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dnl AMD64 mpn_addmul_2 -- Multiply an n-limb vector with a 2-limb vector and
dnl add the result to a third limb vector.
dnl Copyright 2008, 2011 Free Software Foundation, Inc.
dnl This file is part of the GNU MP Library.
dnl The GNU MP Library is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU Lesser General Public License as published
dnl by the Free Software Foundation; either version 3 of the License, or (at
dnl your option) any later version.
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 Lesser General Public
dnl License for more details.
dnl You should have received a copy of the GNU Lesser General Public License
dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/.
include(`../config.m4')
C cycles/limb
C AMD K8,K9 2.375
C AMD K10 2.375
C Intel P4 15-16
C Intel core2 4.45
C Intel NHM 4.32
C Intel SBR 3.4
C Intel atom ?
C VIA nano 4.4
C This code is the result of running a code generation and optimization tool
C suite written by David Harvey and Torbjorn Granlund.
C TODO
C * Tune feed-in and wind-down code.
C INPUT PARAMETERS
define(`rp', `%rdi')
define(`up', `%rsi')
define(`n_param',`%rdx')
define(`vp', `%rcx')
define(`v0', `%r8')
define(`v1', `%r9')
define(`w0', `%rbx')
define(`w1', `%rcx')
define(`w2', `%rbp')
define(`w3', `%r10')
define(`n', `%r11')
TEXT
ALIGN(16)
ASM_START()
PROLOGUE(mpn_addmul_2)
mov n_param, n
push %rbx
push %rbp
mov 0(vp), v0
mov 8(vp), v1
mov R32(n_param), R32(%rbx)
mov (up), %rax
lea -8(up,n_param,8), up
lea -8(rp,n_param,8), rp
mul v0
neg n
and $3, R32(%rbx)
jz L(b0)
cmp $2, R32(%rbx)
jc L(b1)
jz L(b2)
L(b3): mov %rax, w1
mov %rdx, w2
xor R32(w3), R32(w3)
mov 8(up,n,8), %rax
dec n
jmp L(lo3)
L(b2): mov %rax, w2
mov 8(up,n,8), %rax
mov %rdx, w3
xor R32(w0), R32(w0)
add $-2, n
jmp L(lo2)
L(b1): mov %rax, w3
mov 8(up,n,8), %rax
mov %rdx, w0
xor R32(w1), R32(w1)
inc n
jmp L(lo1)
L(b0): mov $0, R32(w3)
mov %rax, w0
mov 8(up,n,8), %rax
mov %rdx, w1
xor R32(w2), R32(w2)
jmp L(lo0)
ALIGN(32)
L(top): mov $0, R32(w1)
mul v0
add %rax, w3
mov (up,n,8), %rax
adc %rdx, w0
adc $0, R32(w1)
L(lo1): mul v1
add w3, (rp,n,8)
mov $0, R32(w3)
adc %rax, w0
mov $0, R32(w2)
mov 8(up,n,8), %rax
adc %rdx, w1
mul v0
add %rax, w0
mov 8(up,n,8), %rax
adc %rdx, w1
adc $0, R32(w2)
L(lo0): mul v1
add w0, 8(rp,n,8)
adc %rax, w1
adc %rdx, w2
mov 16(up,n,8), %rax
mul v0
add %rax, w1
adc %rdx, w2
adc $0, R32(w3)
mov 16(up,n,8), %rax
L(lo3): mul v1
add w1, 16(rp,n,8)
adc %rax, w2
adc %rdx, w3
xor R32(w0), R32(w0)
mov 24(up,n,8), %rax
mul v0
add %rax, w2
mov 24(up,n,8), %rax
adc %rdx, w3
adc $0, R32(w0)
L(lo2): mul v1
add w2, 24(rp,n,8)
adc %rax, w3
adc %rdx, w0
mov 32(up,n,8), %rax
add $4, n
js L(top)
L(end): xor R32(w1), R32(w1)
mul v0
add %rax, w3
mov (up), %rax
adc %rdx, w0
adc R32(w1), R32(w1)
mul v1
add w3, (rp)
adc %rax, w0
adc %rdx, w1
mov w0, 8(rp)
mov w1, %rax
pop %rbp
pop %rbx
ret
EPILOGUE()
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