aoqi@1: /*
aoqi@1:  * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@1:  * Copyright (c) 2015, 2016, Loongson Technology. All rights reserved.
aoqi@1:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@1:  *
aoqi@1:  * This code is free software; you can redistribute it and/or modify it
aoqi@1:  * under the terms of the GNU General Public License version 2 only, as
aoqi@1:  * published by the Free Software Foundation.
aoqi@1:  *
aoqi@1:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@1:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@1:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@1:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@1:  * accompanied this code).
aoqi@1:  *
aoqi@1:  * You should have received a copy of the GNU General Public License version
aoqi@1:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@1:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@1:  *
aoqi@1:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@1:  * or visit www.oracle.com if you need additional information or have any
aoqi@1:  * questions.
aoqi@1:  *
aoqi@1:  */
aoqi@1: 
aoqi@1: #include "precompiled.hpp"
aoqi@1: #include "c1/c1_MacroAssembler.hpp"
aoqi@1: #include "c1/c1_Runtime1.hpp"
aoqi@1: #include "classfile/systemDictionary.hpp"
aoqi@1: #include "gc_interface/collectedHeap.hpp"
aoqi@1: #include "interpreter/interpreter.hpp"
aoqi@1: #include "oops/arrayOop.hpp"
aoqi@1: #include "oops/markOop.hpp"
aoqi@1: #include "runtime/basicLock.hpp"
aoqi@1: #include "runtime/biasedLocking.hpp"
aoqi@1: #include "runtime/os.hpp"
aoqi@1: #include "runtime/stubRoutines.hpp"
aoqi@1: 
aoqi@1: int C1_MacroAssembler::lock_object(Register hdr, Register obj, Register disp_hdr,Register scratch, Label& slow_case) {
aoqi@1:   const int aligned_mask = BytesPerWord -1;
aoqi@1:   const int hdr_offset = oopDesc::mark_offset_in_bytes();
aoqi@1: 
aoqi@1:   // hdr is just a temperary register, it cannot be AT, however
aoqi@1:   if ( hdr == NOREG ) {
aoqi@1:     hdr = T8;
aoqi@1:   }
aoqi@1: 
aoqi@1:   assert_different_registers(hdr, obj, disp_hdr);
aoqi@1:   Label done;
aoqi@1:   // The following move must be the first instruction of emitted since debug
aoqi@1:   // information may be generated for it.
aoqi@1:   // Load object header
aoqi@1:   int null_check_offset = -1;
aoqi@1:   verify_oop(obj);
aoqi@1: 
aoqi@1:   // save object being locked into the BasicObjectLock
aoqi@1:   st_ptr(obj, disp_hdr, BasicObjectLock::obj_offset_in_bytes());
aoqi@1:   if (UseBiasedLocking) {
aoqi@1:     assert(scratch != noreg, "should have scratch register at this point");
aoqi@1:     null_check_offset = biased_locking_enter(disp_hdr, obj, hdr, scratch, false, 
aoqi@1: 	done, &slow_case);
aoqi@1:   } else {
aoqi@1:     null_check_offset = offset();
aoqi@1:   }
aoqi@1: 
aoqi@1:   // Load object header
aoqi@1:   ld_ptr(hdr, obj, hdr_offset); 
aoqi@1:   // and mark it as unlocked
aoqi@1:   ori(hdr, hdr, markOopDesc::unlocked_value);
aoqi@1:   // save unlocked object header into the displaced header location on the stack
aoqi@1:   sd(hdr, disp_hdr, 0);
aoqi@1: 
aoqi@1:   // test if object header is still the same (i.e. unlocked), and if so, store the
aoqi@1:   // displaced header address in the object header - if it is not the same, get the
aoqi@1:   // object header instead
aoqi@1:   //if (os::is_MP()) MacroAssembler::lock(); // must be immediately before cmpxchg!
