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dnl AMD64 mpn_mul_1 optimised for Intel Atom.
dnl Copyright 2003-2005, 2007, 2008, 2012, 2013 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 3.03
C AMD K10 3.03
C AMD bull 4.74
C AMD pile 4.56
C AMD steam
C AMD excavator
C AMD bobcat 5.56 6.04
C AMD jaguar 5.55 5.84
C Intel P4 13.05
C Intel core2 4.03
C Intel NHM 3.80
C Intel SBR 2.75
C Intel IBR 2.69
C Intel HWL 2.50
C Intel BWL 2.55
C Intel SKL 2.57
C Intel atom 17.3
C Intel SLM 14.7
C VIA nano
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.
define(`rp', `%rdi') C rcx
define(`up', `%rsi') C rdx
define(`n_param', `%rdx') C r8
define(`v0', `%rcx') C r9
define(`n', `%r11')
ABI_SUPPORT(DOS64)
ABI_SUPPORT(STD64)
ASM_START()
TEXT
ALIGN(16)
PROLOGUE(mpn_mul_1)
FUNC_ENTRY(4)
xor %r8, %r8
L(com): mov (up), %rax
lea -16(up,n_param,8), up
lea -8(rp,n_param,8), rp
test $1, R8(n_param)
jnz L(bx1)
L(bx0): mov %r8, %r9
test $2, R8(n_param)
jnz L(b10)
L(b00): mov $2, R32(n)
sub n_param, n
jmp L(lo0)
L(bx1): test $2, R8(n_param)
jnz L(b11)
L(b01): mov $3, R32(n)
sub n_param, n
mul v0
cmp $2, n
jnz L(lo1)
jmp L(cj1)
L(b11): mov $1, R32(n)
sub n_param, n
jmp L(lo3)
L(b10): xor R32(n), R32(n)
sub n_param, n
jmp L(lo2)
L(top): mul v0
mov %r9, -24(rp,n,8)
L(lo1): xor %r9d, %r9d
add %rax, %r8
mov (up,n,8), %rax
adc %rdx, %r9
mov %r8, -16(rp,n,8)
L(lo0): xor %r8d, %r8d
mul v0
add %rax, %r9
mov 8(up,n,8), %rax
adc %rdx, %r8
mov %r9, -8(rp,n,8)
L(lo3): xor %r9d, %r9d
mul v0
add %rax, %r8
mov 16(up,n,8), %rax
adc %rdx, %r9
mov %r8, (rp,n,8)
L(lo2): xor %r8d, %r8d
mul v0
add %rax, %r9
mov 24(up,n,8), %rax
adc %rdx, %r8
add $4, n
js L(top)
L(end): mul v0
mov %r9, -8(rp)
L(cj1): add %rax, %r8
mov $0, R32(%rax)
adc %rdx, %rax
mov %r8, (rp)
FUNC_EXIT()
ret
EPILOGUE()
PROLOGUE(mpn_mul_1c)
FUNC_ENTRY(4)
IFDOS(` mov 56(%rsp), %r8 ')
jmp L(com)
EPILOGUE()
ASM_END()
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