91 lines
1.9 KiB
NASM
91 lines
1.9 KiB
NASM
|
dnl AMD64 mpn_addsub_n
|
||
|
|
|
||
|
|
dnl Copyright 2009 Jason Moxham
|
||
|
|
|
||
|
|
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')
|
||
|
|
|
||
|
|
C INPUT PARAMETERS
|
||
|
|
C rp rdi
|
||
|
|
C xp rsi
|
||
|
|
C yp rdx
|
||
|
|
C zp rcx
|
||
|
|
C n r8
|
||
|
|
C (rdi,r8)=(rsi,r8)+(rdx,r8)-(rcx,r8)
|
||
|
|
C return carry-borrow
|
||
|
|
|
||
|
|
ASM_START()
|
||
|
|
PROLOGUE(mpn_addsub_n)
|
||
|
|
lea (%rsi,%r8,8),%rsi
|
||
|
|
lea (%rdx,%r8,8),%rdx
|
||
|
|
lea (%rdi,%r8,8),%rdi
|
||
|
|
lea (%rcx,%r8,8),%rcx
|
||
|
|
neg %r8
|
||
|
|
xor %rax,%rax
|
||
|
|
xor %r10,%r10
|
||
|
|
test $3,%r8
|
||
|
|
jz next
|
||
|
|
lp1:
|
||
|
|
mov (%rdx,%r8,8),%r9
|
||
|
|
add $1,%rax
|
||
|
|
sbb (%rcx,%r8,8),%r9
|
||
|
|
sbb %rax,%rax
|
||
|
|
add $1,%r10
|
||
|
|
adc (%rsi,%r8,8),%r9
|
||
|
|
sbb %r10,%r10
|
||
|
|
mov %r9,(%rdi,%r8,8)
|
||
|
|
inc %r8
|
||
|
|
test $3,%r8
|
||
|
|
jnz lp1
|
||
|
|
next:
|
||
|
|
cmp $0,%r8
|
||
|
|
jz end
|
||
|
|
push %rbx
|
||
|
|
push %rbp
|
||
|
|
ALIGN(16)
|
||
|
|
lp:
|
||
|
|
add $1,%rax
|
||
|
|
mov (%rdx,%r8,8),%r9
|
||
|
|
mov 8(%rdx,%r8,8),%rbx
|
||
|
|
mov 16(%rdx,%r8,8),%rbp
|
||
|
|
mov 24(%rdx,%r8,8),%r11
|
||
|
|
sbb (%rcx,%r8,8),%r9
|
||
|
|
sbb 8(%rcx,%r8,8),%rbx
|
||
|
|
sbb 16(%rcx,%r8,8),%rbp
|
||
|
|
sbb 24(%rcx,%r8,8),%r11
|
||
|
|
sbb %rax,%rax
|
||
|
|
add $1,%r10
|
||
|
|
adc (%rsi,%r8,8),%r9
|
||
|
|
adc 8(%rsi,%r8,8),%rbx
|
||
|
|
adc 16(%rsi,%r8,8),%rbp
|
||
|
|
adc 24(%rsi,%r8,8),%r11
|
||
|
|
mov %r9,(%rdi,%r8,8)
|
||
|
|
mov %rbx,8(%rdi,%r8,8)
|
||
|
|
mov %rbp,16(%rdi,%r8,8)
|
||
|
|
mov %r11,24(%rdi,%r8,8)
|
||
|
|
sbb %r10,%r10
|
||
|
|
add $4,%r8
|
||
|
|
jnz lp
|
||
|
|
pop %rbp
|
||
|
|
pop %rbx
|
||
|
|
end:
|
||
|
|
sub %r10,%rax
|
||
|
|
ret
|
||
|
|
EPILOGUE()
|