1 %default { "load":"ldr", "shift":"2", "data_offset":"MIRROR_INT_ARRAY_DATA_OFFSET" } 2 /* 3 * Array get, 32 bits or less. vAA <- vBB[vCC]. 4 * 5 * Note: using the usual FETCH/and/shift stuff, this fits in exactly 17 6 * instructions. We use a pair of FETCH_Bs instead. 7 * 8 * for: aget, aget-boolean, aget-byte, aget-char, aget-short 9 * 10 * NOTE: assumes data offset for arrays is the same for all non-wide types. 11 * If this changes, specialize. 12 */ 13 /* op vAA, vBB, vCC */ 14 FETCH_B w2, 1, 0 // w2<- BB 15 lsr w9, wINST, #8 // w9<- AA 16 FETCH_B w3, 1, 1 // w3<- CC 17 GET_VREG w0, w2 // w0<- vBB (array object) 18 GET_VREG w1, w3 // w1<- vCC (requested index) 19 cbz x0, common_errNullObject // bail if null array object. 20 ldr w3, [x0, #MIRROR_ARRAY_LENGTH_OFFSET] // w3<- arrayObj->length 21 add x0, x0, w1, uxtw #$shift // w0<- arrayObj + index*width 22 cmp w1, w3 // compare unsigned index, length 23 bcs common_errArrayIndex // index >= length, bail 24 FETCH_ADVANCE_INST 2 // advance rPC, load rINST 25 $load w2, [x0, #$data_offset] // w2<- vBB[vCC] 26 GET_INST_OPCODE ip // extract opcode from rINST 27 SET_VREG w2, w9 // vAA<- w2 28 GOTO_OPCODE ip // jump to next instruction 29
