| ! SPDX-License-Identifier: GPL-2.0 |
| ! Copyright (C) 2012 by Imagination Technologies Ltd. |
| ! |
| ! 64-bit arithmetic shift right routine. |
| ! |
| |
| .text |
| .global ___ashrdi3 |
| .type ___ashrdi3,function |
| |
| ___ashrdi3: |
| MOV D0Re0,D0Ar2 |
| MOV D1Re0,D1Ar1 |
| CMP D1Ar3,#0 ! COUNT == 0 |
| MOVEQ PC,D1RtP ! Yes, return |
| |
| MOV D0Ar4,D1Ar3 |
| SUBS D1Ar3,D1Ar3,#32 ! N = COUNT - 32 |
| BGE $L20 |
| |
| !! Shift < 32 |
| NEG D1Ar3,D1Ar3 ! N = - N |
| LSR D0Re0,D0Re0,D0Ar4 ! LO = LO >> COUNT |
| LSL D0Ar6,D1Re0,D1Ar3 ! TMP= HI << -(COUNT - 32) |
| OR D0Re0,D0Re0,D0Ar6 ! LO = LO | TMP |
| SWAP D1Ar3,D0Ar4 |
| ASR D1Re0,D1Re0,D1Ar3 ! HI = HI >> COUNT |
| MOV PC,D1RtP |
| $L20: |
| !! Shift >= 32 |
| ASR D0Re0,D1Re0,D1Ar3 ! LO = HI >> N |
| ASR D1Re0,D1Re0,#31 ! HI = HI >> 31 |
| MOV PC,D1RtP |
| .size ___ashrdi3,.-___ashrdi3 |
