diff options
| -rw-r--r-- | ChangeLog | 15 | ||||
| -rw-r--r-- | FAQ | 47 | ||||
| -rw-r--r-- | math/Makefile | 5 | ||||
| -rw-r--r-- | sysdeps/libm-i387/s_isnanl.c | 9 | ||||
| -rw-r--r-- | sysdeps/libm-ieee754/s_frexpl.c | 69 | ||||
| -rw-r--r-- | sysdeps/libm-ieee754/s_ldexpl.c | 37 |
6 files changed, 172 insertions, 10 deletions
@@ -1,5 +1,10 @@ Thu Jul 11 20:09:55 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu> + * math/Makefile (calls): Add s_frexp, s_ldexp. + (routines): Remove them and &f from here. + + * sys/socket.h: New file, wrapper for socket/sys/socket.h. + * nss/nss_files/files-service.c (getservbyname): Take second arg PROTO and check it. @@ -33,6 +38,16 @@ Thu Jul 11 03:21:10 1996 Ulrich Drepper <drepper@cygnus.com> * catgets/gencat.c (write_out): Move code to determine new best size out of inner loop. +Thu Jul 11 00:22:40 1996 Ulrich Drepper <drepper@cygnus.com> + + * sysdeps/libm-ieee754/s_frexpl.c: New file. `long double' + implementation of frexp() function. + * sysdeps/libm-ieee754/s_ldexpl.c: New file. `long double' + implementation of ldexp() function. + + * sysdeps/libm-i387/s_isnanl.c (isnanl): Mask explicit one + out before or'ing. + Wed Jul 10 05:24:40 1996 David Mosberger-Tang <davidm@azstarnet.com> * misc/mntent.c: Include <sys/types.h>. @@ -43,6 +43,9 @@ please let me know. [Q11] ``Where are the DST_* constants found in <sys/time.h> on many systems?'' + +[Q12] ``The `gencat' utility cannot process the input which are + successfully used on my Linux libc based system. Why?'' ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ [Q1] ``What systems does the GNU C Library run on?'' @@ -133,12 +136,12 @@ Library. form the tools from the GNU gettext package are necessary. See ftp://prep.ai.mit.edu/pub/gnu or better any mirror site. -* lots of diskspace (for i386-linux this means, e.g., ~70MB). +* lots of diskspace (for i?86-linux this means, e.g., ~70MB). You should avoid compiling on a NFS mounted device. This is very slow. -* plenty of time (approx 1h for i386-linux on i586@133 or 2.5h on +* plenty of time (approx 1h for i?86-linux on i586@133 or 2.5h on i486@66 or 4.5h on i486@33). If you have some more measurements let me know. @@ -191,7 +194,7 @@ For Linux there are today two libc versions: libc-5 current ELF libc GNU libc will have the major number 6 and therefore you can have this -additionally installed. For more information consult documenation for +additionally installed. For more information consult documentation for shared library handling. The Makefiles of GNU libc will automatically generate the needed symbolic links which the linker will use. @@ -297,6 +300,44 @@ code for POSIX TZ environment variable handling. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ + +[Q12] ``The `gencat' utility cannot process the input which are + successfully used on my Linux libc based system. Why?'' + +[A12] {UD} Unlike the author of the `gencat' program which is distributed +with Linux libc I have read the underlying standards before writing the +code. It is completely compatible with the specification given in +X/Open Portability Guide. + +To ease the transition from the Linux version some of the non-standard +features are also present in the `gencat' program of GNU libc. This +mainly includes the use of symbols for the message number and the automatic +generation of header files which contain the needed #defines to map the +symbols to integers. + +Here is a simple SED script to convert at least some Linux specific +catalog files to the XPG4 form: + +----------------------------------------------------------------------- +# Change catalog source in Linux specific format to standard XPG format. +# Ulrich Drepper <drepper@cygnus.com>, 1996. +# +/^\$ #/ { + h + s/\$ #\([^ ]*\).*/\1/ + x + s/\$ #[^ ]* *\(.*\)/\$ \1/ +} + +/^# / { + s/^# \(.*\)/\1/ + G + s/\(.*\)\n\(.