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 r2, 1, 0 @ r2<- BB 15 mov r9, rINST, lsr #8 @ r9<- AA 16 FETCH_B r3, 1, 1 @ r3<- CC 17 GET_VREG r0, r2 @ r0<- vBB (array object) 18 GET_VREG r1, r3 @ r1<- vCC (requested index) 19 cmp r0, #0 @ null array object? 20 beq common_errNullObject @ yes, bail 21 ldr r3, [r0, #MIRROR_ARRAY_LENGTH_OFFSET] @ r3<- arrayObj->length 22 add r0, r0, r1, lsl #$shift @ r0<- arrayObj + index*width 23 cmp r1, r3 @ compare unsigned index, length 24 bcs common_errArrayIndex @ index >= length, bail 25 FETCH_ADVANCE_INST 2 @ advance rPC, load rINST 26 $load r2, [r0, #$data_offset] @ r2<- vBB[vCC] 27 GET_INST_OPCODE ip @ extract opcode from rINST 28 SET_VREG r2, r9 @ vAA<- r2 29 GOTO_OPCODE ip @ jump to next instruction 30
