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Completely remove s_ilogb.S as the assembler implementation gives very little

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speed improvement to none at all over the MI version.

Submitted by:	bde
This commit is contained in:
Stefan Farfeleder 2004-06-20 10:42:23 +00:00
parent f7748f6e01
commit c8764bba5a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=130775
2 changed files with 1 additions and 84 deletions
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2
lib/msun/Makefile
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@ -52,7 +52,7 @@ ARCH_SRCS = s_copysign.S s_copysignf.S
ARCH= i387
ARCH_SRCS = e_acos.S e_asin.S e_atan2.S e_exp.S e_fmod.S e_log.S e_log10.S \
e_remainder.S e_scalb.S e_sqrt.S s_atan.S s_ceil.S s_copysign.S \
s_cos.S s_finite.S s_floor.S s_ilogb.S s_logb.S \
s_cos.S s_finite.S s_floor.S s_logb.S \
s_rint.S s_scalbn.S s_significand.S s_sin.S s_tan.S
# Broken:
# ARCH_SRCS+= s_log1p.S

83
lib/msun/i387/s_ilogb.S
View File

@ -1,83 +0,0 @@
/*
* Copyright (c) 1994 Winning Strategies, Inc.
* 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 Winning Strategies, Inc.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*/
/*
* Written by:
* J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc.
*/
#include <machine/_limits.h>
#include <machine/asm.h>
RCSID("$FreeBSD$")
#define FP_ILOGB0 (-__INT_MAX)
#define FP_ILOGBNAN __INT_MAX
#define FP_ILOGBINF __INT_MAX
ENTRY(ilogb)
pushl %ebp
movl %esp,%ebp
subl $4,%esp
fldl 8(%ebp)
fxtract
fstp %st(0)
fistpl -4(%ebp)
movl -4(%ebp),%eax
/* fistpl yields __INT_MIN for NaN, Inf and 0. */
cmpl $__INT_MIN,%eax
je .L2
.L1:
leave
ret
.L2:
fldl 8(%ebp)
fldz
fucompp
fnstsw %ax
sahf
jp .L3
jz .L4
movl $FP_ILOGBINF,%eax
jmp .L1
.L3:
movl $FP_ILOGBNAN,%eax
jmp .L1
.L4:
movl $FP_ILOGB0,%eax
jmp .L1