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[src/trunk]: src Add ilogbl(3).
details: https://anonhg.NetBSD.org/src/rev/b48a2673bb84
branches: trunk
changeset: 767747:b48a2673bb84
user: joerg <joerg%NetBSD.org@localhost>
date: Thu Jul 28 22:32:28 2011 +0000
description:
Add ilogbl(3).
diffstat:
distrib/sets/lists/comp/mi | 5 ++-
include/math.h | 4 +-
lib/libm/Makefile | 10 ++--
lib/libm/arch/i387/s_ilogbl.S | 24 +++++++++++++
lib/libm/man/ilogb.3 | 17 +++++----
lib/libm/src/s_ilogb.c | 6 ++-
lib/libm/src/s_ilogbl.c | 76 +++++++++++++++++++++++++++++++++++++++++++
7 files changed, 126 insertions(+), 16 deletions(-)
diffs (269 lines):
diff -r 70265b3c8863 -r b48a2673bb84 distrib/sets/lists/comp/mi
--- a/distrib/sets/lists/comp/mi Thu Jul 28 22:28:07 2011 +0000
+++ b/distrib/sets/lists/comp/mi Thu Jul 28 22:32:28 2011 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: mi,v 1.1648 2011/07/28 21:10:25 joerg Exp $
+# $NetBSD: mi,v 1.1649 2011/07/28 22:32:28 joerg Exp $
#
# Note: don't delete entries from here - mark them as "obsolete" instead.
#
@@ -6782,6 +6782,7 @@
./usr/share/man/cat3/ilog2.0 comp-c-catman .cat
./usr/share/man/cat3/ilogb.0 comp-c-catman .cat
./usr/share/man/cat3/ilogbf.0 comp-c-catman .cat
+./usr/share/man/cat3/ilogbl.0 comp-c-catman .cat
./usr/share/man/cat3/imaxabs.0 comp-c-catman .cat
./usr/share/man/cat3/imaxdiv.0 comp-c-catman .cat
./usr/share/man/cat3/inch.0 comp-c-catman .cat
@@ -12877,6 +12878,7 @@
./usr/share/man/html3/ilog2.html comp-c-htmlman html
./usr/share/man/html3/ilogb.html comp-c-htmlman html
./usr/share/man/html3/ilogbf.html comp-c-htmlman html
+./usr/share/man/html3/ilogbl.html comp-c-htmlman html
./usr/share/man/html3/imaxabs.html comp-c-htmlman html
./usr/share/man/html3/imaxdiv.html comp-c-htmlman html
./usr/share/man/html3/inch.html comp-c-htmlman html
@@ -18891,6 +18893,7 @@
./usr/share/man/man3/ilog2.3 comp-c-man .man
./usr/share/man/man3/ilogb.3 comp-c-man .man
./usr/share/man/man3/ilogbf.3 comp-c-man .man
+./usr/share/man/man3/ilogbl.3 comp-c-man .man
./usr/share/man/man3/imaxabs.3 comp-c-man .man
./usr/share/man/man3/imaxdiv.3 comp-c-man .man
./usr/share/man/man3/inch.3 comp-c-man .man
diff -r 70265b3c8863 -r b48a2673bb84 include/math.h
--- a/include/math.h Thu Jul 28 22:28:07 2011 +0000
+++ b/include/math.h Thu Jul 28 22:32:28 2011 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: math.h,v 1.55 2011/07/26 16:10:15 joerg Exp $ */
+/* $NetBSD: math.h,v 1.56 2011/07/28 22:32:28 joerg Exp $ */
/*
* ====================================================
@@ -498,6 +498,8 @@
int __signbitl(long double);
#endif
+int ilogbl(long double);
+long double logbl(long double);
long double scalbnl(long double, int);
__END_DECLS
diff -r 70265b3c8863 -r b48a2673bb84 lib/libm/Makefile
