41 lines
1.3 KiB
ArmAsm
41 lines
1.3 KiB
ArmAsm
/* __ashldi3.S: 64-bit arithmetic shift left
|
|
*
|
|
* 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
|
|
|
|
###############################################################################
|
|
#
|
|
# unsigned long long __ashldi3(unsigned long long value [GR8:GR9], unsigned by [GR10])
|
|
#
|
|
###############################################################################
|
|
.globl __ashldi3
|
|
.type __ashldi3,@function
|
|
__ashldi3:
|
|
andicc.p gr10,#63,gr10,icc0
|
|
setlos #32,gr5
|
|
andicc.p gr10,#32,gr0,icc1
|
|
beqlr icc0,#0
|
|
ckeq icc1,cc4 ; cc4 is true if 0<N<32
|
|
|
|
# deal with a shift in the range 1<=N<=31
|
|
csll.p gr8,gr10,gr8 ,cc4,#1 ; MSW <<= N
|
|
csub gr5,gr10,gr5 ,cc4,#1 ; M = 32 - N
|
|
csrl.p gr9,gr5,gr4 ,cc4,#1
|
|
csll gr9,gr10,gr9 ,cc4,#1 ; LSW <<= N
|
|
cor.p gr4,gr8,gr8 ,cc4,#1 ; MSW |= LSW >> M
|
|
|
|
# deal with a shift in the range 32<=N<=63
|
|
csll gr9,gr10,gr8 ,cc4,#0 ; MSW = LSW << (N & 31 [implicit AND])
|
|
cor.p gr0,gr0,gr9 ,cc4,#0 ; LSW = 0
|
|
bralr
|
|
.size __ashldi3, .-__ashldi3
|