| %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, +BBBBBBBB */ |
| .extern $func |
| lh a0, 2(rPC) # a0 <- bbbb (lo) |
| lh a1, 4(rPC) # a1 <- BBBB (hi) |
| srl a3, rINST, 8 # a3 <- AA |
| ins a0, a1, 16, 16 # a0 <- BBBBbbbb |
| GET_VREG a1, a3 # a1 <- vAA |
| dlsa a0, a0, rPC, 1 # a0 <- PC + BBBBbbbb*2 |
| jal $func # v0 <- code-unit branch offset |
| dlsa rPC, v0, rPC, 1 # rPC <- rPC + offset * 2 |
| FETCH_INST # load rINST |
| #if MTERP_SUSPEND |
| bgtz v0, 1f # offset * 2 > 0 => no suspend check |
| REFRESH_IBASE |
| 1: |
| #else |
| lw ra, THREAD_FLAGS_OFFSET(rSELF) # Preload flags for MterpCheckSuspendAndContinue |
| blez v0, MterpCheckSuspendAndContinue |
| #endif |
| GET_INST_OPCODE v0 # extract opcode from rINST |
| GOTO_OPCODE v0 # jump to next instruction |