*\)/\2 \1/ +} +----------------------------------------------------------------------- + + +~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Answers were given by: {UD} Ulrich Drepper, <drepper@cygnus.com> diff --git a/math/Makefile b/math/Makefile index bce9890ff3..e0a9c6e86e 100644 --- a/math/Makefile +++ b/math/Makefile @@ -55,9 +55,8 @@ long-m-routines = $(patsubst %_rl,%l_r,$(libm-calls:=l)) # not ready yet # These functions are in libc instead of libm because __printf_fp # calls them, so any program using printf will need them linked in, # and we don't want to have to link every program with -lm. -calls = s_isinf s_isnan s_finite s_copysign s_modf s_scalbn -routines = $(calls) $(calls:=f) $(long-c-$(long-double-fcts)) \ - s_frexp s_ldexp s_frexpf s_ldexpf +calls = s_isinf s_isnan s_finite s_copysign s_modf s_scalbn s_frexp s_ldexp +routines = $(calls) $(calls:=f) $(long-c-$(long-double-fcts)) long-c-yes = $(calls:=l) distribute += $(long-c-yes:=.c) diff --git a/sysdeps/libm-i387/s_isnanl.c b/sysdeps/libm-i387/s_isnanl.c index 768ea2164b..6a74b956cc 100644 --- a/sysdeps/libm-i387/s_isnanl.c +++ b/sysdeps/libm-i387/s_isnanl.c @@ -36,10 +36,11 @@ static char rcsid[] = "$NetBSD: $"; int32_t se,hx,lx; GET_LDOUBLE_WORDS(se,hx,lx,x); se = (se & 0x7fff) << 1; - lx |= hx; - /* The additional &hx is required because Intel's extended format - has the normally implicit 1 explicit present. Sigh! */ - se |= (u_int32_t)((lx|(-lx))&hx)>>31; + /* The additional & 0x7fffffff is required because Intel's + extended format has the normally implicit 1 explicit + present. Sigh! */ + lx |= hx & 0x7fffffff; + se |= (u_int32_t)(lx|(-lx))>>31; se = 0xfffe - se; return (int)((u_int32_t)(se))>>16; } diff --git a/sysdeps/libm-ieee754/s_frexpl.c b/sysdeps/libm-ieee754/s_frexpl.c new file mode 100644 index 0000000000..7a49bc37c8 --- /dev/null +++ b/sysdeps/libm-ieee754/s_frexpl.c @@ -0,0 +1,69 @@ +/* s_frexpl.c -- long double version of s_frexp.c. + * Conversion to long double by Ulrich Drepper, + * Cygnus Support, drepper@cygnus.com. + */ + +/* + * ==================================================== + * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. + * + * Developed at SunPro, a Sun Microsystems, Inc. business. + * Permission to use, copy, modify, and distribute this + * software is freely granted, provided that this notice + * is preserved. + * ==================================================== + */ + +#if defined(LIBM_SCCS) && !defined(lint) +static char rcsid[] = "$NetBSD: $"; +#endif + +/* + * for non-zero x + * x = frexpl(arg,&exp); + * return a long double fp quantity x such that 0.5 <= |x| <1.0 + * and the corresponding binary exponent "exp". That is + * arg = x*2^exp. + * If arg is inf, 0.0, or NaN, then frexpl(arg,&exp) returns arg + * with *exp=0. + */ + +#include "math.h" +#include "math_private.h" + +#ifdef __STDC__ +static const long double +#else +static long double +#endif +#if LDBL_MANT_DIG == 64 +two65 = 3.68934881474191032320e+19L; /* 0x4040, 0x80000000, 0x00000000 */ +#else +# error "Cannot handle this MANT_DIG" +#endif + + +#ifdef __STDC__ + long double __frexpl(long double x, int *eptr) +#else + long double __frexpl(x, eptr) + long double x; int *eptr; +#endif +{ + u_int32_t se, hx, ix, lx; + GET_LDOUBLE_WORDS(se,hx,lx,x); + ix = 0x7fff&se; + *eptr = 0; + if(ix==0x7fff||((ix|hx|lx)==0)) return x; /* 0,inf,nan */ + if (ix==0x0000) { /* subnormal */ + x *= two65; + GET_LDOUBLE_EXP(se,x); + ix = se&0x7fff; + *eptr = -65; + } + *eptr += ix-16382; + se = (se & 0x8000) | 0x3ffe; + SET_LDOUBLE_EXP(x,se); + return x; +} +weak_alias (__frexpl, frexpl) diff --git a/sysdeps/libm-ieee754/s_ldexpl.c b/sysdeps/libm-ieee754/s_ldexpl.c new file mode 100644 index 0000000000..bf64c89898 --- /dev/null +++ b/sysdeps/libm-ieee754/s_ldexpl.c @@ -0,0 +1,37 @@ +/* s_ldexpl.c -- long double version of s_ldexp.c. + * Conversion to long double by Ulrich Drepper, + * Cygnus Support, drepper@cygnus.com. + */ + +/* + * ==================================================== + * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. + * + * Developed at SunPro, a Sun Microsystems, Inc. business. + * Permission to use, copy, modify, and distribute this + * software is freely granted, provided that this notice + * is preserved. + * ==================================================== + */ + +#if defined(LIBM_SCCS) && !defined(lint) +static char rcsid[] = "$NetBSD: $"; +#endif + +#include "math.h" +#include "math_private.h" +#include <errno.h> + +#ifdef __STDC__ + long double __ldexpl(long double value, int exp) +#else + long double __ldexpl(value, exp) + long double value; int exp; +#endif +{ + if(!__finitel(value)||value==0.0) return value; + value = __scalbnl(value,exp); + if(!__finitel(value)||value==0.0) errno = ERANGE; + return value; +} +weak_alias (__ldexpl, ldexpl) |