7063628: Use cbcond on T4
Summary: Add new short branch instruction to Hotspot sparc assembler.
Reviewed-by: never, twisti, jrose
/*
* Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "precompiled.hpp"
#include "asm/assembler.hpp"
#include "assembler_sparc.inline.hpp"
#include "interpreter/interpreter.hpp"
#include "nativeInst_sparc.hpp"
#include "oops/instanceOop.hpp"
#include "oops/methodOop.hpp"
#include "oops/objArrayKlass.hpp"
#include "oops/oop.inline.hpp"
#include "prims/methodHandles.hpp"
#include "runtime/frame.inline.hpp"
#include "runtime/handles.inline.hpp"
#include "runtime/sharedRuntime.hpp"
#include "runtime/stubCodeGenerator.hpp"
#include "runtime/stubRoutines.hpp"
#include "utilities/top.hpp"
#ifdef TARGET_OS_FAMILY_linux
# include "thread_linux.inline.hpp"
#endif
#ifdef TARGET_OS_FAMILY_solaris
# include "thread_solaris.inline.hpp"
#endif
#ifdef COMPILER2
#include "opto/runtime.hpp"
#endif
// Declaration and definition of StubGenerator (no .hpp file).
// For a more detailed description of the stub routine structure
// see the comment in stubRoutines.hpp.
#define __ _masm->
#ifdef PRODUCT
#define BLOCK_COMMENT(str) /* nothing */
#else
#define BLOCK_COMMENT(str) __ block_comment(str)
#endif
#define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
// Note: The register L7 is used as L7_thread_cache, and may not be used
// any other way within this module.
static const Register& Lstub_temp = L2;
// -------------------------------------------------------------------------------------------------------------------------
// Stub Code definitions
static address handle_unsafe_access() {
JavaThread* thread = JavaThread::current();
address pc = thread->saved_exception_pc();
address npc = thread->saved_exception_npc();
// pc is the instruction which we must emulate
// doing a no-op is fine: return garbage from the load
// request an async exception
thread->set_pending_unsafe_access_error();
// return address of next instruction to execute
return npc;
}
class StubGenerator: public StubCodeGenerator {
private:
#ifdef PRODUCT
#define inc_counter_np(a,b,c) (0)
#else
#define inc_counter_np(counter, t1, t2) \
BLOCK_COMMENT("inc_counter " #counter); \
__ inc_counter(&counter, t1, t2);
#endif
//----------------------------------------------------------------------------------------------------
// Call stubs are used to call Java from C
address generate_call_stub(address& return_pc) {
StubCodeMark mark(this, "StubRoutines", "call_stub");
address start = __ pc();
// Incoming arguments:
//
// o0 : call wrapper address
// o1 : result (address)
// o2 : result type
// o3 : method
// o4 : (interpreter) entry point
// o5 : parameters (address)
// [sp + 0x5c]: parameter size (in words)
// [sp + 0x60]: thread
//
// +---------------+ <--- sp + 0
// | |
// . reg save area .
// | |
// +---------------+ <--- sp + 0x40
// | |
// . extra 7 slots .
// | |
// +---------------+ <--- sp + 0x5c
// | param. size |
// +---------------+ <--- sp + 0x60
// | thread |
// +---------------+
// | |
// note: if the link argument position changes, adjust
// the code in frame::entry_frame_call_wrapper()
const Argument link = Argument(0, false); // used only for GC
const Argument result = Argument(1, false);
const Argument result_type = Argument(2, false);
const Argument method = Argument(3, false);
const Argument entry_point = Argument(4, false);
const Argument parameters = Argument(5, false);
const Argument parameter_size = Argument(6, false);
const Argument thread = Argument(7, false);
// setup thread register
__ ld_ptr(thread.as_address(), G2_thread);
__ reinit_heapbase();
#ifdef ASSERT
// make sure we have no pending exceptions
{ const Register t = G3_scratch;
Label L;
__ ld_ptr(G2_thread, in_bytes(Thread::pending_exception_offset()), t);
__ br_null_short(t, Assembler::pt, L);
__ stop("StubRoutines::call_stub: entered with pending exception");
__ bind(L);
}
#endif
// create activation frame & allocate space for parameters
{ const Register t = G3_scratch;
__ ld_ptr(parameter_size.as_address(), t); // get parameter size (in words)
__ add(t, frame::memory_parameter_word_sp_offset, t); // add space for save area (in words)
__ round_to(t, WordsPerLong); // make sure it is multiple of 2 (in words)
__ sll(t, Interpreter::logStackElementSize, t); // compute number of bytes
__ neg(t); // negate so it can be used with save
__ save(SP, t, SP); // setup new frame
}
// +---------------+ <--- sp + 0
// | |
// . reg save area .
// | |
// +---------------+ <--- sp + 0x40
// | |
// . extra 7 slots .
// | |
// +---------------+ <--- sp + 0x5c
// | empty slot | (only if parameter size is even)
// +---------------+
// | |
// . parameters .
// | |
// +---------------+ <--- fp + 0
// | |
// . reg save area .
// | |
// +---------------+ <--- fp + 0x40
// | |
// . extra 7 slots .
// | |
// +---------------+ <--- fp + 0x5c
// | param. size |
// +---------------+ <--- fp + 0x60
// | thread |
// +---------------+
// | |
// pass parameters if any
BLOCK_COMMENT("pass parameters if any");
{ const Register src = parameters.as_in().as_register();
const Register dst = Lentry_args;
const Register tmp = G3_scratch;
const Register cnt = G4_scratch;
// test if any parameters & setup of Lentry_args
Label exit;
__ ld_ptr(parameter_size.as_in().as_address(), cnt); // parameter counter
__ add( FP, STACK_BIAS, dst );
__ cmp_zero_and_br(Assembler::zero, cnt, exit);
__ delayed()->sub(dst, BytesPerWord, dst); // setup Lentry_args
// copy parameters if any
Label loop;
__ BIND(loop);
// Store parameter value
__ ld_ptr(src, 0, tmp);
__ add(src, BytesPerWord, src);
__ st_ptr(tmp, dst, 0);
__ deccc(cnt);
__ br(Assembler::greater, false, Assembler::pt, loop);
__ delayed()->sub(dst, Interpreter::stackElementSize, dst);
// done
__ BIND(exit);
}
// setup parameters, method & call Java function
#ifdef ASSERT
// layout_activation_impl checks it's notion of saved SP against
// this register, so if this changes update it as well.
const Register saved_SP = Lscratch;
__ mov(SP, saved_SP); // keep track of SP before call
#endif
// setup parameters
const Register t = G3_scratch;
__ ld_ptr(parameter_size.as_in().as_address(), t); // get parameter size (in words)
__ sll(t, Interpreter::logStackElementSize, t); // compute number of bytes
__ sub(FP, t, Gargs); // setup parameter pointer
#ifdef _LP64
__ add( Gargs, STACK_BIAS, Gargs ); // Account for LP64 stack bias
#endif
__ mov(SP, O5_savedSP);
// do the call
//
// the following register must be setup:
//
// G2_thread
// G5_method
// Gargs
BLOCK_COMMENT("call Java function");
__ jmpl(entry_point.as_in().as_register(), G0, O7);
__ delayed()->mov(method.as_in().as_register(), G5_method); // setup method
BLOCK_COMMENT("call_stub_return_address:");
return_pc = __ pc();
// The callee, if it wasn't interpreted, can return with SP changed so
// we can no longer assert of change of SP.
// store result depending on type
// (everything that is not T_OBJECT, T_LONG, T_FLOAT, or T_DOUBLE
// is treated as T_INT)
{ const Register addr = result .as_in().as_register();
const Register type = result_type.as_in().as_register();
Label is_long, is_float, is_double, is_object, exit;
__ cmp(type, T_OBJECT); __ br(Assembler::equal, false, Assembler::pn, is_object);
__ delayed()->cmp(type, T_FLOAT); __ br(Assembler::equal, false, Assembler::pn, is_float);
__ delayed()->cmp(type, T_DOUBLE); __ br(Assembler::equal, false, Assembler::pn, is_double);
__ delayed()->cmp(type, T_LONG); __ br(Assembler::equal, false, Assembler::pn, is_long);
__ delayed()->nop();
// store int result
__ st(O0, addr, G0);
__ BIND(exit);
__ ret();
__ delayed()->restore();
__ BIND(is_object);
__ ba(exit);
__ delayed()->st_ptr(O0, addr, G0);
__ BIND(is_float);
__ ba(exit);
__ delayed()->stf(FloatRegisterImpl::S, F0, addr, G0);
__ BIND(is_double);
__ ba(exit);
__ delayed()->stf(FloatRegisterImpl::D, F0, addr, G0);
__ BIND(is_long);
#ifdef _LP64
__ ba(exit);
__ delayed()->st_long(O0, addr, G0); // store entire long
#else
#if defined(COMPILER2)
// All return values are where we want them, except for Longs. C2 returns
// longs in G1 in the 32-bit build whereas the interpreter wants them in O0/O1.
// Since the interpreter will return longs in G1 and O0/O1 in the 32bit
// build we simply always use G1.
// Note: I tried to make c2 return longs in O0/O1 and G1 so we wouldn't have to
// do this here. Unfortunately if we did a rethrow we'd see an machepilog node
// first which would move g1 -> O0/O1 and destroy the exception we were throwing.
__ ba(exit);
__ delayed()->stx(G1, addr, G0); // store entire long
#else
__ st(O1, addr, BytesPerInt);
__ ba(exit);
__ delayed()->st(O0, addr, G0);
#endif /* COMPILER2 */
#endif /* _LP64 */
}
return start;
}
//----------------------------------------------------------------------------------------------------
// Return point for a Java call if there's an exception thrown in Java code.
// The exception is caught and transformed into a pending exception stored in
// JavaThread that can be tested from within the VM.
//
// Oexception: exception oop
address generate_catch_exception() {
StubCodeMark mark(this, "StubRoutines", "catch_exception");
address start = __ pc();
// verify that thread corresponds
__ verify_thread();
const Register& temp_reg = Gtemp;
Address pending_exception_addr (G2_thread, Thread::pending_exception_offset());
Address exception_file_offset_addr(G2_thread, Thread::exception_file_offset ());
Address exception_line_offset_addr(G2_thread, Thread::exception_line_offset ());
// set pending exception
__ verify_oop(Oexception);
__ st_ptr(Oexception, pending_exception_addr);
__ set((intptr_t)__FILE__, temp_reg);
__ st_ptr(temp_reg, exception_file_offset_addr);
__ set((intptr_t)__LINE__, temp_reg);
__ st(temp_reg, exception_line_offset_addr);
// complete return to VM
assert(StubRoutines::_call_stub_return_address != NULL, "must have been generated before");
AddressLiteral stub_ret(StubRoutines::_call_stub_return_address);
__ jump_to(stub_ret, temp_reg);
__ delayed()->nop();
return start;
}
//----------------------------------------------------------------------------------------------------
// Continuation point for runtime calls returning with a pending exception
// The pending exception check happened in the runtime or native call stub
// The pending exception in Thread is converted into a Java-level exception
//
// Contract with Java-level exception handler: O0 = exception
// O1 = throwing pc
address generate_forward_exception() {
StubCodeMark mark(this, "StubRoutines", "forward_exception");
address start = __ pc();
// Upon entry, O7 has the return address returning into Java
// (interpreted or compiled) code; i.e. the return address
// becomes the throwing pc.
const Register& handler_reg = Gtemp;
Address exception_addr(G2_thread, Thread::pending_exception_offset());
#ifdef ASSERT
// make sure that this code is only executed if there is a pending exception
{ Label L;
__ ld_ptr(exception_addr, Gtemp);
__ br_notnull_short(Gtemp, Assembler::pt, L);
__ stop("StubRoutines::forward exception: no pending exception (1)");
__ bind(L);
}
#endif
// compute exception handler into handler_reg
__ get_thread();
__ ld_ptr(exception_addr, Oexception);
__ verify_oop(Oexception);
__ save_frame(0); // compensates for compiler weakness
__ add(O7->after_save(), frame::pc_return_offset, Lscratch); // save the issuing PC
BLOCK_COMMENT("call exception_handler_for_return_address");
__ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), G2_thread, Lscratch);
__ mov(O0, handler_reg);
__ restore(); // compensates for compiler weakness
__ ld_ptr(exception_addr, Oexception);
__ add(O7, frame::pc_return_offset, Oissuing_pc); // save the issuing PC
#ifdef ASSERT
// make sure exception is set
{ Label L;
__ br_notnull_short(Oexception, Assembler::pt, L);
__ stop("StubRoutines::forward exception: no pending exception (2)");
__ bind(L);
}
#endif
// jump to exception handler
__ jmp(handler_reg, 0);
// clear pending exception
__ delayed()->st_ptr(G0, exception_addr);
return start;
}
//------------------------------------------------------------------------------------------------------------------------
// Continuation point for throwing of implicit exceptions that are not handled in
// the current activation. Fabricates an exception oop and initiates normal
// exception dispatching in this frame. Only callee-saved registers are preserved
// (through the normal register window / RegisterMap handling).
// If the compiler needs all registers to be preserved between the fault
// point and the exception handler then it must assume responsibility for that in
// AbstractCompiler::continuation_for_implicit_null_exception or
// continuation_for_implicit_division_by_zero_exception. All other implicit
// exceptions (e.g., NullPointerException or AbstractMethodError on entry) are
// either at call sites or otherwise assume that stack unwinding will be initiated,
// so caller saved registers were assumed volatile in the compiler.
// Note that we generate only this stub into a RuntimeStub, because it needs to be
// properly traversed and ignored during GC, so we change the meaning of the "__"
// macro within this method.
#undef __
#define __ masm->
address generate_throw_exception(const char* name, address runtime_entry, bool restore_saved_exception_pc,
Register arg1 = noreg, Register arg2 = noreg) {
#ifdef ASSERT
int insts_size = VerifyThread ? 1 * K : 600;
#else
int insts_size = VerifyThread ? 1 * K : 256;
#endif /* ASSERT */
int locs_size = 32;
CodeBuffer code(name, insts_size, locs_size);
MacroAssembler* masm = new MacroAssembler(&code);
__ verify_thread();
// This is an inlined and slightly modified version of call_VM
// which has the ability to fetch the return PC out of thread-local storage
__ assert_not_delayed();
// Note that we always push a frame because on the SPARC
// architecture, for all of our implicit exception kinds at call
// sites, the implicit exception is taken before the callee frame
// is pushed.
