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Diffstat (limited to 'linden/indra/libgcrypt/libgcrypt-1.2.2/mpi/power/mpih-add1.S')
-rwxr-xr-x | linden/indra/libgcrypt/libgcrypt-1.2.2/mpi/power/mpih-add1.S | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/linden/indra/libgcrypt/libgcrypt-1.2.2/mpi/power/mpih-add1.S b/linden/indra/libgcrypt/libgcrypt-1.2.2/mpi/power/mpih-add1.S new file mode 100755 index 0000000..4214520 --- /dev/null +++ b/linden/indra/libgcrypt/libgcrypt-1.2.2/mpi/power/mpih-add1.S | |||
@@ -0,0 +1,87 @@ | |||
1 | /* IBM POWER add_n -- Add two limb vectors of equal, non-zero length. | ||
2 | * | ||
3 | * Copyright (C) 1992, 1994, 1996, 1999, | ||
4 | * 2002 Free Software Foundation, Inc. | ||
5 | * | ||
6 | * This file is part of Libgcrypt. | ||
7 | * | ||
8 | * Libgcrypt is free software; you can redistribute it and/or modify | ||
9 | * it under the terms of the GNU Lesser General Public License as | ||
10 | * published by the Free Software Foundation; either version 2.1 of | ||
11 | * the License, or (at your option) any later version. | ||
12 | * | ||
13 | * Libgcrypt is distributed in the hope that it will be useful, | ||
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
16 | * GNU Lesser General Public License for more details. | ||
17 | * | ||
18 | * You should have received a copy of the GNU Lesser General Public | ||
19 | * License along with this program; if not, write to the Free Software | ||
20 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA | ||
21 | */ | ||
22 | |||
23 | #include "sysdep.h" | ||
24 | #include "asm-syntax.h" | ||
25 | |||
26 | /* | ||
27 | # INPUT PARAMETERS | ||
28 | # res_ptr r3 | ||
29 | # s1_ptr r4 | ||
30 | # s2_ptr r5 | ||
31 | # size r6 | ||
32 | */ | ||
33 | |||
34 | .toc | ||
35 | .extern _gcry_mpih_add_n[DS] | ||
36 | .extern ._gcry_mpih_add_n | ||
37 | .csect [PR] | ||
38 | .align 2 | ||
39 | .globl _gcry_mpih_add_n | ||
40 | .globl ._gcry_mpih_add_n | ||
41 | .csect _gcry_mpih_add_n[DS] | ||
42 | _gcry_mpih_add_n: | ||
43 | .long ._gcry_mpih_add_n, TOC[tc0], 0 | ||
44 | .csect [PR] | ||
45 | ._gcry_mpih_add_n: | ||
46 | andil. 10,6,1 # odd or even number of limbs? | ||
47 | l 8,0(4) # load least significant s1 limb | ||
48 | l 0,0(5) # load least significant s2 limb | ||
49 | cal 3,-4(3) # offset res_ptr, it's updated before it's used | ||
50 | sri 10,6,1 # count for unrolled loop | ||
51 | a 7,0,8 # add least significant limbs, set cy | ||
52 | mtctr 10 # copy count into CTR | ||
53 | beq 0,Leven # branch if even # of limbs (# of limbs >= 2) | ||
54 | |||
55 | # We have an odd # of limbs. Add the first limbs separately. | ||
56 | cmpi 1,10,0 # is count for unrolled loop zero? | ||
57 | bne 1,L1 # branch if not | ||
58 | st 7,4(3) | ||
59 | aze 3,10 # use the fact that r10 is zero... | ||
60 | br # return | ||
61 | |||
62 | # We added least significant limbs. Now reload the next limbs to enter loop. | ||
63 | L1: lu 8,4(4) # load s1 limb and update s1_ptr | ||
64 | lu 0,4(5) # load s2 limb and update s2_ptr | ||
65 | stu 7,4(3) | ||
66 | ae 7,0,8 # add limbs, set cy | ||
67 | Leven: lu 9,4(4) # load s1 limb and update s1_ptr | ||
68 | lu 10,4(5) # load s2 limb and update s2_ptr | ||
69 | bdz Lend # If done, skip loop | ||
70 | |||
71 | Loop: lu 8,4(4) # load s1 limb and update s1_ptr | ||
72 | lu 0,4(5) # load s2 limb and update s2_ptr | ||
73 | ae 11,9,10 # add previous limbs with cy, set cy | ||
74 | stu 7,4(3) # | ||
75 | lu 9,4(4) # load s1 limb and update s1_ptr | ||
76 | lu 10,4(5) # load s2 limb and update s2_ptr | ||
77 | ae 7,0,8 # add previous limbs with cy, set cy | ||
78 | stu 11,4(3) # | ||
79 | bdn Loop # decrement CTR and loop back | ||
80 | |||
81 | Lend: ae 11,9,10 # add limbs with cy, set cy | ||
82 | st 7,4(3) # | ||
83 | st 11,8(3) # | ||
84 | lil 3,0 # load cy into ... | ||
85 | aze 3,3 # ... return value register | ||
86 | br | ||
87 | |||