aoqi@1:   cmpxchg(disp_hdr, Address(obj, hdr_offset), hdr);
aoqi@1:   // if the object header was the same, we're done
aoqi@1:   if (PrintBiasedLockingStatistics) {
aoqi@29:     Label L;
aoqi@29:     beq(AT, R0, L);
aoqi@29:     delayed()->nop();
aoqi@29:     push(T0);
aoqi@29:     push(T1);
aoqi@29:     li(T0, (address) BiasedLocking::fast_path_entry_count_addr());
aoqi@29:     lw(T1, T0, 0);
aoqi@29:     addi(T1, T1, 1);
aoqi@29:     sw(T1, T0, 0);
aoqi@29:     pop(T1);
aoqi@29:     pop(T0);
aoqi@29:     bind(L);
aoqi@1:   }
aoqi@1: 
aoqi@1: 
aoqi@1:   bne(AT, R0, done);
aoqi@1:   delayed()->nop();
aoqi@1:   // if the object header was not the same, it is now in the hdr register
aoqi@1:   // => test if it is a stack pointer into the same stack (recursive locking), i.e.:
aoqi@1:   //
aoqi@1:   // 1) (hdr & aligned_mask) == 0
aoqi@1:   // 2) SP <= hdr
aoqi@1:   // 3) hdr <= SP + page_size
aoqi@1:   //
aoqi@1:   // these 3 tests can be done by evaluating the following expression:
aoqi@1:   //
aoqi@1:   // (hdr - SP) & (aligned_mask - page_size)
aoqi@1:   //
aoqi@1:   // assuming both the stack pointer and page_size have their least
aoqi@1:   // significant 2 bits cleared and page_size is a power of 2
aoqi@1:   sub(hdr, hdr, SP);
aoqi@1:   move(AT, aligned_mask - os::vm_page_size());
aoqi@1:   andr(hdr, hdr, AT);
aoqi@1:   // for recursive locking, the result is zero => save it in the displaced header
aoqi@1:   // location (NULL in the displaced hdr location indicates recursive locking)
aoqi@1:   st_ptr(hdr, disp_hdr, 0);
aoqi@1:   // otherwise we don't care about the result and handle locking via runtime call
aoqi@1:   bne_far(hdr, R0, slow_case);
aoqi@1:   delayed()->nop();
aoqi@1:   // done
aoqi@1:   bind(done);
aoqi@1:   return null_check_offset;
aoqi@1: }
aoqi@1: 
aoqi@1: 
aoqi@1: void C1_MacroAssembler::unlock_object(Register hdr, Register obj, Register disp_hdr, Label& slow_case) {
aoqi@1:   const int aligned_mask = BytesPerWord -1;
aoqi@1:   const int hdr_offset = oopDesc::mark_offset_in_bytes();
aoqi@1: 
aoqi@1:   // hdr is just a temparay register, however, it cannot be AT
aoqi@1:   if ( hdr == NOREG ) {
aoqi@1:     hdr = T8;
aoqi@1:   }
aoqi@1: 
aoqi@1:   assert_different_registers(hdr, obj, disp_hdr);
aoqi@1:   assert(BytesPerWord == 8, "adjust aligned_mask and code");
aoqi@1:   Label done;
aoqi@1:   if (UseBiasedLocking) {
aoqi@1:     // load object
aoqi@1:     ld_ptr(obj, Address(disp_hdr, BasicObjectLock::obj_offset_in_bytes()));
aoqi@1:     biased_locking_exit(obj, hdr, done);
aoqi@1:   }
aoqi@1: 
aoqi@1: 
aoqi@1: 
aoqi@1:   // load displaced header
aoqi@1:   ld_ptr(hdr, disp_hdr, 0);
aoqi@1:   // if the loaded hdr is NULL we had recursive locking
aoqi@1:   // if we had recursive locking, we are done
aoqi@1:   beq(hdr, R0, done);
aoqi@1:   delayed()->nop();
aoqi@1:   // load object
aoqi@1:   if(!UseBiasedLocking){
aoqi@1:     ld_ptr(obj, disp_hdr, BasicObjectLock::obj_offset_in_bytes());
aoqi@1:   }
aoqi@1: 
aoqi@1:   verify_oop(obj);
aoqi@1:   // test if object header is pointing to the displaced header, and if so, restore
aoqi@1:   // the displaced header in the object - if the object header is not pointing to
aoqi@1:   // the displaced header, get the object header instead
aoqi@1:   //if (os::is_MP()) MacroAssembler::lock(); // must be immediately before cmpxchg!
