1 %default {"result":"","special":"","rem":""} 2 /* 3 * 32-bit binary div/rem operation. Handles special case of op0=minint and 4 * op1=-1. 5 */ 6 /* div/rem vAA, vBB, vCC */ 7 movzbl 2(rPC), %eax # eax <- BB 8 movzbl 3(rPC), %ecx # ecx <- CC 9 GET_VREG %eax, %eax # eax <- vBB 10 GET_VREG %ecx, %ecx # ecx <- vCC 11 mov rIBASE, LOCAL0(%esp) 12 testl %ecx, %ecx 13 je common_errDivideByZero 14 movl %eax, %edx 15 orl %ecx, %edx 16 testl $$0xFFFFFF00, %edx # If both arguments are less 17 # than 8-bit and +ve 18 jz .L${opcode}_8 # Do 8-bit divide 19 testl $$0xFFFF0000, %edx # If both arguments are less 20 # than 16-bit and +ve 21 jz .L${opcode}_16 # Do 16-bit divide 22 cmpl $$-1, %ecx 23 jne .L${opcode}_32 24 cmpl $$0x80000000, %eax 25 jne .L${opcode}_32 26 movl $special, $result 27 jmp .L${opcode}_finish 28 .L${opcode}_32: 29 cltd 30 idivl %ecx 31 jmp .L${opcode}_finish 32 .L${opcode}_8: 33 div %cl # 8-bit divide otherwise. 34 # Remainder in %ah, quotient in %al 35 .if $rem 36 movl %eax, %edx 37 shr $$8, %edx 38 .else 39 andl $$0x000000FF, %eax 40 .endif 41 jmp .L${opcode}_finish 42 .L${opcode}_16: 43 xorl %edx, %edx # Clear %edx before divide 44 div %cx 45 .L${opcode}_finish: 46 SET_VREG $result, rINST 47 mov LOCAL0(%esp), rIBASE 48 ADVANCE_PC_FETCH_AND_GOTO_NEXT 2 49
