dnl Copyright 1999-2001, 2003-2006, 2010-2012 Free Software Foundation, Inc.
dnl This file is part of the GNU MP Library.
dnl
dnl The GNU MP Library is free software; you can redistribute it and/or modify
dnl it under the terms of either:
dnl
dnl * the GNU Lesser General Public License as published by the Free
dnl Software Foundation; either version 3 of the License, or (at your
dnl option) any later version.
dnl
dnl or
dnl
dnl * the GNU General Public License as published by the Free Software
dnl Foundation; either version 2 of the License, or (at your option) any
dnl later version.
dnl
dnl or both in parallel, as here.
dnl
dnl The GNU MP Library is distributed in the hope that it will be useful, but
dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
dnl for more details.
dnl
dnl You should have received copies of the GNU General Public License and the
dnl GNU Lesser General Public License along with the GNU MP Library. If not,
dnl see https://www.gnu.org/licenses/.
include(`../config.m4')
C mpn_addmul_1 mpn_submul_1
C cycles/limb cycles/limb
C POWER3/PPC630 6-18 6-18
C POWER4/PPC970 8 8.3
C POWER5 8 8.25
C POWER6 16.25 16.75
C POWER7 3.77 4.9
C TODO
C * Try to reduce the number of needed live registers
C * Add support for _1c entry points
ifdef(`OPERATION_addmul_1',`
define(ADDSUBC, adde)
define(ADDSUB, addc)
define(func, mpn_addmul_1)
define(func_nc, mpn_addmul_1c) C FIXME: not really supported
define(SM, `') ') ifdef(`OPERATION_submul_1',`
define(ADDSUBC, subfe)
define(ADDSUB, subfc)
define(func, mpn_submul_1)
define(func_nc, mpn_submul_1c) C FIXME: not really supported
define(SM, `$1') ')
MULFUNC_PROLOGUE(mpn_addmul_1 mpn_submul_1)
ASM_START()
PROLOGUE(func)
std r31, -8(r1)
rldicl. r0, n, 0,62 C r0 = n & 3, set cr0
std r30, -16(r1)
cmpdi cr6, r0, 2
std r29, -24(r1)
addi n, n, 3 C compute count...
std r28, -32(r1)
srdi n, n, 2 C ...for ctr
std r27, -40(r1)
mtctr n C copy count into ctr
beq cr0, L(b00)
blt cr6, L(b01)
beq cr6, L(b10)
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