1dnl  MIPS32 mpn_lshift -- Left shift.
2
3dnl  Copyright 1995, 2000, 2002 Free Software Foundation, Inc.
4
5dnl  This file is part of the GNU MP Library.
6dnl
7dnl  The GNU MP Library is free software; you can redistribute it and/or modify
8dnl  it under the terms of either:
9dnl
10dnl    * the GNU Lesser General Public License as published by the Free
11dnl      Software Foundation; either version 3 of the License, or (at your
12dnl      option) any later version.
13dnl
14dnl  or
15dnl
16dnl    * the GNU General Public License as published by the Free Software
17dnl      Foundation; either version 2 of the License, or (at your option) any
18dnl      later version.
19dnl
20dnl  or both in parallel, as here.
21dnl
22dnl  The GNU MP Library is distributed in the hope that it will be useful, but
23dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
24dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
25dnl  for more details.
26dnl
27dnl  You should have received copies of the GNU General Public License and the
28dnl  GNU Lesser General Public License along with the GNU MP Library.  If not,
29dnl  see https://www.gnu.org/licenses/.
30
31include(`../config.m4')
32
33C INPUT PARAMETERS
34C res_ptr	$4
35C src_ptr	$5
36C size		$6
37C cnt		$7
38
39ASM_START()
40PROLOGUE(mpn_lshift)
41	sll	$2,$6,2
42	addu	$5,$5,$2	C make r5 point at end of src
43	lw	$10,-4($5)	C load first limb
44	subu	$13,$0,$7
45	addu	$4,$4,$2	C make r4 point at end of res
46	addiu	$6,$6,-1
47	and	$9,$6,4-1	C number of limbs in first loop
48	beq	$9,$0,.L0	C if multiple of 4 limbs, skip first loop
49	 srl	$2,$10,$13	C compute function result
50
51	subu	$6,$6,$9
52
53.Loop0:	lw	$3,-8($5)
54	addiu	$4,$4,-4
55	addiu	$5,$5,-4
56	addiu	$9,$9,-1
57	sll	$11,$10,$7
58	srl	$12,$3,$13
59	move	$10,$3
60	or	$8,$11,$12
61	bne	$9,$0,.Loop0
62	 sw	$8,0($4)
63
64.L0:	beq	$6,$0,.Lend
65	 nop
66
67.Loop:	lw	$3,-8($5)
68	addiu	$4,$4,-16
69	addiu	$6,$6,-4
70	sll	$11,$10,$7
71	srl	$12,$3,$13
72
73	lw	$10,-12($5)
74	sll	$14,$3,$7
75	or	$8,$11,$12
76	sw	$8,12($4)
77	srl	$9,$10,$13
78
79	lw	$3,-16($5)
80	sll	$11,$10,$7
81	or	$8,$14,$9
82	sw	$8,8($4)
83	srl	$12,$3,$13
84
85	lw	$10,-20($5)
86	sll	$14,$3,$7
87	or	$8,$11,$12
88	sw	$8,4($4)
89	srl	$9,$10,$13
90
91	addiu	$5,$5,-16
92	or	$8,$14,$9
93	bgtz	$6,.Loop
94	 sw	$8,0($4)
95
96.Lend:	sll	$8,$10,$7
97	j	$31
98	sw	$8,-4($4)
99EPILOGUE(mpn_lshift)
100