__ save_frame(0);
int frame_complete = __ offset();
if (restore_saved_exception_pc) {
__ ld_ptr(G2_thread, JavaThread::saved_exception_pc_offset(), I7);
__ sub(I7, frame::pc_return_offset, I7);
}
// Note that we always have a runtime stub frame on the top of stack by this point
Register last_java_sp = SP;
// 64-bit last_java_sp is biased!
__ set_last_Java_frame(last_java_sp, G0);
if (VerifyThread) __ mov(G2_thread, O0); // about to be smashed; pass early
__ save_thread(noreg);
if (arg1 != noreg) {
assert(arg2 != O1, "clobbered");
__ mov(arg1, O1);
}
if (arg2 != noreg) {
__ mov(arg2, O2);
}
// do the call
BLOCK_COMMENT("call runtime_entry");
__ call(runtime_entry, relocInfo::runtime_call_type);
if (!VerifyThread)
__ delayed()->mov(G2_thread, O0); // pass thread as first argument
else
__ delayed()->nop(); // (thread already passed)
__ restore_thread(noreg);
__ reset_last_Java_frame();
// check for pending exceptions. use Gtemp as scratch register.
#ifdef ASSERT
Label L;
Address exception_addr(G2_thread, Thread::pending_exception_offset());
Register scratch_reg = Gtemp;
__ ld_ptr(exception_addr, scratch_reg);
__ br_notnull_short(scratch_reg, Assembler::pt, L);
__ should_not_reach_here();
__ bind(L);
#endif // ASSERT
BLOCK_COMMENT("call forward_exception_entry");
__ call(StubRoutines::forward_exception_entry(), relocInfo::runtime_call_type);
// we use O7 linkage so that forward_exception_entry has the issuing PC
__ delayed()->restore();
RuntimeStub* stub = RuntimeStub::new_runtime_stub(name, &code, frame_complete, masm->total_frame_size_in_bytes(0), NULL, false);
return stub->entry_point();
}
#undef __
#define __ _masm->
// Generate a routine that sets all the registers so we
// can tell if the stop routine prints them correctly.
address generate_test_stop() {
StubCodeMark mark(this, "StubRoutines", "test_stop");
address start = __ pc();
int i;
__ save_frame(0);
static jfloat zero = 0.0, one = 1.0;
// put addr in L0, then load through L0 to F0
__ set((intptr_t)&zero, L0); __ ldf( FloatRegisterImpl::S, L0, 0, F0);
__ set((intptr_t)&one, L0); __ ldf( FloatRegisterImpl::S, L0, 0, F1); // 1.0 to F1
// use add to put 2..18 in F2..F18
for ( i = 2; i <= 18; ++i ) {
__ fadd( FloatRegisterImpl::S, F1, as_FloatRegister(i-1), as_FloatRegister(i));
}
// Now put double 2 in F16, double 18 in F18
__ ftof( FloatRegisterImpl::S, FloatRegisterImpl::D, F2, F16 );
__ ftof( FloatRegisterImpl::S, FloatRegisterImpl::D, F18, F18 );
// use add to put 20..32 in F20..F32
for (i = 20; i < 32; i += 2) {
__ fadd( FloatRegisterImpl::D, F16, as_FloatRegister(i-2), as_FloatRegister(i));
}
// put 0..7 in i's, 8..15 in l's, 16..23 in o's, 24..31 in g's
for ( i = 0; i < 8; ++i ) {
if (i < 6) {
__ set( i, as_iRegister(i));
__ set(16 + i, as_oRegister(i));
__ set(24 + i, as_gRegister(i));
}
__ set( 8 + i, as_lRegister(i));
}
__ stop("testing stop");
__ ret();
__ delayed()->restore();
return start;
}
address generate_stop_subroutine() {
StubCodeMark mark(this, "StubRoutines", "stop_subroutine");
address start = __ pc();
__ stop_subroutine();
return start;
}
address generate_flush_callers_register_windows() {
StubCodeMark mark(this, "StubRoutines", "flush_callers_register_windows");
address start = __ pc();
__ flush_windows();
__ retl(false);
__ delayed()->add( FP, STACK_BIAS, O0 );
// The returned value must be a stack pointer whose register save area
// is flushed, and will stay flushed while the caller executes.
return start;
}
// Helper functions for v8 atomic operations.
//
void get_v8_oop_lock_ptr(Register lock_ptr_reg, Register mark_oop_reg, Register scratch_reg) {
if (mark_oop_reg == noreg) {
address lock_ptr = (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr();
__ set((intptr_t)lock_ptr, lock_ptr_reg);
} else {
assert(scratch_reg != noreg, "just checking");
address lock_ptr = (address)StubRoutines::Sparc::_v8_oop_lock_cache;
__ set((intptr_t)lock_ptr, lock_ptr_reg);
__ and3(mark_oop_reg, StubRoutines::Sparc::v8_oop_lock_mask_in_place, scratch_reg);
__ add(lock_ptr_reg, scratch_reg, lock_ptr_reg);
}
}
void generate_v8_lock_prologue(Register lock_reg, Register lock_ptr_reg, Register yield_reg, Label& retry, Label& dontyield, Register mark_oop_reg = noreg, Register scratch_reg = noreg) {
get_v8_oop_lock_ptr(lock_ptr_reg, mark_oop_reg, scratch_reg);
__ set(StubRoutines::Sparc::locked, lock_reg);
// Initialize yield counter
__ mov(G0,yield_reg);
__ BIND(retry);
__ cmp_and_br_short(yield_reg, V8AtomicOperationUnderLockSpinCount, Assembler::less, Assembler::pt, dontyield);
// This code can only be called from inside the VM, this
// stub is only invoked from Atomic::add(). We do not
// want to use call_VM, because _last_java_sp and such
// must already be set.
//
// Save the regs and make space for a C call
__ save(SP, -96, SP);
__ save_all_globals_into_locals();
BLOCK_COMMENT("call os::naked_sleep");
__ call(CAST_FROM_FN_PTR(address, os::naked_sleep));
__ delayed()->nop();
__ restore_globals_from_locals();
__ restore();
// reset the counter
__ mov(G0,yield_reg);
__ BIND(dontyield);
// try to get lock
__ swap(lock_ptr_reg, 0, lock_reg);
// did we get the lock?
__ cmp(lock_reg, StubRoutines::Sparc::unlocked);
__ br(Assembler::notEqual, true, Assembler::pn, retry);
__ delayed()->add(yield_reg,1,yield_reg);
// yes, got lock. do the operation here.
}
void generate_v8_lock_epilogue(Register lock_reg, Register lock_ptr_reg, Register yield_reg, Label& retry, Label& dontyield, Register mark_oop_reg = noreg, Register scratch_reg = noreg) {
__ st(lock_reg, lock_ptr_reg, 0); // unlock
}
// Support for jint Atomic::xchg(jint exchange_value, volatile jint* dest).
//
// Arguments :
//
// exchange_value: O0
// dest: O1
//
// Results:
//
// O0: the value previously stored in dest
//
address generate_atomic_xchg() {
StubCodeMark mark(this, "StubRoutines", "atomic_xchg");
address start = __ pc();
if (UseCASForSwap) {
// Use CAS instead of swap, just in case the MP hardware
// prefers to work with just one kind of synch. instruction.
Label retry;
__ BIND(retry);
__ mov(O0, O3); // scratch copy of exchange value
__ ld(O1, 0, O2); // observe the previous value
// try to replace O2 with O3
__ cas_under_lock(O1, O2, O3,
(address)StubRoutines::Sparc::atomic_memory_operation_lock_addr(),false);
__ cmp_and_br_short(O2, O3, Assembler::notEqual, Assembler::pn, retry);
__ retl(false);
__ delayed()->mov(O2, O0); // report previous value to caller
} else {
if (VM_Version::v9_instructions_work()) {
__ retl(false);
__ delayed()->swap(O1, 0, O0);
} else {
const Register& lock_reg = O2;
const Register& lock_ptr_reg = O3;
const Register& yield_reg = O4;
Label retry;
Label dontyield;
generate_v8_lock_prologue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield);
// got the lock, do the swap
__ swap(O1, 0, O0);
generate_v8_lock_epilogue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield);
__ retl(false);
__ delayed()->nop();
}
}
return start;
}
// Support for jint Atomic::cmpxchg(jint exchange_value, volatile jint* dest, jint compare_value)
//
// Arguments :
//
// exchange_value: O0
// dest: O1
// compare_value: O2
//
// Results:
//
// O0: the value previously stored in dest
//
// Overwrites (v8): O3,O4,O5
//
address generate_atomic_cmpxchg() {
StubCodeMark mark(this, "StubRoutines", "atomic_cmpxchg");
address start = __ pc();
// cmpxchg(dest, compare_value, exchange_value)
__ cas_under_lock(O1, O2, O0,
(address)StubRoutines::Sparc::atomic_memory_operation_lock_addr(),false);
__ retl(false);
__ delayed()->nop();
return start;
}
// Support for jlong Atomic::cmpxchg(jlong exchange_value, volatile jlong *dest, jlong compare_value)
//
// Arguments :
//
// exchange_value: O1:O0
// dest: O2
// compare_value: O4:O3
//
// Results:
//
// O1:O0: the value previously stored in dest
//
// This only works on V9, on V8 we don't generate any
// code and just return NULL.
//
// Overwrites: G1,G2,G3
//
address generate_atomic_cmpxchg_long() {
StubCodeMark mark(this, "StubRoutines", "atomic_cmpxchg_long");
address start = __ pc();
if (!VM_Version::supports_cx8())
return NULL;;
__ sllx(O0, 32, O0);
__ srl(O1, 0, O1);
__ or3(O0,O1,O0); // O0 holds 64-bit value from compare_value
__ sllx(O3, 32, O3);
__ srl(O4, 0, O4);
__ or3(O3,O4,O3); // O3 holds 64-bit value from exchange_value
__ casx(O2, O3, O0);
__ srl(O0, 0, O1); // unpacked return value in O1:O0
__ retl(false);
__ delayed()->srlx(O0, 32, O0);
return start;
}
// Support for jint Atomic::add(jint add_value, volatile jint* dest).
//
// Arguments :
//
// add_value: O0 (e.g., +1 or -1)
// dest: O1
//
// Results:
//
// O0: the new value stored in dest
//
// Overwrites (v9): O3
// Overwrites (v8): O3,O4,O5
//
address generate_atomic_add() {
StubCodeMark mark(this, "StubRoutines", "atomic_add");
address start = __ pc();
__ BIND(_atomic_add_stub);
if (VM_Version::v9_instructions_work()) {
Label(retry);
__ BIND(retry);
__ lduw(O1, 0, O2);
__ add(O0, O2, O3);
__ cas(O1, O2, O3);
__ cmp_and_br_short(O2, O3, Assembler::notEqual, Assembler::pn, retry);
__ retl(false);
__ delayed()->add(O0, O2, O0); // note that cas made O2==O3
} else {
const Register& lock_reg = O2;
const Register& lock_ptr_reg = O3;
const Register& value_reg = O4;
const Register& yield_reg = O5;
Label(retry);
Label(dontyield);
generate_v8_lock_prologue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield);
// got lock, do the increment
__ ld(O1, 0, value_reg);
__ add(O0, value_reg, value_reg);
__ st(value_reg, O1, 0);
// %%% only for RMO and PSO
__ membar(Assembler::StoreStore);
generate_v8_lock_epilogue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield);
__ retl(false);
__ delayed()->mov(value_reg, O0);
}
return start;
}
Label _atomic_add_stub; // called from other stubs
//------------------------------------------------------------------------------------------------------------------------
// The following routine generates a subroutine to throw an asynchronous
// UnknownError when an unsafe access gets a fault that could not be
// reasonably prevented by the programmer. (Example: SIGBUS/OBJERR.)
//
// Arguments :
//
// trapping PC: O7
//
// Results:
// posts an asynchronous exception, skips the trapping instruction
//
address generate_handler_for_unsafe_access() {
StubCodeMark mark(this, "StubRoutines", "handler_for_unsafe_access");
address start = __ pc();
const int preserve_register_words = (64 * 2);
Address preserve_addr(FP, (-preserve_register_words * wordSize) + STACK_BIAS);
Register Lthread = L7_thread_cache;
int i;
__ save_frame(0);
__ mov(G1, L1);
__ mov(G2, L2);
__ mov(G3, L3);
__ mov(G4, L4);
__ mov(G5, L5);
for (i = 0; i < (VM_Version::v9_instructions_work() ? 64 : 32); i += 2) {
__ stf(FloatRegisterImpl::D, as_FloatRegister(i), preserve_addr, i * wordSize);
}
address entry_point = CAST_FROM_FN_PTR(address, handle_unsafe_access);
BLOCK_COMMENT("call handle_unsafe_access");
__ call(entry_point, relocInfo::runtime_call_type);
__ delayed()->nop();
__ mov(L1, G1);
__ mov(L2, G2);
__ mov(L3, G3);
__ mov(L4, G4);
__ mov(L5, G5);
for (i = 0; i < (VM_Version::v9_instructions_work() ? 64 : 32); i += 2) {
__ ldf(FloatRegisterImpl::D, preserve_addr, as_FloatRegister(i), i * wordSize);
}
__ verify_thread();
__ jmp(O0, 0);
__ delayed()->restore();
return start;
}
// Support for uint StubRoutine::Sparc::partial_subtype_check( Klass sub, Klass super );
// Arguments :
//
// ret : O0, returned
// icc/xcc: set as O0 (depending on wordSize)
// sub : O1, argument, not changed
// super: O2, argument, not changed
// raddr: O7, blown by call
address generate_partial_subtype_check() {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", "partial_subtype_check");
address start = __ pc();
Label miss;
#if defined(COMPILER2) && !defined(_LP64)
// Do not use a 'save' because it blows the 64-bit O registers.
__ add(SP,-4*wordSize,SP); // Make space for 4 temps (stack must be 2 words aligned)
__ st_ptr(L0,SP,(frame::register_save_words+0)*wordSize);
__ st_ptr(L1,SP,(frame::register_save_words+1)*wordSize);
__ st_ptr(L2,SP,(frame::register_save_words+2)*wordSize);
__ st_ptr(L3,SP,(frame::register_save_words+3)*wordSize);
Register Rret = O0;
Register Rsub = O1;
Register Rsuper = O2;
#else
__ save_frame(0);
Register Rret = I0;
Register Rsub = I1;
Register Rsuper = I2;
#endif
Register L0_ary_len = L0;
Register L1_ary_ptr = L1;
Register L2_super = L2;
Register L3_index = L3;
__ check_klass_subtype_slow_path(Rsub, Rsuper,
L0, L1, L2, L3,
NULL, &miss);
// Match falls through here.