aoqi@1:   cmpxchg(hdr, Address(obj, hdr_offset), disp_hdr);
aoqi@1:   // if the object header was not pointing to the displaced header,
aoqi@1:   // we do unlocking via runtime call
aoqi@1:   beq_far(AT, R0, slow_case);
aoqi@1:   delayed()->nop();
aoqi@1:   // done
aoqi@1:   bind(done);
aoqi@1: }
aoqi@1: 
aoqi@1: 
aoqi@1: 
aoqi@1: // Defines obj, preserves var_size_in_bytes
aoqi@1: void C1_MacroAssembler::try_allocate(Register obj, Register var_size_in_bytes, int con_size_in_bytes, Register t1, Register t2, Label& slow_case) {
aoqi@1:   if (UseTLAB) {
aoqi@1:     tlab_allocate(obj, var_size_in_bytes, con_size_in_bytes, t1, t2, slow_case);
aoqi@1:   } else {
aoqi@1:     eden_allocate(obj, var_size_in_bytes, con_size_in_bytes, t1, t2, slow_case);
aoqi@1:   }
aoqi@1: }
aoqi@1: 
aoqi@1: void C1_MacroAssembler::initialize_header(Register obj, Register klass, Register len, Register t1 , Register t2) {
aoqi@1:   assert_different_registers(obj, klass, len, AT);
aoqi@1: 
aoqi@1:   if (UseBiasedLocking && !len->is_valid()) {
aoqi@1:     assert_different_registers(obj, klass, len, t1, t2);
aoqi@1:     ld_ptr(t1, klass, in_bytes(Klass::prototype_header_offset()));
aoqi@1:     st_ptr(t1, obj, oopDesc::mark_offset_in_bytes());
aoqi@1:   } else {
aoqi@1:     li(AT, (intptr_t)markOopDesc::prototype());
aoqi@1:     st_ptr(AT, obj, oopDesc::mark_offset_in_bytes());
aoqi@1:   }	
aoqi@1:   //st_ptr(klass, obj, oopDesc::klass_offset_in_bytes());
aoqi@1: #ifdef _LP64
aoqi@1:   if (UseCompressedOops) {
aoqi@1:     move(AT, klass);
aoqi@1:     store_klass(obj, AT);
aoqi@1:   } else
aoqi@1: #endif
aoqi@1:   {
aoqi@1:     st_ptr(klass, obj, oopDesc::klass_offset_in_bytes());
aoqi@1:   }
aoqi@1: 
aoqi@1:   if (len->is_valid()) {
aoqi@1:     sw(len, obj, arrayOopDesc::length_offset_in_bytes());
aoqi@1:   }
aoqi@1: #ifdef _LP64
aoqi@1:   else if (UseCompressedOops) {
aoqi@1:     store_klass_gap(obj, R0);
aoqi@1:   }
aoqi@1:   
aoqi@1: #endif
aoqi@1: }
aoqi@1: 
aoqi@1: // preserves obj, destroys len_in_bytes
aoqi@1: void C1_MacroAssembler::initialize_body(Register obj, Register len_in_bytes, int hdr_size_in_bytes, Register t1) {
aoqi@1:   Label done;
aoqi@1:   Register ptr = t1;
aoqi@1:   assert_different_registers(obj, ptr, len_in_bytes);
aoqi@1:   assert((hdr_size_in_bytes & (BytesPerWord - 1)) == 0, 
aoqi@1:       "header size is not a multiple of BytesPerWord");
aoqi@1:   Register index = len_in_bytes;
aoqi@1: 
aoqi@1: //tty->print_cr("C1_MacroAssembler::initialize_body LEN=0x%x, hdr_size=0x%x", len_in_bytes, hdr_size_in_bytes);
aoqi@1:   assert(is_simm16(hdr_size_in_bytes), "change this code");
aoqi@1:   addi(index, index, - hdr_size_in_bytes);
aoqi@1:   beq(index, R0, done);
aoqi@1:   delayed();
aoqi@1: 
aoqi@1:   // initialize topmost word, divide index by 2, check if odd and test if zero
aoqi@1:   // note: for the remaining code to work, index must be a multiple of BytesPerWord
aoqi@1: #ifdef ASSERT
aoqi@1:   { 
aoqi@1:     Label L;
aoqi@1:     andi(AT, index, BytesPerWord - 1);
