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