1! Sparc __mpn_lshift --
2!
3! Copyright (C) 1995-2021 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 2.1 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; see the file COPYING.LIB.  If not,
19! see <https://www.gnu.org/licenses/>.
20
21
22! INPUT PARAMETERS
23! RES_PTR	%o0
24! SRC_PTR	%o1
25! SIZE		%o2
26! CNT		%o3
27
28#include <sysdep.h>
29
30ENTRY(__mpn_lshift)
31	sll	%o2,2,%g1
32	add	%o1,%g1,%o1	! make %o1 point at end of src
33	ld	[%o1-4],%g2	! load first limb
34	sub	%g0,%o3,%o5	! negate shift count
35	add	%o0,%g1,%o0	! make %o0 point at end of res
36	add	%o2,-1,%o2
37	andcc	%o2,4-1,%g4	! number of limbs in first loop
38	srl	%g2,%o5,%g1	! compute function result
39	be	LOC(0)		! if multiple of 4 limbs, skip first loop
40	st	%g1,[%sp+80]
41
42	sub	%o2,%g4,%o2	! adjust count for main loop
43
44LOC(loop0):
45	ld	[%o1-8],%g3
46	add	%o0,-4,%o0
47	add	%o1,-4,%o1
48	addcc	%g4,-1,%g4
49	sll	%g2,%o3,%o4
50	srl	%g3,%o5,%g1
51	mov	%g3,%g2
52	or	%o4,%g1,%o4
53	bne	LOC(loop0)
54	 st	%o4,[%o0+0]
55
56LOC(0):	tst	%o2
57	be	LOC(end)
58	 nop
59
60LOC(loop):
61	ld	[%o1-8],%g3
62	add	%o0,-16,%o0
63	addcc	%o2,-4,%o2
64	sll	%g2,%o3,%o4
65	srl	%g3,%o5,%g1
66
67	ld	[%o1-12],%g2
68	sll	%g3,%o3,%g4
69	or	%o4,%g1,%o4
70	st	%o4,[%o0+12]
71	srl	%g2,%o5,%g1
72
73	ld	[%o1-16],%g3
74	sll	%g2,%o3,%o4
75	or	%g4,%g1,%g4
76	st	%g4,[%o0+8]
77	srl	%g3,%o5,%g1
78
79	ld	[%o1-20],%g2
80	sll	%g3,%o3,%g4
81	or	%o4,%g1,%o4
82	st	%o4,[%o0+4]
83	srl	%g2,%o5,%g1
84
85	add	%o1,-16,%o1
86	or	%g4,%g1,%g4
87	bne	LOC(loop)
88	 st	%g4,[%o0+0]
89
90LOC(end):
91	sll	%g2,%o3,%g2
92	st	%g2,[%o0-4]
93	retl
94	ld	[%sp+80],%o0
95
96END(__mpn_lshift)
97