update from main archive 961229 cvs/libc20x-970306 cvs/libc-961231 cvs/libc-961230

Mon Dec 30 01:32:59 1996  Ulrich Drepper  <drepper@cygnus.com>

	* tme/localtime.c: Rewrite so that localtime_r does not call tzset,
	but localtime does.

	* features.h: Rename ANSI C to ISO C.
	Mention __GLIBC__ and __GLIBC_MINOR__ macros.

	* gnu-versions.h: Add _GNU_GETOPT_INTERFACE_VERSION.
	* posix/getopt.c: Use _GNU_GETOPT_INTERFACE_VERSION to check
	whether we can elide the code.
	* posix/getopt1.c: Likewise.
	* posix/Makefile: Correct copyright.

	* elf/dl-error.c (_dl_catch_error): Clear `catch' also when error
	occurred.
	* elf/dl-support.c (_dl_sysdep_open_zero_fill): Don't define if
	MAP_ANON is defined.
	* elf/eval.c: Use __getline instead of getline.
	* elf/rtld.c (dl_main): Check return value of _dl_new_object
	function for NULL.
	* sysdeps/generic/dl-cache.c: Update copyright.

	* signal/Makefile: Correct copyright.
	(routines): Remove gsignal and ssignal.  Add bsd_signal.
	* signal/gsignal.c: Removed.  Now is made an alias.
	* signal/ssignal.c: Likewise.
	* sysdeps/posix/raise.c: Add alias gsignal.
	* sysdeps/stub/raise.c: Likewise.
	* sysdeps/posix/signal.c: Add alias ssignal.
	* sysdeps/stub/signal.c: Likewise.
	* signal/signal.h: Declare bsd_signal.  Define signal as bsd_signal
	if __FAVOR_BSD.
	* sysdeps/posix/bsd_signal.c: New file.  Implementation of XPG
	function.

	* sysdeps/unix/sysv/linux/signal.c: Add explanation.

	* socket/sys/un.h: Define SUN_LEN according to POSIX.1g.

	* stdio-common/Makefile (tests): Add scanf10.
	* stdio-common/scanf10.c: New file.
	* stdio-common/vfscanf.c: Decrement counter if EOF is read while
	reading string.

	* sysdeps/libm-i387/e_acos.S: Use END, not PSEUDO_END.
	* sysdeps/libm-i387/e_acosl.S: Likewise.
	* sysdeps/libm-i387/e_asin.S: Likewise.
	* sysdeps/libm-i387/e_asinl.S: Likewise.
	* sysdeps/libm-i387/e_atan2.S: Likewise.
	* sysdeps/libm-i387/e_atan2f.S: Likewise.
	* sysdeps/libm-i387/e_atan2l.S: Likewise.
	* sysdeps/libm-i387/e_exp.S: Likewise.
	* sysdeps/libm-i387/e_expl.S: Likewise.
	* sysdeps/libm-i387/e_fmod.S: Likewise.
	* sysdeps/libm-i387/e_fmodl.S: Likewise.
	* sysdeps/libm-i387/e_log.S: Likewise.
	* sysdeps/libm-i387/e_log10.S: Likewise.
	* sysdeps/libm-i387/e_log10l.S: Likewise.
	* sysdeps/libm-i387/e_logl.S: Likewise.
	* sysdeps/libm-i387/e_remainder.S: Likewise.
	* sysdeps/libm-i387/e_remainderf.S: Likewise.
	* sysdeps/libm-i387/e_remainderl.S: Likewise.
	* sysdeps/libm-i387/e_scalb.S: Likewise.
	* sysdeps/libm-i387/e_scalbl.S: Likewise.
	* sysdeps/libm-i387/e_sqrt.S: Likewise.
	* sysdeps/libm-i387/e_sqrtf.S: Likewise.
	* sysdeps/libm-i387/e_sqrtl.S: Likewise.
	* sysdeps/libm-i387/s_atan.S: Likewise.
	* sysdeps/libm-i387/s_atanf.S: Likewise.
	* sysdeps/libm-i387/s_atanl.S: Likewise.
	* sysdeps/libm-i387/s_ceil.S: Likewise.
	* sysdeps/libm-i387/s_ceilf.S: Likewise.
	* sysdeps/libm-i387/s_ceill.S: Likewise.
	* sysdeps/libm-i387/s_copysign.S: Likewise.
	* sysdeps/libm-i387/s_copysignf.S: Likewise.
	* sysdeps/libm-i387/s_copysignl.S: Likewise.
	* sysdeps/libm-i387/s_cos.S: Likewise.
	* sysdeps/libm-i387/s_cosf.S: Likewise.
	* sysdeps/libm-i387/s_cosl.S: Likewise.
	* sysdeps/libm-i387/s_finite.S: Likewise.
	* sysdeps/libm-i387/s_finitef.S: Likewise.
	* sysdeps/libm-i387/s_finitel.S: Likewise.
	* sysdeps/libm-i387/s_floor.S: Likewise.
	* sysdeps/libm-i387/s_floorf.S: Likewise.
	* sysdeps/libm-i387/s_floorl.S: Likewise.
	* sysdeps/libm-i387/s_ilogb.S: Likewise.
	* sysdeps/libm-i387/s_ilogbf.S: Likewise.
	* sysdeps/libm-i387/s_ilogbl.S: Likewise.
	* sysdeps/libm-i387/s_log1p.S: Likewise.
	* sysdeps/libm-i387/s_log1pf.S: Likewise.
	* sysdeps/libm-i387/s_log1pl.S: Likewise.
	* sysdeps/libm-i387/s_logb.S: Likewise.
	* sysdeps/libm-i387/s_logbf.S: Likewise.
	* sysdeps/libm-i387/s_logbl.S: Likewise.
	* sysdeps/libm-i387/s_rint.S: Likewise.
	* sysdeps/libm-i387/s_rintf.S: Likewise.
	* sysdeps/libm-i387/s_rintl.S: Likewise.
	* sysdeps/libm-i387/s_scalbn.S: Likewise.
	* sysdeps/libm-i387/s_scalbnf.S: Likewise.
	* sysdeps/libm-i387/s_scalbnl.S: Likewise.
	* sysdeps/libm-i387/s_significand.S: Likewise.
	* sysdeps/libm-i387/s_significandf.S: Likewise.
	* sysdeps/libm-i387/s_significandl.S: Likewise.
	* sysdeps/libm-i387/s_sin.S: Likewise.
	* sysdeps/libm-i387/s_sinf.S: Likewise.
	* sysdeps/libm-i387/s_sinl.S: Likewise.

