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%def op_aget(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 r2, 1, 0 @ r2<- BB
mov r9, rINST, lsr #8 @ r9<- AA
FETCH_B r3, 1, 1 @ r3<- CC
GET_VREG r0, r2 @ r0<- vBB (array object)
GET_VREG r1, r3 @ r1<- vCC (requested index)
cmp r0, #0 @ null array object?
beq common_errNullObject @ yes, bail
ldr r3, [r0, #MIRROR_ARRAY_LENGTH_OFFSET] @ r3<- arrayObj->length
add r0, r0, r1, lsl #$shift @ r0<- arrayObj + index*width
cmp r1, r3 @ compare unsigned index, length
bcs common_errArrayIndex @ index >= length, bail
FETCH_ADVANCE_INST 2 @ advance rPC, load rINST
$load r2, [r0, #$data_offset] @ r2<- vBB[vCC]
GET_INST_OPCODE ip @ extract opcode from rINST
SET_VREG r2, r9 @ vAA<- r2
GOTO_OPCODE ip @ jump to next instruction
%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():
/*
* Array object get. vAA <- vBB[vCC].
*
* for: aget-object
*/
/* op vAA, vBB, vCC */
FETCH_B r2, 1, 0 @ r2<- BB
mov r9, rINST, lsr #8 @ r9<- AA
FETCH_B r3, 1, 1 @ r3<- CC
EXPORT_PC
GET_VREG r0, r2 @ r0<- vBB (array object)
GET_VREG r1, r3 @ r1<- vCC (requested index)
bl artAGetObjectFromMterp @ (array, index)
ldr r1, [rSELF, #THREAD_EXCEPTION_OFFSET]
PREFETCH_INST 2
cmp r1, #0
bne MterpException
SET_VREG_OBJECT r0, r9
ADVANCE 2
GET_INST_OPCODE ip
GOTO_OPCODE ip @ jump to next instruction
%def op_aget_short():
% op_aget(load="ldrsh", shift="1", data_offset="MIRROR_SHORT_ARRAY_DATA_OFFSET")
%def op_aget_wide():
/*
* Array get, 64 bits. vAA <- vBB[vCC].
*
* Arrays of long/double are 64-bit aligned, so it's okay to use LDRD.
*/
/* aget-wide vAA, vBB, vCC */
FETCH r0, 1 @ r0<- CCBB
mov r9, rINST, lsr #8 @ r9<- AA
and r2, r0, #255 @ r2<- BB
mov r3, r0, lsr #8 @ r3<- CC
GET_VREG r0, r2 @ r0<- vBB (array object)
GET_VREG r1, r3 @ r1<- vCC (requested index)
cmp r0, #0 @ null array object?
beq common_errNullObject @ yes, bail
ldr r3, [r0, #MIRROR_ARRAY_LENGTH_OFFSET] @ r3<- arrayObj->length
add r0, r0, r1, lsl #3 @ r0<- arrayObj + index*width
cmp r1, r3 @ compare unsigned index, length
bcs common_errArrayIndex @ index >= length, bail
FETCH_ADVANCE_INST 2 @ advance rPC, load rINST
CLEAR_SHADOW_PAIR r9, lr, ip @ Zero out the shadow regs
ldrd r2, [r0, #MIRROR_WIDE_ARRAY_DATA_OFFSET] @ r2/r3<- vBB[vCC]
VREG_INDEX_TO_ADDR r9, r9 @ r9<- &fp[AA]
GET_INST_OPCODE ip @ extract opcode from rINST
SET_VREG_WIDE_BY_ADDR r2, r3, r9 @ vAA/vAA+1<- r2/r3
GOTO_OPCODE ip @ jump to next instruction
%def op_aput(store="str", shift="2", data_offset="MIRROR_INT_ARRAY_DATA_OFFSET"):
/*
* Array put, 32 bits or less. vBB[vCC] <- vAA.
*
* Note: using the usual FETCH/and/shift stuff, this fits in exactly 17
* instructions. We use a pair of FETCH_Bs instead.
*
* for: aput, aput-boolean, aput-byte, aput-char, aput-short
*
* NOTE: this assumes data offset for arrays is the same for all non-wide types.
* If this changes, specialize.
*/
/* op vAA, vBB, vCC */
FETCH_B r2, 1, 0 @ r2<- BB
mov r9, rINST, lsr #8 @ r9<- AA
FETCH_B r3, 1, 1 @ r3<- CC
GET_VREG r0, r2 @ r0<- vBB (array object)
GET_VREG r1, r3 @ r1<- vCC (requested index)
cmp r0, #0 @ null array object?
beq common_errNullObject @ yes, bail
ldr r3, [r0, #MIRROR_ARRAY_LENGTH_OFFSET] @ r3<- arrayObj->length
add r0, r0, r1, lsl #$shift @ r0<- arrayObj + index*width
cmp r1, r3 @ compare unsigned index, length
bcs common_errArrayIndex @ index >= length, bail
FETCH_ADVANCE_INST 2 @ advance rPC, load rINST
GET_VREG r2, r9 @ r2<- vAA
GET_INST_OPCODE ip @ extract opcode from rINST
$store r2, [r0, #$data_offset] @ vBB[vCC]<- r2
GOTO_OPCODE ip @ 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_object():
/*
* Store an object into an array. vBB[vCC] <- vAA.
