• file
• revisions
• annotate
• diff
• comparison
• raw

src/cpu/sparc/vm/registerMap_sparc.hpp@660978a2a31a (annotated)

src/cpu/sparc/vm/registerMap_sparc.hpp

Thu, 12 Mar 2009 10:37:46 -0700

author

kvn

date

Thu, 12 Mar 2009 10:37:46 -0700

changeset 1077

660978a2a31a

parent 435

a61af66fc99e

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6791178: Specialize for zero as the compressed oop vm heap base
Summary: Use zero based compressed oops if java heap is below 32gb and unscaled compressed oops if java heap is below 4gb.
Reviewed-by: never, twisti, jcoomes, coleenp

duke@435	1	/*
duke@435	2	* Copyright 1998-2007 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	// machine-dependent implemention for register maps
duke@435	26	friend class frame;
duke@435	27
duke@435	28	private:
duke@435	29	intptr_t* _window; // register window save area (for L and I regs)
duke@435	30	intptr_t* _younger_window; // previous save area (for O regs, if needed)
duke@435	31
duke@435	32	address pd_location(VMReg reg) const;
duke@435	33	void pd_clear();
duke@435	34	void pd_initialize_from(const RegisterMap* map) {
duke@435	35	_window = map->_window;
duke@435	36	_younger_window = map->_younger_window;
duke@435	37	_location_valid[0] = 0; // avoid the shift_individual_registers game
duke@435	38	}
duke@435	39	void pd_initialize() {
duke@435	40	_window = NULL;
duke@435	41	_younger_window = NULL;
duke@435	42	_location_valid[0] = 0; // avoid the shift_individual_registers game
duke@435	43	}
duke@435	44	void shift_window(intptr_t* sp, intptr_t* younger_sp) {
duke@435	45	_window = sp;
duke@435	46	_younger_window = younger_sp;
duke@435	47	// Throw away locations for %i, %o, and %l registers:
duke@435	48	// But do not throw away %g register locs.
duke@435	49	if (_location_valid[0] != 0) shift_individual_registers();
duke@435	50	}
duke@435	51	void shift_individual_registers();
duke@435	52	// When popping out of compiled frames, we make all IRegs disappear.
duke@435	53	void make_integer_regs_unsaved() { _location_valid[0] = 0; }