__ addcc(G0,0,Rret); // set Z flags, Z result
#if defined(COMPILER2) && !defined(_LP64)
__ ld_ptr(SP,(frame::register_save_words+0)*wordSize,L0);
__ ld_ptr(SP,(frame::register_save_words+1)*wordSize,L1);
__ ld_ptr(SP,(frame::register_save_words+2)*wordSize,L2);
__ ld_ptr(SP,(frame::register_save_words+3)*wordSize,L3);
__ retl(); // Result in Rret is zero; flags set to Z
__ delayed()->add(SP,4*wordSize,SP);
#else
__ ret(); // Result in Rret is zero; flags set to Z
__ delayed()->restore();
#endif
__ BIND(miss);
__ addcc(G0,1,Rret); // set NZ flags, NZ result
#if defined(COMPILER2) && !defined(_LP64)
__ ld_ptr(SP,(frame::register_save_words+0)*wordSize,L0);
__ ld_ptr(SP,(frame::register_save_words+1)*wordSize,L1);
__ ld_ptr(SP,(frame::register_save_words+2)*wordSize,L2);
__ ld_ptr(SP,(frame::register_save_words+3)*wordSize,L3);
__ retl(); // Result in Rret is != 0; flags set to NZ
__ delayed()->add(SP,4*wordSize,SP);
#else
__ ret(); // Result in Rret is != 0; flags set to NZ
__ delayed()->restore();
#endif
return start;
}
// Called from MacroAssembler::verify_oop
//
address generate_verify_oop_subroutine() {
StubCodeMark mark(this, "StubRoutines", "verify_oop_stub");
address start = __ pc();
__ verify_oop_subroutine();
return start;
}
//
// Verify that a register contains clean 32-bits positive value
// (high 32-bits are 0) so it could be used in 64-bits shifts (sllx, srax).
//
// Input:
// Rint - 32-bits value
// Rtmp - scratch
//
void assert_clean_int(Register Rint, Register Rtmp) {
#if defined(ASSERT) && defined(_LP64)
__ signx(Rint, Rtmp);
__ cmp(Rint, Rtmp);
__ breakpoint_trap(Assembler::notEqual, Assembler::xcc);
#endif
}
//
// Generate overlap test for array copy stubs
//
// Input:
// O0 - array1
// O1 - array2
// O2 - element count
//
// Kills temps: O3, O4
//
void array_overlap_test(address no_overlap_target, int log2_elem_size) {
assert(no_overlap_target != NULL, "must be generated");
array_overlap_test(no_overlap_target, NULL, log2_elem_size);
}
void array_overlap_test(Label& L_no_overlap, int log2_elem_size) {
array_overlap_test(NULL, &L_no_overlap, log2_elem_size);
}
void array_overlap_test(address no_overlap_target, Label* NOLp, int log2_elem_size) {
const Register from = O0;
const Register to = O1;
const Register count = O2;
const Register to_from = O3; // to - from
const Register byte_count = O4; // count << log2_elem_size
__ subcc(to, from, to_from);
__ sll_ptr(count, log2_elem_size, byte_count);
if (NOLp == NULL)
__ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, no_overlap_target);
else
__ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, (*NOLp));
__ delayed()->cmp(to_from, byte_count);
if (NOLp == NULL)
__ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, no_overlap_target);
else
__ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, (*NOLp));
__ delayed()->nop();
}
//
// Generate pre-write barrier for array.
//
// Input:
// addr - register containing starting address
// count - register containing element count
// tmp - scratch register
//
// The input registers are overwritten.
//
void gen_write_ref_array_pre_barrier(Register addr, Register count, bool dest_uninitialized) {
BarrierSet* bs = Universe::heap()->barrier_set();
switch (bs->kind()) {
case BarrierSet::G1SATBCT:
case BarrierSet::G1SATBCTLogging:
// With G1, don't generate the call if we statically know that the target in uninitialized
if (!dest_uninitialized) {
__ save_frame(0);
// Save the necessary global regs... will be used after.
if (addr->is_global()) {
__ mov(addr, L0);
}
if (count->is_global()) {
__ mov(count, L1);
}
__ mov(addr->after_save(), O0);
// Get the count into O1
__ call(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_pre));
__ delayed()->mov(count->after_save(), O1);
if (addr->is_global()) {
__ mov(L0, addr);
}
if (count->is_global()) {
__ mov(L1, count);
}
__ restore();
}
break;
case BarrierSet::CardTableModRef:
case BarrierSet::CardTableExtension:
case BarrierSet::ModRef:
break;
default:
ShouldNotReachHere();
}
}
//
// Generate post-write barrier for array.
//
// Input:
// addr - register containing starting address
// count - register containing element count
// tmp - scratch register
//
// The input registers are overwritten.
//
void gen_write_ref_array_post_barrier(Register addr, Register count,
Register tmp) {
BarrierSet* bs = Universe::heap()->barrier_set();
switch (bs->kind()) {
case BarrierSet::G1SATBCT:
case BarrierSet::G1SATBCTLogging:
{
// Get some new fresh output registers.
__ save_frame(0);
__ mov(addr->after_save(), O0);
__ call(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_post));
__ delayed()->mov(count->after_save(), O1);
__ restore();
}
break;
case BarrierSet::CardTableModRef:
case BarrierSet::CardTableExtension:
{
CardTableModRefBS* ct = (CardTableModRefBS*)bs;
assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code");
assert_different_registers(addr, count, tmp);
Label L_loop;
__ sll_ptr(count, LogBytesPerHeapOop, count);
__ sub(count, BytesPerHeapOop, count);
__ add(count, addr, count);
// Use two shifts to clear out those low order two bits! (Cannot opt. into 1.)
__ srl_ptr(addr, CardTableModRefBS::card_shift, addr);
__ srl_ptr(count, CardTableModRefBS::card_shift, count);
__ sub(count, addr, count);
AddressLiteral rs(ct->byte_map_base);
__ set(rs, tmp);
__ BIND(L_loop);
__ stb(G0, tmp, addr);
__ subcc(count, 1, count);
__ brx(Assembler::greaterEqual, false, Assembler::pt, L_loop);
__ delayed()->add(addr, 1, addr);
}
break;
case BarrierSet::ModRef:
break;
default:
ShouldNotReachHere();
}
}
// Copy big chunks forward with shift
//
// Inputs:
// from - source arrays
// to - destination array aligned to 8-bytes
// count - elements count to copy >= the count equivalent to 16 bytes
// count_dec - elements count's decrement equivalent to 16 bytes
// L_copy_bytes - copy exit label
//
void copy_16_bytes_forward_with_shift(Register from, Register to,
Register count, int count_dec, Label& L_copy_bytes) {
Label L_loop, L_aligned_copy, L_copy_last_bytes;
// if both arrays have the same alignment mod 8, do 8 bytes aligned copy
__ andcc(from, 7, G1); // misaligned bytes
__ br(Assembler::zero, false, Assembler::pt, L_aligned_copy);
__ delayed()->nop();
const Register left_shift = G1; // left shift bit counter
const Register right_shift = G5; // right shift bit counter
__ sll(G1, LogBitsPerByte, left_shift);
__ mov(64, right_shift);
__ sub(right_shift, left_shift, right_shift);
//
// Load 2 aligned 8-bytes chunks and use one from previous iteration
// to form 2 aligned 8-bytes chunks to store.
//
__ deccc(count, count_dec); // Pre-decrement 'count'
__ andn(from, 7, from); // Align address
__ ldx(from, 0, O3);
__ inc(from, 8);
__ align(OptoLoopAlignment);
__ BIND(L_loop);
__ ldx(from, 0, O4);
__ deccc(count, count_dec); // Can we do next iteration after this one?
__ ldx(from, 8, G4);
__ inc(to, 16);
__ inc(from, 16);
__ sllx(O3, left_shift, O3);
__ srlx(O4, right_shift, G3);
__ bset(G3, O3);
__ stx(O3, to, -16);
__ sllx(O4, left_shift, O4);
__ srlx(G4, right_shift, G3);
__ bset(G3, O4);
__ stx(O4, to, -8);
__ brx(Assembler::greaterEqual, false, Assembler::pt, L_loop);
__ delayed()->mov(G4, O3);
__ inccc(count, count_dec>>1 ); // + 8 bytes
__ brx(Assembler::negative, true, Assembler::pn, L_copy_last_bytes);
__ delayed()->inc(count, count_dec>>1); // restore 'count'
// copy 8 bytes, part of them already loaded in O3
__ ldx(from, 0, O4);
__ inc(to, 8);
__ inc(from, 8);
__ sllx(O3, left_shift, O3);
__ srlx(O4, right_shift, G3);
__ bset(O3, G3);
__ stx(G3, to, -8);
__ BIND(L_copy_last_bytes);
__ srl(right_shift, LogBitsPerByte, right_shift); // misaligned bytes
__ br(Assembler::always, false, Assembler::pt, L_copy_bytes);
__ delayed()->sub(from, right_shift, from); // restore address
__ BIND(L_aligned_copy);
}
// Copy big chunks backward with shift
//
// Inputs:
// end_from - source arrays end address
// end_to - destination array end address aligned to 8-bytes
// count - elements count to copy >= the count equivalent to 16 bytes
// count_dec - elements count's decrement equivalent to 16 bytes
// L_aligned_copy - aligned copy exit label
// L_copy_bytes - copy exit label
//
void copy_16_bytes_backward_with_shift(Register end_from, Register end_to,
Register count, int count_dec,
Label& L_aligned_copy, Label& L_copy_bytes) {
Label L_loop, L_copy_last_bytes;
// if both arrays have the same alignment mod 8, do 8 bytes aligned copy
__ andcc(end_from, 7, G1); // misaligned bytes
__ br(Assembler::zero, false, Assembler::pt, L_aligned_copy);
__ delayed()->deccc(count, count_dec); // Pre-decrement 'count'
const Register left_shift = G1; // left shift bit counter
const Register right_shift = G5; // right shift bit counter
__ sll(G1, LogBitsPerByte, left_shift);
__ mov(64, right_shift);
__ sub(right_shift, left_shift, right_shift);
//
// Load 2 aligned 8-bytes chunks and use one from previous iteration
// to form 2 aligned 8-bytes chunks to store.
//
__ andn(end_from, 7, end_from); // Align address
__ ldx(end_from, 0, O3);
__ align(OptoLoopAlignment);
__ BIND(L_loop);
__ ldx(end_from, -8, O4);
__ deccc(count, count_dec); // Can we do next iteration after this one?
__ ldx(end_from, -16, G4);
__ dec(end_to, 16);
__ dec(end_from, 16);
__ srlx(O3, right_shift, O3);
__ sllx(O4, left_shift, G3);
__ bset(G3, O3);
__ stx(O3, end_to, 8);
__ srlx(O4, right_shift, O4);
__ sllx(G4, left_shift, G3);
__ bset(G3, O4);
__ stx(O4, end_to, 0);
__ brx(Assembler::greaterEqual, false, Assembler::pt, L_loop);
__ delayed()->mov(G4, O3);
__ inccc(count, count_dec>>1 ); // + 8 bytes
__ brx(Assembler::negative, true, Assembler::pn, L_copy_last_bytes);
__ delayed()->inc(count, count_dec>>1); // restore 'count'
// copy 8 bytes, part of them already loaded in O3
__ ldx(end_from, -8, O4);
__ dec(end_to, 8);
__ dec(end_from, 8);
__ srlx(O3, right_shift, O3);
__ sllx(O4, left_shift, G3);
__ bset(O3, G3);
__ stx(G3, end_to, 0);
__ BIND(L_copy_last_bytes);
__ srl(left_shift, LogBitsPerByte, left_shift); // misaligned bytes
__ br(Assembler::always, false, Assembler::pt, L_copy_bytes);
__ delayed()->add(end_from, left_shift, end_from); // restore address
}
//
// Generate stub for disjoint byte copy. If "aligned" is true, the
// "from" and "to" addresses are assumed to be heapword aligned.
//
// Arguments for generated stub:
// from: O0
// to: O1
// count: O2 treated as signed
//
address generate_disjoint_byte_copy(bool aligned, address *entry, const char *name) {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", name);
address start = __ pc();
Label L_skip_alignment, L_align;
Label L_copy_byte, L_copy_byte_loop, L_exit;
const Register from = O0; // source array address
const Register to = O1; // destination array address
const Register count = O2; // elements count
const Register offset = O5; // offset from start of arrays
// O3, O4, G3, G4 are used as temp registers
assert_clean_int(count, O3); // Make sure 'count' is clean int.
if (entry != NULL) {
*entry = __ pc();
// caller can pass a 64-bit byte count here (from Unsafe.copyMemory)
BLOCK_COMMENT("Entry:");
}
// for short arrays, just do single element copy
__ cmp(count, 23); // 16 + 7
__ brx(Assembler::less, false, Assembler::pn, L_copy_byte);
__ delayed()->mov(G0, offset);
if (aligned) {
// 'aligned' == true when it is known statically during compilation
// of this arraycopy call site that both 'from' and 'to' addresses
// are HeapWordSize aligned (see LibraryCallKit::basictype2arraycopy()).
//
// Aligned arrays have 4 bytes alignment in 32-bits VM
// and 8 bytes - in 64-bits VM. So we do it only for 32-bits VM
//
#ifndef _LP64
// copy a 4-bytes word if necessary to align 'to' to 8 bytes
__ andcc(to, 7, G0);
__ br(Assembler::zero, false, Assembler::pn, L_skip_alignment);
__ delayed()->ld(from, 0, O3);
__ inc(from, 4);
__ inc(to, 4);
__ dec(count, 4);
__ st(O3, to, -4);
__ BIND(L_skip_alignment);
#endif
} else {
// copy bytes to align 'to' on 8 byte boundary
__ andcc(to, 7, G1); // misaligned bytes
__ br(Assembler::zero, false, Assembler::pt, L_skip_alignment);
__ delayed()->neg(G1);
__ inc(G1, 8); // bytes need to copy to next 8-bytes alignment
__ sub(count, G1, count);
__ BIND(L_align);
__ ldub(from, 0, O3);
__ deccc(G1);
__ inc(from);
__ stb(O3, to, 0);
__ br(Assembler::notZero, false, Assembler::pt, L_align);
__ delayed()->inc(to);
__ BIND(L_skip_alignment);
}
#ifdef _LP64
if (!aligned)
#endif
{
// Copy with shift 16 bytes per iteration if arrays do not have
// the same alignment mod 8, otherwise fall through to the next
// code for aligned copy.
