1! SPDX-License-Identifier: GPL-2.0 2! Copyright (C) 2012 by Imagination Technologies Ltd. 3! 4! 64-bit logical shift right routine. 5! 6 7 .text 8 .global ___lshrdi3 9 .type ___lshrdi3,function 10 11___lshrdi3: 12 MOV D0Re0,D0Ar2 13 MOV D1Re0,D1Ar1 14 CMP D1Ar3,#0 ! COUNT == 0 15 MOVEQ PC,D1RtP ! Yes, return 16 17 MOV D0Ar4,D1Ar3 18 SUBS D1Ar3,D1Ar3,#32 ! N = COUNT - 32 19 BGE $L30 20 21!! Shift < 32 22 NEG D1Ar3,D1Ar3 ! N = - N 23 LSR D0Re0,D0Re0,D0Ar4 ! LO = LO >> COUNT 24 LSL D0Ar6,D1Re0,D1Ar3 ! TMP= HI << -(COUNT - 32) 25 OR D0Re0,D0Re0,D0Ar6 ! LO = LO | TMP 26 SWAP D1Ar3,D0Ar4 27 LSR D1Re0,D1Re0,D1Ar3 ! HI = HI >> COUNT 28 MOV PC,D1RtP 29$L30: 30!! Shift >= 32 31 LSR D0Re0,D1Re0,D1Ar3 ! LO = HI >> N 32 MOV D1Re0,#0 ! HI = 0 33 MOV PC,D1RtP 34 .size ___lshrdi3,.-___lshrdi3 35