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Implement and document fdim{,f,l}, fmax{,f,l}, and fmin{,f,l}.

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This commit is contained in:
David Schultz 2004-06-30 07:04:01 +00:00
parent 6840424ee5
commit 4f82cb46c4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=131320
11 changed files with 570 additions and 7 deletions
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12
lib/msun/Makefile
View File

@ -81,8 +81,9 @@ COMMON_SRCS= b_exp.c b_log.c b_tgamma.c \
k_standard.c k_tan.c k_tanf.c \
s_asinh.c s_asinhf.c s_atan.c s_atanf.c s_cbrt.c s_cbrtf.c s_ceil.c \
s_ceilf.c s_copysign.c s_copysignf.c s_cos.c s_cosf.c s_erf.c s_erff.c \
s_expm1.c s_expm1f.c s_fabsf.c s_finite.c s_finitef.c \
s_floor.c s_floorf.c s_frexp.c s_frexpf.c s_ilogb.c s_ilogbf.c \
s_expm1.c s_expm1f.c s_fabsf.c s_fdim.c s_finite.c s_finitef.c \
s_floor.c s_floorf.c s_fmax.c s_fmaxf.c s_fmaxl.c s_fmin.c \
s_fminf.c s_fminl.c s_frexp.c s_frexpf.c s_ilogb.c s_ilogbf.c \
s_isnanf.c s_ldexpf.c s_lib_version.c s_log1p.c \
s_log1pf.c s_logb.c s_logbf.c s_matherr.c s_modff.c \
s_nextafter.c s_nextafterf.c s_rint.c s_rintf.c s_round.c s_roundf.c \
@ -126,8 +127,8 @@ SRCS= ${COMMON_SRCS} ${ARCH_SRCS}
INCS= fenv.h math.h
MAN= acos.3 acosh.3 asin.3 asinh.3 atan.3 atan2.3 atanh.3 ceil.3 \
cos.3 cosh.3 erf.3 exp.3 fabs.3 feclearexcept.3 fegetenv.3 \
fegetround.3 fenv.3 floor.3 fmod.3 hypot.3 ieee.3 \
cos.3 cosh.3 erf.3 exp.3 fabs.3 fdim.3 feclearexcept.3 fegetenv.3 \
fegetround.3 fenv.3 floor.3 fmax.3 fmod.3 hypot.3 ieee.3 \
ieee_test.3 j0.3 lgamma.3 math.3 rint.3 round.3 sin.3 sinh.3 sqrt.3 \
tan.3 tanh.3 trunc.3
@ -147,12 +148,15 @@ MLINKS+=exp.3 expm1.3 exp.3 log.3 exp.3 log10.3 exp.3 log1p.3 exp.3 pow.3 \
exp.3 expm1f.3 exp.3 logf.3 exp.3 powf.3 \
exp.3 log10f.3 exp.3 log1pf.3
MLINKS+=fabs.3 fabsf.3 fabs.3 fabsl.3
MLINKS+=fdim.3 fdimf.3 fdim.3 fdiml.3
MLINKS+=feclearexcept.3 fegetexceptflag.3 feclearexcept.3 feraiseexcept.3 \
feclearexcept.3 fesetexceptflag.3 feclearexcept.3 fetestexcept.3
MLINKS+=fegetenv.3 feholdexcept.3 fegetenv.3 fesetenv.3 \
fegetenv.3 feupdateenv.3
MLINKS+=fegetround.3 fesetround.3
MLINKS+=floor.3 floorf.3
MLINKS+=fmax.3 fmaxf.3 fmax.3 fmaxl.3 \
fmax.3 fmin.3 fmax.3 fminf.3 fmax.3 fminl.3
MLINKS+=fmod.3 fmodf.3
MLINKS+=hypot.3 cabs.3 hypot.3 cabsf.3 hypot.3 hypotf.3
MLINKS+=ieee.3 copysign.3 ieee.3 copysignf.3 ieee.3 copysignl.3 \