// The compare above (count >= 23) guarantes 'count' >= 16 bytes.
// Also jump over aligned copy after the copy with shift completed.
copy_16_bytes_forward_with_shift(from, to, count, 16, L_copy_byte);
}
// Both array are 8 bytes aligned, copy 16 bytes at a time
__ and3(count, 7, G4); // Save count
__ srl(count, 3, count);
generate_disjoint_long_copy_core(aligned);
__ mov(G4, count); // Restore count
// copy tailing bytes
__ BIND(L_copy_byte);
__ cmp_and_br_short(count, 0, Assembler::equal, Assembler::pt, L_exit);
__ align(OptoLoopAlignment);
__ BIND(L_copy_byte_loop);
__ ldub(from, offset, O3);
__ deccc(count);
__ stb(O3, to, offset);
__ brx(Assembler::notZero, false, Assembler::pt, L_copy_byte_loop);
__ delayed()->inc(offset);
__ BIND(L_exit);
// O3, O4 are used as temp registers
inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr, O3, O4);
__ retl();
__ delayed()->mov(G0, O0); // return 0
return start;
}
//
// Generate stub for conjoint byte copy. If "aligned" is true, the
// "from" and "to" addresses are assumed to be heapword aligned.
//
// Arguments for generated stub:
// from: O0
// to: O1
// count: O2 treated as signed
//
address generate_conjoint_byte_copy(bool aligned, address nooverlap_target,
address *entry, const char *name) {
// Do reverse copy.
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", name);
address start = __ pc();
Label L_skip_alignment, L_align, L_aligned_copy;
Label L_copy_byte, L_copy_byte_loop, L_exit;
const Register from = O0; // source array address
const Register to = O1; // destination array address
const Register count = O2; // elements count
const Register end_from = from; // source array end address
const Register end_to = to; // destination array end address
assert_clean_int(count, O3); // Make sure 'count' is clean int.
if (entry != NULL) {
*entry = __ pc();
// caller can pass a 64-bit byte count here (from Unsafe.copyMemory)
BLOCK_COMMENT("Entry:");
}
array_overlap_test(nooverlap_target, 0);
__ add(to, count, end_to); // offset after last copied element
// for short arrays, just do single element copy
__ cmp(count, 23); // 16 + 7
__ brx(Assembler::less, false, Assembler::pn, L_copy_byte);
__ delayed()->add(from, count, end_from);
{
// Align end of arrays since they could be not aligned even
// when arrays itself are aligned.
// copy bytes to align 'end_to' on 8 byte boundary
__ andcc(end_to, 7, G1); // misaligned bytes
__ br(Assembler::zero, false, Assembler::pt, L_skip_alignment);
__ delayed()->nop();
__ sub(count, G1, count);
__ BIND(L_align);
__ dec(end_from);
__ dec(end_to);
__ ldub(end_from, 0, O3);
__ deccc(G1);
__ brx(Assembler::notZero, false, Assembler::pt, L_align);
__ delayed()->stb(O3, end_to, 0);
__ BIND(L_skip_alignment);
}
#ifdef _LP64
if (aligned) {
// Both arrays are aligned to 8-bytes in 64-bits VM.
// The 'count' is decremented in copy_16_bytes_backward_with_shift()
// in unaligned case.
__ dec(count, 16);
} else
#endif
{
// Copy with shift 16 bytes per iteration if arrays do not have
// the same alignment mod 8, otherwise jump to the next
// code for aligned copy (and substracting 16 from 'count' before jump).
// The compare above (count >= 11) guarantes 'count' >= 16 bytes.
// Also jump over aligned copy after the copy with shift completed.
copy_16_bytes_backward_with_shift(end_from, end_to, count, 16,
L_aligned_copy, L_copy_byte);
}
// copy 4 elements (16 bytes) at a time
__ align(OptoLoopAlignment);
__ BIND(L_aligned_copy);
__ dec(end_from, 16);
__ ldx(end_from, 8, O3);
__ ldx(end_from, 0, O4);
__ dec(end_to, 16);
__ deccc(count, 16);
__ stx(O3, end_to, 8);
__ brx(Assembler::greaterEqual, false, Assembler::pt, L_aligned_copy);
__ delayed()->stx(O4, end_to, 0);
__ inc(count, 16);
// copy 1 element (2 bytes) at a time
__ BIND(L_copy_byte);
__ cmp_and_br_short(count, 0, Assembler::equal, Assembler::pt, L_exit);
__ align(OptoLoopAlignment);
__ BIND(L_copy_byte_loop);
__ dec(end_from);
__ dec(end_to);
__ ldub(end_from, 0, O4);
__ deccc(count);
__ brx(Assembler::greater, false, Assembler::pt, L_copy_byte_loop);
__ delayed()->stb(O4, end_to, 0);
__ BIND(L_exit);
// O3, O4 are used as temp registers
inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr, O3, O4);
__ retl();
__ delayed()->mov(G0, O0); // return 0
return start;
}
//
// Generate stub for disjoint short copy. If "aligned" is true, the
// "from" and "to" addresses are assumed to be heapword aligned.
//
// Arguments for generated stub:
// from: O0
// to: O1
// count: O2 treated as signed
//
address generate_disjoint_short_copy(bool aligned, address *entry, const char * name) {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", name);
address start = __ pc();
Label L_skip_alignment, L_skip_alignment2;
Label L_copy_2_bytes, L_copy_2_bytes_loop, L_exit;
const Register from = O0; // source array address
const Register to = O1; // destination array address
const Register count = O2; // elements count
const Register offset = O5; // offset from start of arrays
// O3, O4, G3, G4 are used as temp registers
assert_clean_int(count, O3); // Make sure 'count' is clean int.
if (entry != NULL) {
*entry = __ pc();
// caller can pass a 64-bit byte count here (from Unsafe.copyMemory)
BLOCK_COMMENT("Entry:");
}
// for short arrays, just do single element copy
__ cmp(count, 11); // 8 + 3 (22 bytes)
__ brx(Assembler::less, false, Assembler::pn, L_copy_2_bytes);
__ delayed()->mov(G0, offset);
if (aligned) {
// 'aligned' == true when it is known statically during compilation
// of this arraycopy call site that both 'from' and 'to' addresses
// are HeapWordSize aligned (see LibraryCallKit::basictype2arraycopy()).
//
// Aligned arrays have 4 bytes alignment in 32-bits VM
// and 8 bytes - in 64-bits VM.
//
#ifndef _LP64
// copy a 2-elements word if necessary to align 'to' to 8 bytes
__ andcc(to, 7, G0);
__ br(Assembler::zero, false, Assembler::pt, L_skip_alignment);
__ delayed()->ld(from, 0, O3);
__ inc(from, 4);
__ inc(to, 4);
__ dec(count, 2);
__ st(O3, to, -4);
__ BIND(L_skip_alignment);
#endif
} else {
// copy 1 element if necessary to align 'to' on an 4 bytes
__ andcc(to, 3, G0);
__ br(Assembler::zero, false, Assembler::pt, L_skip_alignment);
__ delayed()->lduh(from, 0, O3);
__ inc(from, 2);
__ inc(to, 2);
__ dec(count);
__ sth(O3, to, -2);
__ BIND(L_skip_alignment);
// copy 2 elements to align 'to' on an 8 byte boundary
__ andcc(to, 7, G0);
__ br(Assembler::zero, false, Assembler::pn, L_skip_alignment2);
__ delayed()->lduh(from, 0, O3);
__ dec(count, 2);
__ lduh(from, 2, O4);
__ inc(from, 4);
__ inc(to, 4);
__ sth(O3, to, -4);
__ sth(O4, to, -2);
__ BIND(L_skip_alignment2);
}
#ifdef _LP64
if (!aligned)
#endif
{
// Copy with shift 16 bytes per iteration if arrays do not have
// the same alignment mod 8, otherwise fall through to the next
// code for aligned copy.
// The compare above (count >= 11) guarantes 'count' >= 16 bytes.
// Also jump over aligned copy after the copy with shift completed.
copy_16_bytes_forward_with_shift(from, to, count, 8, L_copy_2_bytes);
}
// Both array are 8 bytes aligned, copy 16 bytes at a time
__ and3(count, 3, G4); // Save
__ srl(count, 2, count);
generate_disjoint_long_copy_core(aligned);
__ mov(G4, count); // restore
// copy 1 element at a time
__ BIND(L_copy_2_bytes);
__ cmp_and_br_short(count, 0, Assembler::equal, Assembler::pt, L_exit);
__ align(OptoLoopAlignment);
__ BIND(L_copy_2_bytes_loop);
__ lduh(from, offset, O3);
__ deccc(count);
__ sth(O3, to, offset);
__ brx(Assembler::notZero, false, Assembler::pt, L_copy_2_bytes_loop);
__ delayed()->inc(offset, 2);
__ BIND(L_exit);
// O3, O4 are used as temp registers
inc_counter_np(SharedRuntime::_jshort_array_copy_ctr, O3, O4);
__ retl();
__ delayed()->mov(G0, O0); // return 0
return start;
}
//
// Generate stub for disjoint short fill. If "aligned" is true, the
// "to" address is assumed to be heapword aligned.
//
// Arguments for generated stub:
// to: O0
// value: O1
// count: O2 treated as signed
//
address generate_fill(BasicType t, bool aligned, const char* name) {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", name);
address start = __ pc();
const Register to = O0; // source array address
const Register value = O1; // fill value
const Register count = O2; // elements count
// O3 is used as a temp register
assert_clean_int(count, O3); // Make sure 'count' is clean int.
Label L_exit, L_skip_align1, L_skip_align2, L_fill_byte;
Label L_fill_2_bytes, L_fill_elements, L_fill_32_bytes;
int shift = -1;
switch (t) {
case T_BYTE:
shift = 2;
break;
case T_SHORT:
shift = 1;
break;
case T_INT:
shift = 0;
break;
default: ShouldNotReachHere();
}
BLOCK_COMMENT("Entry:");
if (t == T_BYTE) {
// Zero extend value
__ and3(value, 0xff, value);
__ sllx(value, 8, O3);
__ or3(value, O3, value);
}
if (t == T_SHORT) {
// Zero extend value
__ sllx(value, 48, value);
__ srlx(value, 48, value);
}
if (t == T_BYTE || t == T_SHORT) {
__ sllx(value, 16, O3);
__ or3(value, O3, value);
}
__ cmp(count, 2<<shift); // Short arrays (< 8 bytes) fill by element
__ brx(Assembler::lessUnsigned, false, Assembler::pn, L_fill_elements); // use unsigned cmp
__ delayed()->andcc(count, 1, G0);
if (!aligned && (t == T_BYTE || t == T_SHORT)) {
// align source address at 4 bytes address boundary
if (t == T_BYTE) {
// One byte misalignment happens only for byte arrays
__ andcc(to, 1, G0);
__ br(Assembler::zero, false, Assembler::pt, L_skip_align1);
__ delayed()->nop();
__ stb(value, to, 0);
__ inc(to, 1);
__ dec(count, 1);
__ BIND(L_skip_align1);
}
// Two bytes misalignment happens only for byte and short (char) arrays
__ andcc(to, 2, G0);
__ br(Assembler::zero, false, Assembler::pt, L_skip_align2);
__ delayed()->nop();
__ sth(value, to, 0);
__ inc(to, 2);
__ dec(count, 1 << (shift - 1));
__ BIND(L_skip_align2);
}
#ifdef _LP64
if (!aligned) {
#endif
// align to 8 bytes, we know we are 4 byte aligned to start
__ andcc(to, 7, G0);
__ br(Assembler::zero, false, Assembler::pt, L_fill_32_bytes);
__ delayed()->nop();
__ stw(value, to, 0);
__ inc(to, 4);
__ dec(count, 1 << shift);
__ BIND(L_fill_32_bytes);
#ifdef _LP64
}
#endif
if (t == T_INT) {
// Zero extend value
__ srl(value, 0, value);
}
if (t == T_BYTE || t == T_SHORT || t == T_INT) {
__ sllx(value, 32, O3);
__ or3(value, O3, value);
}
Label L_check_fill_8_bytes;
// Fill 32-byte chunks
__ subcc(count, 8 << shift, count);
__ brx(Assembler::less, false, Assembler::pt, L_check_fill_8_bytes);
__ delayed()->nop();
Label L_fill_32_bytes_loop, L_fill_4_bytes;
__ align(16);
__ BIND(L_fill_32_bytes_loop);
__ stx(value, to, 0);
__ stx(value, to, 8);
__ stx(value, to, 16);
__ stx(value, to, 24);
__ subcc(count, 8 << shift, count);
__ brx(Assembler::greaterEqual, false, Assembler::pt, L_fill_32_bytes_loop);
__ delayed()->add(to, 32, to);
__ BIND(L_check_fill_8_bytes);
__ addcc(count, 8 << shift, count);
__ brx(Assembler::zero, false, Assembler::pn, L_exit);
__ delayed()->subcc(count, 1 << (shift + 1), count);
__ brx(Assembler::less, false, Assembler::pn, L_fill_4_bytes);
__ delayed()->andcc(count, 1<<shift, G0);
//
// length is too short, just fill 8 bytes at a time
//
Label L_fill_8_bytes_loop;
__ BIND(L_fill_8_bytes_loop);
__ stx(value, to, 0);
__ subcc(count, 1 << (shift + 1), count);
__ brx(Assembler::greaterEqual, false, Assembler::pn, L_fill_8_bytes_loop);
__ delayed()->add(to, 8, to);
// fill trailing 4 bytes
__ andcc(count, 1<<shift, G0); // in delay slot of branches
if (t == T_INT) {
__ BIND(L_fill_elements);
}
__ BIND(L_fill_4_bytes);
__ brx(Assembler::zero, false, Assembler::pt, L_fill_2_bytes);
if (t == T_BYTE || t == T_SHORT) {
__ delayed()->andcc(count, 1<<(shift-1), G0);
} else {
__ delayed()->nop();
}
__ stw(value, to, 0);
if (t == T_BYTE || t == T_SHORT) {
__ inc(to, 4);
// fill trailing 2 bytes
__ andcc(count, 1<<(shift-1), G0); // in delay slot of branches
__ BIND(L_fill_2_bytes);
__ brx(Assembler::zero, false, Assembler::pt, L_fill_byte);
__ delayed()->andcc(count, 1, count);
__ sth(value, to, 0);
if (t == T_BYTE) {
__ inc(to, 2);
// fill trailing byte
__ andcc(count, 1, count); // in delay slot of branches
__ BIND(L_fill_byte);
__ brx(Assembler::zero, false, Assembler::pt, L_exit);
__ delayed()->nop();
__ stb(value, to, 0);
} else {
__ BIND(L_fill_byte);
}
} else {
__ BIND(L_fill_2_bytes);
}
__ BIND(L_exit);
__ retl();
__ delayed()->nop();
// Handle copies less than 8 bytes. Int is handled elsewhere.
