Use hardware remainder on amd64 since it is 5 to 10 times faster than
software remainder and is already used for remquo().
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parent
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commit
02ef796d23
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=176227
@ -2,6 +2,7 @@
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ARCH_SRCS = e_sqrt.S e_sqrtf.S s_llrint.S s_llrintf.S s_llrintl.S \
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s_logbl.S s_lrint.S s_lrintf.S s_lrintl.S \
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s_remquo.S s_remquof.S s_rintl.S s_scalbn.S s_scalbnf.S s_scalbnl.S
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e_remainder.S e_remainderf.S s_remquo.S s_remquof.S \
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s_rintl.S s_scalbn.S s_scalbnf.S s_scalbnl.S
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LDBL_PREC = 64
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SYM_MAPS += ${.CURDIR}/amd64/Symbol.map
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53
lib/msun/amd64/e_remainder.S
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53
lib/msun/amd64/e_remainder.S
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@ -0,0 +1,53 @@
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/*
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* Copyright (c) 1993,94 Winning Strategies, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Winning Strategies, Inc.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Based on the i387 version written by:
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* J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc.
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*/
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#include <machine/asm.h>
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RCSID("from: FreeBSD: src/lib/msun/i387/e_remainder.S,v 1.8 2005/02/04 14:08:32 das Exp")
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__FBSDID("$FreeBSD$")
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ENTRY(remainder)
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movsd %xmm0,-8(%rsp)
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movsd %xmm1,-16(%rsp)
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fldl -16(%rsp)
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fldl -8(%rsp)
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1: fprem1
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fstsw %ax
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testw $0x400,%ax
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jne 1b
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fstpl -8(%rsp)
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movsd -8(%rsp),%xmm0
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fstp %st
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ret
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23
lib/msun/amd64/e_remainderf.S
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23
lib/msun/amd64/e_remainderf.S
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@ -0,0 +1,23 @@
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/*
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* Based on the i387 version written by J.T. Conklin <jtc@netbsd.org>.
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* Public domain.
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*/
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#include <machine/asm.h>
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RCSID("from: $NetBSD: e_remainderf.S,v 1.2 1995/05/08 23:49:47 jtc Exp $")
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__FBSDID("$FreeBSD$")
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ENTRY(remainderf)
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movss %xmm0,-4(%rsp)
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movss %xmm1,-8(%rsp)
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flds -8(%rsp)
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flds -4(%rsp)
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1: fprem1
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fstsw %ax
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testw $0x400,%ax
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jne 1b
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fstps -4(%rsp)
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movss -4(%rsp),%xmm0
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fstp %st
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ret
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