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dnl PowerPC-64 mpn_addmul_1 and mpn_submul_1.
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
C INPUT PARAMETERS
define(`rp', `r3')
define(`up', `r4')
define(`n', `r5')
define(`vl', `r6')
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)
L(b11): ld r9, 0(up)
ld r28, 0(rp)
mulld r0, r9, r6
mulhdu r12, r9, r6
ADDSUB r0, r0, r28
std r0, 0(rp)
addi rp, rp, 8
ld r9, 8(up)
ld r27, 16(up)
addi up, up, 24
SM(` subfe r11, r11, r11 ')
b L(bot)
ALIGN(16)
L(b00): ld r9, 0(up)
ld r27, 8(up)
ld r28, 0(rp)
ld r29, 8(rp)
mulld r0, r9, r6
mulhdu r5, r9, r6
mulld r7, r27, r6
mulhdu r8, r27, r6
addc r7, r7, r5
addze r12, r8
ADDSUB r0, r0, r28
std r0, 0(rp)
ADDSUBC r7, r7, r29
std r7, 8(rp)
addi rp, rp, 16
ld r9, 16(up)
ld r27, 24(up)
addi up, up, 32
SM(` subfe r11, r11, r11 ')
b L(bot)
ALIGN(16)
L(b01): bdnz L(gt1)
ld r9, 0(up)
ld r11, 0(rp)
mulld r0, r9, r6
mulhdu r8, r9, r6
ADDSUB r0, r0, r11
std r0, 0(rp)
SM(` subfe r11, r11, r11 ')
SM(` addic r11, r11, 1 ')
addze r3, r8
blr
L(gt1): ld r9, 0(up)
ld r27, 8(up)
mulld r0, r9, r6
mulhdu r5, r9, r6
mulld r7, r27, r6
mulhdu r8, r27, r6
ld r9, 16(up)
ld r28, 0(rp)
ld r29, 8(rp)
ld r30, 16(rp)
mulld r11, r9, r6
mulhdu r10, r9, r6
addc r7, r7, r5
adde r11, r11, r8
addze r12, r10
ADDSUB r0, r0, r28
std r0, 0(rp)
ADDSUBC r7, r7, r29
std r7, 8(rp)
ADDSUBC r11, r11, r30
std r11, 16(rp)
addi rp, rp, 24
ld r9, 24(up)
ld r27, 32(up)
addi up, up, 40
SM(` subfe r11, r11, r11 ')
b L(bot)
L(b10): addic r0, r0, 0
li r12, 0 C cy_limb = 0
ld r9, 0(up)
ld r27, 8(up)
bdz L(end)
addi up, up, 16
ALIGN(16)
L(top): mulld r0, r9, r6
mulhdu r5, r9, r6 C 9
mulld r7, r27, r6
mulhdu r8, r27, r6 C 27
ld r9, 0(up)
ld r28, 0(rp)
ld r27, 8(up)
ld r29, 8(rp)
adde r0, r0, r12 C 0 12
adde r7, r7, r5 C 5 7
mulld r5, r9, r6
mulhdu r10, r9, r6 C 9
mulld r11, r27, r6
mulhdu r12, r27, r6 C 27
ld r9, 16(up)
ld r30, 16(rp)
ld r27, 24(up)
ld r31, 24(rp)
adde r5, r5, r8 C 8 5
adde r11, r11, r10 C 10 11
addze r12, r12 C 12
ADDSUB r0, r0, r28 C 0 28
std r0, 0(rp) C 0
ADDSUBC r7, r7, r29 C 7 29
std r7, 8(rp) C 7
ADDSUBC r5, r5, r30 C 5 30
std r5, 16(rp) C 5
ADDSUBC r11, r11, r31 C 11 31
std r11, 24(rp) C 11
addi up, up, 32
SM(` subfe r11, r11, r11 ')
addi rp, rp, 32
L(bot):
SM(` addic r11, r11, 1 ')
bdnz L(top)
L(end): mulld r0, r9, r6
mulhdu r5, r9, r6
mulld r7, r27, r6
mulhdu r8, r27, r6
ld r28, 0(rp)
ld r29, 8(rp)
adde r0, r0, r12
adde r7, r7, r5
addze r8, r8
ADDSUB r0, r0, r28
std r0, 0(rp)
ADDSUBC r7, r7, r29
std r7, 8(rp)
SM(` subfe r11, r11, r11 ')
SM(` addic r11, r11, 1 ')
addze r3, r8
ld r31, -8(r1)
ld r30, -16(r1)
ld r29, -24(r1)
ld r28, -32(r1)
ld r27, -40(r1)
blr
EPILOGUE()
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