if (t == T_BYTE) {
__ BIND(L_fill_elements);
Label L_fill_2, L_fill_4;
// in delay slot __ andcc(count, 1, G0);
__ brx(Assembler::zero, false, Assembler::pt, L_fill_2);
__ delayed()->andcc(count, 2, G0);
__ stb(value, to, 0);
__ inc(to, 1);
__ BIND(L_fill_2);
__ brx(Assembler::zero, false, Assembler::pt, L_fill_4);
__ delayed()->andcc(count, 4, G0);
__ stb(value, to, 0);
__ stb(value, to, 1);
__ inc(to, 2);
__ BIND(L_fill_4);
__ brx(Assembler::zero, false, Assembler::pt, L_exit);
__ delayed()->nop();
__ stb(value, to, 0);
__ stb(value, to, 1);
__ stb(value, to, 2);
__ retl();
__ delayed()->stb(value, to, 3);
}
if (t == T_SHORT) {
Label L_fill_2;
__ BIND(L_fill_elements);
// in delay slot __ andcc(count, 1, G0);
__ brx(Assembler::zero, false, Assembler::pt, L_fill_2);
__ delayed()->andcc(count, 2, G0);
__ sth(value, to, 0);
__ inc(to, 2);
__ BIND(L_fill_2);
__ brx(Assembler::zero, false, Assembler::pt, L_exit);
__ delayed()->nop();
__ sth(value, to, 0);
__ retl();
__ delayed()->sth(value, to, 2);
}
return start;
}
//
// Generate stub for conjoint short copy. If "aligned" is true, the
// "from" and "to" addresses are assumed to be heapword aligned.
//
// Arguments for generated stub:
// from: O0
// to: O1
// count: O2 treated as signed
//
address generate_conjoint_short_copy(bool aligned, address nooverlap_target,
address *entry, const char *name) {
// Do reverse copy.
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", name);
address start = __ pc();
Label L_skip_alignment, L_skip_alignment2, L_aligned_copy;
Label L_copy_2_bytes, L_copy_2_bytes_loop, L_exit;
const Register from = O0; // source array address
const Register to = O1; // destination array address
const Register count = O2; // elements count
const Register end_from = from; // source array end address
const Register end_to = to; // destination array end address
const Register byte_count = O3; // bytes count to copy
assert_clean_int(count, O3); // Make sure 'count' is clean int.
if (entry != NULL) {
*entry = __ pc();
// caller can pass a 64-bit byte count here (from Unsafe.copyMemory)
BLOCK_COMMENT("Entry:");
}
array_overlap_test(nooverlap_target, 1);
__ sllx(count, LogBytesPerShort, byte_count);
__ add(to, byte_count, end_to); // offset after last copied element
// for short arrays, just do single element copy
__ cmp(count, 11); // 8 + 3 (22 bytes)
__ brx(Assembler::less, false, Assembler::pn, L_copy_2_bytes);
__ delayed()->add(from, byte_count, end_from);
{
// Align end of arrays since they could be not aligned even
// when arrays itself are aligned.
// copy 1 element if necessary to align 'end_to' on an 4 bytes
__ andcc(end_to, 3, G0);
__ br(Assembler::zero, false, Assembler::pt, L_skip_alignment);
__ delayed()->lduh(end_from, -2, O3);
__ dec(end_from, 2);
__ dec(end_to, 2);
__ dec(count);
__ sth(O3, end_to, 0);
__ BIND(L_skip_alignment);
// copy 2 elements to align 'end_to' on an 8 byte boundary
__ andcc(end_to, 7, G0);
__ br(Assembler::zero, false, Assembler::pn, L_skip_alignment2);
__ delayed()->lduh(end_from, -2, O3);
__ dec(count, 2);
__ lduh(end_from, -4, O4);
__ dec(end_from, 4);
__ dec(end_to, 4);
__ sth(O3, end_to, 2);
__ sth(O4, end_to, 0);
__ BIND(L_skip_alignment2);
}
#ifdef _LP64
if (aligned) {
// Both arrays are aligned to 8-bytes in 64-bits VM.
// The 'count' is decremented in copy_16_bytes_backward_with_shift()
// in unaligned case.
__ dec(count, 8);
} else
#endif
{
// Copy with shift 16 bytes per iteration if arrays do not have
// the same alignment mod 8, otherwise jump to the next
// code for aligned copy (and substracting 8 from 'count' before jump).
// The compare above (count >= 11) guarantes 'count' >= 16 bytes.
// Also jump over aligned copy after the copy with shift completed.
copy_16_bytes_backward_with_shift(end_from, end_to, count, 8,
L_aligned_copy, L_copy_2_bytes);
}
// copy 4 elements (16 bytes) at a time
__ align(OptoLoopAlignment);
__ BIND(L_aligned_copy);
__ dec(end_from, 16);
__ ldx(end_from, 8, O3);
__ ldx(end_from, 0, O4);
__ dec(end_to, 16);
__ deccc(count, 8);
__ stx(O3, end_to, 8);
__ brx(Assembler::greaterEqual, false, Assembler::pt, L_aligned_copy);
__ delayed()->stx(O4, end_to, 0);
__ inc(count, 8);
// copy 1 element (2 bytes) at a time
__ BIND(L_copy_2_bytes);
__ cmp_and_br_short(count, 0, Assembler::equal, Assembler::pt, L_exit);
__ BIND(L_copy_2_bytes_loop);
__ dec(end_from, 2);
__ dec(end_to, 2);
__ lduh(end_from, 0, O4);
__ deccc(count);
__ brx(Assembler::greater, false, Assembler::pt, L_copy_2_bytes_loop);
__ delayed()->sth(O4, end_to, 0);
__ BIND(L_exit);
// O3, O4 are used as temp registers
inc_counter_np(SharedRuntime::_jshort_array_copy_ctr, O3, O4);
__ retl();
__ delayed()->mov(G0, O0); // return 0
return start;
}
//
// Generate core code for disjoint int copy (and oop copy on 32-bit).
// If "aligned" is true, the "from" and "to" addresses are assumed
// to be heapword aligned.
//
// Arguments:
// from: O0
// to: O1
// count: O2 treated as signed
//
void generate_disjoint_int_copy_core(bool aligned) {
Label L_skip_alignment, L_aligned_copy;
Label L_copy_16_bytes, L_copy_4_bytes, L_copy_4_bytes_loop, L_exit;
const Register from = O0; // source array address
const Register to = O1; // destination array address
const Register count = O2; // elements count
const Register offset = O5; // offset from start of arrays
// O3, O4, G3, G4 are used as temp registers
// 'aligned' == true when it is known statically during compilation
// of this arraycopy call site that both 'from' and 'to' addresses
// are HeapWordSize aligned (see LibraryCallKit::basictype2arraycopy()).
//
// Aligned arrays have 4 bytes alignment in 32-bits VM
// and 8 bytes - in 64-bits VM.
//
#ifdef _LP64
if (!aligned)
#endif
{
// The next check could be put under 'ifndef' since the code in
// generate_disjoint_long_copy_core() has own checks and set 'offset'.
// for short arrays, just do single element copy
__ cmp(count, 5); // 4 + 1 (20 bytes)
__ brx(Assembler::lessEqual, false, Assembler::pn, L_copy_4_bytes);
__ delayed()->mov(G0, offset);
// copy 1 element to align 'to' on an 8 byte boundary
__ andcc(to, 7, G0);
__ br(Assembler::zero, false, Assembler::pt, L_skip_alignment);
__ delayed()->ld(from, 0, O3);
__ inc(from, 4);
__ inc(to, 4);
__ dec(count);
__ st(O3, to, -4);
__ BIND(L_skip_alignment);
// if arrays have same alignment mod 8, do 4 elements copy
__ andcc(from, 7, G0);
__ br(Assembler::zero, false, Assembler::pt, L_aligned_copy);
__ delayed()->ld(from, 0, O3);
//
// Load 2 aligned 8-bytes chunks and use one from previous iteration
// to form 2 aligned 8-bytes chunks to store.
//
// copy_16_bytes_forward_with_shift() is not used here since this
// code is more optimal.
// copy with shift 4 elements (16 bytes) at a time
__ dec(count, 4); // The cmp at the beginning guaranty count >= 4
__ align(OptoLoopAlignment);
__ BIND(L_copy_16_bytes);
__ ldx(from, 4, O4);
__ deccc(count, 4); // Can we do next iteration after this one?
__ ldx(from, 12, G4);
__ inc(to, 16);
__ inc(from, 16);
__ sllx(O3, 32, O3);
__ srlx(O4, 32, G3);
__ bset(G3, O3);
__ stx(O3, to, -16);
__ sllx(O4, 32, O4);
__ srlx(G4, 32, G3);
__ bset(G3, O4);
__ stx(O4, to, -8);
__ brx(Assembler::greaterEqual, false, Assembler::pt, L_copy_16_bytes);
__ delayed()->mov(G4, O3);
__ br(Assembler::always, false, Assembler::pt, L_copy_4_bytes);
__ delayed()->inc(count, 4); // restore 'count'
__ BIND(L_aligned_copy);
}
// copy 4 elements (16 bytes) at a time
__ and3(count, 1, G4); // Save
__ srl(count, 1, count);
generate_disjoint_long_copy_core(aligned);
__ mov(G4, count); // Restore
// copy 1 element at a time
__ BIND(L_copy_4_bytes);
__ cmp_and_br_short(count, 0, Assembler::equal, Assembler::pt, L_exit);
__ BIND(L_copy_4_bytes_loop);
__ ld(from, offset, O3);
__ deccc(count);
__ st(O3, to, offset);
__ brx(Assembler::notZero, false, Assembler::pt, L_copy_4_bytes_loop);
__ delayed()->inc(offset, 4);
__ BIND(L_exit);
}
//
// Generate stub for disjoint int copy. If "aligned" is true, the
// "from" and "to" addresses are assumed to be heapword aligned.
//
// Arguments for generated stub:
// from: O0
// to: O1
// count: O2 treated as signed
//
address generate_disjoint_int_copy(bool aligned, address *entry, const char *name) {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", name);
address start = __ pc();
const Register count = O2;
assert_clean_int(count, O3); // Make sure 'count' is clean int.
if (entry != NULL) {
*entry = __ pc();
// caller can pass a 64-bit byte count here (from Unsafe.copyMemory)
BLOCK_COMMENT("Entry:");
}
generate_disjoint_int_copy_core(aligned);
// O3, O4 are used as temp registers
inc_counter_np(SharedRuntime::_jint_array_copy_ctr, O3, O4);
__ retl();
__ delayed()->mov(G0, O0); // return 0
return start;
}
//
// Generate core code for conjoint int copy (and oop copy on 32-bit).
// If "aligned" is true, the "from" and "to" addresses are assumed
// to be heapword aligned.
//
// Arguments:
// from: O0
// to: O1
// count: O2 treated as signed
//
void generate_conjoint_int_copy_core(bool aligned) {
// Do reverse copy.
Label L_skip_alignment, L_aligned_copy;
Label L_copy_16_bytes, L_copy_4_bytes, L_copy_4_bytes_loop, L_exit;
const Register from = O0; // source array address
const Register to = O1; // destination array address
const Register count = O2; // elements count
const Register end_from = from; // source array end address
const Register end_to = to; // destination array end address
// O3, O4, O5, G3 are used as temp registers
const Register byte_count = O3; // bytes count to copy
__ sllx(count, LogBytesPerInt, byte_count);
__ add(to, byte_count, end_to); // offset after last copied element
__ cmp(count, 5); // for short arrays, just do single element copy
__ brx(Assembler::lessEqual, false, Assembler::pn, L_copy_4_bytes);
__ delayed()->add(from, byte_count, end_from);
// copy 1 element to align 'to' on an 8 byte boundary
__ andcc(end_to, 7, G0);
__ br(Assembler::zero, false, Assembler::pt, L_skip_alignment);
__ delayed()->nop();
__ dec(count);
__ dec(end_from, 4);
__ dec(end_to, 4);
__ ld(end_from, 0, O4);
__ st(O4, end_to, 0);
__ BIND(L_skip_alignment);
// Check if 'end_from' and 'end_to' has the same alignment.
__ andcc(end_from, 7, G0);
__ br(Assembler::zero, false, Assembler::pt, L_aligned_copy);
__ delayed()->dec(count, 4); // The cmp at the start guaranty cnt >= 4
// copy with shift 4 elements (16 bytes) at a time
//
// Load 2 aligned 8-bytes chunks and use one from previous iteration
// to form 2 aligned 8-bytes chunks to store.
//
__ ldx(end_from, -4, O3);
__ align(OptoLoopAlignment);
__ BIND(L_copy_16_bytes);
__ ldx(end_from, -12, O4);
__ deccc(count, 4);
__ ldx(end_from, -20, O5);
__ dec(end_to, 16);
__ dec(end_from, 16);
__ srlx(O3, 32, O3);
__ sllx(O4, 32, G3);
__ bset(G3, O3);
__ stx(O3, end_to, 8);
__ srlx(O4, 32, O4);
__ sllx(O5, 32, G3);
__ bset(O4, G3);
__ stx(G3, end_to, 0);
__ brx(Assembler::greaterEqual, false, Assembler::pt, L_copy_16_bytes);
__ delayed()->mov(O5, O3);
__ br(Assembler::always, false, Assembler::pt, L_copy_4_bytes);
__ delayed()->inc(count, 4);
// copy 4 elements (16 bytes) at a time
__ align(OptoLoopAlignment);
__ BIND(L_aligned_copy);
__ dec(end_from, 16);
__ ldx(end_from, 8, O3);
__ ldx(end_from, 0, O4);
__ dec(end_to, 16);
__ deccc(count, 4);
__ stx(O3, end_to, 8);
__ brx(Assembler::greaterEqual, false, Assembler::pt, L_aligned_copy);
__ delayed()->stx(O4, end_to, 0);
__ inc(count, 4);
// copy 1 element (4 bytes) at a time
__ BIND(L_copy_4_bytes);
__ cmp_and_br_short(count, 0, Assembler::equal, Assembler::pt, L_exit);
__ BIND(L_copy_4_bytes_loop);
__ dec(end_from, 4);
__ dec(end_to, 4);
__ ld(end_from, 0, O4);
__ deccc(count);
__ brx(Assembler::greater, false, Assembler::pt, L_copy_4_bytes_loop);
__ delayed()->st(O4, end_to, 0);
__ BIND(L_exit);
}
//
// Generate stub for conjoint int copy. If "aligned" is true, the
// "from" and "to" addresses are assumed to be heapword aligned.
