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source: trunk/IPs/systemC/processor/Morpheo/Behavioural/Core/Multi_Front_end/Front_end/Prediction_unit/Update_Prediction_Table/include/Types.h @ 95

Last change on this file since 95 was 95, checked in by rosiere, 15 years ago
1) Update Prediction Table - New architecture (systemC) done (and tested) -> need change interface in top level 2) Change documentation on VHDL generation 3) Change VHDL constant (case std_logic and std_logic_vector)
Property svn:keywords set to `Id`
File size: 8.7 KB

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1	#ifndef morpheo_behavioural_core_multi_front_end_front_end_prediction_unit_update_prediction_table_Types_h
2	#define morpheo_behavioural_core_multi_front_end_front_end_prediction_unit_update_prediction_table_Types_h
3
4	/*
5	* $Id: Types.h 95 2008-12-16 16:24:26Z rosiere $
6	*
7	* [ Description ]
8	*
9	*/
10
11	#include "Behavioural/include/Types.h"
12
13	namespace morpheo {
14	namespace behavioural {
15	namespace core {
16	namespace multi_front_end {
17	namespace front_end {
18	namespace prediction_unit {
19	namespace update_prediction_table {
20
21	typedef enum
22	{
23	EVENT_STATE_OK , // Can predict
24	EVENT_STATE_FLUSH_UFPT , // in decod stage, detect a miss, continue to execute but flush ufpt
25	EVENT_STATE_FLUSH_UFPT_AND_UPT , // in commit stage, detect a miss, stop context and flush ufpt and upt
26	EVENT_STATE_FLUSH_UPT , // in commit stage, detect a miss, context is stop and ufpt is flush, update RAS
27	EVENT_STATE_UPDATE_CONTEXT , // prediction unit is update, send signal to context manager
28	EVENT_STATE_WAIT_END_EVENT // prediction unit is ok, wait the end of envent (send by Context State)
29	} event_state_t;
30
31	typedef enum
32	{
33	UPDATE_FETCH_PREDICTION_STATE_EMPTY , // Slot is empty
34	UPDATE_FETCH_PREDICTION_STATE_WAIT_DECOD , // Have make a prediction, wait decod
35	UPDATE_FETCH_PREDICTION_STATE_EVENT , // previous branch is a miss prediction
36	UPDATE_FETCH_PREDICTION_STATE_END // branch is updated
37	} ufpt_state_t;
38
39	typedef enum
40	{
41	UPDATE_PREDICTION_STATE_EMPTY , // Slot is empty
42	UPDATE_PREDICTION_STATE_WAIT_END , // Have make a prediction, wait branch_complete
43	UPDATE_PREDICTION_STATE_OK , // this branch is a hit prediction
44	UPDATE_PREDICTION_STATE_KO , // this branch is a miss prediction
45	UPDATE_PREDICTION_STATE_EVENT , // previous branch is a miss prediction
46	UPDATE_PREDICTION_STATE_END_OK , // branch is updated, update pointer
47	UPDATE_PREDICTION_STATE_END_KO // branch is updated, don't update pointer
48	} upt_state_t;
49
50	class ufpt_entry_t
51	{
52	public : ufpt_state_t _state ;
53	public : Tbranch_condition_t _condition ;
54	public : Taddress_t _address_src ;
55	public : Taddress_t _address_dest ;
56	public : Tcontrol_t _last_take ;
57	//public : Tcontrol_t _good_take ;
58	public : Tcontrol_t _is_accurate ;
59	public : Thistory_t _history ;
60	public : Taddress_t _address_ras ;
61	public : Tptr_t _index_ras ;
62	//public : Tcontrol_t _ifetch_prediction;
63	};
64
65	class upt_entry_t
66	{
67	public : upt_state_t _state ;
68	public : Tbranch_condition_t _condition ;
69	public : Taddress_t _address_src ;
70	public : Taddress_t _address_dest ;
71	public : Tcontrol_t _last_take ;
72	public : Tcontrol_t _good_take ; // not in ufpt
73	public : Tcontrol_t _is_accurate ;
74	public : Thistory_t _history ;
75	public : Taddress_t _address_ras ;
76	public : Tptr_t _index_ras ;
77	public : Tcontrol_t _ifetch_prediction; // not in ufpt
78	};
79
80
81	// BRANCH_CONDITION_NONE_WITHOUT_WRITE_STACK
82	// BRANCH_CONDITION_NONE_WITH_WRITE_STACK
83	// BRANCH_CONDITION_FLAG_UNSET
84	// BRANCH_CONDITION_FLAG_SET
85	// BRANCH_CONDITION_READ_REGISTER_WITHOUT_WRITE_STACK
86	// BRANCH_CONDITION_READ_REGISTER_WITH_WRITE_STACK
87	// BRANCH_CONDITION_READ_STACK
88
89
90	#define update_btb(cond) true
91
92	#define update_dir(cond) ((cond == BRANCH_CONDITION_FLAG_UNSET) or \
93	(cond == BRANCH_CONDITION_FLAG_SET))
94
95	#define update_ras(cond) ((cond == BRANCH_CONDITION_NONE_WITH_WRITE_STACK ) or \
96	(cond == BRANCH_CONDITION_READ_REGISTER_WITH_WRITE_STACK) or \
97	(cond == BRANCH_CONDITION_READ_STACK ))
98
99	#define push_ras(cond) ((cond == BRANCH_CONDITION_NONE_WITH_WRITE_STACK ) or \
100	(cond == BRANCH_CONDITION_READ_REGISTER_WITH_WRITE_STACK))
