* 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. 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.
This commit is contained in:
Roland McGrath
parent
adc6ff7f81
commit
e6c9a67a0b
15
ChangeLog
15
ChangeLog
@ -1,5 +1,10 @@
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Thu Jul 11 20:09:55 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu>
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* math/Makefile (calls): Add s_frexp, s_ldexp.
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(routines): Remove them and &f from here.
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* sys/socket.h: New file, wrapper for socket/sys/socket.h.
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* nss/nss_files/files-service.c (getservbyname): Take second arg PROTO
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and check it.
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@ -33,6 +38,16 @@ Thu Jul 11 03:21:10 1996 Ulrich Drepper <drepper@cygnus.com>
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* catgets/gencat.c (write_out): Move code to determine new
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best size out of inner loop.
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Thu Jul 11 00:22:40 1996 Ulrich Drepper <drepper@cygnus.com>
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* sysdeps/libm-ieee754/s_frexpl.c: New file. `long double'
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implementation of frexp() function.
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* sysdeps/libm-ieee754/s_ldexpl.c: New file. `long double'
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implementation of ldexp() function.
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* sysdeps/libm-i387/s_isnanl.c (isnanl): Mask explicit one
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out before or'ing.
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Wed Jul 10 05:24:40 1996 David Mosberger-Tang <davidm@azstarnet.com>
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* misc/mntent.c: Include <sys/types.h>.
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47
FAQ
47
FAQ
@ -43,6 +43,9 @@ please let me know.
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[Q11] ``Where are the DST_* constants found in <sys/time.h> on many
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systems?''
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[Q12] ``The `gencat' utility cannot process the input which are
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successfully used on my Linux libc based system. Why?''
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~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
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[Q1] ``What systems does the GNU C Library run on?''
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@ -133,12 +136,12 @@ Library.
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form the tools from the GNU gettext package are necessary. See
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ftp://prep.ai.mit.edu/pub/gnu or better any mirror site.
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* lots of diskspace (for i386-linux this means, e.g., ~70MB).
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* lots of diskspace (for i?86-linux this means, e.g., ~70MB).
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You should avoid compiling on a NFS mounted device. This is very
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slow.
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* plenty of time (approx 1h for i386-linux on i586@133 or 2.5h on
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* plenty of time (approx 1h for i?86-linux on i586@133 or 2.5h on
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i486@66 or 4.5h on i486@33).
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If you have some more measurements let me know.
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@ -191,7 +194,7 @@ For Linux there are today two libc versions:
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libc-5 current ELF libc
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GNU libc will have the major number 6 and therefore you can have this
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additionally installed. For more information consult documenation for
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additionally installed. For more information consult documentation for
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shared library handling. The Makefiles of GNU libc will automatically
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generate the needed symbolic links which the linker will use.
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@ -296,6 +299,44 @@ Instead GNU libc contains the zone database handling and compatibility
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code for POSIX TZ environment variable handling.
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~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
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[Q12] ``The `gencat' utility cannot process the input which are
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successfully used on my Linux libc based system. Why?''
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[A12] {UD} Unlike the author of the `gencat' program which is distributed
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with Linux libc I have read the underlying standards before writing the
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code. It is completely compatible with the specification given in
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X/Open Portability Guide.
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To ease the transition from the Linux version some of the non-standard
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features are also present in the `gencat' program of GNU libc. This
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mainly includes the use of symbols for the message number and the automatic
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generation of header files which contain the needed #defines to map the
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symbols to integers.
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Here is a simple SED script to convert at least some Linux specific
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catalog files to the XPG4 form:
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-----------------------------------------------------------------------
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# Change catalog source in Linux specific format to standard XPG format.
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# Ulrich Drepper <drepper@cygnus.com>, 1996.
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#
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/^\$ #/ {
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h
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s/\$ #\([^ ]*\).*/\1/
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x
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s/\$ #[^ ]* *\(.*\)/\$ \1/
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}
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/^# / {
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s/^# \(.*\)/\1/
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G
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s/\(.*\)\n\(.*\)/\2 \1/
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}
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-----------------------------------------------------------------------
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~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
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Answers were given by:
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@ -55,9 +55,8 @@ long-m-routines = $(patsubst %_rl,%l_r,$(libm-calls:=l)) # not ready yet
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# These functions are in libc instead of libm because __printf_fp
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# calls them, so any program using printf will need them linked in,
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# and we don't want to have to link every program with -lm.
