dnl AMD64 mpn_mul_1 optimised for AMD bobcat.
dnl Copyright 2003-2005, 2007, 2008, 2011, 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 cycles/limb
C AMD K8,K9 4.5
C AMD K10 4.5
C AMD bd1 4.62
C AMD bobcat 5
C Intel P4 14
C Intel core2 4.5
C Intel NHM 4.23
C Intel SBR 3.0
C Intel atom 21
C VIA nano 4.94
C The loop of this code is the result of running a code generation and
C optimisation tool suite written by David Harvey and Torbjorn Granlund.
ABI_SUPPORT(DOS64)
ABI_SUPPORT(STD64)
C Standard parameters
define(`rp', `%rdi')
define(`up', `%rsi')
define(`n_param', `%rdx')
define(`v0', `%rcx')
define(`cy', `%r8')
C Standard allocations
define(`n', `%rbx')
define(`w0', `%r8')
define(`w1', `%r9')
define(`w2', `%r10')
define(`w3', `%r11')
C DOS64 parameters
IFDOS(` define(`rp', `%rcx') ') dnl
IFDOS(` define(`up', `%rsi') ') dnl
IFDOS(` define(`n_param', `%r8') ') dnl
IFDOS(` define(`v0', `%r9') ') dnl
IFDOS(` define(`cy', `56(%rsp)')') dnl
C DOS64 allocations
IFDOS(` define(`n', `%rbx') ') dnl
IFDOS(` define(`w0', `%r8') ') dnl
IFDOS(` define(`w1', `%rdi') ') dnl
IFDOS(` define(`w2', `%r10') ') dnl
IFDOS(` define(`w3', `%r11') ') dnl
ASM_START()
TEXT
ALIGN(16)
PROLOGUE(mpn_mul_1c)
IFDOS(` push %rsi ')
IFDOS(` push %rdi ')
IFDOS(` mov %rdx, %rsi ')
mov cy, w2
jmp L(com)
EPILOGUE()
PROLOGUE(mpn_mul_1)
IFDOS(` push %rsi ')
IFDOS(` push %rdi ')
IFDOS(` mov %rdx, %rsi ')
xor w2, w2
L(com): push %rbx
mov (up), %rax
lea -16(rp,n_param,8), rp
lea -16(up,n_param,8), up
mov n_param, n
and $3, R32(n_param)
jz L(b0)
cmp $2, R32(n_param)
ja L(b3)
jz L(b2)
L(b1): mul v0
cmp $1, n
jz L(n1)
neg n
add $3, n
add %rax, w2
mov %rdx, w3
jmp L(L1)
L(n1): add %rax, w2
mov %rdx, %rax
mov w2, 8(rp)
adc $0, %rax
pop %rbx
IFDOS(` pop %rdi ')
IFDOS(` pop %rsi ')
ret
L(b3): mul v0
neg n
inc n
add %rax, w2
mov %rdx, w3
jmp L(L3)
L(b0): mul v0
mov %rax, w0
mov %rdx, w1
neg n
add $2, n
add w2, w0
jmp L(L0)
L(b2): mul v0
mov %rax, w0
mov %rdx, w1
neg n
add w2, w0
jmp L(L2)
ALIGN(16)
L(top): mov w0, -16(rp,n,8)
add w1, w2
L(L1): adc $0, w3
mov 0(up,n,8), %rax
mul v0
mov %rax, w0
mov %rdx, w1
mov w2, -8(rp,n,8)
add w3, w0
L(L0): adc $0, w1
mov 8(up,n,8), %rax
mul v0
mov %rax, w2
mov %rdx, w3
mov w0, 0(rp,n,8)
add w1, w2
L(L3): adc $0, w3
mov 16(up,n,8), %rax
mul v0
mov %rax, w0
mov %rdx, w1
mov w2, 8(rp,n,8)
add w3, w0
L(L2): adc $0, w1
mov 24(up,n,8), %rax
mul v0
mov %rax, w2
mov %rdx, w3
add $4, n
js L(top)
L(end): mov w0, (rp)
add w1, w2
adc $0, w3
mov w2, 8(rp)
mov w3, %rax
pop %rbx
IFDOS(` pop %rdi ')
IFDOS(` pop %rsi ')
ret
EPILOGUE()