1 dnl PowerPC-64 mpn_submul_1 -- Multiply a limb vector with a limb and subtract
2 dnl the result from a second limb vector.
4 dnl Copyright 1999, 2000, 2001, 2003, 2005 Free Software Foundation, Inc.
6 dnl This file is part of the GNU MP Library.
8 dnl The GNU MP Library is free software; you can redistribute it and/or modify
9 dnl it under the terms of the GNU Lesser General Public License as published
10 dnl by the Free Software Foundation; either version 3 of the License, or (at
11 dnl your option) any later version.
13 dnl The GNU MP Library is distributed in the hope that it will be useful, but
14 dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
16 dnl License for more details.
18 dnl You should have received a copy of the GNU Lesser General Public License
19 dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/.
21 include(`../config.m4')
34 PROLOGUE(mpn_submul_1)
36 ifdef(`BROKEN_LONGLONG_PARAM',
37 ` rldimi r8, r7, 32,0 C assemble vlimb from separate 32-bit arguments
40 rldimi r7, r6, 32,0 C assemble vlimb from separate 32-bit arguments
43 li r7, 0 C cy_limb = 0
51 adde r12, r9, r7 C add old high limb and new low limb
54 adde r5, r5, r11 C add high limb parts, set cy
61 subfe r5, r5, r11 C subtract high limb parts, set cy
63 subfe r11, r11, r11 C invert ...
64 addic r11, r11, 1 C ... carry