fc00000 | bits[0]);
|
||||
return (result);
|
||||
}
|
||||
|
||||
#if (LDBL_MANT_DIG == 53)
|
||||
__weak_reference(nan, nanl);
|
||||
#endif
|
Loading…
Reference in New Issue
Block a user