| /* 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: binopDLit16.S |
| * |
| * Code: 32-bit "lit16" divide operation. If "div" is set, the code |
| * returns the quotient, else it returns the remainder. |
| * Also, a divide-by-zero check is done. |
| * |
| * For: div-int/lit16, rem-int/lit16 |
| * |
| * Description: Perform a binary operation on a register and a |
| * sign extended 16-bit literal value |
| * |
| * Format: B|A|op CCCC (22s) |
| * |
| * Syntax: op vA, vB, #+CCCC |
| */ |
| |
| %default {"div":"1"} |
| |
| movl rINST, %eax # %eax<- BA |
| shr $$4, %eax # %eax<- B |
| FETCHs 1, %ecx # %ecx<- +CCCC, sign-extended literal |
| cmp $$0, %ecx # check for divide by zero |
| GET_VREG %eax # %eax<- vB |
| je common_errDivideByZero # handle divide by zero |
| andl $$15, rINST # rINST<- A |
| cmpl $$-1, %ecx # handle -1 special case divide error |
| jne .L${opcode}_noerror |
| cmpl $$0x80000000,%eax # handle min int special case divide error |
| je .L${opcode}_break |
| .L${opcode}_noerror: |
| cdq # sign-extend %eax to %edx |
| idiv %ecx # divide %edx:%eax by %ecx |
| #FFETCH_ADV 2, %ecx # %ecx<- next instruction hi; fetch, advance |
| .if $div |
| SET_VREG %eax rINST # vA<- %eax (quotient) |
| .else |
| SET_VREG %edx rINST # vA<- %edx (remainder) |
| .endif |
| jmp .L${opcode}_break2 |
| |
| %break |
| .L${opcode}_break: |
| .if $div |
| movl $$0x80000000, (rFP, rINST, 4) # vAA<- min int |
| .else |
| movl $$0, (rFP, rINST, 4) # vAA<- 0 |
| .endif |
| .L${opcode}_break2: |
| |
| FINISH 2 # jump to next instruction |