//
// Arguments for generated stub:
// from: O0
// to: O1
// count: O2 treated as signed
//
address generate_conjoint_int_copy(bool aligned, address nooverlap_target,
address *entry, const char *name) {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", name);
address start = __ pc();
assert_clean_int(O2, O3); // Make sure 'count' is clean int.
if (entry != NULL) {
*entry = __ pc();
// caller can pass a 64-bit byte count here (from Unsafe.copyMemory)
BLOCK_COMMENT("Entry:");
}
array_overlap_test(nooverlap_target, 2);
generate_conjoint_int_copy_core(aligned);
// O3, O4 are used as temp registers
inc_counter_np(SharedRuntime::_jint_array_copy_ctr, O3, O4);
__ retl();
__ delayed()->mov(G0, O0); // return 0
return start;
}
//
// Generate core code for disjoint long copy (and oop copy on 64-bit).
// "aligned" is ignored, because we must make the stronger
// assumption that both addresses are always 64-bit aligned.
//
// Arguments:
// from: O0
// to: O1
// count: O2 treated as signed
//
// count -= 2;
// if ( count >= 0 ) { // >= 2 elements
// if ( count > 6) { // >= 8 elements
// count -= 6; // original count - 8
// do {
// copy_8_elements;
// count -= 8;
// } while ( count >= 0 );
// count += 6;
// }
// if ( count >= 0 ) { // >= 2 elements
// do {
// copy_2_elements;
// } while ( (count=count-2) >= 0 );
// }
// }
// count += 2;
// if ( count != 0 ) { // 1 element left
// copy_1_element;
// }
//
void generate_disjoint_long_copy_core(bool aligned) {
Label L_copy_8_bytes, L_copy_16_bytes, L_exit;
const Register from = O0; // source array address
const Register to = O1; // destination array address
const Register count = O2; // elements count
const Register offset0 = O4; // element offset
const Register offset8 = O5; // next element offset
__ deccc(count, 2);
__ mov(G0, offset0); // offset from start of arrays (0)
__ brx(Assembler::negative, false, Assembler::pn, L_copy_8_bytes );
__ delayed()->add(offset0, 8, offset8);
// Copy by 64 bytes chunks
Label L_copy_64_bytes;
const Register from64 = O3; // source address
const Register to64 = G3; // destination address
__ subcc(count, 6, O3);
__ brx(Assembler::negative, false, Assembler::pt, L_copy_16_bytes );
__ delayed()->mov(to, to64);
// Now we can use O4(offset0), O5(offset8) as temps
__ mov(O3, count);
__ mov(from, from64);
__ align(OptoLoopAlignment);
__ BIND(L_copy_64_bytes);
for( int off = 0; off < 64; off += 16 ) {
__ ldx(from64, off+0, O4);
__ ldx(from64, off+8, O5);
__ stx(O4, to64, off+0);
__ stx(O5, to64, off+8);
}
__ deccc(count, 8);
__ inc(from64, 64);
__ brx(Assembler::greaterEqual, false, Assembler::pt, L_copy_64_bytes);
__ delayed()->inc(to64, 64);
// Restore O4(offset0), O5(offset8)
__ sub(from64, from, offset0);
__ inccc(count, 6);
__ brx(Assembler::negative, false, Assembler::pn, L_copy_8_bytes );
__ delayed()->add(offset0, 8, offset8);
// Copy by 16 bytes chunks
__ align(OptoLoopAlignment);
__ BIND(L_copy_16_bytes);
__ ldx(from, offset0, O3);
__ ldx(from, offset8, G3);
__ deccc(count, 2);
__ stx(O3, to, offset0);
__ inc(offset0, 16);
__ stx(G3, to, offset8);
__ brx(Assembler::greaterEqual, false, Assembler::pt, L_copy_16_bytes);
__ delayed()->inc(offset8, 16);
// Copy last 8 bytes
__ BIND(L_copy_8_bytes);
__ inccc(count, 2);
__ brx(Assembler::zero, true, Assembler::pn, L_exit );
__ delayed()->mov(offset0, offset8); // Set O5 used by other stubs
__ ldx(from, offset0, O3);
__ stx(O3, to, offset0);
__ BIND(L_exit);
}
//
// Generate stub for disjoint long copy.
// "aligned" is ignored, because we must make the stronger
// assumption that both addresses are always 64-bit aligned.
//
// Arguments for generated stub:
// from: O0
// to: O1
// count: O2 treated as signed
//
address generate_disjoint_long_copy(bool aligned, address *entry, const char *name) {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", name);
address start = __ pc();
assert_clean_int(O2, O3); // Make sure 'count' is clean int.
if (entry != NULL) {
*entry = __ pc();
// caller can pass a 64-bit byte count here (from Unsafe.copyMemory)
BLOCK_COMMENT("Entry:");
}
generate_disjoint_long_copy_core(aligned);
// O3, O4 are used as temp registers
inc_counter_np(SharedRuntime::_jlong_array_copy_ctr, O3, O4);
__ retl();
__ delayed()->mov(G0, O0); // return 0
return start;
}
//
// Generate core code for conjoint long copy (and oop copy on 64-bit).
// "aligned" is ignored, because we must make the stronger
// assumption that both addresses are always 64-bit aligned.
//
// Arguments:
// from: O0
// to: O1
// count: O2 treated as signed
//
void generate_conjoint_long_copy_core(bool aligned) {
// Do reverse copy.
Label L_copy_8_bytes, L_copy_16_bytes, L_exit;
const Register from = O0; // source array address
const Register to = O1; // destination array address
const Register count = O2; // elements count
const Register offset8 = O4; // element offset
const Register offset0 = O5; // previous element offset
__ subcc(count, 1, count);
__ brx(Assembler::lessEqual, false, Assembler::pn, L_copy_8_bytes );
__ delayed()->sllx(count, LogBytesPerLong, offset8);
__ sub(offset8, 8, offset0);
__ align(OptoLoopAlignment);
__ BIND(L_copy_16_bytes);
__ ldx(from, offset8, O2);
__ ldx(from, offset0, O3);
__ stx(O2, to, offset8);
__ deccc(offset8, 16); // use offset8 as counter
__ stx(O3, to, offset0);
__ brx(Assembler::greater, false, Assembler::pt, L_copy_16_bytes);
__ delayed()->dec(offset0, 16);
__ BIND(L_copy_8_bytes);
__ brx(Assembler::negative, false, Assembler::pn, L_exit );
__ delayed()->nop();
__ ldx(from, 0, O3);
__ stx(O3, to, 0);
__ BIND(L_exit);
}
// Generate stub for conjoint long copy.
// "aligned" is ignored, because we must make the stronger
// assumption that both addresses are always 64-bit aligned.
//
// Arguments for generated stub:
// from: O0
// to: O1
// count: O2 treated as signed
//
address generate_conjoint_long_copy(bool aligned, address nooverlap_target,
address *entry, const char *name) {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", name);
address start = __ pc();
assert(aligned, "Should always be aligned");
assert_clean_int(O2, O3); // Make sure 'count' is clean int.
if (entry != NULL) {
*entry = __ pc();
// caller can pass a 64-bit byte count here (from Unsafe.copyMemory)
BLOCK_COMMENT("Entry:");
}
array_overlap_test(nooverlap_target, 3);
generate_conjoint_long_copy_core(aligned);
// O3, O4 are used as temp registers
inc_counter_np(SharedRuntime::_jlong_array_copy_ctr, O3, O4);
__ retl();
__ delayed()->mov(G0, O0); // return 0
return start;
}
// Generate stub for disjoint oop copy. If "aligned" is true, the
// "from" and "to" addresses are assumed to be heapword aligned.
//
// Arguments for generated stub:
// from: O0
// to: O1
// count: O2 treated as signed
//
address generate_disjoint_oop_copy(bool aligned, address *entry, const char *name,
bool dest_uninitialized = false) {
const Register from = O0; // source array address
const Register to = O1; // destination array address
const Register count = O2; // elements count
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", name);
address start = __ pc();
assert_clean_int(count, O3); // Make sure 'count' is clean int.
if (entry != NULL) {
*entry = __ pc();
// caller can pass a 64-bit byte count here
BLOCK_COMMENT("Entry:");
}
// save arguments for barrier generation
__ mov(to, G1);
__ mov(count, G5);
gen_write_ref_array_pre_barrier(G1, G5, dest_uninitialized);
#ifdef _LP64
assert_clean_int(count, O3); // Make sure 'count' is clean int.
if (UseCompressedOops) {
generate_disjoint_int_copy_core(aligned);
} else {
generate_disjoint_long_copy_core(aligned);
}
#else
generate_disjoint_int_copy_core(aligned);
#endif
// O0 is used as temp register
gen_write_ref_array_post_barrier(G1, G5, O0);
// O3, O4 are used as temp registers
inc_counter_np(SharedRuntime::_oop_array_copy_ctr, O3, O4);
__ retl();
__ delayed()->mov(G0, O0); // return 0
return start;
}
// Generate stub for conjoint oop copy. If "aligned" is true, the
// "from" and "to" addresses are assumed to be heapword aligned.
//
// Arguments for generated stub:
// from: O0
// to: O1
// count: O2 treated as signed
//
address generate_conjoint_oop_copy(bool aligned, address nooverlap_target,
address *entry, const char *name,
bool dest_uninitialized = false) {
const Register from = O0; // source array address
const Register to = O1; // destination array address
const Register count = O2; // elements count
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", name);
address start = __ pc();
assert_clean_int(count, O3); // Make sure 'count' is clean int.
if (entry != NULL) {
*entry = __ pc();
// caller can pass a 64-bit byte count here
BLOCK_COMMENT("Entry:");
}
array_overlap_test(nooverlap_target, LogBytesPerHeapOop);
// save arguments for barrier generation
__ mov(to, G1);
__ mov(count, G5);
gen_write_ref_array_pre_barrier(G1, G5, dest_uninitialized);
#ifdef _LP64
if (UseCompressedOops) {
generate_conjoint_int_copy_core(aligned);
} else {
generate_conjoint_long_copy_core(aligned);
}
#else
generate_conjoint_int_copy_core(aligned);
#endif
// O0 is used as temp register
gen_write_ref_array_post_barrier(G1, G5, O0);
// O3, O4 are used as temp registers
inc_counter_np(SharedRuntime::_oop_array_copy_ctr, O3, O4);
__ retl();
__ delayed()->mov(G0, O0); // return 0
return start;
}
// Helper for generating a dynamic type check.
// Smashes only the given temp registers.
void generate_type_check(Register sub_klass,
Register super_check_offset,
Register super_klass,
Register temp,
Label& L_success) {
assert_different_registers(sub_klass, super_check_offset, super_klass, temp);
BLOCK_COMMENT("type_check:");
Label L_miss, L_pop_to_miss;
assert_clean_int(super_check_offset, temp);
__ check_klass_subtype_fast_path(sub_klass, super_klass, temp, noreg,
&L_success, &L_miss, NULL,
super_check_offset);
BLOCK_COMMENT("type_check_slow_path:");
__ save_frame(0);
__ check_klass_subtype_slow_path(sub_klass->after_save(),
super_klass->after_save(),
L0, L1, L2, L4,
NULL, &L_pop_to_miss);
__ ba(L_success);
__ delayed()->restore();
__ bind(L_pop_to_miss);
__ restore();
// Fall through on failure!
__ BIND(L_miss);
}
// Generate stub for checked oop copy.
//
// Arguments for generated stub:
// from: O0
// to: O1
// count: O2 treated as signed
// ckoff: O3 (super_check_offset)
// ckval: O4 (super_klass)
// ret: O0 zero for success; (-1^K) where K is partial transfer count
//
address generate_checkcast_copy(const char *name, address *entry, bool dest_uninitialized = false) {
const Register O0_from = O0; // source array address
const Register O1_to = O1; // destination array address
const Register O2_count = O2; // elements count
const Register O3_ckoff = O3; // super_check_offset
const Register O4_ckval = O4; // super_klass
const Register O5_offset = O5; // loop var, with stride wordSize
const Register G1_remain = G1; // loop var, with stride -1
const Register G3_oop = G3; // actual oop copied
const Register G4_klass = G4; // oop._klass
const Register G5_super = G5; // oop._klass._primary_supers[ckval]
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", name);
address start = __ pc();
#ifdef ASSERT
// We sometimes save a frame (see generate_type_check below).
// If this will cause trouble, let's fail now instead of later.
__ save_frame(0);
__ restore();
#endif
assert_clean_int(O2_count, G1); // Make sure 'count' is clean int.
#ifdef ASSERT
// caller guarantees that the arrays really are different
// otherwise, we would have to make conjoint checks
{ Label L;
__ mov(O3, G1); // spill: overlap test smashes O3
__ mov(O4, G4); // spill: overlap test smashes O4
array_overlap_test(L, LogBytesPerHeapOop);
__ stop("checkcast_copy within a single array");
__ bind(L);
__ mov(G1, O3);
__ mov(G4, O4);
}
#endif //ASSERT
if (entry != NULL) {
*entry = __ pc();
// caller can pass a 64-bit byte count here (from generic stub)
BLOCK_COMMENT("Entry:");
}
gen_write_ref_array_pre_barrier(O1_to, O2_count, dest_uninitialized);
Label load_element, store_element, do_card_marks, fail, done;
__ addcc(O2_count, 0, G1_remain); // initialize loop index, and test it
__ brx(Assembler::notZero, false, Assembler::pt, load_element);
__ delayed()->mov(G0, O5_offset); // offset from start of arrays
// Empty array: Nothing to do.
inc_counter_np(SharedRuntime::_checkcast_array_copy_ctr, O3, O4);
__ retl();
__ delayed()->set(0, O0); // return 0 on (trivial) success
// ======== begin loop ========
// (Loop is rotated; its entry is load_element.)
