| Douglas Leung | 200f040 | 2016-02-25 20:05:47 -0800 | [diff] [blame] | 1 | %default { "load":"lw", "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(a2, 1, 0) # a2 <- BB |
| 15 | GET_OPA(rOBJ) # rOBJ <- AA |
| 16 | FETCH_B(a3, 1, 1) # a3 <- CC |
| 17 | GET_VREG(a0, a2) # a0 <- vBB (array object) |
| 18 | GET_VREG(a1, a3) # a1 <- vCC (requested index) |
| 19 | # null array object? |
| 20 | beqz a0, common_errNullObject # yes, bail |
| 21 | LOAD_base_offMirrorArray_length(a3, a0) # a3 <- arrayObj->length |
| Douglas Leung | 200f040 | 2016-02-25 20:05:47 -0800 | [diff] [blame] | 22 | EASN(a0, a0, a1, $shift) # a0 <- arrayObj + index*width |
| Douglas Leung | 200f040 | 2016-02-25 20:05:47 -0800 | [diff] [blame] | 23 | # a1 >= a3; compare unsigned index |
| 24 | bgeu a1, a3, common_errArrayIndex # index >= length, bail |
| 25 | FETCH_ADVANCE_INST(2) # advance rPC, load rINST |
| 26 | $load a2, $data_offset(a0) # a2 <- vBB[vCC] |
| 27 | GET_INST_OPCODE(t0) # extract opcode from rINST |
| 28 | SET_VREG_GOTO(a2, rOBJ, t0) # vAA <- a2 |