< prev index next > src/hotspot/cpu/x86/c1_MacroAssembler_x86.cpp
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}
}
void C1_MacroAssembler::initialize_header(Register obj, Register klass, Register len, Register t1, Register t2) {
- assert_different_registers(obj, klass, len);
Register tmp_encode_klass = LP64_ONLY(rscratch1) NOT_LP64(noreg);
! // This assumes that all prototype bits fit in an int32_t
! movptr(Address(obj, oopDesc::mark_offset_in_bytes ()), (int32_t)(intptr_t)markWord::prototype().value());
! #ifdef _LP64
! if (UseCompressedClassPointers) { // Take care not to kill klass
! movptr(t1, klass);
- encode_klass_not_null(t1, tmp_encode_klass);
- movl(Address(obj, oopDesc::klass_offset_in_bytes()), t1);
- } else
#endif
- {
- movptr(Address(obj, oopDesc::klass_offset_in_bytes()), klass);
- }
if (len->is_valid()) {
movl(Address(obj, arrayOopDesc::length_offset_in_bytes()), len);
}
- #ifdef _LP64
- else if (UseCompressedClassPointers) {
- xorptr(t1, t1);
- store_klass_gap(obj, t1);
- }
- #endif
}
// preserves obj, destroys len_in_bytes
void C1_MacroAssembler::initialize_body(Register obj, Register len_in_bytes, int hdr_size_in_bytes, Register t1) {
}
}
void C1_MacroAssembler::initialize_header(Register obj, Register klass, Register len, Register t1, Register t2) {
Register tmp_encode_klass = LP64_ONLY(rscratch1) NOT_LP64(noreg);
! assert_different_registers(obj, klass, len, t1, t2);
! movptr(t1, Address(klass, Klass::prototype_header_offset()));
! movptr(Address(obj, oopDesc::mark_offset_in_bytes()), t1);
! #ifndef _LP64
! movptr(Address(obj, oopDesc::klass_offset_in_bytes()), klass);
#endif
if (len->is_valid()) {
movl(Address(obj, arrayOopDesc::length_offset_in_bytes()), len);
}
}
// preserves obj, destroys len_in_bytes
void C1_MacroAssembler::initialize_body(Register obj, Register len_in_bytes, int hdr_size_in_bytes, Register t1) {
}
verify_oop(obj);
}
! void C1_MacroAssembler::allocate_array(Register obj, Register len, Register t1, Register t2, int header_size, Address::ScaleFactor f, Register klass, Label& slow_case) {
assert(obj == rax, "obj must be in rax, for cmpxchg");
assert_different_registers(obj, len, t1, t2, klass);
// determine alignment mask
assert(!(BytesPerWord & 1), "must be a multiple of 2 for masking code to work");
}
verify_oop(obj);
}
! void C1_MacroAssembler::allocate_array(Register obj, Register len, Register t1, Register t2, int base_offset_in_bytes, Address::ScaleFactor f, Register klass, Label& slow_case) {
assert(obj == rax, "obj must be in rax, for cmpxchg");
assert_different_registers(obj, len, t1, t2, klass);
// determine alignment mask
assert(!(BytesPerWord & 1), "must be a multiple of 2 for masking code to work");
cmpptr(len, (int32_t)max_array_allocation_length);
jcc(Assembler::above, slow_case);
const Register arr_size = t2; // okay to be the same
// align object end
! movptr(arr_size, (int32_t)header_size * BytesPerWord + MinObjAlignmentInBytesMask);
lea(arr_size, Address(arr_size, len, f));
andptr(arr_size, ~MinObjAlignmentInBytesMask);
try_allocate(obj, arr_size, 0, t1, t2, slow_case);
initialize_header(obj, klass, len, t1, t2);
// clear rest of allocated space
const Register len_zero = len;
! initialize_body(obj, arr_size, header_size * BytesPerWord, len_zero);
if (CURRENT_ENV->dtrace_alloc_probes()) {
assert(obj == rax, "must be");
call(RuntimeAddress(Runtime1::entry_for(Runtime1::dtrace_object_alloc_id)));
}
cmpptr(len, (int32_t)max_array_allocation_length);
jcc(Assembler::above, slow_case);
const Register arr_size = t2; // okay to be the same
// align object end
! movptr(arr_size, (int32_t)base_offset_in_bytes + MinObjAlignmentInBytesMask);
lea(arr_size, Address(arr_size, len, f));
andptr(arr_size, ~MinObjAlignmentInBytesMask);
try_allocate(obj, arr_size, 0, t1, t2, slow_case);
initialize_header(obj, klass, len, t1, t2);
// clear rest of allocated space
const Register len_zero = len;
! initialize_body(obj, arr_size, base_offset_in_bytes, len_zero);
if (CURRENT_ENV->dtrace_alloc_probes()) {
assert(obj == rax, "must be");
call(RuntimeAddress(Runtime1::entry_for(Runtime1::dtrace_object_alloc_id)));
}
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