aoqi@1:     beq(AT, R0, L);
aoqi@1:     delayed()->nop();
aoqi@1:     stop("index is not a multiple of BytesPerWord");
aoqi@1:     bind(L);
aoqi@1:   }
aoqi@1: #endif
aoqi@1:   // index could have been not a multiple of 8 (i.e., bit 2 was set)
aoqi@1:   { 
aoqi@1:     Label even;
aoqi@1:     // note: if index was a multiple of 8, than it cannot
aoqi@1:     //       be 0 now otherwise it must have been 0 before
aoqi@1:     //       => if it is even, we don't need to check for 0 again
aoqi@1: #ifdef _LP64
aoqi@1:     andi(AT, index, 8);
aoqi@1:     shr(index, 4);
aoqi@1:     shl(index, 4);
aoqi@1: #else
aoqi@1:     andi(AT, index, 4);
aoqi@1:     shr(index, 3);
aoqi@1:     shl(index, 3);
aoqi@1: #endif
aoqi@1:     beq(AT, R0, even);
aoqi@1:     delayed()->add(ptr, obj, index);
aoqi@1:     // clear topmost word (no jump needed if conditional assignment would work here)
aoqi@1:     st_ptr(R0, ptr, hdr_size_in_bytes); 
aoqi@1:     // index could be 0 now, need to check again
aoqi@1:     beq(index, R0, done);
aoqi@1:     delayed()->nop();
aoqi@1:     bind(even);
aoqi@1:   }
aoqi@1:   // initialize remaining object fields: edx is a multiple of 2 now
aoqi@1:   { 
aoqi@1:     Label loop;
aoqi@1:     bind(loop);
aoqi@1:     st_ptr(R0, ptr, hdr_size_in_bytes - 1*BytesPerWord);
aoqi@1:     st_ptr(R0, ptr, hdr_size_in_bytes - 2*BytesPerWord);
aoqi@1: 
aoqi@1:     addi(index, index, - 2 * wordSize);
aoqi@1:     bne(index, R0, loop);
aoqi@1:     delayed()->addi(ptr, ptr, - 2 * wordSize);
aoqi@1:   }
aoqi@1: 
aoqi@1:   // done
aoqi@1:   bind(done);
aoqi@1: }
aoqi@1: 
aoqi@1: void C1_MacroAssembler::allocate_object(Register obj, Register t1, Register t2, int header_size, int object_size, Register klass, Label& slow_case) {
aoqi@1:   //assert(obj == rax, "obj must be in rax, for cmpxchg");
aoqi@1:   assert(obj != t1 && obj != t2 && t1 != t2, "registers must be different"); // XXX really?
aoqi@1:   assert(header_size >= 0 && object_size >= header_size, "illegal sizes");
aoqi@1: 
aoqi@1:   try_allocate(obj, noreg, object_size * BytesPerWord, t1, t2, slow_case);
aoqi@1: 
aoqi@1:   initialize_object(obj, klass, noreg, object_size * HeapWordSize, t1, t2);
aoqi@1: }
aoqi@1: 
aoqi@1: void C1_MacroAssembler::initialize_object(Register obj, Register klass, Register var_size_in_bytes, int con_size_in_bytes, Register t1, Register t2) {
aoqi@1: 	assert((con_size_in_bytes & MinObjAlignmentInBytesMask) == 0,
aoqi@1: 			"con_size_in_bytes is not multiple of alignment");
aoqi@1: 	//Merged from b25
aoqi@1: 	const int hdr_size_in_bytes = instanceOopDesc::header_size() * HeapWordSize;
aoqi@1: 
aoqi@1: 	//  initialize_header(obj, klass, NOREG);
aoqi@1: 	initialize_header(obj, klass, NOREG,t1,t2);
aoqi@1: 
aoqi@1: 	// clear rest of allocated space
aoqi@1: 	const Register index = t2;
aoqi@1: 	//FIXME, x86 changed the value in jdk6 
aoqi@1: 	// const int threshold = hdr_size_in_bytes + 36;   
aoqi@1: 	// // approximate break even point for code size (see comments below)
