1 /* S390 __mpn_addmul_1 -- Multiply a limb vector with a limb and add
2 the result to a second limb vector.
3 Copyright (C) 2000-2024 Free Software Foundation, Inc.
4 This file is part of the GNU MP Library.
6 The GNU MP Library is free software; you can redistribute it and/or modify
7 it under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or (at your
9 option) any later version.
11 The GNU MP Library is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
14 License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with the GNU MP Library; see the file COPYING.LIB. If not,
18 see <https://www.gnu.org/licenses/>. */
29 #include "asm-syntax.h"
35 slr %r6,%r6 # cy_limb = 0
36 .L0: icm %r1,15,0(%r3) # get s1_ptr[i]
37 mr %r0,%r5 # umul_ppmm(prod_high,prod_low,s1_ptr[j],s2_limb)
43 .L2: alr %r1,%r6 # prod_low += cy_limb
44 lr %r6,%r0 # cy_limb = prod_high
46 ahi %r6,1 # + (prod_low < cy_limb)
47 .L3: al %r1,0(%r2) # prod_low += res_ptr[i]
54 lr %r2,%r6 # return cy_limb