| /* Copyright (C) 2008 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /* |
| * File: OP_SHR_LONG.S |
| * |
| * Code: Performs a shift right long |
| * |
| * For: shl-long |
| * |
| * Description: Perform a binary shift operation using two source registers |
| * where one is the shift amount and the other is the value to shift. |
| * Store the result in a destination register. |
| * |
| * Format: AA|op CC|BB (23x) |
| * |
| * Syntax: op vAA, vBB, vCC |
| */ |
| |
| FETCH_BB 1, %edx # %edx<- BB |
| FETCH_CC 1, %eax # %eax<- CC |
| movq (rFP, %edx, 4), %xmm1 # %xmm1<- vBB |
| movss (rFP, %eax, 4), %xmm0 # %xmm0<- vCC |
| movq .LshiftMask, %xmm2 |
| pand %xmm2, %xmm0 # %xmm0<- masked for the shift bits |
| psrlq %xmm0, %xmm1 # %xmm1<- shifted vBB |
| cmpl $$0, 4(rFP, %edx, 4) # check if we need to consider sign |
| jl .L${opcode}_finish # consider sign |
| jmp .L${opcode}_final # sign is fine, finish |
| %break |
| |
| .L${opcode}_finish: |
| movq .Lvalue64, %xmm3 # %xmm3<- 64 |
| psubq %xmm0, %xmm3 # %xmm3<- 64 - shift amount |
| movq .L64bits, %xmm4 # %xmm4<- lower 64 bits set |
| psllq %xmm3, %xmm4 # %xmm4<- correct mask for sign bits |
| por %xmm4, %xmm1 # %xmm1<- signed and shifted vBB |
| |
| .L${opcode}_final: |
| movq %xmm1, (rFP, rINST, 4) # vAA<- shifted vBB |
| FINISH 2 # jump to next instruction |