--- a/lib/libm/Makefile Thu Jul 28 22:28:07 2011 +0000
+++ b/lib/libm/Makefile Thu Jul 28 22:32:28 2011 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.114 2011/07/28 21:10:29 joerg Exp $
+# $NetBSD: Makefile,v 1.115 2011/07/28 22:32:28 joerg Exp $
#
# @(#)Makefile 5.1beta 93/09/24
#
@@ -69,8 +69,8 @@
e_remainderf.S e_scalb.S e_scalbf.S e_sqrt.S e_sqrtf.S s_atan.S \
s_atanf.S s_ceil.S s_ceilf.S s_copysign.S s_copysignf.S s_cos.S \
s_cosf.S s_finite.S s_finitef.S s_floor.S s_floorf.S s_ilogb.S \
- s_ilogbf.S s_log1p.S s_log1pf.S s_logb.S s_logbf.S s_rint.S \
- s_rintf.S s_scalbn.S s_scalbnf.S s_significand.S \
+ s_ilogbf.S s_ilogbl.S s_log1p.S s_log1pf.S s_logb.S s_logbf.S \
+ s_rint.S s_rintf.S s_scalbn.S s_scalbnf.S s_significand.S \
s_significandf.S s_sin.S s_sinf.S s_tan.S s_tanf.S lrint.S
# do not pick up the i387 asm version, it is incorrect
s_modf.o s_modf.pico s_modf.po s_modf.d: s_modf.c
@@ -137,7 +137,7 @@
s_ceilf.c s_copysign.c s_copysignf.c s_copysignl.c s_cos.c s_cosf.c s_erf.c \
s_erff.c s_exp2.c s_exp2f.c s_expm1.c s_expm1f.c s_fabsf.c s_fabsl.c \
s_finite.c s_finitef.c \
- s_floor.c s_floorf.c s_frexpf.c s_ilogb.c s_ilogbf.c \
+ s_floor.c s_floorf.c s_frexpf.c s_ilogb.c s_ilogbf.c s_ilogbl.c \
s_isinff.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_remquo.c s_remquof.c s_rint.c s_rintf.c s_round.c s_roundf.c s_scalbn.c \
@@ -257,7 +257,7 @@
MLINKS+=ieee_test.3 logb.3 ieee_test.3 logbf.3
MLINKS+=ieee_test.3 scalb.3 ieee_test.3 scalbf.3
MLINKS+=ieee_test.3 significand.3 ieee_test.3 significandf.3
-MLINKS+=ilogb.3 ilogbf.3
+MLINKS+=ilogb.3 ilogbf.3 ilogb.3 ilogbl.3
MLINKS+=isinff.3 isnanf.3
MLINKS+=j0.3 j0f.3 j0.3 j1.3 j0.3 j1f.3 j0.3 jn.3 j0.3 jnf.3 \
j0.3 y0.3 j0.3 y0f.3 j0.3 y1.3 j0.3 y1f.3 j0.3 yn.3 j0.3 ynf.3
diff -r 70265b3c8863 -r b48a2673bb84 lib/libm/arch/i387/s_ilogbl.S
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/libm/arch/i387/s_ilogbl.S Thu Jul 28 22:32:28 2011 +0000
@@ -0,0 +1,24 @@
+/*
+ * Written by J.T. Conklin <jtc%NetBSD.org@localhost>.
+ * Public domain.
+ */
+
+#include <machine/asm.h>
+
+RCSID("$NetBSD: s_ilogbl.S,v 1.1 2011/07/28 22:32:28 joerg Exp $")
+
+#include "abi.h"
+
+ENTRY(ilogbl)
+ fldt ARG_LONG_DOUBLE_ONE
+ fxtract
+ fstp %st
+#ifdef __i386__
+ pushl %eax
+ fistpl 0(%esp)
+ popl %eax
+#else
+ fistpl -4(%rsp)
+ movl -4(%rsp), %eax
+#endif
+ ret
diff -r 70265b3c8863 -r b48a2673bb84 lib/libm/man/ilogb.3
--- a/lib/libm/man/ilogb.3 Thu Jul 28 22:28:07 2011 +0000
+++ b/lib/libm/man/ilogb.3 Thu Jul 28 22:32:28 2011 +0000
@@ -1,4 +1,4 @@
-.\" $NetBSD: ilogb.3,v 1.1 2011/05/10 06:38:33 jruoho Exp $
+.\" $NetBSD: ilogb.3,v 1.2 2011/07/28 22:32:29 joerg Exp $
.\"
.\" Copyright (c) 2011 Jukka Ruohonen <jruohonen%iki.fi@localhost>
.\" All rights reserved.
