%def op_aget(load="ldr" , shift=2 , data_offset="MIRROR_INT_ARRAY_DATA_OFFSET" , wide=False, is_object=False):
/*
* Array get . vAA < - vBB [ vCC ] .
*
* for : aget , aget - boolean , aget - byte , aget - char , aget - short , aget - wide , aget - object
*
*/
FETCH_B w9, 1 , 0 // w9<- BB
lsr w2, wINST, #8 // w2<- AA
FETCH_B w3, 1 , 1 // w3<- CC
GET_VREG w0, w9 // w0<- vBB (array object)
GET_VREG w1, w3 // w1<- vCC (requested index)
// Note: if x0 is null, this will be handled by our SIGSEGV handler.
ldr w3, [x0, #MIRROR_ARRAY_LENGTH_OFFSET] // w3<- arrayObj->length
add x0, x0, w1, uxtw #$shift // w0<- arrayObj + index*width
cmp w1, w3 // compare unsigned index, length
bcs common_errArrayIndex // index >= length, bail
% if wide:
ldr x0, [x0, #$data_offset] // x0<- vBB[vCC]
FETCH_ADVANCE_INST 2 // advance rPC, load rINST
SET_VREG_WIDE x0, w2
% elif is_object:
$load w0, [x0, #$data_offset] // w0<- vBB[vCC]
UNPOISON_HEAP_REF w0
// Shorten the handler by using the code from `op_iget_object` slow path.
% iget_opcode = re.sub ("op_aget" , "op_iget" , opcode)
TEST_IF_MARKING \
.L${iget_opcode}_slow_path_mark_and_store_r0_to_vreg_r2_fetch_advance_2_dispatch
FETCH_ADVANCE_INST 2 // advance rPC, load rINST
SET_VREG_OBJECT w0, w2 // vAA<- w0
% else:
$load w0, [x0, #$data_offset] // w0<- vBB[vCC]
FETCH_ADVANCE_INST 2 // advance rPC, load rINST
SET_VREG w0, w2 // vAA<- w0
% pass
#ifdef USE_HEAP_POISONING
% if is_object:
b .L${iget_opcode}_slow_path_dispatch // Dispatch would not fit in 64 B.
% else:
PREPARE_OPCODE_DISPATCH // insert opcode to xIBASE
GOTO_OPCODE // jump to next instruction
% pass
#else
PREPARE_OPCODE_DISPATCH // insert opcode to xIBASE
GOTO_OPCODE // jump to next instruction
#endif
% pass
%def op_aget_boolean():
% op_aget(load="ldrb" , shift=0 , data_offset="MIRROR_BOOLEAN_ARRAY_DATA_OFFSET" )
%def op_aget_byte():
% op_aget(load="ldrsb" , shift=0 , data_offset="MIRROR_BYTE_ARRAY_DATA_OFFSET" )
%def op_aget_char():
% op_aget(load="ldrh" , shift=1 , data_offset="MIRROR_CHAR_ARRAY_DATA_OFFSET" )
%def op_aget_object():
% op_aget(load="ldr" , shift=2 , data_offset="MIRROR_OBJECT_ARRAY_DATA_OFFSET" , is_object=True)
%def op_aget_short():
% op_aget(load="ldrsh" , shift=1 , data_offset="MIRROR_SHORT_ARRAY_DATA_OFFSET" )
%def op_aget_wide():
% op_aget(load="ldr" , shift=3 , data_offset="MIRROR_WIDE_ARRAY_DATA_OFFSET" , wide=True)
%def op_aput(store="str" , shift=2 , data_offset="MIRROR_INT_ARRAY_DATA_OFFSET" , wide=False, is_object=False):
/*
* Array put . vBB [ vCC ] < - vAA .
*
* for : aput , aput - boolean , aput - byte , aput - char , aput - short , aput - wide , aput - object
*
*/
FETCH_B w2, 1 , 0 // w2<- BB
lsr w9, wINST, #8 // w9<- AA
FETCH_B w3, 1 , 1 // w3<- CC
GET_VREG w0, w2 // w0<- vBB (array object)
GET_VREG w1, w3 // w1<- vCC (requested index)
// Note: if x0 is null, this will be handled by our SIGSEGV handler.
ldr w3, [x0, #MIRROR_ARRAY_LENGTH_OFFSET] // w3<- arrayObj->length
% if not is_object:
add x0, x0, w1, uxtw #$shift // w0<- arrayObj + index*width
cmp w1, w3 // compare unsigned index, length
bcs common_errArrayIndex // index >= length, bail
% if is_object:
EXPORT_PC // Export PC before overwriting it.
