%def field(helper=""): /* * General field read / write (iget-* iput-* sget-* sput-*). */ .extern $helper mov r0, rPC @ arg0: Instruction* inst mov r1, rINST @ arg1: uint16_t inst_data add r2, rFP, #OFF_FP_SHADOWFRAME @ arg2: ShadowFrame* sf mov r3, rSELF @ arg3: Thread* self PREFETCH_INST 2 @ prefetch next opcode bl $helper cmp r0, #0 beq MterpPossibleException ADVANCE 2 GET_INST_OPCODE ip @ extract opcode from rINST GOTO_OPCODE ip @ jump to next instruction %def op_check_cast(): /* * Check to see if a cast from one class to another is allowed. */ /* check-cast vAA, class@BBBB */ EXPORT_PC FETCH r0, 1 @ r0<- BBBB mov r1, rINST, lsr #8 @ r1<- AA VREG_INDEX_TO_ADDR r1, r1 @ r1<- &object ldr r2, [rFP, #OFF_FP_METHOD] @ r2<- method mov r3, rSELF @ r3<- self bl MterpCheckCast @ (index, &obj, method, self) PREFETCH_INST 2 cmp r0, #0 bne MterpPossibleException ADVANCE 2 GET_INST_OPCODE ip @ extract opcode from rINST GOTO_OPCODE ip @ jump to next instruction %def op_iget(is_object=False, is_wide=False, load="ldr", helper="MterpIGetU32"): @ Fast-path which gets the field offset from thread-local cache. add r0, rSELF, #THREAD_INTERPRETER_CACHE_OFFSET @ cache address ubfx r1, rPC, #2, #THREAD_INTERPRETER_CACHE_SIZE_LOG2 @ entry index add r0, r0, r1, lsl #3 @ entry address within the cache ldrd r0, r1, [r0] @ entry key (pc) and value (offset) mov r2, rINST, lsr #12 @ B GET_VREG r2, r2 @ object we're operating on cmp r0, rPC % slow_path_label = add_helper(lambda: field(helper)) bne ${slow_path_label} @ cache miss cmp r2, #0 beq common_errNullObject @ null object % if is_wide: ldrd r0, r1, [r1, r2] @ r0,r1 <- obj.field % else: ${load} r0, [r2, r1] @ r0 <- obj.field % #endif % if is_object: UNPOISON_HEAP_REF r0 #if defined(USE_READ_BARRIER) # if defined(USE_BAKER_READ_BARRIER) ldr ip, [rSELF, #THREAD_IS_GC_MARKING_OFFSET] cmp ip, #0 bne .L_${opcode}_mark @ GC is active .L_${opcode}_marked: # else bl artReadBarrierMark @ r0 <- artReadBarrierMark(r0) # endif #endif % #endif ubfx r2, rINST, #8, #4 @ A FETCH_ADVANCE_INST 2 @ advance rPC, load rINST % if is_object: SET_VREG_OBJECT r0, r2 @ fp[A]<- r0 % elif is_wide: SET_VREG_WIDE r0, r1, r2 @ fp[A]<- r0, r1 % else: SET_VREG r0, r2 @ fp[A]<- r0 % #endif GET_INST_OPCODE ip @ extract opcode from rINST GOTO_OPCODE ip @ jump to next instruction % if is_object: #if defined(USE_READ_BARRIER) && defined(USE_BAKER_READ_BARRIER) .L_${opcode}_mark: bl artReadBarrierMark @ r0 <- artReadBarrierMark(r0) b .L_${opcode}_marked #endif % #endif %def op_iget_boolean(): % op_iget(load="ldrb", helper="MterpIGetU8") %def op_iget_byte(): % op_iget(load="ldrsb", helper="MterpIGetI8") %def op_iget_char(): % op_iget(load="ldrh", helper="MterpIGetU16") %def op_iget_object(): % op_iget(is_object=True, helper="MterpIGetObj") %def op_iget_short(): % op_iget(load="ldrsh", helper="MterpIGetI16") %def op_iget_wide(): % op_iget(is_wide=True, helper="MterpIGetU64") %def op_instance_of(): /* * Check to see if an object reference is an instance of a class. * * Most common situation is a non-null object, being compared against * an already-resolved class. */ /* instance-of vA, vB, class@CCCC */ EXPORT_PC FETCH r0, 1 @ r0<- CCCC mov r1, rINST, lsr #12 @ r1<- B VREG_INDEX_TO_ADDR r1, r1 @ r1<- &object ldr r2, [rFP, #OFF_FP_METHOD] @ r2<- method mov r3, rSELF @ r3<- self bl MterpInstanceOf @ (index, &obj, method, self) ldr r1, [rSELF, #THREAD_EXCEPTION_OFFSET] ubfx r9, rINST, #8, #4 @ r9<- A PREFETCH_INST 2 cmp r1, #0 @ exception pending? bne MterpException ADVANCE 2 @ advance rPC SET_VREG r0, r9 @ vA<- r0 GET_INST_OPCODE ip @ extract opcode from rINST GOTO_OPCODE ip @ jump to next instruction %def op_iput(helper="MterpIPutU32"): % field(helper=helper) %def op_iput_boolean(): % op_iput(helper="MterpIPutU8") %def op_iput_byte(): % op_iput(helper="MterpIPutI8") %def op_iput_char(): % op_iput(helper="MterpIPutU16") %def op_iput_object(): % op_iput(helper="MterpIPutObj") %def op_iput_short(): % op_iput(helper="MterpIPutI16") %def op_iput_wide(): % op_iput(helper="MterpIPutU64") %def op_new_instance(): /* * Create a new instance of a class. */ /* new-instance vAA, class@BBBB */ EXPORT_PC add r0, rFP, #OFF_FP_SHADOWFRAME mov r1, rSELF mov r2, rINST bl MterpNewInstance @ (shadow_frame, self, inst_data) cmp r0, #0 beq MterpPossibleException FETCH_ADVANCE_INST 2 @ advance rPC, load rINST GET_INST_OPCODE ip @ extract opcode from rINST GOTO_OPCODE ip @ jump to next instruction %def op_sget(helper="MterpSGetU32"): % field(helper=helper) %def op_sget_boolean(): % op_sget(helper="MterpSGetU8") %def op_sget_byte(): % op_sget(helper="MterpSGetI8") %def op_sget_char(): % op_sget(helper="MterpSGetU16") %def op_sget_object(): % op_sget(helper="MterpSGetObj") %def op_sget_short(): % op_sget(helper="MterpSGetI16") %def op_sget_wide(): % op_sget(helper="MterpSGetU64") %def op_sput(helper="MterpSPutU32"): % field(helper=helper) %def op_sput_boolean(): % op_sput(helper="MterpSPutU8") %def op_sput_byte(): % op_sput(helper="MterpSPutI8") %def op_sput_char(): % op_sput(helper="MterpSPutU16") %def op_sput_object(): % op_sput(helper="MterpSPutObj") %def op_sput_short(): % op_sput(helper="MterpSPutI16") %def op_sput_wide(): % op_sput(helper="MterpSPutU64")