1 %default { "func":"MterpDoPackedSwitch" } 2 /* 3 * Handle a packed-switch or sparse-switch instruction. In both cases 4 * we decode it and hand it off to a helper function. 5 * 6 * We don't really expect backward branches in a switch statement, but 7 * they're perfectly legal, so we check for them here. 8 * 9 * for: packed-switch, sparse-switch 10 */ 11 /* op vAA, +BBBB */ 12 FETCH w0, 1 // x0<- 000000000000bbbb (lo) 13 FETCH_S x1, 2 // x1<- ssssssssssssBBBB (hi) 14 lsr w3, wINST, #8 // w3<- AA 15 orr x0, x0, x1, lsl #16 // x0<- ssssssssBBBBbbbb 16 GET_VREG w1, w3 // w1<- vAA 17 add x0, xPC, x0, lsl #1 // x0<- PC + ssssssssBBBBbbbb*2 18 bl $func // w0<- code-unit branch offset 19 sxtw xINST, w0 20 b MterpCommonTakenBranchNoFlags 21
