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Replace seven nominally MD implementations of frexp() that are broken

Browse Source 
for subnormals with one implementation that works.
This commit is contained in:
David Schultz 2004-07-18 21:23:39 +00:00
parent aec86de47b
commit 39bcea8689
16 changed files with 65 additions and 456 deletions
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2
lib/libc/alpha/gen/Makefile.inc
View File

@ -1,6 +1,6 @@
# $FreeBSD$
SRCS+= _setjmp.S fabs.S frexp.c infinity.c ldexp.c modf.c setjmp.S
SRCS+= _setjmp.S fabs.S infinity.c ldexp.c modf.c setjmp.S
SRCS+= flt_rounds.c fpgetmask.c fpgetround.c fpgetsticky.c fpsetmask.c \
fpsetround.c fpsetsticky.c

56
lib/libc/alpha/gen/frexp.c
View File

@ -1,56 +0,0 @@
/*
* Copyright (c) 1994, 1995 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*
* $NetBSD: frexp.c,v 1.1 1995/02/10 17:50:22 cgd Exp $
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <machine/ieee.h>
#include <math.h>
double
frexp(value, eptr)
double value;
int *eptr;
{
union doub {
double v;
struct ieee_double s;
} u;
if (value) {
u.v = value;
*eptr = u.s.dbl_exp - (DBL_EXP_BIAS - 1);
u.s.dbl_exp = DBL_EXP_BIAS - 1;
return(u.v);
} else {
*eptr = 0;
return((double)0);
}
}

3
lib/libc/amd64/gen/Makefile.inc
View File

@ -3,7 +3,6 @@
SRCS+= _setjmp.S rfork_thread.S setjmp.S sigsetjmp.S \
fabs.S modf.S \
frexp.c infinity.c ldexp.c \
makecontext.c signalcontext.c \
infinity.c ldexp.c makecontext.c signalcontext.c \
fpgetmask.c fpsetmask.c fpgetprec.c fpsetprec.c \
fpgetround.c fpsetround.c fpgetsticky.c fpsetsticky.c

67
lib/libc/amd64/gen/frexp.c
View File

@ -1,67 +0,0 @@
/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)frexp.c 8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <math.h>
double
frexp(value, eptr)
double value;
int *eptr;
{
union {
double v;
struct {
u_int u_mant2 : 32;
u_int u_mant1 : 20;
u_int u_exp : 11;
u_int u_sign : 1;
} s;
} u;
if (value) {
u.v = value;
*eptr = u.s.u_exp - 1022;
u.s.u_exp = 1022;
return(u.v);
} else {
*eptr = 0;
return((double)0);
}
}

2
lib/libc/arm/gen/Makefile.inc
View File

@ -1,6 +1,6 @@
# @(#)Makefile.inc 8.1 (Berkeley) 6/4/93
# $FreeBSD$
SRCS+= _ctx_start.S _setjmp.S alloca.S fabs.c frexp.c \
SRCS+= _ctx_start.S _setjmp.S alloca.S fabs.c \
infinity.c ldexp.c makecontext.c modf.c \
setjmp.S signalcontext.c sigsetjmp.S divsi3.S

67
lib/libc/arm/gen/frexp.c
View File

@ -1,67 +0,0 @@
/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)frexp.c 8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <math.h>
double
frexp(value, eptr)
double value;
int *eptr;
{
union {
double v;
struct {
u_int u_mant2 : 32;
u_int u_mant1 : 20;
u_int u_exp : 11;
u_int u_sign : 1;
} s;
} u;
if (value) {
u.v = value;
*eptr = u.s.u_exp - 1022;
u.s.u_exp = 1022;
return(u.v);
} else {
*eptr = 0;
return((double)0);
}
}

2
lib/libc/gen/Makefile.inc
View File

@ -10,7 +10,7 @@ SRCS+= __xuname.c _pthread_stubs.c _rand48.c _spinlock_stub.c _thread_init.c \
crypt.c ctermid.c daemon.c devname.c dirname.c disklabel.c \
dlfcn.c dlfunc.c drand48.c erand48.c err.c errlst.c errno.c \
exec.c fmtcheck.c fmtmsg.c fnmatch.c \
fpclassify.c fstab.c ftok.c fts.c ftw.c \
fpclassify.c frexp.c fstab.c ftok.c fts.c ftw.c \
getbootfile.c getbsize.c \
getcap.c getcwd.c getdomainname.c getgrent.c getgrouplist.c \
gethostname.c getloadavg.c getlogin.c getmntinfo.c getnetgrent.c \

57
lib/libc/gen/frexp.c Normal file
View File

@ -0,0 +1,57 @@
/*-
* 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.
*
* $FreeBSD$
*/
#include <math.h>
#include "fpmath.h"
double
frexp(double d, int *ex)
{
union IEEEd2bits u;
u.d = d;
switch (u.bits.exp) {
case 0: /* 0 or subnormal */
if ((u.bits.manl | u.bits.manh) == 0) {
*ex = 0;
} else {
u.d *= 0x1.0p514;
*ex = u.bits.exp - 1536;
u.bits.exp = 1022;
}
break;
case 2047: /* infinity or NaN; value of *ex is unspecified */
break;
default: /* normal */
*ex = u.bits.exp - 1022;
u.bits.exp = 1022;
break;
}
return (u.d);
}

