/* __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
