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Parameters.cpp

Last change on this file was 146, checked in by rosiere, 13 years ago
1) Integration of RegisterFile_Internal_Banked in RegisterFile? 2) Erase "read_write" interface in RegisterFile_Monolithic component 3) Add smith predictor parameters in Load_store_pointer_unit. 4) Fix not statistics flags
Property svn:keywords set to `Id`
File size: 7.5 KB

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1	/*
2	* $Id: Parameters.cpp 146 2011-02-01 20:57:54Z rosiere $
3	*
4	* [ Description ]
5	*
6	*/
7
8	#include "Behavioural/Core/Multi_Front_end/Front_end/Prediction_unit/Direction/Meta_Predictor/Two_Level_Branch_Predictor/include/Parameters.h"
9	#include "Common/include/BitManipulation.h"
10
11	namespace morpheo {
12	namespace behavioural {
13	namespace core {
14	namespace multi_front_end {
15	namespace front_end {
16	namespace prediction_unit {
17	namespace direction {
18	namespace meta_predictor {
19	namespace two_level_branch_predictor {
20
21
22	#undef FUNCTION
23	#define FUNCTION "Two_Level_Branch_Predictor::Parameters"
24	Parameters::Parameters (uint32_t nb_inst_predict ,
25	uint32_t nb_inst_update ,
26	uint32_t size_address ,
27	bool have_bht ,
28	uint32_t bht_size_shifter ,
29	uint32_t bht_nb_shifter ,
30	bool have_pht ,
31	uint32_t pht_size_counter ,
32	uint32_t pht_nb_counter ,
33	uint32_t pht_size_address_share,
34	Tpht_scheme_t pht_scheme ,
35	bool update_on_prediction ,
36	bool is_toplevel)
37	{
38	log_begin(Two_Level_Branch_Predictor,FUNCTION);
39
40	_nb_inst_predict = nb_inst_predict ;
41	_nb_inst_update = nb_inst_update ;
42	_size_address = size_address ;
43	_have_bht = have_bht ;
44	_bht_size_shifter = (have_bht)?(bht_size_shifter):0;
45	_bht_nb_shifter = (have_bht)?(bht_nb_shifter ):0;
46	_have_pht = have_pht ;
47	_pht_size_counter = (have_pht)?(pht_size_counter):0;
48	_pht_nb_counter = (have_pht)?(pht_nb_counter ):0;
49	_pht_size_address_share = (have_bht and have_pht)?(pht_size_address_share):0;
50	_pht_scheme = pht_scheme ;
51	_update_on_prediction = update_on_prediction ;
52
53	_bht_size_address = (_have_bht)?log2(_bht_nb_shifter):0;
54	_pht_size_address = (_have_pht)?log2(_pht_nb_counter):0;
55
56	test();
57
58	// history to update_prediction_table :
59	// MSB : pht_history
60	// LSB : bht_history
61	log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _have_bht : %d",_have_bht );
62	log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _bht_size_shifter : %d",_bht_size_shifter);
63	log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _bht_nb_shifter : %d",_bht_nb_shifter );
64
65	log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _have_pht : %d",_have_pht );
66	log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_size_counter : %d",_pht_size_counter);
67	log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_nb_counter : %d",_pht_nb_counter );
68
69	_size_history = _bht_size_shifter + _pht_size_counter;
70	_bht_history_mask = gen_mask<Thistory_t>(_bht_size_shifter);
71	_bht_history_shift = 0;
72	_pht_history_mask = gen_mask<Thistory_t>(_pht_size_counter);
73	_pht_history_shift = _bht_size_shifter;
74
75	log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _size_history : %d",_size_history );
76	log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _bht_history_mask : 0x%llx",_bht_history_mask );
77	log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _bht_history_shift : %lld",_bht_history_shift );
78	log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_history_mask : 0x%llx",_pht_history_mask );
79	log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_history_shift : %lld",_pht_history_shift );
