< prev index next > src/hotspot/cpu/x86/gc/g1/g1BarrierSetAssembler_x86.cpp
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__ jcc(Assembler::equal, done);
// Can we store original value in the thread's buffer?
// Is index == 0?
// (The index field is typed as size_t.)
-
__ movptr(tmp, index); // tmp := *index_adr
__ cmpptr(tmp, 0); // tmp == 0?
__ jcc(Assembler::equal, runtime); // If yes, goto runtime
__ subptr(tmp, wordSize); // tmp := tmp - wordSize
__ movptr(Address(tmp, 0), pre_val);
__ jmp(done);
__ bind(runtime);
! // Determine and save the live input values
! __ push_call_clobbered_registers();
// Calling the runtime using the regular call_VM_leaf mechanism generates
// code (generated by InterpreterMacroAssember::call_VM_leaf_base)
// that checks that the *(ebp+frame::interpreter_frame_last_sp) == nullptr.
//
__ movptr(Address(tmp, 0), pre_val);
__ jmp(done);
__ bind(runtime);
! if (EnableValhalla && InlineTypePassFieldsAsArgs) {
! // Barriers might be emitted when converting between (scalarized) calling conventions for inline
+ // types. Save all argument registers before calling into the runtime.
+ // TODO: use push_set() (see JDK-8283327 push/pop_call_clobbered_registers & aarch64 )
+ __ pusha();
+ __ subptr(rsp, 64);
+ __ movdbl(Address(rsp, 0), j_farg0);
+ __ movdbl(Address(rsp, 8), j_farg1);
+ __ movdbl(Address(rsp, 16), j_farg2);
+ __ movdbl(Address(rsp, 24), j_farg3);
+ __ movdbl(Address(rsp, 32), j_farg4);
+ __ movdbl(Address(rsp, 40), j_farg5);
+ __ movdbl(Address(rsp, 48), j_farg6);
+ __ movdbl(Address(rsp, 56), j_farg7);
+ } else {
+ // Determine and save the live input values
+ __ push_call_clobbered_registers();
+ }
// Calling the runtime using the regular call_VM_leaf mechanism generates
// code (generated by InterpreterMacroAssember::call_VM_leaf_base)
// that checks that the *(ebp+frame::interpreter_frame_last_sp) == nullptr.
//
__ MacroAssembler::call_VM_leaf_base(CAST_FROM_FN_PTR(address, G1BarrierSetRuntime::write_ref_field_pre_entry), 2);
} else {
__ call_VM_leaf(CAST_FROM_FN_PTR(address, G1BarrierSetRuntime::write_ref_field_pre_entry), pre_val, thread);
}
! __ pop_call_clobbered_registers();
__ bind(done);
}
void G1BarrierSetAssembler::g1_write_barrier_post(MacroAssembler* masm,
__ MacroAssembler::call_VM_leaf_base(CAST_FROM_FN_PTR(address, G1BarrierSetRuntime::write_ref_field_pre_entry), 2);
} else {
__ call_VM_leaf(CAST_FROM_FN_PTR(address, G1BarrierSetRuntime::write_ref_field_pre_entry), pre_val, thread);
}
! if (EnableValhalla && InlineTypePassFieldsAsArgs) {
+ // Restore registers
+ __ movdbl(j_farg0, Address(rsp, 0));
+ __ movdbl(j_farg1, Address(rsp, 8));
+ __ movdbl(j_farg2, Address(rsp, 16));
+ __ movdbl(j_farg3, Address(rsp, 24));
+ __ movdbl(j_farg4, Address(rsp, 32));
+ __ movdbl(j_farg5, Address(rsp, 40));
+ __ movdbl(j_farg6, Address(rsp, 48));
+ __ movdbl(j_farg7, Address(rsp, 56));
+ __ addptr(rsp, 64);
+ __ popa();
+ } else {
+ __ pop_call_clobbered_registers();
+ }
__ bind(done);
}
void G1BarrierSetAssembler::g1_write_barrier_post(MacroAssembler* masm,
__ addptr(tmp2, buffer);
__ movptr(Address(tmp2, 0), card_addr);
__ jmp(done);
__ bind(runtime);
! // save the live input values
! RegSet saved = RegSet::of(store_addr NOT_LP64(COMMA thread));
! __ push_set(saved);
__ call_VM_leaf(CAST_FROM_FN_PTR(address, G1BarrierSetRuntime::write_ref_field_post_entry), card_addr, thread);
! __ pop_set(saved);
__ bind(done);
}
void G1BarrierSetAssembler::oop_store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
Address dst, Register val, Register tmp1, Register tmp2, Register tmp3) {
bool in_heap = (decorators & IN_HEAP) != 0;
bool as_normal = (decorators & AS_NORMAL) != 0;
! bool needs_pre_barrier = as_normal;
bool needs_post_barrier = val != noreg && in_heap;
Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
// flatten object address if needed
// We do it regardless of precise because we need the registers
__ addptr(tmp2, buffer);
__ movptr(Address(tmp2, 0), card_addr);
__ jmp(done);
__ bind(runtime);
! // Barriers might be emitted when converting between (scalarized) calling conventions for inline
! // types. Save all argument registers before calling into the runtime.
! // TODO: use push_set() (see JDK-8283327 push/pop_call_clobbered_registers & aarch64)
+ __ pusha();
+ __ subptr(rsp, 64);
+ __ movdbl(Address(rsp, 0), j_farg0);
+ __ movdbl(Address(rsp, 8), j_farg1);
+ __ movdbl(Address(rsp, 16), j_farg2);
+ __ movdbl(Address(rsp, 24), j_farg3);
+ __ movdbl(Address(rsp, 32), j_farg4);
+ __ movdbl(Address(rsp, 40), j_farg5);
+ __ movdbl(Address(rsp, 48), j_farg6);
+ __ movdbl(Address(rsp, 56), j_farg7);
+
+ #ifdef _LP64
+ __ call_VM_leaf(CAST_FROM_FN_PTR(address, G1BarrierSetRuntime::write_ref_field_post_entry), card_addr, r15_thread);
+ #else
+ __ push(thread);
__ call_VM_leaf(CAST_FROM_FN_PTR(address, G1BarrierSetRuntime::write_ref_field_post_entry), card_addr, thread);
! __ pop(thread);
+ #endif
+
+ // Restore registers
+ __ movdbl(j_farg0, Address(rsp, 0));
+ __ movdbl(j_farg1, Address(rsp, 8));
+ __ movdbl(j_farg2, Address(rsp, 16));
+ __ movdbl(j_farg3, Address(rsp, 24));
+ __ movdbl(j_farg4, Address(rsp, 32));
+ __ movdbl(j_farg5, Address(rsp, 40));
+ __ movdbl(j_farg6, Address(rsp, 48));
+ __ movdbl(j_farg7, Address(rsp, 56));
+ __ addptr(rsp, 64);
+ __ popa();
__ bind(done);
}
void G1BarrierSetAssembler::oop_store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
Address dst, Register val, Register tmp1, Register tmp2, Register tmp3) {
bool in_heap = (decorators & IN_HEAP) != 0;
bool as_normal = (decorators & AS_NORMAL) != 0;
+ bool dest_uninitialized = (decorators & IS_DEST_UNINITIALIZED) != 0;
! bool needs_pre_barrier = as_normal && !dest_uninitialized;
bool needs_post_barrier = val != noreg && in_heap;
Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
// flatten object address if needed
// We do it regardless of precise because we need the registers
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