1# VAX mpn_rshift -- right shift.
2
3# Copyright 1999, 2000, 2001 Free Software Foundation, Inc.
4
5# This file is part of the GNU MP Library.
6
7# The GNU MP Library is free software; you can redistribute it and/or modify
8# it under the terms of the GNU Lesser General Public License as published by
9# the Free Software Foundation; either version 3 of the License, or (at your
10# option) any later version.
11
12# The GNU MP Library is distributed in the hope that it will be useful, but
13# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
15# License for more details.
16
17# You should have received a copy of the GNU Lesser General Public License
18# along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.
19
20
21# INPUT PARAMETERS
22# rptr		(sp + 4)
23# sptr		(sp + 8)
24# size		(sp + 12)
25# cnt		(sp + 16)
26# r0=retval r1=size r2,r3=itmp r4,r5=otmp	call-used registers
27# r6=sptr r7=rptr r8=cnt r9 r10 r11		call-saved registers
28
29.text
30	.align 1
31.globl ___gmpn_rshift
32___gmpn_rshift:
33	.word	0x1c0
34	movl	4(ap),r7
35	movl	8(ap),r6
36	movl	12(ap),r1
37	movl	16(ap),r8
38
39	movl	(r6)+,r2
40	subl3	r8,$32,r8
41	ashl	r8,r2,r0
42	decl	r1
43	jeql	Lend
44
45Loop:	movl	(r6)+,r3
46	ashq	r8,r2,r4
47	movl	r5,(r7)+
48	movl	r3,r2
49	sobgtr	r1,Loop
50
51Lend:	clrl	r3
52	ashq	r8,r2,r4
53	movl	r5,(r7)
54	ret
55