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120 lines
2.6 KiB
ArmAsm
120 lines
2.6 KiB
ArmAsm
/* SuperSPARC __udiv_qrnnd division support, used from longlong.h.
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* This is for SuperSPARC only, to compensate for its
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* semi-functional udiv instruction.
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*
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* Copyright (C) 1993, 1994, 1996, 1998,
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* 2001 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*
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* Note: This code is heavily based on the GNU MP Library.
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* Actually it's the same code with only minor changes in the
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* way the data is stored; this is to support the abstraction
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* of an optional secure memory allocation which may be used
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* to avoid revealing of sensitive data due to paging etc.
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* The GNU MP Library itself is published under the LGPL;
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* however I decided to publish this code under the plain GPL.
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*/
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! INPUT PARAMETERS
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! rem_ptr i0
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! n1 i1
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! n0 i2
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! d i3
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#include "sysdep.h"
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#undef ret /* Kludge for glibc */
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.text
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.align 8
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LC0: .double 0r4294967296
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LC1: .double 0r2147483648
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.align 4
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.global C_SYMBOL_NAME(__udiv_qrnnd)
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C_SYMBOL_NAME(__udiv_qrnnd):
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!#PROLOGUE# 0
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save %sp,-104,%sp
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!#PROLOGUE# 1
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st %i1,[%fp-8]
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ld [%fp-8],%f10
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sethi %hi(LC0),%o7
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fitod %f10,%f4
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ldd [%o7+%lo(LC0)],%f8
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cmp %i1,0
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bge L248
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mov %i0,%i5
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faddd %f4,%f8,%f4
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L248:
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st %i2,[%fp-8]
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ld [%fp-8],%f10
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fmuld %f4,%f8,%f6
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cmp %i2,0
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bge L249
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fitod %f10,%f2
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faddd %f2,%f8,%f2
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L249:
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st %i3,[%fp-8]
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faddd %f6,%f2,%f2
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ld [%fp-8],%f10
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cmp %i3,0
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bge L250
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fitod %f10,%f4
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faddd %f4,%f8,%f4
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L250:
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fdivd %f2,%f4,%f2
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sethi %hi(LC1),%o7
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ldd [%o7+%lo(LC1)],%f4
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fcmped %f2,%f4
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nop
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fbge,a L251
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fsubd %f2,%f4,%f2
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fdtoi %f2,%f2
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st %f2,[%fp-8]
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b L252
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ld [%fp-8],%i4
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L251:
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fdtoi %f2,%f2
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st %f2,[%fp-8]
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ld [%fp-8],%i4
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sethi %hi(-2147483648),%g2
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xor %i4,%g2,%i4
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L252:
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umul %i3,%i4,%g3
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rd %y,%i0
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subcc %i2,%g3,%o7
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subxcc %i1,%i0,%g0
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be L253
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cmp %o7,%i3
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add %i4,-1,%i0
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add %o7,%i3,%o7
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st %o7,[%i5]
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ret
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restore
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L253:
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blu L246
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mov %i4,%i0
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add %i4,1,%i0
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sub %o7,%i3,%o7
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L246:
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st %o7,[%i5]
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ret
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restore
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