1/* __lshrdi3.S: 64-bit logical shift right 2 * 3 * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved. 4 * Written by David Howells (dhowells@redhat.com) 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 */ 11 12 .text 13 .p2align 4 14 15############################################################################### 16# 17# unsigned long long __lshrdi3(unsigned long long value [GR8:GR9], unsigned by [GR10]) 18# 19############################################################################### 20 .globl __lshrdi3 21 .type __lshrdi3,@function 22__lshrdi3: 23 andicc.p gr10,#63,gr10,icc0 24 setlos #32,gr5 25 andicc.p gr10,#32,gr0,icc1 26 beqlr icc0,#0 27 ckeq icc1,cc4 ; cc4 is true if 0<N<32 28 29 # deal with a shift in the range 1<=N<=31 30 csrl.p gr9,gr10,gr9 ,cc4,#1 ; LSW >>= N 31 csub gr5,gr10,gr5 ,cc4,#1 ; M = 32 - N 32 csll.p gr8,gr5,gr4 ,cc4,#1 33 csrl gr8,gr10,gr8 ,cc4,#1 ; MSW >>= N 34 cor.p gr4,gr9,gr9 ,cc4,#1 ; LSW |= MSW << M 35 36 # deal with a shift in the range 32<=N<=63 37 csrl gr8,gr10,gr9 ,cc4,#0 ; LSW = MSW >> (N & 31 [implicit AND]) 38 cor.p gr0,gr0,gr8 ,cc4,#0 ; MSW = 0 39 bralr 40 .size __lshrdi3, .-__lshrdi3 41