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https://github.com/Stichting-MINIX-Research-Foundation/netbsd.git
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370 lines
9.3 KiB
ArmAsm
370 lines
9.3 KiB
ArmAsm
/* $NetBSD: systfloat.S,v 1.3 2008/04/28 20:23:04 martin Exp $ */
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/* This is a derivative work. */
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/*-
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* Copyright (c) 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Ross Harvey.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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===============================================================================
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This GNU assembler source file is part of TestFloat, Release 2a, a package
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of programs for testing the correctness of floating-point arithmetic
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complying to the IEC/IEEE Standard for Floating-Point.
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Written by John R. Hauser. More information is available through the Web
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page `http://HTTP.CS.Berkeley.EDU/~jhauser/arithmetic/TestFloat.html'.
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THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE. Although reasonable effort
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has been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT
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TIMES RESULT IN INCORRECT BEHAVIOR. USE OF THIS SOFTWARE IS RESTRICTED TO
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PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY
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AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE.
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Derivative works are acceptable, even for commercial purposes, so long as
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(1) they include prominent notice that the work is derivative, and (2) they
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include prominent notice akin to these four paragraphs for those parts of
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this code that are retained.
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===============================================================================
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*/
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.text
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/*
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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*/
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#include <machine/asm.h>
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ENTRY(syst_int32_to_floatx80)
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fildl 8(%esp)
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movl 4(%esp),%eax
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fstpt (%eax)
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ret $4
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/*
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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*/
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ENTRY(syst_int64_to_floatx80)
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fildq 8(%esp)
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movl 4(%esp),%eax
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fstpt (%eax)
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ret $4
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/*
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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*/
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ENTRY(syst_float32_to_floatx80)
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flds 8(%esp)
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movl 4(%esp),%eax
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fstpt (%eax)
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ret $4
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/*
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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*/
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ENTRY(syst_float64_to_floatx80)
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fldl 8(%esp)
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movl 4(%esp),%eax
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fstpt (%eax)
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ret $4
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/*
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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*/
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ENTRY(syst_floatx80_to_int32)
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fldt 4(%esp)
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subl $4,%esp
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fistpl (%esp)
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movl (%esp),%eax
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addl $4,%esp
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ret
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/*
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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*/
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ENTRY(syst_floatx80_to_int64)
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fldt 4(%esp)
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subl $8,%esp
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fistpq (%esp)
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movl (%esp),%eax
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movl 4(%esp),%edx
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addl $8,%esp
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ret
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/*
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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*/
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ENTRY(syst_floatx80_to_float32)
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fldt 4(%esp)
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subl $4,%esp
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fstps (%esp)
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movl (%esp),%eax
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addl $4,%esp
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ret
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/*
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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*/
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ENTRY(syst_floatx80_to_float64)
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fldt 4(%esp)
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subl $8,%esp
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fstpl (%esp)
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movl 4(%esp),%edx
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movl (%esp),%eax
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addl $8,%esp
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ret
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/*
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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*/
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ENTRY(syst_floatx80_round_to_int)
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fldt 8(%esp)
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frndint
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movl 4(%esp),%eax
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fstpt (%eax)
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ret $4
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/*
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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*/
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ENTRY(syst_floatx80_add)
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fldt 8(%esp)
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fldt 20(%esp)
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faddp
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movl 4(%esp),%eax
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fstpt (%eax)
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ret $4
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/*
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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*/
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ENTRY(syst_floatx80_sub)
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fldt 8(%esp)
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fldt 20(%esp)
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fsubrp
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movl 4(%esp),%eax
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fstpt (%eax)
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ret $4
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/*
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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*/
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ENTRY(syst_floatx80_mul)
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fldt 8(%esp)
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fldt 20(%esp)
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fmulp
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movl 4(%esp),%eax
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fstpt (%eax)
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ret $4
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/*
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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*/
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ENTRY(syst_floatx80_div)
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fldt 8(%esp)
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fldt 20(%esp)
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fdivrp
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movl 4(%esp),%eax
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fstpt (%eax)
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ret $4
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/*
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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*/
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ENTRY(syst_floatx80_rem)
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fldt 20(%esp)
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fldt 8(%esp)
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floatx80_rem_loop:
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fprem1
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fnstsw %ax
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btw $10,%ax
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jc floatx80_rem_loop
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movl 4(%esp),%eax
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fstpt (%eax)
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fstp %st(0)
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ret $4
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/*
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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*/
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ENTRY(syst_floatx80_sqrt)
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fldt 8(%esp)
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fsqrt
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movl 4(%esp),%eax
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fstpt (%eax)
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ret $4
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/*
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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*/
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ENTRY(syst_floatx80_eq)
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fldt 16(%esp)
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fldt 4(%esp)
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fucompp
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fnstsw %ax
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andw $17664,%ax
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cmpw $16384,%ax
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seteb %al
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movzb %al,%eax
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ret
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/*
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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*/
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ENTRY(syst_floatx80_le)
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fldt 4(%esp)
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fldt 16(%esp)
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fcompp
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fnstsw %ax
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notl %eax
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shrl $8,%eax
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andl $1,%eax
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ret
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/*
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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*/
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ENTRY(syst_floatx80_lt)
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fldt 4(%esp)
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fldt 16(%esp)
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fcompp
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fnstsw %ax
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andw $17664,%ax
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setzb %al
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movzb %al,%eax
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ret
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/*
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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*/
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ENTRY(syst_floatx80_eq_signaling)
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fldt 16(%esp)
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fldt 4(%esp)
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fcompp
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fnstsw %ax
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andw $17664,%ax
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cmpw $16384,%ax
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seteb %al
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movzb %al,%eax
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ret
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/*
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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*/
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ENTRY(syst_floatx80_le_quiet)
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fldt 4(%esp)
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fldt 16(%esp)
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fucompp
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fnstsw %ax
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notl %eax
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shrl $8,%eax
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andl $1,%eax
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ret
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/*
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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*/
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ENTRY(syst_floatx80_lt_quiet)
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fldt 4(%esp)
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fldt 16(%esp)
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fucompp
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fnstsw %ax
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andw $17664,%ax
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setzb %al
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movzb %al,%eax
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ret
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/*
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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*/
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ENTRY(syst_floatx80_to_int32_round_to_zero)
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pushl %ebp
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movl %esp,%ebp
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subl $12,%esp
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fldt 8(%ebp)
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fnstcw -4(%ebp)
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movl -4(%ebp),%edx
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movb $12,%dh
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movl %edx,-12(%ebp)
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fldcw -12(%ebp)
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fistpl -12(%ebp)
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movl -12(%ebp),%eax
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fldcw -4(%ebp)
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leave
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ret
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/*
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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*/
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ENTRY(syst_floatx80_to_int64_round_to_zero)
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pushl %ebp
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movl %esp,%ebp
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subl $12,%esp
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fldt 8(%ebp)
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fnstcw -4(%ebp)
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movl -4(%ebp),%ecx
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movb $12,%ch
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movl %ecx,-12(%ebp)
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fldcw -12(%ebp)
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fistpq -12(%ebp)
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movl -12(%ebp),%eax
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movl -8(%ebp),%edx
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fldcw -4(%ebp)
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leave
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ret
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