1 | /* Multiply a limb vector by a single limb, for PowerPC. |
2 | Copyright (C) 1993-2024 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <sysdep.h> |
20 | |
21 | /* mp_limb_t mpn_addmul_1 (mp_ptr res_ptr, mp_srcptr s1_ptr, |
22 | mp_size_t s1_size, mp_limb_t s2_limb) |
23 | Calculate res+s1*s2 and put result back in res; return carry. */ |
24 | ENTRY (__mpn_addmul_1) |
25 | mtctr r5 |
26 | |
27 | lwz r0,0(r4) |
28 | mullw r7,r0,r6 |
29 | mulhwu r10,r0,r6 |
30 | lwz r9,0(r3) |
31 | addc r8,r7,r9 |
32 | addi r3,r3,-4 /* adjust res_ptr */ |
33 | bdz L(1) |
34 | |
35 | L(0): lwzu r0,4(r4) |
36 | stwu r8,4(r3) |
37 | mullw r8,r0,r6 |
38 | adde r7,r8,r10 |
39 | mulhwu r10,r0,r6 |
40 | lwz r9,4(r3) |
41 | addze r10,r10 |
42 | addc r8,r7,r9 |
43 | bdnz L(0) |
44 | |
45 | L(1): stw r8,4(r3) |
46 | addze r3,r10 |
47 | blr |
48 | END (__mpn_addmul_1) |
49 | |