EMILE/libunix/divsi3.S

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2005-11-08 02:04:54 +00:00
/*
*
* (c) 2004,2005 Laurent Vivier <LaurentVivier@wanadoo.fr>
*
* Some parts from libgcc routines for 68000 w/o floating-point hardware.
* Copyright (C) 1994, 1996, 1997, 1998 Free Software Foundation, Inc.
*
*/
.chip 68000
.align 2
.globl __divsi3
__divsi3:
movel %d2, %sp@-
moveq #1, %d2 /* sign of result stored in %d2 (=1 or =-1) */
movel %sp@(12), %d1 /* %d1 = divisor */
jpl __divsi3L1
negl %d1
negb %d2 /* change sign because divisor <0 */
__divsi3L1: movel %sp@(8), %d0 /* %d0 = dividend */
jpl __divsi3L2
negl %d0
negb %d2
__divsi3L2: movel %d1, %sp@-
movel %d0, %sp@-
bsr __udivsi3 /* divide abs(dividend) by abs(divisor) */
addql #8, %sp
tstb %d2
jpl __divsi3L3
negl %d0
__divsi3L3: movel %sp@+, %d2
rts