| /* __lshrdi3.S: 64-bit logical 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 |
| |
| ############################################################################### |
| # |
| # unsigned long long __lshrdi3(unsigned long long value [GR8:GR9], unsigned by [GR10]) |
| # |
| ############################################################################### |
| .globl __lshrdi3 |
| .type __lshrdi3,@function |
| __lshrdi3: |
| 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 |
| 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 |
| csrl 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 |
| csrl gr8,gr10,gr9 ,cc4,#0 ; LSW = MSW >> (N & 31 [implicit AND]) |
| cor.p gr0,gr0,gr8 ,cc4,#0 ; MSW = 0 |
| bralr |
| .size __lshrdi3, .-__lshrdi3 |
