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dnl AMD64 mpn_add_err3_n, mpn_sub_err3_n
dnl Contributed by David Harvey.
dnl Copyright 2011 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 7.0
C AMD K10 ?
C Intel P4 ?
C Intel core2 ?
C Intel corei ?
C Intel atom ?
C VIA nano ?
C INPUT PARAMETERS
define(`rp', `%rdi')
define(`up', `%rsi')
define(`vp', `%rdx')
define(`ep', `%rcx')
define(`yp1', `%r8')
define(`yp2', `%r9')
define(`yp3_param', `8(%rsp)')
define(`n_param', `16(%rsp)')
define(`cy_param', `24(%rsp)')
define(`n', `%r10')
define(`yp3', `%rcx')
define(`t', `%rbx')
define(`e1l', `%rbp')
define(`e1h', `%r11')
define(`e2l', `%r12')
define(`e2h', `%r13')
define(`e3l', `%r14')
define(`e3h', `%r15')
ifdef(`OPERATION_add_err3_n', `
define(ADCSBB, adc)
define(func, mpn_add_err3_n)')
ifdef(`OPERATION_sub_err3_n', `
define(ADCSBB, sbb)
define(func, mpn_sub_err3_n)')
MULFUNC_PROLOGUE(mpn_add_err3_n mpn_sub_err3_n)
ASM_START()
TEXT
ALIGN(16)
PROLOGUE(func)
mov cy_param, %rax
mov n_param, n
push %rbx
push %rbp
push %r12
push %r13
push %r14
push %r15
push ep
mov 64(%rsp), yp3 C load from yp3_param
xor R32(e1l), R32(e1l)
xor R32(e1h), R32(e1h)
xor R32(e2l), R32(e2l)
xor R32(e2h), R32(e2h)
xor R32(e3l), R32(e3l)
xor R32(e3h), R32(e3h)
sub yp1, yp2
sub yp1, yp3
lea -8(yp1,n,8), yp1
lea (rp,n,8), rp
lea (up,n,8), up
lea (vp,n,8), vp
neg n
ALIGN(16)
L(top):
shr $1, %rax C restore carry
mov (up,n,8), %rax
ADCSBB (vp,n,8), %rax
mov %rax, (rp,n,8)
sbb %rax, %rax C save carry and generate mask
mov (yp1), t
and %rax, t
add t, e1l
adc $0, e1h
mov (yp1,yp2), t
and %rax, t
add t, e2l
adc $0, e2h
mov (yp1,yp3), t
and %rax, t
add t, e3l
adc $0, e3h
lea -8(yp1), yp1
inc n
jnz L(top)
L(end):
and $1, %eax
pop ep
mov e1l, (ep)
mov e1h, 8(ep)
mov e2l, 16(ep)
mov e2h, 24(ep)
mov e3l, 32(ep)
mov e3h, 40(ep)
pop %r15
pop %r14
pop %r13
pop %r12
pop %rbp
pop %rbx
ret
EPILOGUE()
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