// Loop variables:
// (O5 = 0; ; O5 += wordSize) --- offset from src, dest arrays
// (O2 = len; O2 != 0; O2--) --- number of oops *remaining*
// G3, G4, G5 --- current oop, oop.klass, oop.klass.super
__ align(OptoLoopAlignment);
__ BIND(store_element);
__ deccc(G1_remain); // decrement the count
__ store_heap_oop(G3_oop, O1_to, O5_offset); // store the oop
__ inc(O5_offset, heapOopSize); // step to next offset
__ brx(Assembler::zero, true, Assembler::pt, do_card_marks);
__ delayed()->set(0, O0); // return -1 on success
// ======== loop entry is here ========
__ BIND(load_element);
__ load_heap_oop(O0_from, O5_offset, G3_oop); // load the oop
__ br_null_short(G3_oop, Assembler::pt, store_element);
__ load_klass(G3_oop, G4_klass); // query the object klass
generate_type_check(G4_klass, O3_ckoff, O4_ckval, G5_super,
// branch to this on success:
store_element);
// ======== end loop ========
// It was a real error; we must depend on the caller to finish the job.
// Register G1 has number of *remaining* oops, O2 number of *total* oops.
// Emit GC store barriers for the oops we have copied (O2 minus G1),
// and report their number to the caller.
__ BIND(fail);
__ subcc(O2_count, G1_remain, O2_count);
__ brx(Assembler::zero, false, Assembler::pt, done);
__ delayed()->not1(O2_count, O0); // report (-1^K) to caller
__ BIND(do_card_marks);
gen_write_ref_array_post_barrier(O1_to, O2_count, O3); // store check on O1[0..O2]
__ BIND(done);
inc_counter_np(SharedRuntime::_checkcast_array_copy_ctr, O3, O4);
__ retl();
__ delayed()->nop(); // return value in 00
return start;
}
// Generate 'unsafe' array copy stub
// Though just as safe as the other stubs, it takes an unscaled
// size_t argument instead of an element count.
//
// Arguments for generated stub:
// from: O0
// to: O1
// count: O2 byte count, treated as ssize_t, can be zero
//
// Examines the alignment of the operands and dispatches
// to a long, int, short, or byte copy loop.
//
address generate_unsafe_copy(const char* name,
address byte_copy_entry,
address short_copy_entry,
address int_copy_entry,
address long_copy_entry) {
const Register O0_from = O0; // source array address
const Register O1_to = O1; // destination array address
const Register O2_count = O2; // elements count
const Register G1_bits = G1; // test copy of low bits
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", name);
address start = __ pc();
// bump this on entry, not on exit:
inc_counter_np(SharedRuntime::_unsafe_array_copy_ctr, G1, G3);
__ or3(O0_from, O1_to, G1_bits);
__ or3(O2_count, G1_bits, G1_bits);
__ btst(BytesPerLong-1, G1_bits);
__ br(Assembler::zero, true, Assembler::pt,
long_copy_entry, relocInfo::runtime_call_type);
// scale the count on the way out:
__ delayed()->srax(O2_count, LogBytesPerLong, O2_count);
__ btst(BytesPerInt-1, G1_bits);
__ br(Assembler::zero, true, Assembler::pt,
int_copy_entry, relocInfo::runtime_call_type);
// scale the count on the way out:
__ delayed()->srax(O2_count, LogBytesPerInt, O2_count);
__ btst(BytesPerShort-1, G1_bits);
__ br(Assembler::zero, true, Assembler::pt,
short_copy_entry, relocInfo::runtime_call_type);
// scale the count on the way out:
__ delayed()->srax(O2_count, LogBytesPerShort, O2_count);
__ br(Assembler::always, false, Assembler::pt,
byte_copy_entry, relocInfo::runtime_call_type);
__ delayed()->nop();
return start;
}
// Perform range checks on the proposed arraycopy.
// Kills the two temps, but nothing else.
// Also, clean the sign bits of src_pos and dst_pos.
void arraycopy_range_checks(Register src, // source array oop (O0)
Register src_pos, // source position (O1)
Register dst, // destination array oo (O2)
Register dst_pos, // destination position (O3)
Register length, // length of copy (O4)
Register temp1, Register temp2,
Label& L_failed) {
BLOCK_COMMENT("arraycopy_range_checks:");
// if (src_pos + length > arrayOop(src)->length() ) FAIL;
const Register array_length = temp1; // scratch
const Register end_pos = temp2; // scratch
// Note: This next instruction may be in the delay slot of a branch:
__ add(length, src_pos, end_pos); // src_pos + length
__ lduw(src, arrayOopDesc::length_offset_in_bytes(), array_length);
__ cmp(end_pos, array_length);
__ br(Assembler::greater, false, Assembler::pn, L_failed);
// if (dst_pos + length > arrayOop(dst)->length() ) FAIL;
__ delayed()->add(length, dst_pos, end_pos); // dst_pos + length
__ lduw(dst, arrayOopDesc::length_offset_in_bytes(), array_length);
__ cmp(end_pos, array_length);
__ br(Assembler::greater, false, Assembler::pn, L_failed);
// Have to clean up high 32-bits of 'src_pos' and 'dst_pos'.
// Move with sign extension can be used since they are positive.
__ delayed()->signx(src_pos, src_pos);
__ signx(dst_pos, dst_pos);
BLOCK_COMMENT("arraycopy_range_checks done");
}
//
// Generate generic array copy stubs
//
// Input:
// O0 - src oop
// O1 - src_pos
// O2 - dst oop
// O3 - dst_pos
// O4 - element count
//
// Output:
// O0 == 0 - success
// O0 == -1 - need to call System.arraycopy
//
address generate_generic_copy(const char *name,
address entry_jbyte_arraycopy,
address entry_jshort_arraycopy,
address entry_jint_arraycopy,
address entry_oop_arraycopy,
address entry_jlong_arraycopy,
address entry_checkcast_arraycopy) {
Label L_failed, L_objArray;
// Input registers
const Register src = O0; // source array oop
const Register src_pos = O1; // source position
const Register dst = O2; // destination array oop
const Register dst_pos = O3; // destination position
const Register length = O4; // elements count
// registers used as temp
const Register G3_src_klass = G3; // source array klass
const Register G4_dst_klass = G4; // destination array klass
const Register G5_lh = G5; // layout handler
const Register O5_temp = O5;
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", name);
address start = __ pc();
// bump this on entry, not on exit:
inc_counter_np(SharedRuntime::_generic_array_copy_ctr, G1, G3);
// In principle, the int arguments could be dirty.
//assert_clean_int(src_pos, G1);
//assert_clean_int(dst_pos, G1);
//assert_clean_int(length, G1);
//-----------------------------------------------------------------------
// Assembler stubs will be used for this call to arraycopy
// if the following conditions are met:
//
// (1) src and dst must not be null.
// (2) src_pos must not be negative.
// (3) dst_pos must not be negative.
// (4) length must not be negative.
// (5) src klass and dst klass should be the same and not NULL.
// (6) src and dst should be arrays.
// (7) src_pos + length must not exceed length of src.
// (8) dst_pos + length must not exceed length of dst.
BLOCK_COMMENT("arraycopy initial argument checks");
// if (src == NULL) return -1;
__ br_null(src, false, Assembler::pn, L_failed);
// if (src_pos < 0) return -1;
__ delayed()->tst(src_pos);
__ br(Assembler::negative, false, Assembler::pn, L_failed);
__ delayed()->nop();
// if (dst == NULL) return -1;
__ br_null(dst, false, Assembler::pn, L_failed);
// if (dst_pos < 0) return -1;
__ delayed()->tst(dst_pos);
__ br(Assembler::negative, false, Assembler::pn, L_failed);
// if (length < 0) return -1;
__ delayed()->tst(length);
__ br(Assembler::negative, false, Assembler::pn, L_failed);
BLOCK_COMMENT("arraycopy argument klass checks");
// get src->klass()
if (UseCompressedOops) {
__ delayed()->nop(); // ??? not good
__ load_klass(src, G3_src_klass);
} else {
__ delayed()->ld_ptr(src, oopDesc::klass_offset_in_bytes(), G3_src_klass);
}
#ifdef ASSERT
// assert(src->klass() != NULL);
BLOCK_COMMENT("assert klasses not null");
{ Label L_a, L_b;
__ br_notnull_short(G3_src_klass, Assembler::pt, L_b); // it is broken if klass is NULL
__ bind(L_a);
__ stop("broken null klass");
__ bind(L_b);
__ load_klass(dst, G4_dst_klass);
__ br_null(G4_dst_klass, false, Assembler::pn, L_a); // this would be broken also
__ delayed()->mov(G0, G4_dst_klass); // scribble the temp
BLOCK_COMMENT("assert done");
}
#endif
// Load layout helper
//
// |array_tag| | header_size | element_type | |log2_element_size|
// 32 30 24 16 8 2 0
//
// array_tag: typeArray = 0x3, objArray = 0x2, non-array = 0x0
//
int lh_offset = klassOopDesc::header_size() * HeapWordSize +
Klass::layout_helper_offset_in_bytes();
// Load 32-bits signed value. Use br() instruction with it to check icc.
__ lduw(G3_src_klass, lh_offset, G5_lh);
if (UseCompressedOops) {
__ load_klass(dst, G4_dst_klass);
}
// Handle objArrays completely differently...
juint objArray_lh = Klass::array_layout_helper(T_OBJECT);
__ set(objArray_lh, O5_temp);
__ cmp(G5_lh, O5_temp);
__ br(Assembler::equal, false, Assembler::pt, L_objArray);
if (UseCompressedOops) {
__ delayed()->nop();
} else {
__ delayed()->ld_ptr(dst, oopDesc::klass_offset_in_bytes(), G4_dst_klass);
}
// if (src->klass() != dst->klass()) return -1;
__ cmp_and_brx_short(G3_src_klass, G4_dst_klass, Assembler::notEqual, Assembler::pn, L_failed);
// if (!src->is_Array()) return -1;
__ cmp(G5_lh, Klass::_lh_neutral_value); // < 0
__ br(Assembler::greaterEqual, false, Assembler::pn, L_failed);
// At this point, it is known to be a typeArray (array_tag 0x3).
#ifdef ASSERT
__ delayed()->nop();
{ Label L;
jint lh_prim_tag_in_place = (Klass::_lh_array_tag_type_value << Klass::_lh_array_tag_shift);
__ set(lh_prim_tag_in_place, O5_temp);
__ cmp(G5_lh, O5_temp);
__ br(Assembler::greaterEqual, false, Assembler::pt, L);
__ delayed()->nop();
__ stop("must be a primitive array");
__ bind(L);
}
#else
__ delayed(); // match next insn to prev branch
#endif
arraycopy_range_checks(src, src_pos, dst, dst_pos, length,
O5_temp, G4_dst_klass, L_failed);
// typeArrayKlass
//
// src_addr = (src + array_header_in_bytes()) + (src_pos << log2elemsize);
// dst_addr = (dst + array_header_in_bytes()) + (dst_pos << log2elemsize);
//
const Register G4_offset = G4_dst_klass; // array offset
const Register G3_elsize = G3_src_klass; // log2 element size
__ srl(G5_lh, Klass::_lh_header_size_shift, G4_offset);
__ and3(G4_offset, Klass::_lh_header_size_mask, G4_offset); // array_offset
__ add(src, G4_offset, src); // src array offset
__ add(dst, G4_offset, dst); // dst array offset
__ and3(G5_lh, Klass::_lh_log2_element_size_mask, G3_elsize); // log2 element size
// next registers should be set before the jump to corresponding stub
const Register from = O0; // source array address
const Register to = O1; // destination array address
const Register count = O2; // elements count
// 'from', 'to', 'count' registers should be set in this order
// since they are the same as 'src', 'src_pos', 'dst'.
BLOCK_COMMENT("scale indexes to element size");
__ sll_ptr(src_pos, G3_elsize, src_pos);
__ sll_ptr(dst_pos, G3_elsize, dst_pos);
__ add(src, src_pos, from); // src_addr
__ add(dst, dst_pos, to); // dst_addr
BLOCK_COMMENT("choose copy loop based on element size");
__ cmp(G3_elsize, 0);
__ br(Assembler::equal, true, Assembler::pt, entry_jbyte_arraycopy);
__ delayed()->signx(length, count); // length
__ cmp(G3_elsize, LogBytesPerShort);
__ br(Assembler::equal, true, Assembler::pt, entry_jshort_arraycopy);
__ delayed()->signx(length, count); // length
__ cmp(G3_elsize, LogBytesPerInt);
__ br(Assembler::equal, true, Assembler::pt, entry_jint_arraycopy);
__ delayed()->signx(length, count); // length
#ifdef ASSERT
{ Label L;
__ cmp_and_br_short(G3_elsize, LogBytesPerLong, Assembler::equal, Assembler::pt, L);
__ stop("must be long copy, but elsize is wrong");
__ bind(L);
}
#endif
__ br(Assembler::always, false, Assembler::pt, entry_jlong_arraycopy);
__ delayed()->signx(length, count); // length
// objArrayKlass
__ BIND(L_objArray);
// live at this point: G3_src_klass, G4_dst_klass, src[_pos], dst[_pos], length
Label L_plain_copy, L_checkcast_copy;
// test array classes for subtyping
__ cmp(G3_src_klass, G4_dst_klass); // usual case is exact equality
__ brx(Assembler::notEqual, true, Assembler::pn, L_checkcast_copy);
__ delayed()->lduw(G4_dst_klass, lh_offset, O5_temp); // hoisted from below
// Identically typed arrays can be copied without element-wise checks.
arraycopy_range_checks(src, src_pos, dst, dst_pos, length,
O5_temp, G5_lh, L_failed);
__ add(src, arrayOopDesc::base_offset_in_bytes(T_OBJECT), src); //src offset
__ add(dst, arrayOopDesc::base_offset_in_bytes(T_OBJECT), dst); //dst offset
__ sll_ptr(src_pos, LogBytesPerHeapOop, src_pos);
__ sll_ptr(dst_pos, LogBytesPerHeapOop, dst_pos);
__ add(src, src_pos, from); // src_addr
__ add(dst, dst_pos, to); // dst_addr
__ BIND(L_plain_copy);
__ br(Assembler::always, false, Assembler::pt, entry_oop_arraycopy);
__ delayed()->signx(length, count); // length
__ BIND(L_checkcast_copy);
// live at this point: G3_src_klass, G4_dst_klass
{
// Before looking at dst.length, make sure dst is also an objArray.