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calls = s_isinf s_isnan s_finite s_copysign s_modf s_scalbn
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routines = $(calls) $(calls:=f) $(long-c-$(long-double-fcts)) \
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s_frexp s_ldexp s_frexpf s_ldexpf
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calls = s_isinf s_isnan s_finite s_copysign s_modf s_scalbn s_frexp s_ldexp
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routines = $(calls) $(calls:=f) $(long-c-$(long-double-fcts))
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long-c-yes = $(calls:=l)
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distribute += $(long-c-yes:=.c)
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@ -36,10 +36,11 @@ static char rcsid[] = "$NetBSD: $";
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int32_t se,hx,lx;
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GET_LDOUBLE_WORDS(se,hx,lx,x);
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se = (se & 0x7fff) << 1;
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lx |= hx;
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/* The additional &hx is required because Intel's extended format
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has the normally implicit 1 explicit present. Sigh! */
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se |= (u_int32_t)((lx|(-lx))&hx)>>31;
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/* The additional & 0x7fffffff is required because Intel's
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extended format has the normally implicit 1 explicit
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present. Sigh! */
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lx |= hx & 0x7fffffff;
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se |= (u_int32_t)(lx|(-lx))>>31;
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se = 0xfffe - se;
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return (int)((u_int32_t)(se))>>16;
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}
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69
sysdeps/libm-ieee754/s_frexpl.c
Normal file
69
sysdeps/libm-ieee754/s_frexpl.c
Normal file
@ -0,0 +1,69 @@
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/* s_frexpl.c -- long double version of s_frexp.c.
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* Conversion to long double by Ulrich Drepper,
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* Cygnus Support, drepper@cygnus.com.
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*/
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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#if defined(LIBM_SCCS) && !defined(lint)
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static char rcsid[] = "$NetBSD: $";
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#endif
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/*
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* for non-zero x
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* x = frexpl(arg,&exp);
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* return a long double fp quantity x such that 0.5 <= |x| <1.0
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* and the corresponding binary exponent "exp". That is
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* arg = x*2^exp.
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* If arg is inf, 0.0, or NaN, then frexpl(arg,&exp) returns arg
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* with *exp=0.
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*/
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#include "math.h"
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#include "math_private.h"
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#ifdef __STDC__
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static const long double
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#else
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static long double
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#endif
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#if LDBL_MANT_DIG == 64
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two65 = 3.68934881474191032320e+19L; /* 0x4040, 0x80000000, 0x00000000 */
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#else
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# error "Cannot handle this MANT_DIG"
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#endif
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#ifdef __STDC__
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long double __frexpl(long double x, int *eptr)
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#else
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long double __frexpl(x, eptr)
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long double x; int *eptr;
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#endif
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{
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u_int32_t se, hx, ix, lx;
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GET_LDOUBLE_WORDS(se,hx,lx,x);
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ix = 0x7fff&se;
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*eptr = 0;
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if(ix==0x7fff||((ix|hx|lx)==0)) return x; /* 0,inf,nan */
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if (ix==0x0000) { /* subnormal */
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x *= two65;
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GET_LDOUBLE_EXP(se,x);
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ix = se&0x7fff;
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*eptr = -65;
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}
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*eptr += ix-16382;
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se = (se & 0x8000) | 0x3ffe;
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SET_LDOUBLE_EXP(x,se);
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return x;
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}
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weak_alias (__frexpl, frexpl)
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37
sysdeps/libm-ieee754/s_ldexpl.c
Normal file
37
sysdeps/libm-ieee754/s_ldexpl.c
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@ -0,0 +1,37 @@
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/* s_ldexpl.c -- long double version of s_ldexp.c.
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* Conversion to long double by Ulrich Drepper,
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* Cygnus Support, drepper@cygnus.com.
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*/
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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#if defined(LIBM_SCCS) && !defined(lint)
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static char rcsid[] = "$NetBSD: $";
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#endif
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#include "math.h"
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#include "math_private.h"
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#include <errno.h>
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#ifdef __STDC__
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long double __ldexpl(long double value, int exp)
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#else
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long double __ldexpl(value, exp)
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long double value; int exp;
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#endif
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{
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if(!__finitel(value)||value==0.0) return value;
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value = __scalbnl(value,exp);
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if(!__finitel(value)||value==0.0) errno = ERANGE;
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return value;
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}
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weak_alias (__ldexpl, ldexpl)
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