aoqi@1: 	const int threshold = 6 * BytesPerWord;   
aoqi@1: 	// approximate break even point for code size (see comments below)
aoqi@1: 	if (var_size_in_bytes != NOREG) {
aoqi@1: 		move(index, var_size_in_bytes);
aoqi@1: 		initialize_body(obj, index, hdr_size_in_bytes, t1);
aoqi@1: 	} else if (con_size_in_bytes <= threshold) {
aoqi@1: 		// use explicit null stores
aoqi@1: 		// code size = 4*n bytes (n = number of fields to clear)
aoqi@1: 	
aoqi@1: 		for (int i = hdr_size_in_bytes; i < con_size_in_bytes; i += BytesPerWord) { 
aoqi@1: 			st_ptr(R0, obj, i);
aoqi@1: 		}
aoqi@1: 		
aoqi@1:        
aoqi@1: 
aoqi@1: 	} else if(con_size_in_bytes > hdr_size_in_bytes) {
aoqi@1: 		// use loop to null out the fields
aoqi@1: 		// code size = 32 bytes for even n (n = number of fields to clear)
aoqi@1: 		// initialize last object field first if odd number of fields
aoqi@1: 		assert( ((con_size_in_bytes - hdr_size_in_bytes) >> 3)!=0, "change code here");
aoqi@1: 
aoqi@1: #ifdef _LP64
aoqi@1: 		move(index, (con_size_in_bytes - hdr_size_in_bytes) >> 4);
aoqi@1: 		sll(t1, index, 4);
aoqi@1: #else
aoqi@1: 		move(index, (con_size_in_bytes - hdr_size_in_bytes) >> 3);
aoqi@1: 		sll(t1, index, 3);
aoqi@1: #endif
aoqi@1: 		add(t1, obj, t1);
aoqi@1: 
aoqi@1: 		// initialize last object field if constant size is odd
aoqi@1: #ifdef _LP64
aoqi@1: 		if (! UseCompressedOops)
aoqi@1: 		{
aoqi@1: 		    if (((con_size_in_bytes - hdr_size_in_bytes) & 8) != 0) {
aoqi@1: 			sd(R0, t1, hdr_size_in_bytes);
aoqi@1: 		    }
aoqi@1: 		} else if (UseCompressedOops) {
aoqi@1: 		    int extra = (con_size_in_bytes - hdr_size_in_bytes) % 16;
aoqi@1: 		    while (extra != 0) {
aoqi@1: 			sw(R0, t1, hdr_size_in_bytes + extra - 4);
aoqi@1: 			extra -= 4;
aoqi@1: 		    }
aoqi@1: 		}
aoqi@1: #else
aoqi@1: 		if (((con_size_in_bytes - hdr_size_in_bytes) & 4) != 0) {
aoqi@1: 			sw(R0, t1, hdr_size_in_bytes);
aoqi@1: 		}
aoqi@1: #endif
aoqi@1: 		// initialize remaining object fields: edx is a multiple of 2
aoqi@1: 		{ 
aoqi@1: 			Label loop;
aoqi@1: 			bind(loop);
aoqi@1: 			st_ptr(R0, t1, hdr_size_in_bytes - (1*BytesPerWord));
aoqi@1: 			st_ptr(R0, t1, hdr_size_in_bytes - (2*BytesPerWord));
aoqi@1: 			addi(index, index, -1);
aoqi@1: 			bne(index, R0, loop);
aoqi@1: 			delayed()->addi(t1, t1, - 2 * wordSize);
aoqi@1: 		}
aoqi@1: 	}
aoqi@1: 
aoqi@1: 	if (DTraceAllocProbes) {
aoqi@1: 		//assert(obj == eax, "must be");
aoqi@1: 		call(CAST_FROM_FN_PTR(address,
aoqi@1: 	             Runtime1::entry_for(Runtime1::dtrace_object_alloc_id)), relocInfo::runtime_call_type);
aoqi@1: 		delayed()->nop(); 
aoqi@1: 	}
aoqi@1: 	verify_oop(obj);
aoqi@1: }
aoqi@1: 
aoqi@1: void C1_MacroAssembler::allocate_array(Register obj, Register len, Register t1, Register t2, Register t3,int header_size, 
aoqi@1: 					int scale, Register klass, Label& slow_case) {
aoqi@1: 	assert(obj == V0, "obj must be in V0 for cmpxchg");
aoqi@1: 	assert_different_registers(obj, len, t1, t2, t3,klass, AT);
aoqi@1: 
