| %default { "func":"MterpDoPackedSwitch" } |
| /* |
| * Handle a packed-switch or sparse-switch instruction. In both cases |
| * we decode it and hand it off to a helper function. |
| * |
| * We don't really expect backward branches in a switch statement, but |
| * they're perfectly legal, so we check for them here. |
| * |
| * for: packed-switch, sparse-switch |
| */ |
| /* op vAA, +BBBB */ |
| #if MTERP_SUSPEND |
| FETCH r0, 1 @ r0<- bbbb (lo) |
| FETCH r1, 2 @ r1<- BBBB (hi) |
| mov r3, rINST, lsr #8 @ r3<- AA |
| orr r0, r0, r1, lsl #16 @ r0<- BBBBbbbb |
| GET_VREG r1, r3 @ r1<- vAA |
| add r0, rPC, r0, lsl #1 @ r0<- PC + BBBBbbbb*2 |
| bl $func @ r0<- code-unit branch offset |
| adds r1, r0, r0 @ r1<- byte offset; clear V |
| ldrle rIBASE, [rSELF, #THREAD_CURRENT_IBASE_OFFSET] @ refresh handler base |
| FETCH_ADVANCE_INST_RB r1 @ update rPC, load rINST |
| GET_INST_OPCODE ip @ extract opcode from rINST |
| GOTO_OPCODE ip @ jump to next instruction |
| #else |
| FETCH r0, 1 @ r0<- bbbb (lo) |
| FETCH r1, 2 @ r1<- BBBB (hi) |
| mov r3, rINST, lsr #8 @ r3<- AA |
| orr r0, r0, r1, lsl #16 @ r0<- BBBBbbbb |
| GET_VREG r1, r3 @ r1<- vAA |
| add r0, rPC, r0, lsl #1 @ r0<- PC + BBBBbbbb*2 |
| bl $func @ r0<- code-unit branch offset |
| ldr lr, [rSELF, #THREAD_FLAGS_OFFSET] |
| adds r1, r0, r0 @ r1<- byte offset; clear V |
| FETCH_ADVANCE_INST_RB r1 @ update rPC, load rINST |
| ble MterpCheckSuspendAndContinue |
| GET_INST_OPCODE ip @ extract opcode from rINST |
| GOTO_OPCODE ip @ jump to next instruction |
| #endif |