*/
/* op vAA, vBB, vCC */
EXPORT_PC
add r0, rFP, #OFF_FP_SHADOWFRAME
mov r1, rPC
mov r2, rINST
bl MterpAputObject
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_aput_short():
% op_aput(store="strh", shift="1", data_offset="MIRROR_SHORT_ARRAY_DATA_OFFSET")
%def op_aput_wide():
/*
* Array put, 64 bits. vBB[vCC] <- vAA.
*
* Arrays of long/double are 64-bit aligned, so it's okay to use STRD.
*/
/* aput-wide vAA, vBB, vCC */
FETCH r0, 1 @ r0<- CCBB
mov r9, rINST, lsr #8 @ r9<- AA
and r2, r0, #255 @ r2<- BB
mov r3, r0, lsr #8 @ r3<- CC
GET_VREG r0, r2 @ r0<- vBB (array object)
GET_VREG r1, r3 @ r1<- vCC (requested index)
cmp r0, #0 @ null array object?
beq common_errNullObject @ yes, bail
ldr r3, [r0, #MIRROR_ARRAY_LENGTH_OFFSET] @ r3<- arrayObj->length
add r0, r0, r1, lsl #3 @ r0<- arrayObj + index*width
cmp r1, r3 @ compare unsigned index, length
VREG_INDEX_TO_ADDR r9, r9 @ r9<- &fp[AA]
bcs common_errArrayIndex @ index >= length, bail
FETCH_ADVANCE_INST 2 @ advance rPC, load rINST
GET_VREG_WIDE_BY_ADDR r2, r3, r9 @ r2/r3<- vAA/vAA+1
GET_INST_OPCODE ip @ extract opcode from rINST
strd r2, [r0, #MIRROR_WIDE_ARRAY_DATA_OFFSET] @ r2/r3<- vBB[vCC]
GOTO_OPCODE ip @ jump to next instruction
%def op_array_length():
/*
* Return the length of an array.
*/
mov r1, rINST, lsr #12 @ r1<- B
ubfx r2, rINST, #8, #4 @ r2<- A
GET_VREG r0, r1 @ r0<- vB (object ref)
cmp r0, #0 @ is object null?
beq common_errNullObject @ yup, fail
FETCH_ADVANCE_INST 1 @ advance rPC, load rINST
ldr r3, [r0, #MIRROR_ARRAY_LENGTH_OFFSET] @ r3<- array length
GET_INST_OPCODE ip @ extract opcode from rINST
SET_VREG r3, r2 @ vB<- length
GOTO_OPCODE ip @ jump to next instruction
%def op_fill_array_data():
/* fill-array-data vAA, +BBBBBBBB */
EXPORT_PC
FETCH r0, 1 @ r0<- bbbb (lo)
FETCH r1, 2 @ r1<- BBBB (hi)
mov r3, rINST, lsr #8 @ r3<- AA
orr r1, r0, r1, lsl #16 @ r1<- BBBBbbbb
GET_VREG r0, r3 @ r0<- vAA (array object)
add r1, rPC, r1, lsl #1 @ r1<- PC + BBBBbbbb*2 (array data off.)
bl MterpFillArrayData @ (obj, payload)
cmp r0, #0 @ 0 means an exception is thrown
beq MterpPossibleException @ exception?
FETCH_ADVANCE_INST 3 @ advance rPC, load rINST
GET_INST_OPCODE ip @ extract opcode from rINST
GOTO_OPCODE ip @ jump to next instruction
%def op_filled_new_array(helper="MterpFilledNewArray"):
/*
* 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 */
.extern $helper
EXPORT_PC
add r0, rFP, #OFF_FP_SHADOWFRAME
mov r1, rPC
mov r2, rSELF
bl $helper
cmp r0, #0
beq MterpPossibleException
FETCH_ADVANCE_INST 3 @ advance rPC, load rINST
GET_INST_OPCODE ip @ extract opcode from rINST
GOTO_OPCODE ip @ jump to next instruction
%def op_filled_new_array_range():
% op_filled_new_array(helper="MterpFilledNewArrayRange")
%def op_new_array():
/*
* Allocate an array of objects, specified with the array class
* and a count.
*
* The verifier guarantees that this is an array class, so we don't
* check for it here.
*/
/* new-array vA, vB, class@CCCC */
EXPORT_PC
add r0, rFP, #OFF_FP_SHADOWFRAME
mov r1, rPC
mov r2, rINST
mov r3, rSELF
bl MterpNewArray
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
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