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. */
24ENTRY (__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
35L(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
45L(1): stw r8,4(r3)
46 addze r3,r10
47 blr
48END (__mpn_addmul_1)
49

source code of glibc/sysdeps/powerpc/powerpc32/addmul_1.S