1 /* Copyright (C) 2008 The Android Open Source Project
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
17 * File: OP_USHR_LONG.S
19 * Code: Performs an unsigned shift right long operation. Uses no substitutions.
23 * Description: Perform a binary shift operation using two source registers
24 * where one is the shift amount and the other is the value to shift.
26 * Format: AA|op CC|BB (23x)
28 * Syntax: op vAA, vBB, vCC
31 FETCH_CC 1, %eax # %eax<- CC
32 FETCH_BB 1, %edx # %edx<- BB
33 movsd .LshiftMask, %xmm2 # %xmm2<- mask for the shift bits
34 movss (rFP, %eax, 4), %xmm0 # %xmm0<- vCC
35 pand %xmm2, %xmm0 # %xmm0<- masked shift bits
36 movsd (rFP, %edx, 4), %xmm1 # %xmm1<- vBB
37 psrlq %xmm0, %xmm1 # %xmm1<- shifted vBB
38 movsd %xmm1, (rFP, rINST, 4) # vAA<- shifted vBB
39 FINISH 2 # jump to next instruction