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src/cpu/sparc/vm/vm_version_sparc.hpp@126ea7725993 (annotated)

src/cpu/sparc/vm/vm_version_sparc.hpp

Tue, 03 Aug 2010 08:13:38 -0400

author

bobv

date

Tue, 03 Aug 2010 08:13:38 -0400

changeset 2036

126ea7725993

parent 1907

c18cbe5936b8

child 2269

ae065c367d93

permissions

-rw-r--r--

6953477: Increase portability and flexibility of building Hotspot
Summary: A collection of portability improvements including shared code support for PPC, ARM platforms, software floating point, cross compilation support and improvements in error crash detail.
Reviewed-by: phh, never, coleenp, dholmes

duke@435	1	/*
trims@1907	2	* Copyright (c) 1997, 2009, Oracle and/or its affiliates. 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	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	class VM_Version: public Abstract_VM_Version {
duke@435	26	protected:
duke@435	27	enum Feature_Flag {
twisti@1076	28	v8_instructions = 0,
twisti@1076	29	hardware_mul32 = 1,
twisti@1076	30	hardware_div32 = 2,
twisti@1076	31	hardware_fsmuld = 3,
twisti@1078	32	hardware_popc = 4,
twisti@1078	33	v9_instructions = 5,
twisti@1078	34	vis1_instructions = 6,
twisti@1078	35	vis2_instructions = 7,
twisti@1078	36	sun4v_instructions = 8
duke@435	37	};
duke@435	38
duke@435	39	enum Feature_Flag_Set {
twisti@1076	40	unknown_m = 0,
twisti@1076	41	all_features_m = -1,
duke@435	42
twisti@1076	43	v8_instructions_m = 1 << v8_instructions,
twisti@1076	44	hardware_mul32_m = 1 << hardware_mul32,
twisti@1076	45	hardware_div32_m = 1 << hardware_div32,
twisti@1076	46	hardware_fsmuld_m = 1 << hardware_fsmuld,
twisti@1078	47	hardware_popc_m = 1 << hardware_popc,
twisti@1076	48	v9_instructions_m = 1 << v9_instructions,
twisti@1076	49	vis1_instructions_m = 1 << vis1_instructions,
twisti@1076	50	vis2_instructions_m = 1 << vis2_instructions,
twisti@1076	51	sun4v_m = 1 << sun4v_instructions,
duke@435	52
twisti@1076	53	generic_v8_m = v8_instructions_m | hardware_mul32_m | hardware_div32_m | hardware_fsmuld_m,
twisti@1076	54	generic_v9_m = generic_v8_m | v9_instructions_m,
twisti@1076	55	ultra3_m = generic_v9_m | vis1_instructions_m | vis2_instructions_m,
duke@435	56
duke@435	57	// Temporary until we have something more accurate
twisti@1076	58	niagara1_unique_m = sun4v_m,
twisti@1076	59	niagara1_m = generic_v9_m | niagara1_unique_m
duke@435	60	};
duke@435	61
duke@435	62	static int _features;
duke@435	63	static const char* _features_str;
duke@435	64
duke@435	65	static void print_features();
duke@435	66	static int determine_features();
duke@435	67	static int platform_features(int features);
duke@435	68
twisti@1076	69	static bool is_niagara1(int features) { return (features & sun4v_m) != 0; }
duke@435	70
jmasa@445	71	static int maximum_niagara1_processor_count() { return 32; }
jmasa@445	72	// Returns true if the platform is in the niagara line and
jmasa@445	73	// newer than the niagara1.
jmasa@445	74	static bool is_niagara1_plus();
jmasa@445	75
duke@435	76	public:
duke@435	77	// Initialization
duke@435	78	static void initialize();
duke@435	79
duke@435	80	// Instruction support
duke@435	81	static bool has_v8() { return (_features & v8_instructions_m) != 0; }
duke@435	82	static bool has_v9() { return (_features & v9_instructions_m) != 0; }
twisti@1076	83	static bool has_hardware_mul32() { return (_features & hardware_mul32_m) != 0; }
twisti@1076	84	static bool has_hardware_div32() { return (_features & hardware_div32_m) != 0; }
duke@435	85	static bool has_hardware_fsmuld() { return (_features & hardware_fsmuld_m) != 0; }
twisti@1078	86	static bool has_hardware_popc() { return (_features & hardware_popc_m) != 0; }
duke@435	87	static bool has_vis1() { return (_features & vis1_instructions_m) != 0; }
duke@435	88	static bool has_vis2() { return (_features & vis2_instructions_m) != 0; }
duke@435	89
duke@435	90	static bool supports_compare_and_exchange()
duke@435	91	{ return has_v9(); }
duke@435	92
duke@435	93	static bool is_ultra3() { return (_features & ultra3_m) == ultra3_m; }
duke@435	94	static bool is_sun4v() { return (_features & sun4v_m) != 0; }
duke@435	95	static bool is_niagara1() { return is_niagara1(_features); }
duke@435	96
duke@435	97	static bool has_fast_fxtof() { return has_v9() && !is_ultra3(); }
duke@435	98
duke@435	99	static const char* cpu_features() { return _features_str; }
duke@435	100
duke@435	101	static intx L1_data_cache_line_size() {
duke@435	102	return 64; // default prefetch block size on sparc
duke@435	103	}
duke@435	104
duke@435	105	// Prefetch
duke@435	106	static intx prefetch_copy_interval_in_bytes() {
duke@435	107	intx interval = PrefetchCopyIntervalInBytes;
duke@435	108	return interval >= 0 ? interval : (has_v9() ? 512 : 0);
duke@435	109	}
duke@435	110	static intx prefetch_scan_interval_in_bytes() {
duke@435	111	intx interval = PrefetchScanIntervalInBytes;
duke@435	112	return interval >= 0 ? interval : (has_v9() ? 512 : 0);
duke@435	113	}
duke@435	114	static intx prefetch_fields_ahead() {
duke@435	115	intx count = PrefetchFieldsAhead;
duke@435	116	return count >= 0 ? count : (is_ultra3() ? 1 : 0);
duke@435	117	}
duke@435	118
duke@435	119	static intx allocate_prefetch_distance() {
duke@435	120	// This method should be called before allocate_prefetch_style().
duke@435	121	intx count = AllocatePrefetchDistance;
duke@435	122	if (count < 0) { // default is not defined ?
duke@435	123	count = 512;
duke@435	124	}
duke@435	125	return count;
duke@435	126	}
duke@435	127	static intx allocate_prefetch_style() {
duke@435	128	assert(AllocatePrefetchStyle >= 0, "AllocatePrefetchStyle should be positive");
duke@435	129	// Return 0 if AllocatePrefetchDistance was not defined.
duke@435	130	return AllocatePrefetchDistance > 0 ? AllocatePrefetchStyle : 0;
duke@435	131	}
duke@435	132
duke@435	133	// Legacy
duke@435	134	static bool v8_instructions_work() { return has_v8() && !has_v9(); }
duke@435	135	static bool v9_instructions_work() { return has_v9(); }
duke@435	136
duke@435	137	// Assembler testing
duke@435	138	static void allow_all();
duke@435	139	static void revert();
duke@435	140
duke@435	141	// Override the Abstract_VM_Version implementation.
duke@435	142	static uint page_size_count() { return is_sun4v() ? 4 : 2; }
jmasa@445	143
jmasa@445	144	// Calculates the number of parallel threads
jmasa@445	145	static unsigned int calc_parallel_worker_threads();
duke@435	146	};