FETCH_ADVANCE_INST 2 // advance rPC, load rINST
% if wide:
GET_VREG_WIDE x2, w9 // x2<- vAA
% else:
GET_VREG w2, w9 // w2<- vAA
% if wide:
$store x2, [x0, #$data_offset] // vBB[vCC]<- x2
% elif is_object:
bl art_quick_aput_obj
% else:
$store w2, [x0, #$data_offset] // vBB[vCC]<- w2
PREPARE_OPCODE_DISPATCH // insert opcode to xIBASE
GOTO_OPCODE // jump to next instruction
%def op_aput_boolean():
% op_aput(store="strb" , shift=0 , data_offset="MIRROR_BOOLEAN_ARRAY_DATA_OFFSET" )
%def op_aput_byte():
% op_aput(store="strb" , shift=0 , data_offset="MIRROR_BYTE_ARRAY_DATA_OFFSET" )
%def op_aput_char():
% op_aput(store="strh" , shift=1 , data_offset="MIRROR_CHAR_ARRAY_DATA_OFFSET" )
%def op_aput_short():
% op_aput(store="strh" , shift=1 , data_offset="MIRROR_SHORT_ARRAY_DATA_OFFSET" )
%def op_aput_wide():
% op_aput(store="str" , shift=3 , data_offset="MIRROR_WIDE_ARRAY_DATA_OFFSET" , wide=True)
%def op_aput_object():
% op_aput(store="str" , shift=2 , data_offset="MIRROR_INT_ARRAY_DATA_OFFSET" , is_object=True)
%def op_array_length():
/*
* Return the length of an array .
*/
lsr w1, wINST, #12 // w1<- B
ubfx w2, wINST, #8 , #4 // w2<- A
GET_VREG w0, w1 // w0<- vB (object ref)
cbz w0, common_errNullObject // bail if null
FETCH_ADVANCE_INST 1 // advance rPC, load rINST
ldr w3, [x0, #MIRROR_ARRAY_LENGTH_OFFSET] // w3<- array length
PREPARE_OPCODE_DISPATCH // insert opcode to xIBASE
SET_VREG w3, w2 // vB<- length
GOTO_OPCODE // jump to next instruction
%def op_fill_array_data():
/* fill-array-data vAA, +BBBBBBBB */
EXPORT_PC
FETCH w0, 1 // x0<- 000000000000 bbbb (lo )
FETCH_S x1, 2 // x1<- ssssssssssssBBBB (hi )
lsr w3, wINST, #8 // w3<- AA
orr x0, x0, x1, lsl #16 // x0<- ssssssssBBBBbbbb
GET_VREG w1, w3 // w1<- vAA (array object)
add x0, xPC, x0, lsl #1 // x0<- PC + ssssssssBBBBbbbb*2 (array data off.)
bl art_quick_handle_fill_data
FETCH_ADVANCE_INST 3 // advance rPC, load rINST
PREPARE_OPCODE_DISPATCH // insert opcode to xIBASE
GOTO_OPCODE // jump to next instruction
%def op_filled_new_array(helper="nterp_filled_new_array" ):
/*
* Create a new array with elements filled from registers .
*
* for : filled - new - array , filled - new - array / range
*/
/* op vB, {vD, vE, vF, vG, vA}, class@CCCC */
/* op {vCCCC..v(CCCC+AA-1)}, type@BBBB */
EXPORT_PC
mov x0, xSELF
ldr x1, [sp]
mov x2, xFP
mov x3, xPC
bl $helper
FETCH_ADVANCE_INST 3 // advance rPC, load rINST
PREPARE_OPCODE_DISPATCH // insert opcode to xIBASE
GOTO_OPCODE // jump to next instruction
%def op_filled_new_array_range():
% op_filled_new_array(helper="nterp_filled_new_array_range" )
%def op_new_array():
% slow_path = add_slow_path(op_new_array_slow_path)
/* new-array vA, vB, class@CCCC */
EXPORT_PC
// Fast-path which gets the class from thread-local cache.
% fetch_from_thread_cache("x0" , miss_label=slow_path)
TEST_IF_MARKING .L${opcode}_slow_path_read_barrier
.L${opcode}_resume:
lsr w1, wINST, #12 // w1<- B
GET_VREG w1, w1 // w1<- vB (array length)
ldr lr, [xSELF, #THREAD_ALLOC_ARRAY_ENTRYPOINT_OFFSET]
blr lr
dmb ishst // need fence for making array's class visible
ubfx w2, wINST, #8 , #4 // w2<- A
// Shorten the handler by using the dispatch from `op_iget_object` slow path.
% iget_object_opcode = re.sub ("op_new_array" , "op_iget_object" , opcode)
b .L${iget_object_opcode}_slow_path_store_r0_to_vreg_r2_fetch_advance_2_dispatch
%def op_new_array_slow_path():
mov x0, xSELF
ldr x1, [sp, 0 ]
mov x2, xPC
bl nterp_get_class
b .L${opcode}_resume
.L${opcode}_slow_path_read_barrier:
bl art_quick_read_barrier_mark_reg00
b .L${opcode}_resume
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