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src/cpu/x86/vm/stubRoutines_x86_64.hpp@18a08a7e16b5 (annotated)

src/cpu/x86/vm/stubRoutines_x86_64.hpp

Fri, 26 Jun 2009 07:26:10 -0700

author

twisti

date

Fri, 26 Jun 2009 07:26:10 -0700

changeset 1259

18a08a7e16b5

parent 772

9ee9cf798b59

child 1734

9eba43136cb5

permissions

-rw-r--r--

5057225: Remove useless I2L conversions
Summary: The optimizer should be told to normalize (AndL (ConvI2L x) 0xFF) to (ConvI2L (AndI x 0xFF)), and then the existing matcher rule will work for free.
Reviewed-by: kvn

duke@435	1	/*
xdono@772	2	* Copyright 2003-2008 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	// This file holds the platform specific parts of the StubRoutines
duke@435	26	// definition. See stubRoutines.hpp for a description on how to
duke@435	27	// extend it.
duke@435	28
duke@435	29	static bool returns_to_call_stub(address return_pc) { return return_pc == _call_stub_return_address; }
duke@435	30
duke@435	31	enum platform_dependent_constants
duke@435	32	{
never@739	33	code_size1 = 19000, // simply increase if too small (assembler will
duke@435	34	// crash if too small)
duke@435	35	code_size2 = 22000 // simply increase if too small (assembler will
duke@435	36	// crash if too small)
duke@435	37	};
duke@435	38
never@739	39	class x86 {
duke@435	40	friend class StubGenerator;
duke@435	41
duke@435	42	private:
duke@435	43	static address _get_previous_fp_entry;
duke@435	44	static address _verify_mxcsr_entry;
duke@435	45
duke@435	46	static address _f2i_fixup;
duke@435	47	static address _f2l_fixup;
duke@435	48	static address _d2i_fixup;
duke@435	49	static address _d2l_fixup;
duke@435	50
duke@435	51	static address _float_sign_mask;
duke@435	52	static address _float_sign_flip;
duke@435	53	static address _double_sign_mask;
duke@435	54	static address _double_sign_flip;
duke@435	55	static address _mxcsr_std;
duke@435	56
duke@435	57	public:
duke@435	58
duke@435	59	static address get_previous_fp_entry()
duke@435	60	{
duke@435	61	return _get_previous_fp_entry;
duke@435	62	}
duke@435	63
duke@435	64	static address verify_mxcsr_entry()
duke@435	65	{
duke@435	66	return _verify_mxcsr_entry;
duke@435	67	}
duke@435	68
duke@435	69	static address f2i_fixup()
duke@435	70	{
duke@435	71	return _f2i_fixup;
duke@435	72	}
duke@435	73
duke@435	74	static address f2l_fixup()
duke@435	75	{
duke@435	76	return _f2l_fixup;
duke@435	77	}
duke@435	78
duke@435	79	static address d2i_fixup()
duke@435	80	{
duke@435	81	return _d2i_fixup;
duke@435	82	}
duke@435	83
duke@435	84	static address d2l_fixup()
duke@435	85	{
duke@435	86	return _d2l_fixup;
duke@435	87	}
duke@435	88
duke@435	89	static address float_sign_mask()
duke@435	90	{
duke@435	91	return _float_sign_mask;
duke@435	92	}
duke@435	93
duke@435	94	static address float_sign_flip()
duke@435	95	{
duke@435	96	return _float_sign_flip;
duke@435	97	}
duke@435	98
duke@435	99	static address double_sign_mask()
duke@435	100	{
duke@435	101	return _double_sign_mask;
duke@435	102	}
duke@435	103
duke@435	104	static address double_sign_flip()
duke@435	105	{
duke@435	106	return _double_sign_flip;
duke@435	107	}
duke@435	108
duke@435	109	static address mxcsr_std()
duke@435	110	{
duke@435	111	return _mxcsr_std;
duke@435	112	}
duke@435	113	};