101
102	#define pop_ras(cond) ((cond == BRANCH_CONDITION_READ_STACK ))
103
104	#define need_update(cond) update_ras(cond)
105
106	}; // end namespace update_prediction_table
107	}; // end namespace prediction_unit
108	}; // end namespace front_end
109	}; // end namespace multi_front_end
110	}; // end namespace core
111	}; // end namespace behavioural
112
113	template<> inline std::string toString<morpheo::behavioural::core::multi_front_end::front_end::prediction_unit::update_prediction_table::event_state_t>(const morpheo::behavioural::core::multi_front_end::front_end::prediction_unit::update_prediction_table::event_state_t& x)
114	{
115	switch (x)
116	{
117	case morpheo::behavioural::core::multi_front_end::front_end::prediction_unit::update_prediction_table::EVENT_STATE_OK : return "ok" ; break;
118	case morpheo::behavioural::core::multi_front_end::front_end::prediction_unit::update_prediction_table::EVENT_STATE_FLUSH_UFPT : return "flush_ufpt" ; break;
119	case morpheo::behavioural::core::multi_front_end::front_end::prediction_unit::update_prediction_table::EVENT_STATE_FLUSH_UFPT_AND_UPT : return "flush_ufpt_and_upt" ; break;
120	case morpheo::behavioural::core::multi_front_end::front_end::prediction_unit::update_prediction_table::EVENT_STATE_FLUSH_UPT : return "flush_upt" ; break;
121	case morpheo::behavioural::core::multi_front_end::front_end::prediction_unit::update_prediction_table::EVENT_STATE_UPDATE_CONTEXT : return "update_context" ; break;
122	case morpheo::behavioural::core::multi_front_end::front_end::prediction_unit::update_prediction_table::EVENT_STATE_WAIT_END_EVENT : return "wait_and_event" ; break;
123	default : return "" ; break;
124	}
125	};
126
127	template<> inline std::string toString<morpheo::behavioural::core::multi_front_end::front_end::prediction_unit::update_prediction_table::ufpt_state_t>(const morpheo::behavioural::core::multi_front_end::front_end::prediction_unit::update_prediction_table::ufpt_state_t& x)
128	{
129	switch (x)
130	{
131	case morpheo::behavioural::core::multi_front_end::front_end::prediction_unit::update_prediction_table::UPDATE_FETCH_PREDICTION_STATE_EMPTY : return "empty" ; break;
132	case morpheo::behavioural::core::multi_front_end::front_end::prediction_unit::update_prediction_table::UPDATE_FETCH_PREDICTION_STATE_WAIT_DECOD : return "wait_decod"; break;
133	case morpheo::behavioural::core::multi_front_end::front_end::prediction_unit::update_prediction_table::UPDATE_FETCH_PREDICTION_STATE_EVENT : return "event" ; break;
134	case morpheo::behavioural::core::multi_front_end::front_end::prediction_unit::update_prediction_table::UPDATE_FETCH_PREDICTION_STATE_END : return "end" ; break;
135	default : return "" ; break;
136	}
137	};
138
139	template<> inline std::string toString<morpheo::behavioural::core::multi_front_end::front_end::prediction_unit::update_prediction_table::upt_state_t>(const morpheo::behavioural::core::multi_front_end::front_end::prediction_unit::update_prediction_table::upt_state_t& x)
140	{
141	switch (x)
142	{
143	case morpheo::behavioural::core::multi_front_end::front_end::prediction_unit::update_prediction_table::UPDATE_PREDICTION_STATE_EMPTY : return "empty" ; break;
144	case morpheo::behavioural::core::multi_front_end::front_end::prediction_unit::update_prediction_table::UPDATE_PREDICTION_STATE_WAIT_END : return "wait_end" ; break;
145	case morpheo::behavioural::core::multi_front_end::front_end::prediction_unit::update_prediction_table::UPDATE_PREDICTION_STATE_OK : return "ok" ; break;
146	case morpheo::behavioural::core::multi_front_end::front_end::prediction_unit::update_prediction_table::UPDATE_PREDICTION_STATE_KO : return "ko" ; break;
147	case morpheo::behavioural::core::multi_front_end::front_end::prediction_unit::update_prediction_table::UPDATE_PREDICTION_STATE_EVENT : return "event" ; break;
148	case morpheo::behavioural::core::multi_front_end::front_end::prediction_unit::update_prediction_table::UPDATE_PREDICTION_STATE_END_OK : return "end_ok" ; break;
149	case morpheo::behavioural::core::multi_front_end::front_end::prediction_unit::update_prediction_table::UPDATE_PREDICTION_STATE_END_KO : return "end_ko" ; break;
150	default : return "" ; break;
151	}
152	};
153
154	}; // end namespace morpheo
155
156	#endif

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