mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 07:16:56 +07:00
42 lines
1.3 KiB
ArmAsm
42 lines
1.3 KiB
ArmAsm
|
/* __ashrdi3.S: 64-bit arithmetic shift right
|
||
|
|
*
|
||
|
|
* Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
|
||
|
|
* Written by David Howells (dhowells@redhat.com)
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU General Public License
|
||
|
|
* as published by the Free Software Foundation; either version
|
||
|
|
* 2 of the License, or (at your option) any later version.
|
||
|
|
*/
|
||
|
|
|
||
|
|
.text
|
||
|
|
.p2align 4
|
||
|
|
|
||
|
|
###############################################################################
|
||
|
|
#
|
||
|
|
# signed long long __ashrdi3(signed long long value [GR8:GR9], unsigned by [GR10])
|
||
|
|
#
|
||
|
|
###############################################################################
|
||
|
|
.globl __ashrdi3
|
||
|
|
.type __ashrdi3,@function
|
||
|
|
__ashrdi3:
|
||
|
|
andicc.p gr10,#63,gr10,icc0
|
||
|
|
setlos #32,gr5
|
||
|
|
andicc.p gr10,#32,gr0,icc1
|
||
|
|
beqlr icc0,#0
|
||
|
|
setlos.p #31,gr6
|
||
|
|
ckeq icc1,cc4 ; cc4 is true if 0<N<32
|
||
|
|
|
||
|
|
# deal with a shift in the range 1<=N<=31
|
||
|
|
csrl.p gr9,gr10,gr9 ,cc4,#1 ; LSW >>= N
|
||
|
|
csub gr5,gr10,gr5 ,cc4,#1 ; M = 32 - N
|
||
|
|
csll.p gr8,gr5,gr4 ,cc4,#1
|
||
|
|
csra gr8,gr10,gr8 ,cc4,#1 ; MSW >>= N
|
||
|
|
cor.p gr4,gr9,gr9 ,cc4,#1 ; LSW |= MSW << M
|
||
|
|
|
||
|
|
# deal with a shift in the range 32<=N<=63
|
||
|
|
csra gr8,gr10,gr9 ,cc4,#0 ; LSW = MSW >> (N & 31 [implicit AND])
|
||
|
|
csra.p gr8,gr6,gr8 ,cc4,#0 ; MSW >>= 31
|
||
|
|
bralr
|
||
|
|
.size __ashrdi3, .-__ashrdi3
|