86
lib/msun/man/fdim.3 Normal file
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@ -0,0 +1,86 @@
.\" Copyright (c) 2004 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 June 29, 2004
.Dt FDIM 3
.Os
.Sh NAME
.Nm fdim ,
.Nm fdimf ,
.Nm fdiml
.Nd positive difference functions
.Sh LIBRARY
.Lb libm
.Sh SYNOPSIS
.In math.h
.Ft double
.Fn fdim "double x" "double y"
.Ft float
.Fn fdimf "float x" "float y"
.Ft long double
.Fn fdiml "long double x" "long double y"
.Sh DESCRIPTION
The
.Fn fdim ,
.Fn fdimf ,
and
.Fn fdiml
functions return the positive difference between
.Fa x
and
.Fa y .
That is, if
.Fa x\- Ns Fa y
is positive, then
.Fa x\- Ns Fa y
is returned.
If either
.Fa x
or
.Fa y
is an \*(Na, then an \*(Na is returned.
Otherwise, the result is
.Li +0.0 .
.Pp
Overflow or underflow may occur iff the exact result is not
representable in the return type.
No other exceptions are raised.
.Sh SEE ALSO
.Xr fabs 3 ,
.Xr fmax 3 ,
.Xr fmin 3 ,
.Xr math 3
.Sh STANDARDS
The
.Fn fdim ,
.Fn fdimf ,
and
.Fn fdiml
functions conform to
.St -isoC-99 .
.Sh HISTORY
These routines first appeared in
.Fx 5.3 .

96
lib/msun/man/fmax.3 Normal file
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@ -0,0 +1,96 @@
.\" Copyright (c) 2004 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 June 29, 2004
.Dt FMAX 3
.Os
.Sh NAME
.Nm fmax ,
.Nm fmaxf ,
.Nm fmaxl ,
.Nm fmin ,
.Nm fminf ,
.Nm fminl
.Nd floating-point maximum and minimum functions
.Sh LIBRARY
.Lb libm
.Sh SYNOPSIS
.In math.h
.Ft double
.Fn fmax "double x" "double y"
.Ft float
.Fn fmaxf "float x" "float y"
.Ft long double
.Fn fmaxl "long double x" "long double y"
.Ft double
.Fn fmin "double x" "double y"
.Ft float
.Fn fminf "float x" "float y"
.Ft long double
.Fn fminl "long double x" "long double y"
.Sh DESCRIPTION
The
.Fn fmax ,
.Fn fmaxf ,
and
.Fn fmaxl
functions return the larger of
.Fa x
and
.Fa y ,
and likewise, the
.Fn fmin ,
.Fn fminf ,
and
.Fn fminl
functions return the smaller of
.Fa x
and
.Fa y .
.Li +0.0
is treated as being larger than
.Li -0.0 .
If one argument is an \*(Na, then the other argument is returned.
If both arguments are \*(Nas, then the result is an \*(Na.
These routines do not raise any floating-point exceptions.
.Sh SEE ALSO
.Xr fabs 3 ,
.Xr fdim 3 ,
.Xr math 3
.Sh STANDARDS
The
.Fn fmax ,
.Fn fmaxf ,
.Fn fmaxl ,
.Fn fmin ,
.Fn fminf ,
and
.Fn fminl
functions conform to
.St -isoC-99 .
.Sh HISTORY
These routines first appeared in
.Fx 5.3 .

15
lib/msun/src/math.h
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@ -207,6 +207,9 @@ double cbrt(double) __pure2;
double erf(double);
double erfc(double) __pure2;
double expm1(double) __pure2;
double fdim(double, double);
double fmax(double, double) __pure2;
double fmin(double, double) __pure2;
double hypot(double, double);
int ilogb(double);
double lgamma(double);
@ -314,6 +317,10 @@ float rintf(float);
float scalblnf(float, long);
float scalbnf(float, int);
float truncf(float);
float fdimf(float, float);
float fmaxf(float, float) __pure2;
float fminf(float, float) __pure2;
#endif
/*
@ -371,12 +378,14 @@ long double expl(long double);
long double expm1l(long double);
#endif
long double fabsl(long double);
#if 0
long double fdiml(long double, long double);
#if 0
long double floorl(long double);
long double fmal(long double, long double, long double);
long double fmaxl(long double, long double);
long double fminl(long double, long double);
#endif
long double fmaxl(long double, long double) __pure2;
long double fminl(long double, long double) __pure2;
#if 0
long double fmodl(long double, long double);
long double frexpl(long double value, int *);
long double hypotl(long double, long double);

46
lib/msun/src/s_fdim.c Normal file
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@ -0,0 +1,46 @@
/*-
* Copyright (c) 2004 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <math.h>
#define DECL(type, fn) \
type \
fn(type x, type y) \
{ \
\
if (isnan(x)) \
return (x); \
if (isnan(y)) \
return (y); \
return (x > y ? x - y : 0.0); \
}
DECL(double, fdim)
DECL(float, fdimf)
DECL(long double, fdiml)

