Markus F.X.J. Oberhumer
b8e698bde3
FIXME: ctojr32 needs CPU 486 because it uses bswap. committer: mfx <mfx> 1075806034 +0000
59 lines
1.7 KiB
NASM
59 lines
1.7 KiB
NASM
; upx_itoa.asm -- decimal print; smaller than gcc, and no relocations
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;
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; This file is part of the UPX executable compressor.
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;
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; Copyright (C) 2002-2004 John F. Reiser
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; All Rights Reserved.
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;
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; UPX and the UCL library are free software; you can redistribute them
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; and/or modify them under the terms of the GNU General Public License as
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; published by the Free Software Foundation; either version 2 of
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; the License, or (at your option) any later version.
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;
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; This program 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; see the file COPYING.
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; If not, write to the Free Software Foundation, Inc.,
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; 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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;
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; John F. Reiser
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; <jreiser@users.sourceforge.net>
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;
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BITS 32
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SECTION .text
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CPU 386
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GLOBAL upx_itoa
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upx_itoa: ; char *upx_itoa(eax= unsigned v, edx= char *buf) /* 0<=(int)v */
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push edi ; save register
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mov edi,edx ; output ptr
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push byte 10
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cld
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pop ecx ; radix
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call recur
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mov [edi],ah ; NUL terminate
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xchg eax,edi ; eax= continuation point
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pop edi ; restore register
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ret
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recur:
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cdq ; zero extend eax into edx [use "sub edx,edx" if eax < 0 ]
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div ecx ; eax=quo, edx=rem; flags are undefined
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push edx
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test eax,eax
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je quo0
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call recur
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quo0:
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pop eax ; remainder
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add al, byte '0'
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stosb
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ret
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; vi:ts=8:et:nowrap
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