80
81	_bht_init_take = static_cast<Thistory_t>(-1)&_bht_history_mask;
82	_bht_init_ntake = 0;
83	_pht_init_take = (1<<(_pht_size_counter-1)); // size = 4 : 1000/2
84	_pht_init_ntake = _pht_init_take-1; // size = 4 : 0111/2
85
86	log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _bht_init_take : 0x%llx",_bht_init_take );
87	log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _bht_init_ntake : 0x%llx",_bht_init_ntake);
88	log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_init_take : 0x%llx",_pht_init_take );
89	log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_init_ntake : 0x%llx",_pht_init_ntake);
90
91	if (_have_bht)
92	{
93	_bht_address_mask = gen_mask<Taddress_t>(_bht_size_address);
94
95	log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _bht_address_mask : 0x%x",_bht_address_mask );
96	}
97
98	if (_have_pht)
99	{
100	_pht_counter_max = (1<<_pht_size_counter)-1;
101	_pht_threshold_up = (1<<(_pht_size_counter-1))+1;
102	_pht_threshold_down = (1<<(_pht_size_counter-1))-1;
103
104	_pht_size_bank = (_have_bht)?(1<<_bht_size_shifter):1;
105	_pht_nb_bank = _pht_nb_counter / _pht_size_bank;
106
107	// -------->\|
108	// +---+ \|
109	// \| \| \|--->
110	// ---> --->\|
111	// \| \| \|
112	// +---+
113	//
114
115	_pht_address_share_mask = gen_mask<Taddress_t>(_pht_size_address_share);
116	_pht_address_share_shift = _bht_size_shifter-_pht_size_address_share;
117	_pht_address_bank_mask = gen_mask<Taddress_t>(log2(_pht_nb_bank));
118	_pht_address_bank_shift = _pht_size_address_share;
119
120	log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_nb_bank : %d" ,_pht_nb_bank );
121	log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_size_bank : %d" ,_pht_size_bank );
122	log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_address_share_mask : 0x%x",_pht_address_share_mask );
123	log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_address_share_shift : %d" ,_pht_address_share_shift );
124	log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_address_bank_mask : 0x%x",_pht_address_bank_mask );
125	log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_address_bank_shift : %d" ,_pht_address_bank_shift );
126	}
127
128	if (is_toplevel)
129	copy();
130
131	log_end(Two_Level_Branch_Predictor,FUNCTION);
132	};
133
134	// #undef FUNCTION
135	// #define FUNCTION "Two_Level_Branch_Predictor::Parameters (copy)"
136	// Parameters::Parameters (Parameters & param)
137	// {
138	// log_begin(Two_Level_Branch_Predictor,FUNCTION);
139	// test();
140	// log_end(Two_Level_Branch_Predictor,FUNCTION);
141	// };
142
143	#undef FUNCTION
144	#define FUNCTION "Two_Level_Branch_Predictor::~Parameters"
145	Parameters::~Parameters (void)
146	{
147	log_begin(Two_Level_Branch_Predictor,FUNCTION);
148	log_end(Two_Level_Branch_Predictor,FUNCTION);
149	};
150
151	#undef FUNCTION
152	#define FUNCTION "Two_Level_Branch_Predictor::copy"
153	void Parameters::copy (void)
154	{
155	log_begin(Two_Level_Branch_Predictor,FUNCTION);
156	log_end(Two_Level_Branch_Predictor,FUNCTION);
157	};
158
159	}; // end namespace two_level_branch_predictor
160	}; // end namespace meta_predictor
161	}; // end namespace direction
162	}; // end namespace prediction_unit
163	}; // end namespace front_end
164	}; // end namespace multi_front_end
165	}; // end namespace core
166
167	}; // end namespace behavioural
168	}; // end namespace morpheo

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source: trunk/IPs/systemC/processor/Morpheo/Behavioural/Core/Multi_Front_end/Front_end/Prediction_unit/Direction/Meta_Predictor/Two_Level_Branch_Predictor/src/Parameters.cpp

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