	* sysdeps/libm-i387/e_log.S: Use fyl2xp1 instruction for values
	near 1 to increase precision.
	* sysdeps/libm-i387/e_log10.S: Likewise.
	* sysdeps/libm-i387/e_log10l.S: Likewise.
	* sysdeps/libm-i387/e_logl.S: Likewise.

	* sysdeps/libm-i387/s_cos.S: Use testl instead of andw.
	* sysdeps/libm-i387/s_cosl.S: Likewise.
	* sysdeps/libm-i387/s_sin.S: Likewise.
	* sysdeps/libm-i387/s_sinl.S: Likewise.
	* sysdeps/libm-i387/s_tan.S: Likewise.
	* sysdeps/libm-i387/s_tanl.S: Likewise.

	* sysdeps/libm-i387/e_acosf.S: New file.  Add float versions.
	* sysdeps/libm-i387/e_asinf.S: Likewise.
	* sysdeps/libm-i387/e_expf.S: Likewise.
	* sysdeps/libm-i387/e_fmodf.S: Likewise.
	* sysdeps/libm-i387/e_log10f.S: Likewise.
	* sysdeps/libm-i387/e_logf.S: Likewise.
	* sysdeps/libm-i387/e_scalbf.S: Likewise.

	* sysdeps/libm-i387/e_acosh.S: New file.  Highly optimized versions.
	* sysdeps/libm-i387/e_acoshf.S: Likewise.
	* sysdeps/libm-i387/e_acoshl.S: Likewise.
	* sysdeps/libm-i387/e_atanh.S: Likewise.
	* sysdeps/libm-i387/e_atanhf.S: Likewise.
	* sysdeps/libm-i387/e_atanhl.S: Likewise.
	* sysdeps/libm-i387/e_asinh.S: Likewise.
	* sysdeps/libm-i387/e_asinhf.S: Likewise.
	* sysdeps/libm-i387/e_asinhl.S: Likewise.

	* sysdeps/libm-ieee754/s_asinhf.c: Tweak a bit.  Use lower levels
	for simplified handling.

	* sysdeps/unix/sysv/linux/syscalls.list: Add query_module.

Sun Dec 22 01:39:29 1996  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* inet/rcmd.c (rcmd): Set h_errno before calling herror.
	* inet/rexec.c (rexec): Likewise.

Sat Dec 21 21:47:08 1996  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/unix/sysv/linux/m68k/setjmp.c (__setjmp): Make it really
	compatible.

Sun Dec 22 03:23:33 1996  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/libm-i387/s_log1p.S: Use fyl2xp1 for numbers in range
	-0.29 <= x <= 0.29, otherwise the old method.
	* sysdeps/libm-i387/s_log1pf.S: Likewise.
	* sysdeps/libm-i387/s_log1pl.S: Likewise.

