| Serguei Katkov | c669beb | 2016-01-14 10:30:21 +0600 | [diff] [blame^] | 1 | %default {"result":"","rem":"0"} |
| 2 | /* |
| 3 | * 32-bit binary div/rem operation. Handles special case of op1=-1. |
| 4 | */ |
| 5 | /* div/rem/lit16 vA, vB, #+CCCC */ |
| 6 | /* Need A in rINST, ssssCCCC in ecx, vB in eax */ |
| 7 | movl rINST, %eax # rax <- 000000BA |
| 8 | sarl $$4, %eax # eax <- B |
| 9 | GET_VREG %eax, %rax # eax <- vB |
| 10 | movswl 2(rPC), %ecx # ecx <- ssssCCCC |
| 11 | andb $$0xf, rINSTbl # rINST <- A |
| 12 | testl %ecx, %ecx |
| 13 | jz common_errDivideByZero |
| 14 | cmpl $$-1, %ecx |
| 15 | je 2f |
| 16 | cdq # rax <- sign-extended of eax |
| 17 | idivl %ecx |
| 18 | 1: |
| 19 | SET_VREG $result, rINSTq # vA <- result |
| 20 | ADVANCE_PC_FETCH_AND_GOTO_NEXT 2 |
| 21 | 2: |
| 22 | .if $rem |
| 23 | xorl $result, $result |
| 24 | .else |
| 25 | negl $result |
| 26 | .endif |
| 27 | jmp 1b |