1 /* Multiply a limb vector by a single limb, for PowerPC.
2 Copyright (C) 1993-1995, 1997, 1999, 2000 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
24 /* mp_limb_t mpn_submul_1 (mp_ptr res_ptr, mp_srcptr s1_ptr,
25 mp_size_t s1_size, mp_limb_t s2_limb)
26 Calculate res-s1*s2 and put result back in res; return carry. */
28 ENTRY (BP_SYM (__mpn_submul_1))
29 #if __BOUNDED_POINTERS__
30 slwi r10,r5,2 /* convert limbs to bytes */
31 CHECK_BOUNDS_BOTH_WIDE (r3, r8, r9, r10)
32 CHECK_BOUNDS_BOTH_WIDE (r4, r8, r9, r10)
41 addc r7,r7,r8 # invert cy (r7 is junk)
42 addi r3,r3,-4 # adjust res_ptr
53 addc r7,r7,r8 # invert cy (r7 is junk)
59 END (BP_SYM (__mpn_submul_1))