2011-07-13 05:48:02 -04:00
|
|
|
dnl mpn_half
|
|
|
|
|
|
|
|
|
|
dnl Copyright 2011 The Code Cavern
|
|
|
|
|
|
|
|
|
|
dnl This file is part of the MPIR Library.
|
|
|
|
|
|
|
|
|
|
dnl The MPIR 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 2.1 of the License, or (at
|
|
|
|
|
dnl your option) any later version.
|
|
|
|
|
|
|
|
|
|
dnl The MPIR 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 MPIR Library; see the file COPYING.LIB. If not, write
|
|
|
|
|
dnl to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
|
|
|
dnl Boston, MA 02110-1301, USA.
|
|
|
|
|
|
|
|
|
|
include(`../config.m4')
|
|
|
|
|
|
|
|
|
|
ASM_START()
|
|
|
|
|
PROLOGUE(mpn_half)
|
|
|
|
|
mov %rsi,%rax
|
|
|
|
|
lea -8(%rdi,%rsi,8),%rdi
|
|
|
|
|
shr $2,%rsi
|
|
|
|
|
and $3,%eax
|
|
|
|
|
jz t1
|
|
|
|
|
shrq $1,(%rdi)
|
|
|
|
|
lea -8(%rdi),%rdi
|
|
|
|
|
dec %rax
|
|
|
|
|
jz t1
|
|
|
|
|
rcrq $1,(%rdi)
|
|
|
|
|
lea -8(%rdi),%rdi
|
|
|
|
|
dec %rax
|
|
|
|
|
jz t1
|
|
|
|
|
rcrq $1,(%rdi)
|
|
|
|
|
lea -8(%rdi),%rdi
|
2011-07-13 08:54:47 -04:00
|
|
|
dec %rax
|
2011-07-13 05:48:02 -04:00
|
|
|
t1:
|
|
|
|
|
sbb %rdx,%rdx
|
|
|
|
|
cmp $0,%rsi
|
|
|
|
|
jz skiplp
|
|
|
|
|
add %rdx,%rdx
|
|
|
|
|
.align 16
|
|
|
|
|
lp:
|
|
|
|
|
rcrq $1,(%rdi)
|
|
|
|
|
nop
|
|
|
|
|
rcrq $1,-8(%rdi)
|
|
|
|
|
rcrq $1,-16(%rdi)
|
|
|
|
|
rcrq $1,-24(%rdi)
|
|
|
|
|
nop
|
|
|
|
|
dec %rsi
|
|
|
|
|
lea -32(%rdi),%rdi
|
|
|
|
|
jnz lp
|
|
|
|
|
sbb %rdx,%rdx
|
|
|
|
|
skiplp:
|
2011-07-13 08:54:47 -04:00
|
|
|
sub %rdx,%rax
|
|
|
|
|
shl $63,%rax
|
2011-07-13 05:48:02 -04:00
|
|
|
ret
|
|
|
|
|
EPILOGUE()
|