aoqi@1:         // determine alignment mask
aoqi@1: 	assert(BytesPerWord == 8, "must be a multiple of 2 for masking code to work");
aoqi@1: 
aoqi@1:          // check for negative or excessive length
aoqi@1:          //const int max_length = 0x00FFFFFF;
aoqi@1:          //      move(AT, max_length);
aoqi@1:         move(AT, max_array_allocation_length);
aoqi@1: 	sltu(AT, AT, len);
aoqi@1: 	bne_far(AT, R0, slow_case);
aoqi@1: 	delayed()->nop();
aoqi@1: 
aoqi@1: 	const Register arr_size = t3;
aoqi@1: 	// align object end
aoqi@1: 	move(arr_size, header_size * BytesPerWord + MinObjAlignmentInBytesMask);
aoqi@1: 	sll(AT, len, scale);
aoqi@1: 	add(arr_size, arr_size, AT);
aoqi@1: 	move(AT, ~MinObjAlignmentInBytesMask);
aoqi@1: 	andr(arr_size, arr_size, AT);
aoqi@1: 
aoqi@1: 	try_allocate(obj, arr_size, 0, t1, t2, slow_case);
aoqi@1: 
aoqi@1: 	initialize_header(obj, klass, len,t1,t2);
aoqi@1: 
aoqi@1:          // clear rest of allocated space
aoqi@1: 	const Register len_zero = len;
aoqi@1: 	initialize_body(obj, arr_size, header_size * BytesPerWord, len_zero);
aoqi@1: 	if (DTraceAllocProbes) {
aoqi@1: 		// assert(obj == eax, "must be");
aoqi@1: 		call(CAST_FROM_FN_PTR(address,
aoqi@1: 		Runtime1::entry_for(Runtime1::dtrace_object_alloc_id)),
aoqi@1: 					relocInfo::runtime_call_type);
aoqi@1: 		delayed()->nop();
aoqi@1: 	}
aoqi@1: 
aoqi@1: 	verify_oop(obj);
aoqi@1: }
aoqi@1: 
aoqi@1: 
aoqi@1: void C1_MacroAssembler::inline_cache_check(Register receiver, Register iCache) {
aoqi@1: 	verify_oop(receiver);
aoqi@1: 	// explicit NULL check not needed since load from [klass_offset] causes a trap  
aoqi@1: 	// check against inline cache
aoqi@1: 	assert(!MacroAssembler::needs_explicit_null_check(oopDesc::klass_offset_in_bytes()), "must add explicit null check");
aoqi@1: 	///cmpl(iCache, Address(receiver, oopDesc::klass_offset_in_bytes())); 
aoqi@1: 	// if icache check fails, then jump to runtime routine
aoqi@1: 	// Note: RECEIVER must still contain the receiver!
aoqi@1: 	Label L;
aoqi@1: #ifdef _LP64
aoqi@1: 	//ld_ptr(AT, receiver, oopDesc::klass_offset_in_bytes());
aoqi@1: 	//add for compressedoops
aoqi@1: 	load_klass(AT, receiver);
aoqi@1: #else
aoqi@1: 	lw(AT, receiver, oopDesc::klass_offset_in_bytes());
aoqi@1: #endif
aoqi@1: 	beq(AT, iCache, L);
aoqi@1: 	delayed()->nop();
aoqi@1: 	//	jmp(Runtime1::entry_for(Runtime1::handle_ic_miss_id), relocInfo::runtime_call_type);
aoqi@1:         jmp(SharedRuntime::get_ic_miss_stub(), relocInfo::runtime_call_type);
aoqi@1: 	delayed()->nop();
aoqi@1: 	bind(L);
aoqi@1: 	// assert(UseCompressedOops, "check alignment in emit_method_entry");
aoqi@1: }
aoqi@1: /*
aoqi@1: void C1_MacroAssembler::method_exit(bool restore_frame) {
aoqi@1: 	if (restore_frame) {
aoqi@1: 		leave();
aoqi@1: 	} 
aoqi@1: 	jr(RA);
aoqi@1: 	delayed()->nop();
aoqi@1: }*/
aoqi@1: 
aoqi@1: 
aoqi@1: void C1_MacroAssembler::build_frame(int frame_size_in_bytes, int bang_size_in_bytes) {
aoqi@1:   // Make sure there is enough stack space for this method's activation.
