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/* Multiply a limb vector by a limb, for PowerPC.
Copyright (C) 1993-1995, 1997, 1999, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <bp-sym.h>
#include <bp-asm.h>
/* mp_limb_t mpn_mul_1 (mp_ptr res_ptr, mp_srcptr s1_ptr,
mp_size_t s1_size, mp_limb_t s2_limb)
Calculate s1*s2 and put result in res_ptr; return carry. */
ENTRY (BP_SYM (__mpn_mul_1))
#if __BOUNDED_POINTERS__
slwi r10,r5,2 /* convert limbs to bytes */
CHECK_BOUNDS_BOTH_WIDE (r3, r8, r9, r10)
CHECK_BOUNDS_BOTH_WIDE (r4, r8, r9, r10)
#endif
mtctr r5
lwz r0,0(r4)
mullw r7,r0,r6
mulhwu r10,r0,r6
addi r3,r3,-4 # adjust res_ptr
addic r5,r5,0 # clear cy with dummy insn
bdz L(1)
L(0): lwzu r0,4(r4)
stwu r7,4(r3)
mullw r8,r0,r6
adde r7,r8,r10
mulhwu r10,r0,r6
bdnz L(0)
L(1): stw r7,4(r3)
addze r3,r10
blr
END (BP_SYM (__mpn_mul_1))
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