140 lines
2.8 KiB
NASM
140 lines
2.8 KiB
NASM
dnl mpn_rshift
|
|
|
|
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 ret mpn_rshift(mp_ptr,mp_ptr,mp_size_t,ul)
|
|
C rax rdi, rsi, rdx
|
|
|
|
ASM_START()
|
|
PROLOGUE(mpn_rshift)
|
|
C below really a movq
|
|
movd %rcx,%mm0
|
|
|
|
mov $64,%rax
|
|
sub %rcx,%rax
|
|
|
|
C below really a movq
|
|
movd %rax,%mm1
|
|
|
|
mov $4,%rcx
|
|
lea -32(%rsi,%rdx,8),%rsi
|
|
lea -32(%rdi,%rdx,8),%rdi
|
|
sub %rdx,%rcx
|
|
movq (%rsi,%rcx,8),%mm5
|
|
movq %mm5,%mm3
|
|
psllq %mm1,%mm5
|
|
|
|
C below really a movq
|
|
movd %mm5,%rax
|
|
|
|
psrlq %mm0,%mm3
|
|
jge skiplp
|
|
ALIGN(16)
|
|
lp:
|
|
movq 8(%rsi,%rcx,8),%mm2
|
|
movq %mm2,%mm4
|
|
psllq %mm1,%mm2
|
|
por %mm2,%mm3
|
|
movq %mm3,(%rdi,%rcx,8)
|
|
psrlq %mm0,%mm4
|
|
movq 16(%rsi,%rcx,8),%mm5
|
|
movq %mm5,%mm3
|
|
psllq %mm1,%mm5
|
|
por %mm5,%mm4
|
|
movq %mm4,8(%rdi,%rcx,8)
|
|
psrlq %mm0,%mm3
|
|
movq 24(%rsi,%rcx,8),%mm2
|
|
movq %mm2,%mm4
|
|
psllq %mm1,%mm2
|
|
por %mm2,%mm3
|
|
movq 32(%rsi,%rcx,8),%mm5
|
|
movq %mm3,16(%rdi,%rcx,8)
|
|
psrlq %mm0,%mm4
|
|
movq %mm5,%mm3
|
|
psllq %mm1,%mm5
|
|
por %mm5,%mm4
|
|
movq %mm4,24(%rdi,%rcx,8)
|
|
psrlq %mm0,%mm3
|
|
add $4,%rcx
|
|
jnc lp
|
|
skiplp:
|
|
cmp $2,%rcx
|
|
ja case0
|
|
jz case1
|
|
jp case2
|
|
case3:
|
|
movq 8(%rsi,%rcx,8),%mm2
|
|
movq %mm2,%mm4
|
|
psllq %mm1,%mm2
|
|
por %mm2,%mm3
|
|
movq %mm3,(%rdi,%rcx,8)
|
|
psrlq %mm0,%mm4
|
|
movq 16(%rsi,%rcx,8),%mm5
|
|
movq %mm5,%mm3
|
|
psllq %mm1,%mm5
|
|
por %mm5,%mm4
|
|
movq %mm4,8(%rdi,%rcx,8)
|
|
psrlq %mm0,%mm3
|
|
movq 24(%rsi,%rcx,8),%mm2
|
|
movq %mm2,%mm4
|
|
psllq %mm1,%mm2
|
|
por %mm2,%mm3
|
|
movq %mm3,16(%rdi,%rcx,8)
|
|
psrlq %mm0,%mm4
|
|
movq %mm4,24(%rdi,%rcx,8)
|
|
emms
|
|
ret
|
|
ALIGN(16)
|
|
case2:
|
|
movq 8(%rsi,%rcx,8),%mm2
|
|
movq %mm2,%mm4
|
|
psllq %mm1,%mm2
|
|
por %mm2,%mm3
|
|
movq %mm3,(%rdi,%rcx,8)
|
|
psrlq %mm0,%mm4
|
|
movq 16(%rsi,%rcx,8),%mm5
|
|
movq %mm5,%mm3
|
|
psllq %mm1,%mm5
|
|
por %mm5,%mm4
|
|
movq %mm4,8(%rdi,%rcx,8)
|
|
psrlq %mm0,%mm3
|
|
movq %mm3,16(%rdi,%rcx,8)
|
|
emms
|
|
ret
|
|
ALIGN(16)
|
|
case1:
|
|
movq 8(%rsi,%rcx,8),%mm2
|
|
movq %mm2,%mm4
|
|
psllq %mm1,%mm2
|
|
por %mm2,%mm3
|
|
movq %mm3,(%rdi,%rcx,8)
|
|
psrlq %mm0,%mm4
|
|
movq %mm4,8(%rdi,%rcx,8)
|
|
emms
|
|
ret
|
|
ALIGN(16)
|
|
case0:
|
|
movq %mm3,(%rdi,%rcx,8)
|
|
emms
|
|
ret
|
|
EPILOGUE()
|