2
lib/libc/i386/gen/Makefile.inc
View File

@ -1,6 +1,6 @@
# @(#)Makefile.inc 8.1 (Berkeley) 6/4/93
# $FreeBSD$
SRCS+= _ctx_start.S _setjmp.S alloca.S fabs.S frexp.c \
SRCS+= _ctx_start.S _setjmp.S alloca.S fabs.S \
infinity.c ldexp.c makecontext.c modf.S \
rfork_thread.S setjmp.S signalcontext.c sigsetjmp.S

67
lib/libc/i386/gen/frexp.c
View File

@ -1,67 +0,0 @@
/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)frexp.c 8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <math.h>
double
frexp(value, eptr)
double value;
int *eptr;
{
union {
double v;
struct {
u_int u_mant2 : 32;
u_int u_mant1 : 20;
u_int u_exp : 11;
u_int u_sign : 1;
} s;
} u;
if (value) {
u.v = value;
*eptr = u.s.u_exp - 1022;
u.s.u_exp = 1022;
return(u.v);
} else {
*eptr = 0;
return((double)0);
}
}

2
lib/libc/ia64/gen/Makefile.inc
View File

@ -2,7 +2,7 @@
SRCS+= __divdf3.S __divdi3.S __divsf3.S __divsi3.S __moddi3.S __modsi3.S \
__udivdi3.S __udivsi3.S __umoddi3.S __umodsi3.S _setjmp.S fabs.S \
fpgetmask.c fpgetround.c fpsetmask.c fpsetround.c frexp.c infinity.c \
fpgetmask.c fpgetround.c fpsetmask.c fpsetround.c infinity.c \
ldexp.c makecontext.c modf.c setjmp.S signalcontext.c sigsetjmp.S
# The following may go away if function _Unwind_FindTableEntry()

56
lib/libc/ia64/gen/frexp.c
View File

@ -1,56 +0,0 @@
/* $NetBSD: frexp.c,v 1.1 1995/02/10 17:50:22 cgd Exp $ */
/*
* Copyright (c) 1994, 1995 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <machine/ieee.h>
#include <math.h>
double
frexp(value, eptr)
double value;
int *eptr;
{
union doub {
double v;
struct ieee_double s;
} u;
if (value) {
u.v = value;
*eptr = u.s.dbl_exp - (DBL_EXP_BIAS - 1);
u.s.dbl_exp = DBL_EXP_BIAS - 1;
return(u.v);
} else {
*eptr = 0;
return((double)0);
}
}

2
lib/libc/powerpc/gen/Makefile.inc
View File

@ -1,7 +1,7 @@
# $FreeBSD$
SRCS += _ctx_start.S fabs.S flt_rounds.c fpgetmask.c fpgetround.c \
fpgetsticky.c fpsetmask.c fpsetround.c fpsetsticky.c frexp.c \
fpgetsticky.c fpsetmask.c fpsetround.c fpsetsticky.c \
infinity.c ldexp.c makecontext.c modf.c _setjmp.S \
setjmp.S sigsetjmp.S syncicache.c

56
lib/libc/powerpc/gen/frexp.c
View File

@ -1,56 +0,0 @@
/*
* Copyright (c) 1994, 1995 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*
* $NetBSD: frexp.c,v 1.1 1995/02/10 17:50:22 cgd Exp $
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <machine/ieee.h>
#include <math.h>
double
frexp(value, eptr)
double value;
int *eptr;
{
union doub {
double v;
struct ieee_double s;
} u;
if (value) {
u.v = value;
*eptr = u.s.dbl_exp - (DBL_EXP_BIAS - 1);
u.s.dbl_exp = DBL_EXP_BIAS - 1;
return(u.v);
} else {
*eptr = 0;
return((double)0);
}
}

2
lib/libc/sparc64/gen/Makefile.inc
View File

@ -2,5 +2,5 @@
SRCS+= _ctx_start.S _setjmp.S fabs.S fixunsdfsi.S flt_rounds.c fpgetmask.c \
fpgetround.c fpgetsticky.c fpsetmask.c fpsetround.c fpsetsticky.c \
frexp.c infinity.c ldexp.c makecontext.c modf.S \
infinity.c ldexp.c makecontext.c modf.S \
signalcontext.c setjmp.S sigsetjmp.S

78
lib/libc/sparc64/gen/frexp.c
View File

@ -1,78 +0,0 @@
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char rcsid[] = "$OpenBSD: frexp.c,v 1.2 2001/09/10 22:37:06 millert Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <machine/ieee.h>
/*
* Split the given value into a fraction in the range [0.5, 1.0) and
* an exponent, such that frac * (2^exp) == value. If value is 0,
* return 0.
*/
double
frexp(value, eptr)
double value;
int *eptr;
{
union {
double v;
struct ieee_double s;
} u;
if (value) {
/*
* Fractions in [0.5..1.0) have an exponent of 2^-1.
* Leave Inf and NaN alone, however.
* WHAT ABOUT DENORMS?
*/
u.v = value;
if (u.s.dbl_exp != DBL_EXP_INFNAN) {
*eptr = u.s.dbl_exp - (DBL_EXP_BIAS - 1);
u.s.dbl_exp = DBL_EXP_BIAS - 1;
}
return (u.v);
} else {
*eptr = 0;
return ((double)0);
}
}