1 files changed, 111 insertions, 0 deletions

diff --git a/sysdeps/libm-i387/e_acoshl.S b/sysdeps/libm-i387/e_acoshl.S
new file mode 100644
index 0000000000..b0fa45c44e
--- /dev/null
+++ b/sysdeps/libm-i387/e_acoshl.S
@@ -0,0 +1,111 @@
+/* ix87 specific implementation of arcsinh.
+   Copyright (C) 1996 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <machine/asm.h>
+
+#ifdef __ELF__
+	.section .rodata
+#else
+	.text
+#endif
+
+	.align ALIGNARG(4)
+	/* Please note that we use double value for 1.0.  This number
+	   has an exact representation and so we don't get accuracy
+	   problems.  The advantage is that the code is simpler.  */
+	ASM_TYPE_DIRECTIVE(one,@object)
+one:	.double 1.0
+	ASM_SIZE_DIRECTIVE(one)
+	/* It is not important that this constant is precise.  It is only
+	   a value which is known to be on the safe side for using the
+	   fyl2xp1 instruction.  */
+	ASM_TYPE_DIRECTIVE(limit,@object)
+limit:	.double 0.29
+	ASM_SIZE_DIRECTIVE(limit)
+
+#ifdef PIC
+#define MO(op) op##@GOTOFF(%edx)
+#else
+#define MO(op) op
+#endif
+
+	.text
+ENTRY(__ieee754_acoshl)
+	movl	12(%esp), %ecx
+	cmpl	$0x3fff, %ecx
+	jl	5f			// < 1 => invalid
+	fldln2				// log(2)
+	fldt	4(%esp)			// x : log(2)
+	cmpl	$0x4020, %ecx
+	ja	3f			// x > 2^34
+#ifdef	PIC
+	call	1f
+1:	popl	%edx
+	addl	$_GLOBAL_OFFSET_TABLE_+[.-1b], %edx
+#endif
+	cmpl	$0x4000, %ecx
+	ja	4f			// x > 2
+
+	// 1 <= x <= 2 => y = log1p(x-1+sqrt(2*(x-1)+(x-1)^2))
+	fsubl	MO(one)			// x-1 : log(2)
+	fld	%st			// x-1 : x-1 : log(2)
+	fmul	%st(1)			// (x-1)^2 : x-1 : log(2)
+	fadd	%st(1)			// x-1+(x-1)^2 : x-1 : log(2)
+	fadd	%st(1)			// 2*(x-1)+(x-1)^2 : x-1 : log(2)
+	fsqrt				// sqrt(2*(x-1)+(x-1)^2) : x-1 : log(2)
+	faddp				// x-1+sqrt(2*(x-1)+(x-1)^2) : log(2)
+	fcoml	MO(limit)
+	fnstsw
+	sahf
+	ja	2f
+	fyl2xp1				// log1p(x-1+sqrt(2*(x-1)+(x-1)^2))
+	ret
+
+2:	faddl	MO(one)			// x+sqrt(2*(x-1)+(x-1)^2) : log(2)
+	fyl2x				// log(x+sqrt(2*(x-1)+(x-1)^2))
+	ret
+
+	// x > 2^34 => y = log(x) + log(2)
+	.align ALIGNARG(4)
+3:	fyl2x				// log(x)
+	fldln2				// log(2) : log(x)
+	faddp				// log(x)+log(2)
+	ret
+
+	// 2^34 > x > 2 => y = log(2*x - 1/(x+sqrt(x*x-1)))
+	.align ALIGNARG(4)
+4:	fld	%st			// x : x : log(2)
+	fadd	%st, %st(1)		// x : 2*x : log(2)
+	fld	%st			// x : x : 2*x : log(2)
+	fmul	%st(1)			// x^2 : x : 2*x : log(2)
+	fsubl	MO(one)			// x^2-1 : x : 2*x : log(2)
+	fsqrt				// sqrt(x^2-1) : x : 2*x : log(2)
+	faddp				// x+sqrt(x^2-1) : 2*x : log(2)
+	fdivrl	MO(one)			// 1/(x+sqrt(x^2-1)) : 2*x : log(2)
+	fsubrp				// 2*x+1/(x+sqrt(x^2)-1) : log(2)
+	fyl2x				// log(2*x+1/(x+sqrt(x^2-1)))
+	ret
+
+	// x < 1 => NaN
+	.align ALIGNARG(4)
+5:	fldz
+	fdiv	%st, %st(0)
+	ret
+END(__ieee754_acoshl)