@@ -24,12 +24,13 @@
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
.\" POSSIBILITY OF SUCH DAMAGE.
.\"
-.Dd May 10, 2011
+.Dd July 29, 2011
.Dt ILOGB 3
.Os
.Sh NAME
.Nm ilogb ,
-.Nm ilogbf
+.Nm ilogbf ,
+.Nm ilogbl
.Nd an unbiased exponent
.Sh LIBRARY
.Lb libm
@@ -39,11 +40,14 @@
.Fn ilogb "double x"
.Ft int
.Fn ilogbf "float x"
+.Ft int
+.Fn ilogbl "long double x"
.Sh DESCRIPTION
The
-.Fn ilogb
+.Fn ilogb ,
+.Fn ilogbf
and
-.Fn ilogbf
+.Fn ilogbl
functions return the exponent of the non-zero real floating-point number
.Fa x
as a signed integer value.
@@ -105,6 +109,3 @@
.Dv FP_ILOGBNAN
is defined currently in
.Nx .
-Furthermore, the
-.Vt long double
-variant of the functions is not yet supported.
diff -r 70265b3c8863 -r b48a2673bb84 lib/libm/src/s_ilogb.c
--- a/lib/libm/src/s_ilogb.c Thu Jul 28 22:28:07 2011 +0000
+++ b/lib/libm/src/s_ilogb.c Thu Jul 28 22:32:28 2011 +0000
@@ -12,7 +12,7 @@
#include <sys/cdefs.h>
#if defined(LIBM_SCCS) && !defined(lint)
-__RCSID("$NetBSD: s_ilogb.c,v 1.12 2002/05/26 22:01:56 wiz Exp $");
+__RCSID("$NetBSD: s_ilogb.c,v 1.13 2011/07/28 22:32:29 joerg Exp $");
#endif
/* ilogb(double x)
@@ -24,6 +24,10 @@
#include "math.h"
#include "math_private.h"
+#ifndef __HAVE_LONG_DOUBLE
+__strong_alias(ilogbl,ilogb)
+#endif
+
int
ilogb(double x)
{
diff -r 70265b3c8863 -r b48a2673bb84 lib/libm/src/s_ilogbl.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/libm/src/s_ilogbl.c Thu Jul 28 22:32:28 2011 +0000
@@ -0,0 +1,76 @@
+/* $NetBSD: s_ilogbl.c,v 1.1 2011/07/28 22:32:29 joerg Exp $ */
+
+/*-
+ * Copyright (c) 2011 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Joerg Sonnenberger.
+ *
+ * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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>
+__RCSID("$NetBSD: s_ilogbl.c,v 1.1 2011/07/28 22:32:29 joerg Exp $");
+
+#include "namespace.h"
+
+#include <float.h>
+#include <math.h>
+#include <machine/ieee.h>
+
+#ifdef __HAVE_LONG_DOUBLE
+
+#if LDBL_MANT_DIG == 64
+#define FROM_UNDERFLOW 0x1p65L
+#elif LDBL_MANT_DIG == 113
+#define FROM_UNDERFLOW 0x1p114L
+#else
+#error Unsupported long double format
+#endif
+
+int
+ilogbl(long double x)
+{
+ union ieee_ext_u u;
+
+ if (x == 0.0L)
+ return 0x80000001; /* ilogbl(0) = 0x80000001 */
+
+ u.extu_ld = x;
+
+ if (u.extu_ext.ext_exp == EXT_EXP_INFNAN)
+ return 0x7fffffff;
+
+ if (u.extu_ext.ext_exp == 0) {
+ /*
+ * Scale denormalized numbers slightly,
+ * so that they are normal.
+ */
+ u.extu_ld *= FROM_UNDERFLOW;
+ return u.extu_ext.ext_exp - EXT_EXP_BIAS - LDBL_MANT_DIG - 1;
+ }
+ return u.extu_ext.ext_exp - EXT_EXP_BIAS;
+
+}
+
+#endif
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