// lduw(G4_dst_klass, lh_offset, O5_temp); // hoisted to delay slot
__ cmp(G5_lh, O5_temp);
__ br(Assembler::notEqual, false, Assembler::pn, L_failed);
// It is safe to examine both src.length and dst.length.
__ delayed(); // match next insn to prev branch
arraycopy_range_checks(src, src_pos, dst, dst_pos, length,
O5_temp, G5_lh, L_failed);
// Marshal the base address arguments now, freeing registers.
__ add(src, arrayOopDesc::base_offset_in_bytes(T_OBJECT), src); //src offset
__ add(dst, arrayOopDesc::base_offset_in_bytes(T_OBJECT), dst); //dst offset
__ sll_ptr(src_pos, LogBytesPerHeapOop, src_pos);
__ sll_ptr(dst_pos, LogBytesPerHeapOop, dst_pos);
__ add(src, src_pos, from); // src_addr
__ add(dst, dst_pos, to); // dst_addr
__ signx(length, count); // length (reloaded)
Register sco_temp = O3; // this register is free now
assert_different_registers(from, to, count, sco_temp,
G4_dst_klass, G3_src_klass);
// Generate the type check.
int sco_offset = (klassOopDesc::header_size() * HeapWordSize +
Klass::super_check_offset_offset_in_bytes());
__ lduw(G4_dst_klass, sco_offset, sco_temp);
generate_type_check(G3_src_klass, sco_temp, G4_dst_klass,
O5_temp, L_plain_copy);
// Fetch destination element klass from the objArrayKlass header.
int ek_offset = (klassOopDesc::header_size() * HeapWordSize +
objArrayKlass::element_klass_offset_in_bytes());
// the checkcast_copy loop needs two extra arguments:
__ ld_ptr(G4_dst_klass, ek_offset, O4); // dest elem klass
// lduw(O4, sco_offset, O3); // sco of elem klass
__ br(Assembler::always, false, Assembler::pt, entry_checkcast_arraycopy);
__ delayed()->lduw(O4, sco_offset, O3);
}
__ BIND(L_failed);
__ retl();
__ delayed()->sub(G0, 1, O0); // return -1
return start;
}
void generate_arraycopy_stubs() {
address entry;
address entry_jbyte_arraycopy;
address entry_jshort_arraycopy;
address entry_jint_arraycopy;
address entry_oop_arraycopy;
address entry_jlong_arraycopy;
address entry_checkcast_arraycopy;
//*** jbyte
// Always need aligned and unaligned versions
StubRoutines::_jbyte_disjoint_arraycopy = generate_disjoint_byte_copy(false, &entry,
"jbyte_disjoint_arraycopy");
StubRoutines::_jbyte_arraycopy = generate_conjoint_byte_copy(false, entry,
&entry_jbyte_arraycopy,
"jbyte_arraycopy");
StubRoutines::_arrayof_jbyte_disjoint_arraycopy = generate_disjoint_byte_copy(true, &entry,
"arrayof_jbyte_disjoint_arraycopy");
StubRoutines::_arrayof_jbyte_arraycopy = generate_conjoint_byte_copy(true, entry, NULL,
"arrayof_jbyte_arraycopy");
//*** jshort
// Always need aligned and unaligned versions
StubRoutines::_jshort_disjoint_arraycopy = generate_disjoint_short_copy(false, &entry,
"jshort_disjoint_arraycopy");
StubRoutines::_jshort_arraycopy = generate_conjoint_short_copy(false, entry,
&entry_jshort_arraycopy,
"jshort_arraycopy");
StubRoutines::_arrayof_jshort_disjoint_arraycopy = generate_disjoint_short_copy(true, &entry,
"arrayof_jshort_disjoint_arraycopy");
StubRoutines::_arrayof_jshort_arraycopy = generate_conjoint_short_copy(true, entry, NULL,
"arrayof_jshort_arraycopy");
//*** jint
// Aligned versions
StubRoutines::_arrayof_jint_disjoint_arraycopy = generate_disjoint_int_copy(true, &entry,
"arrayof_jint_disjoint_arraycopy");
StubRoutines::_arrayof_jint_arraycopy = generate_conjoint_int_copy(true, entry, &entry_jint_arraycopy,
"arrayof_jint_arraycopy");
#ifdef _LP64
// In 64 bit we need both aligned and unaligned versions of jint arraycopy.
// entry_jint_arraycopy always points to the unaligned version (notice that we overwrite it).
StubRoutines::_jint_disjoint_arraycopy = generate_disjoint_int_copy(false, &entry,
"jint_disjoint_arraycopy");
StubRoutines::_jint_arraycopy = generate_conjoint_int_copy(false, entry,
&entry_jint_arraycopy,
"jint_arraycopy");
#else
// In 32 bit jints are always HeapWordSize aligned, so always use the aligned version
// (in fact in 32bit we always have a pre-loop part even in the aligned version,
// because it uses 64-bit loads/stores, so the aligned flag is actually ignored).
StubRoutines::_jint_disjoint_arraycopy = StubRoutines::_arrayof_jint_disjoint_arraycopy;
StubRoutines::_jint_arraycopy = StubRoutines::_arrayof_jint_arraycopy;
#endif
//*** jlong
// It is always aligned
StubRoutines::_arrayof_jlong_disjoint_arraycopy = generate_disjoint_long_copy(true, &entry,
"arrayof_jlong_disjoint_arraycopy");
StubRoutines::_arrayof_jlong_arraycopy = generate_conjoint_long_copy(true, entry, &entry_jlong_arraycopy,
"arrayof_jlong_arraycopy");
StubRoutines::_jlong_disjoint_arraycopy = StubRoutines::_arrayof_jlong_disjoint_arraycopy;
StubRoutines::_jlong_arraycopy = StubRoutines::_arrayof_jlong_arraycopy;
//*** oops
// Aligned versions
StubRoutines::_arrayof_oop_disjoint_arraycopy = generate_disjoint_oop_copy(true, &entry,
"arrayof_oop_disjoint_arraycopy");
StubRoutines::_arrayof_oop_arraycopy = generate_conjoint_oop_copy(true, entry, &entry_oop_arraycopy,
"arrayof_oop_arraycopy");
// Aligned versions without pre-barriers
StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit = generate_disjoint_oop_copy(true, &entry,
"arrayof_oop_disjoint_arraycopy_uninit",
/*dest_uninitialized*/true);
StubRoutines::_arrayof_oop_arraycopy_uninit = generate_conjoint_oop_copy(true, entry, NULL,
"arrayof_oop_arraycopy_uninit",
/*dest_uninitialized*/true);
#ifdef _LP64
if (UseCompressedOops) {
// With compressed oops we need unaligned versions, notice that we overwrite entry_oop_arraycopy.
StubRoutines::_oop_disjoint_arraycopy = generate_disjoint_oop_copy(false, &entry,
"oop_disjoint_arraycopy");
StubRoutines::_oop_arraycopy = generate_conjoint_oop_copy(false, entry, &entry_oop_arraycopy,
"oop_arraycopy");
// Unaligned versions without pre-barriers
StubRoutines::_oop_disjoint_arraycopy_uninit = generate_disjoint_oop_copy(false, &entry,
"oop_disjoint_arraycopy_uninit",
/*dest_uninitialized*/true);
StubRoutines::_oop_arraycopy_uninit = generate_conjoint_oop_copy(false, entry, NULL,
"oop_arraycopy_uninit",
/*dest_uninitialized*/true);
} else
#endif
{
// oop arraycopy is always aligned on 32bit and 64bit without compressed oops
StubRoutines::_oop_disjoint_arraycopy = StubRoutines::_arrayof_oop_disjoint_arraycopy;
StubRoutines::_oop_arraycopy = StubRoutines::_arrayof_oop_arraycopy;
StubRoutines::_oop_disjoint_arraycopy_uninit = StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit;
StubRoutines::_oop_arraycopy_uninit = StubRoutines::_arrayof_oop_arraycopy_uninit;
}
StubRoutines::_checkcast_arraycopy = generate_checkcast_copy("checkcast_arraycopy", &entry_checkcast_arraycopy);
StubRoutines::_checkcast_arraycopy_uninit = generate_checkcast_copy("checkcast_arraycopy_uninit", NULL,
/*dest_uninitialized*/true);
StubRoutines::_unsafe_arraycopy = generate_unsafe_copy("unsafe_arraycopy",
entry_jbyte_arraycopy,
entry_jshort_arraycopy,
entry_jint_arraycopy,
entry_jlong_arraycopy);
StubRoutines::_generic_arraycopy = generate_generic_copy("generic_arraycopy",
entry_jbyte_arraycopy,
entry_jshort_arraycopy,
entry_jint_arraycopy,
entry_oop_arraycopy,
entry_jlong_arraycopy,
entry_checkcast_arraycopy);
StubRoutines::_jbyte_fill = generate_fill(T_BYTE, false, "jbyte_fill");
StubRoutines::_jshort_fill = generate_fill(T_SHORT, false, "jshort_fill");
StubRoutines::_jint_fill = generate_fill(T_INT, false, "jint_fill");
StubRoutines::_arrayof_jbyte_fill = generate_fill(T_BYTE, true, "arrayof_jbyte_fill");
StubRoutines::_arrayof_jshort_fill = generate_fill(T_SHORT, true, "arrayof_jshort_fill");
StubRoutines::_arrayof_jint_fill = generate_fill(T_INT, true, "arrayof_jint_fill");
}
void generate_initial() {
// Generates all stubs and initializes the entry points
//------------------------------------------------------------------------------------------------------------------------
// entry points that exist in all platforms
// Note: This is code that could be shared among different platforms - however the benefit seems to be smaller than
// the disadvantage of having a much more complicated generator structure. See also comment in stubRoutines.hpp.
StubRoutines::_forward_exception_entry = generate_forward_exception();
StubRoutines::_call_stub_entry = generate_call_stub(StubRoutines::_call_stub_return_address);
StubRoutines::_catch_exception_entry = generate_catch_exception();
//------------------------------------------------------------------------------------------------------------------------
// entry points that are platform specific
StubRoutines::Sparc::_test_stop_entry = generate_test_stop();
StubRoutines::Sparc::_stop_subroutine_entry = generate_stop_subroutine();
StubRoutines::Sparc::_flush_callers_register_windows_entry = generate_flush_callers_register_windows();
#if !defined(COMPILER2) && !defined(_LP64)
StubRoutines::_atomic_xchg_entry = generate_atomic_xchg();
StubRoutines::_atomic_cmpxchg_entry = generate_atomic_cmpxchg();
StubRoutines::_atomic_add_entry = generate_atomic_add();
StubRoutines::_atomic_xchg_ptr_entry = StubRoutines::_atomic_xchg_entry;
StubRoutines::_atomic_cmpxchg_ptr_entry = StubRoutines::_atomic_cmpxchg_entry;
StubRoutines::_atomic_cmpxchg_long_entry = generate_atomic_cmpxchg_long();
StubRoutines::_atomic_add_ptr_entry = StubRoutines::_atomic_add_entry;
#endif // COMPILER2 !=> _LP64
// Build this early so it's available for the interpreter. The
// stub expects the required and actual type to already be in O1
// and O2 respectively.
StubRoutines::_throw_WrongMethodTypeException_entry =
generate_throw_exception("WrongMethodTypeException throw_exception",
CAST_FROM_FN_PTR(address, SharedRuntime::throw_WrongMethodTypeException),
false, G5_method_type, G3_method_handle);
}
void generate_all() {
// Generates all stubs and initializes the entry points
// Generate partial_subtype_check first here since its code depends on
// UseZeroBaseCompressedOops which is defined after heap initialization.
StubRoutines::Sparc::_partial_subtype_check = generate_partial_subtype_check();
// These entry points require SharedInfo::stack0 to be set up in non-core builds
StubRoutines::_throw_AbstractMethodError_entry = generate_throw_exception("AbstractMethodError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_AbstractMethodError), false);
StubRoutines::_throw_IncompatibleClassChangeError_entry= generate_throw_exception("IncompatibleClassChangeError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_IncompatibleClassChangeError), false);
StubRoutines::_throw_ArithmeticException_entry = generate_throw_exception("ArithmeticException throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_ArithmeticException), true);
StubRoutines::_throw_NullPointerException_entry = generate_throw_exception("NullPointerException throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_NullPointerException), true);
StubRoutines::_throw_NullPointerException_at_call_entry= generate_throw_exception("NullPointerException at call throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_NullPointerException_at_call), false);
StubRoutines::_throw_StackOverflowError_entry = generate_throw_exception("StackOverflowError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_StackOverflowError), false);
StubRoutines::_handler_for_unsafe_access_entry =
generate_handler_for_unsafe_access();
// support for verify_oop (must happen after universe_init)
StubRoutines::_verify_oop_subroutine_entry = generate_verify_oop_subroutine();
// arraycopy stubs used by compilers
generate_arraycopy_stubs();
// Don't initialize the platform math functions since sparc
// doesn't have intrinsics for these operations.
}
public:
StubGenerator(CodeBuffer* code, bool all) : StubCodeGenerator(code) {
// replace the standard masm with a special one:
_masm = new MacroAssembler(code);
_stub_count = !all ? 0x100 : 0x200;
if (all) {
generate_all();
} else {
generate_initial();
}
// make sure this stub is available for all local calls
if (_atomic_add_stub.is_unbound()) {
// generate a second time, if necessary
(void) generate_atomic_add();
}
}
private:
int _stub_count;
void stub_prolog(StubCodeDesc* cdesc) {
# ifdef ASSERT
// put extra information in the stub code, to make it more readable
#ifdef _LP64
// Write the high part of the address
// [RGV] Check if there is a dependency on the size of this prolog
__ emit_data((intptr_t)cdesc >> 32, relocInfo::none);
#endif
__ emit_data((intptr_t)cdesc, relocInfo::none);
__ emit_data(++_stub_count, relocInfo::none);
# endif
align(true);
}
void align(bool at_header = false) {
// %%%%% move this constant somewhere else
// UltraSPARC cache line size is 8 instructions:
const unsigned int icache_line_size = 32;
const unsigned int icache_half_line_size = 16;
if (at_header) {
while ((intptr_t)(__ pc()) % icache_line_size != 0) {
__ emit_data(0, relocInfo::none);
}
} else {
while ((intptr_t)(__ pc()) % icache_half_line_size != 0) {
__ nop();
}
}
}
}; // end class declaration
void StubGenerator_generate(CodeBuffer* code, bool all) {
StubGenerator g(code, all);
}