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src/cpu/x86/vm/c1_MacroAssembler_x86.hpp@f3de1255b035 (annotated)

src/cpu/x86/vm/c1_MacroAssembler_x86.hpp

Wed, 07 May 2008 08:06:46 -0700

author

rasbold

date

Wed, 07 May 2008 08:06:46 -0700

changeset 580

f3de1255b035

parent 435

a61af66fc99e

child 739

dc7f315e41f7

permissions

-rw-r--r--

6603011: RFE: Optimize long division
Summary: Transform long division by constant into multiply
Reviewed-by: never, kvn

duke@435	1	/*
duke@435	2	* Copyright 1999-2005 Sun Microsystems, Inc. All Rights Reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	// C1_MacroAssembler contains high-level macros for C1
duke@435	26
duke@435	27	private:
duke@435	28	int _rsp_offset; // track rsp changes
duke@435	29	// initialization
duke@435	30	void pd_init() { _rsp_offset = 0; }
duke@435	31
duke@435	32	public:
duke@435	33	void try_allocate(
duke@435	34	Register obj, // result: pointer to object after successful allocation
duke@435	35	Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise
duke@435	36	int con_size_in_bytes, // object size in bytes if known at compile time
duke@435	37	Register t1, // temp register
duke@435	38	Register t2, // temp register
duke@435	39	Label& slow_case // continuation point if fast allocation fails
duke@435	40	);
duke@435	41
duke@435	42	void initialize_header(Register obj, Register klass, Register len, Register t1, Register t2);
duke@435	43	void initialize_body(Register obj, Register len_in_bytes, int hdr_size_in_bytes, Register t1);
duke@435	44
duke@435	45	// locking
duke@435	46	// hdr : must be rax, contents destroyed
duke@435	47	// obj : must point to the object to lock, contents preserved
duke@435	48	// disp_hdr: must point to the displaced header location, contents preserved
duke@435	49	// scratch : scratch register, contents destroyed
duke@435	50	// returns code offset at which to add null check debug information
duke@435	51	int lock_object (Register swap, Register obj, Register disp_hdr, Register scratch, Label& slow_case);
duke@435	52
duke@435	53	// unlocking
duke@435	54	// hdr : contents destroyed
duke@435	55	// obj : must point to the object to lock, contents preserved
duke@435	56	// disp_hdr: must be eax & must point to the displaced header location, contents destroyed
duke@435	57	void unlock_object(Register swap, Register obj, Register lock, Label& slow_case);
duke@435	58
duke@435	59	void initialize_object(
duke@435	60	Register obj, // result: pointer to object after successful allocation
duke@435	61	Register klass, // object klass
duke@435	62	Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise
duke@435	63	int con_size_in_bytes, // object size in bytes if known at compile time
duke@435	64	Register t1, // temp register
duke@435	65	Register t2 // temp register
duke@435	66	);
duke@435	67
duke@435	68	// allocation of fixed-size objects
duke@435	69	// (can also be used to allocate fixed-size arrays, by setting
duke@435	70	// hdr_size correctly and storing the array length afterwards)
duke@435	71	// obj : must be rax, will contain pointer to allocated object
duke@435	72	// t1, t2 : scratch registers - contents destroyed
duke@435	73	// header_size: size of object header in words
duke@435	74	// object_size: total size of object in words
duke@435	75	// slow_case : exit to slow case implementation if fast allocation fails
duke@435	76	void allocate_object(Register obj, Register t1, Register t2, int header_size, int object_size, Register klass, Label& slow_case);
duke@435	77
duke@435	78	enum {
duke@435	79	max_array_allocation_length = 0x00FFFFFF
duke@435	80	};
duke@435	81
duke@435	82	// allocation of arrays
duke@435	83	// obj : must be rax, will contain pointer to allocated object
duke@435	84	// len : array length in number of elements
duke@435	85	// t : scratch register - contents destroyed
duke@435	86	// header_size: size of object header in words
duke@435	87	// f : element scale factor
duke@435	88	// slow_case : exit to slow case implementation if fast allocation fails
duke@435	89	void allocate_array(Register obj, Register len, Register t, Register t2, int header_size, Address::ScaleFactor f, Register klass, Label& slow_case);
duke@435	90
duke@435	91	int rsp_offset() const { return _rsp_offset; }
duke@435	92	void set_rsp_offset(int n) { _rsp_offset = n; }
duke@435	93
duke@435	94	// Note: NEVER push values directly, but only through following push_xxx functions;
duke@435	95	// This helps us to track the rsp changes compared to the entry rsp (->_rsp_offset)
duke@435	96
duke@435	97	void push_jint (jint i) { _rsp_offset++; pushl(i); }
duke@435	98	void push_oop (jobject o) { _rsp_offset++; pushoop(o); }
duke@435	99	void push_addr (Address a) { _rsp_offset++; pushl(a); }
duke@435	100	void push_reg (Register r) { _rsp_offset++; pushl(r); }
duke@435	101	void pop (Register r) { _rsp_offset--; popl (r); assert(_rsp_offset >= 0, "stack offset underflow"); }
duke@435	102
duke@435	103	void dec_stack (int nof_words) {
duke@435	104	_rsp_offset -= nof_words;
duke@435	105	assert(_rsp_offset >= 0, "stack offset underflow");
duke@435	106	addl(rsp, wordSize * nof_words);
duke@435	107	}
duke@435	108
duke@435	109	void dec_stack_after_call (int nof_words) {
duke@435	110	_rsp_offset -= nof_words;
duke@435	111	assert(_rsp_offset >= 0, "stack offset underflow");
duke@435	112	}
duke@435	113
duke@435	114	void invalidate_registers(bool inv_rax, bool inv_rbx, bool inv_rcx, bool inv_rdx, bool inv_rsi, bool inv_rdi) PRODUCT_RETURN;