%default { "load":"lw", "shift":"2" } %verify "executed" /* * 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-object, aget-boolean, aget-byte, aget-char, aget-short */ /* op vAA, vBB, vCC */ FETCH_B(a2, 1) # a2 <- BB GET_OPA(rOBJ) # rOBJ <- AA FETCH_C(a3, 1) # a3 <- CC GET_VREG(a0, a2) # a0 <- vBB (array object) GET_VREG(a1, a3) # a1 <- vCC (requested index) # null array object? beqz a0, common_errNullObject # yes, bail LOAD_base_offArrayObject_length(a3, a0) # a3 <- arrayObj->length .if $shift EASN(a0, a0, a1, $shift) # a0 <- arrayObj + index*width .else addu a0, a0, a1 .endif # a1 >= a3; compare unsigned index bgeu a1, a3, common_errArrayIndex # index >= length, bail FETCH_ADVANCE_INST(2) # advance rPC, load rINST $load a2, offArrayObject_contents(a0) # a2 <- vBB[vCC] GET_INST_OPCODE(t0) # extract opcode from rINST SET_VREG_GOTO(a2, rOBJ, t0) # vAA <- a2