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Diffstat (limited to 'linden/indra/libgcrypt/libgcrypt-1.2.2/mpi/power/mpih-rshift.S')
-rwxr-xr-x | linden/indra/libgcrypt/libgcrypt-1.2.2/mpi/power/mpih-rshift.S | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/linden/indra/libgcrypt/libgcrypt-1.2.2/mpi/power/mpih-rshift.S b/linden/indra/libgcrypt/libgcrypt-1.2.2/mpi/power/mpih-rshift.S new file mode 100755 index 0000000..0e85ae3 --- /dev/null +++ b/linden/indra/libgcrypt/libgcrypt-1.2.2/mpi/power/mpih-rshift.S | |||
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1 | /* IBM POWER rshift | ||
2 | * | ||
3 | * Copyright (C) 1992, 1994, 1999, 2002 Free Software Foundation, Inc. | ||
4 | * | ||
5 | * This file is part of Libgcrypt. | ||
6 | * | ||
7 | * Libgcrypt is free software; you can redistribute it and/or modify | ||
8 | * it under the terms of the GNU Lesser General Public License as | ||
9 | * published by the Free Software Foundation; either version 2.1 of | ||
10 | * the License, or (at your option) any later version. | ||
11 | * | ||
12 | * Libgcrypt is distributed in the hope that it will be useful, | ||
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
15 | * GNU Lesser General Public License for more details. | ||
16 | * | ||
17 | * You should have received a copy of the GNU Lesser General Public | ||
18 | * License along with this program; if not, write to the Free Software | ||
19 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA | ||
20 | */ | ||
21 | |||
22 | #include "sysdep.h" | ||
23 | #include "asm-syntax.h" | ||
24 | |||
25 | |||
26 | /* | ||
27 | # INPUT PARAMETERS | ||
28 | # res_ptr r3 | ||
29 | # s_ptr r4 | ||
30 | # size r5 | ||
31 | # cnt r6 | ||
32 | */ | ||
33 | |||
34 | .toc | ||
35 | .extern _gcry_mpih_rshift[DS] | ||
36 | .extern ._gcry_mpih_rshift | ||
37 | .csect [PR] | ||
38 | .align 2 | ||
39 | .globl _gcry_mpih_rshift | ||
40 | .globl ._gcry_mpih_rshift | ||
41 | .csect _gcry_mpih_rshift[DS] | ||
42 | _gcry_mpih_rshift: | ||
43 | .long ._gcry_mpih_rshift, TOC[tc0], 0 | ||
44 | .csect [PR] | ||
45 | ._gcry_mpih_rshift: | ||
46 | sfi 8,6,32 | ||
47 | mtctr 5 # put limb count in CTR loop register | ||
48 | l 0,0(4) # read least significant limb | ||
49 | ai 9,3,-4 # adjust res_ptr since it's offset in the stu:s | ||
50 | sle 3,0,8 # compute carry limb, and init MQ register | ||
51 | bdz Lend2 # if just one limb, skip loop | ||
52 | lu 0,4(4) # read 2:nd least significant limb | ||
53 | sleq 7,0,8 # compute least significant limb of result | ||
54 | bdz Lend # if just two limb, skip loop | ||
55 | Loop: lu 0,4(4) # load next higher limb | ||
56 | stu 7,4(9) # store previous result during read latency | ||
57 | sleq 7,0,8 # compute result limb | ||
58 | bdn Loop # loop back until CTR is zero | ||
59 | Lend: stu 7,4(9) # store 2:nd most significant limb | ||
60 | Lend2: sre 7,0,6 # compute most significant limb | ||
61 | st 7,4(9) # store it | ||
62 | br | ||
63 | |||
64 | |||