53
lib/msun/src/s_fmax.c Normal file
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@ -0,0 +1,53 @@
/*-
* Copyright (c) 2004 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <math.h>
#include "fpmath.h"
double
fmax(double x, double y)
{
union IEEEd2bits u[2];
u[0].d = x;
u[1].d = y;
/* Check for NaNs to avoid raising spurious exceptions. */
if (u[0].bits.exp == 2047 && (u[0].bits.manh | u[0].bits.manl) != 0)
return (y);
if (u[1].bits.exp == 2047 && (u[1].bits.manh | u[1].bits.manl) != 0)
return (x);
/* Handle comparisons of signed zeroes. */
if (u[0].bits.sign != u[1].bits.sign)
return (u[u[0].bits.sign].d);
return (x > y ? x : y);
}

53
lib/msun/src/s_fmaxf.c Normal file
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@ -0,0 +1,53 @@
/*-
* Copyright (c) 2004 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <math.h>
#include "fpmath.h"
float
fmaxf(float x, float y)
{
union IEEEf2bits u[2];
u[0].f = x;
u[1].f = y;
/* Check for NaNs to avoid raising spurious exceptions. */
if (u[0].bits.exp == 255 && u[0].bits.man != 0)
return (y);
if (u[1].bits.exp == 255 && u[1].bits.man != 0)
return (x);
/* Handle comparisons of signed zeroes. */
if (u[0].bits.sign != u[1].bits.sign)
return (u[u[0].bits.sign].f);
return (x > y ? x : y);
}

55
lib/msun/src/s_fmaxl.c Normal file
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@ -0,0 +1,55 @@
/*-
* Copyright (c) 2004 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <math.h>
#include "fpmath.h"
long double
fmaxl(long double x, long double y)
{
union IEEEl2bits u[2];
u[0].e = x;
mask_nbit_l(u[0]);
u[1].e = y;
mask_nbit_l(u[1]);
/* Check for NaNs to avoid raising spurious exceptions. */
if (u[0].bits.exp == 32767 && (u[0].bits.manh | u[0].bits.manl) != 0)
return (y);
if (u[1].bits.exp == 32767 && (u[1].bits.manh | u[1].bits.manl) != 0)
return (x);
/* Handle comparisons of signed zeroes. */
if (u[0].bits.sign != u[1].bits.sign)
return (u[0].bits.sign ? y : x);
return (x > y ? x : y);
}

53
lib/msun/src/s_fmin.c Normal file
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@ -0,0 +1,53 @@
/*-
* Copyright (c) 2004 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <math.h>
#include "fpmath.h"
double
fmin(double x, double y)
{
union IEEEd2bits u[2];
u[0].d = x;
u[1].d = y;
/* Check for NaNs to avoid raising spurious exceptions. */
if (u[0].bits.exp == 2047 && (u[0].bits.manh | u[0].bits.manl) != 0)
return (y);
if (u[1].bits.exp == 2047 && (u[1].bits.manh | u[1].bits.manl) != 0)
return (x);
/* Handle comparisons of signed zeroes. */
if (u[0].bits.sign != u[1].bits.sign)
return (u[u[1].bits.sign].d);
return (x < y ? x : y);
}

53
lib/msun/src/s_fminf.c Normal file
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@ -0,0 +1,53 @@
/*-
* Copyright (c) 2004 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <math.h>
#include "fpmath.h"
float
fminf(float x, float y)
{
union IEEEf2bits u[2];
u[0].f = x;
u[1].f = y;
/* Check for NaNs to avoid raising spurious exceptions. */
if (u[0].bits.exp == 255 && u[0].bits.man != 0)
return (y);
if (u[1].bits.exp == 255 && u[1].bits.man != 0)
return (x);
/* Handle comparisons of signed zeroes. */
if (u[0].bits.sign != u[1].bits.sign)
return (u[u[1].bits.sign].f);
return (x < y ? x : y);
}

55
lib/msun/src/s_fminl.c Normal file
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@ -0,0 +1,55 @@
/*-
* Copyright (c) 2004 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <math.h>
#include "fpmath.h"
long double
fminl(long double x, long double y)
{
union IEEEl2bits u[2];
u[0].e = x;
mask_nbit_l(u[0]);
u[1].e = y;
mask_nbit_l(u[1]);
/* Check for NaNs to avoid raising spurious exceptions. */
if (u[0].bits.exp == 32767 && (u[0].bits.manh | u[0].bits.manl) != 0)
return (y);
if (u[1].bits.exp == 32767 && (u[1].bits.manh | u[1].bits.manl) != 0)
return (x);
/* Handle comparisons of signed zeroes. */
if (u[0].bits.sign != u[1].bits.sign)
return (u[1].bits.sign ? y : x);
return (x < y ? x : y);
}