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: binopD2addr.S 18 * 19 * Code: 32-bit "/2addr" integer divde operation. If "div" 20 * is set, the code returns the quotient, else it returns 21 * the remainder. Also, a divide-by-zero check is done. 22 * 23 * For: div-int/2addr, rem-int/2addr 24 * 25 * Description: Perform a binary operation on two sources registers 26 * and store the result in the first source register 27 * 28 * Format: B|A|op (12x) 29 * 30 * Syntax: op vA, vB 31 */ 32 33 %default {"div":"1"} 34 movl rINST, %ecx # %ecx<- BA 35 andl $$15, rINST # rINST<- A, to be used as dest 36 movl rINST, %eax # %eax<- A 37 shr $$4, %ecx # %ecx<- B 38 GET_VREG %eax # %eax<- vA 39 GET_VREG %ecx # %edx<- vB 40 cmp $$0, %ecx # check for divide by zero 41 je common_errDivideByZero # handle divide by zero 42 cmpl $$-1, %ecx # handle -1 special case divide error 43 jne .L${opcode}_noerror 44 cmpl $$0x80000000,%eax # handle min int special case divide error 45 je .L${opcode}_break 46 .L${opcode}_noerror: 47 cdq # sign-extend %eax to %edx 48 idiv %ecx # divide %edx:%eax by %ecx 49 .if $div 50 SET_VREG %eax rINST # vAA<- %eax (quotient) 51 .else 52 SET_VREG %edx rINST # vAA<- %edx (remainder) 53 .endif 54 jmp .L${opcode}_break2 55 #FFETCH_ADV 1, %edx # %ecx<- next instruction hi; fetch, advance 56 #FGETOP_JMP 1, %edx # jump to next instruction; getop, jmp 57 58 %break 59 .L${opcode}_break: 60 .if $div 61 movl $$0x80000000, (rFP, rINST, 4) # vAA<- min int 62 .else 63 movl $$0, (rFP, rINST, 4) # vAA<- 0 64 .endif 65 .L${opcode}_break2: 66 FFETCH_ADV 1, %edx # %ecx<- next instruction hi; fetch, advance 67 FGETOP_JMP 1, %edx # jump to next instruction; getop, jmp 68 69
