1 %default { "func":"dvmInterpHandlePackedSwitch" } 2 %verify executed 3 /* 4 * Handle a packed-switch or sparse-switch instruction. In both cases 5 * we decode it and hand it off to a helper function. 6 * 7 * We don't really expect backward branches in a switch statement, but 8 * they're perfectly legal, so we check for them here. 9 * 10 * When the JIT is present, all targets are considered treated as 11 * a potential trace heads regardless of branch direction. 12 * 13 * for: packed-switch, sparse-switch 14 */ 15 /* op vAA, +BBBB */ 16 FETCH(r0, 1) @ r0<- bbbb (lo) 17 FETCH(r1, 2) @ r1<- BBBB (hi) 18 mov r3, rINST, lsr #8 @ r3<- AA 19 orr r0, r0, r1, lsl #16 @ r0<- BBBBbbbb 20 GET_VREG(r1, r3) @ r1<- vAA 21 add r0, rPC, r0, lsl #1 @ r0<- PC + BBBBbbbb*2 22 bl $func @ r0<- code-unit branch offset 23 adds r1, r0, r0 @ r1<- byte offset; clear V 24 #if defined(WITH_JIT) 25 ldr r0, [rSELF, #offThread_pJitProfTable] 26 ldrle rIBASE, [rSELF, #offThread_curHandlerTable] @ refresh handler base 27 FETCH_ADVANCE_INST_RB(r1) @ update rPC, load rINST 28 cmp r0, #0 29 bne common_updateProfile 30 #else 31 ldrle rIBASE, [rSELF, #offThread_curHandlerTable] @ refresh handler base 32 FETCH_ADVANCE_INST_RB(r1) @ update rPC, load rINST 33 #endif 34 GET_INST_OPCODE(ip) @ extract opcode from rINST 35 GOTO_OPCODE(ip) @ jump to next instruction 36