aoqi@1:   // Note that we do this before doing an enter(). This matches the
aoqi@1:   // ordering of C2's stack overflow check / esp decrement and allows
aoqi@1:   // the SharedRuntime stack overflow handling to be consistent
aoqi@1:   // between the two compilers.
aoqi@1:   	generate_stack_overflow_check(frame_size_in_bytes);
aoqi@1: 
aoqi@1: 	enter();
aoqi@1: //FIXME
aoqi@1: #ifdef TIERED
aoqi@1:     // c2 leaves fpu stack dirty. Clean it on entry
aoqi@1:  //  if (UseSSE < 2 ) {
aoqi@1:        empty_FPU_stack();
aoqi@1:   //  }
aoqi@1: #endif // TIERED
aoqi@1:   
aoqi@1:   decrement(SP, frame_size_in_bytes); // does not emit code for frame_size == 0
aoqi@1: }
aoqi@1: 
aoqi@1: void C1_MacroAssembler::unverified_entry(Register receiver, Register ic_klass) {
aoqi@1:   if (C1Breakpoint) int3();
aoqi@1:   inline_cache_check(receiver, ic_klass);
aoqi@1: }
aoqi@1: 
aoqi@1: 
aoqi@1: void C1_MacroAssembler::verified_entry() {
aoqi@1:   if (C1Breakpoint)int3();
aoqi@1:   // build frame
aoqi@1:   verify_FPU(0, "method_entry");
aoqi@1: }
aoqi@1: 
aoqi@1: 
aoqi@1: #ifndef PRODUCT
aoqi@1: void C1_MacroAssembler::verify_stack_oop(int stack_offset) {
aoqi@1: 	if (!VerifyOops) return;
aoqi@1: 	//  verify_oop_addr(Address(esp, stack_offset));
aoqi@1: 	verify_oop_addr(Address(SP, stack_offset));
aoqi@1: }
aoqi@1: 
aoqi@1: void C1_MacroAssembler::verify_not_null_oop(Register r) {
aoqi@1: 	if (!VerifyOops) return;
aoqi@1: 	Label not_null;
aoqi@1: 	// testl(r, r);
aoqi@1: 	//jcc(Assembler::notZero, not_null);
aoqi@1: 	bne(r,R0,not_null); 
aoqi@1: 	delayed()->nop();  
aoqi@1: 	stop("non-null oop required");
aoqi@1: 	bind(not_null);
aoqi@1: 	verify_oop(r);
aoqi@1: }
aoqi@1: 
aoqi@1: void C1_MacroAssembler::invalidate_registers(bool inv_v0, bool inv_v1, bool inv_t3, bool inv_t7, bool inv_s0, bool inv_s7) {
aoqi@1: #ifdef ASSERT
aoqi@1: 	/*  if (inv_eax) movl(eax, 0xDEAD);
aoqi@1: 	    if (inv_ebx) movl(ebx, 0xDEAD);
aoqi@1: 	    if (inv_ecx) movl(ecx, 0xDEAD);
aoqi@1: 	    if (inv_edx) movl(edx, 0xDEAD);
aoqi@1: 	    if (inv_esi) movl(esi, 0xDEAD);
aoqi@1: 	    if (inv_edi) movl(edi, 0xDEAD);
aoqi@1: 	    */
aoqi@1: 	//if (inv_v0) move(V0, 0xDEAD);
aoqi@1: 	//if (inv_v1) move(V1, 0xDEAD);
aoqi@1: 	//if (inv_t3) move(T3, 0xDEAD);
aoqi@1: 	//if (inv_t7) move(T7, 0xDEAD);
aoqi@1: 	//if (inv_s0) move(S0, 0xDEAD);
aoqi@1: 	//if (inv_s7) move(S7, 0xDEAD);
aoqi@1: #endif
aoqi@1: }
aoqi@1: #endif // ifndef PRODUCT
aoqi@1: 
aoqi@1: