1   /* Copyright (C) 2008 The Android Open Source Project
2    *
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
6    *
7    * http://www.apache.org/licenses/LICENSE-2.0
8    *
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.
14    */
15
16   /*
17    * File: binopLit16.S
18    *
19    * Code: 32-bit "lit16" operation. Provides an "instr" line to
20    *       specify an instruction that performs "%ecx = %ecx op %edx"
21    *
22    *
23    * For: add-int/lit16, and-int/lit16, mul-int/lit16, or-int/lit16
24    *      xor-int/lit16
25    *
26    * Description: Perform a binary operation on a register and a
27    *              sign extended 16-bit literal value and store the
28    *              result in a destination register.
29    *
30    * Format: B|A|op CCCC (22s)
31    *
32    * Syntax: op vA, vB, #+CCCC
33    */
34
35    movl        rINST, %ecx             # %ecx<- BA
36    shr         $$4, %ecx               # %ecx<- B
37    andl        $$15, rINST             # rINST<- A
38    FETCHs      1, %edx                 # %edx<- +CCCC, sign-extended literal
39    FFETCH_ADV  2, %eax                 # %eax<- next instruction hi; fetch, advance
40    GET_VREG    %ecx                    # %ecx<- vB
41    $instr                              # %ecx<- vA op vB
42    SET_VREG    %ecx, rINST             # vA<- %ecx; result
43    FGETOP_JMP  2, %eax                 # jump to next instruction; getop, jmp