BranchPredictor.py (13493:91ae6168ef27) BranchPredictor.py (13494:ed4ed5351b16)
1# Copyright (c) 2012 Mark D. Hill and David A. Wood
2# Copyright (c) 2015 The University of Wisconsin
3# All rights reserved.
4#
5# Redistribution and use in source and binary forms, with or without
6# modification, are permitted provided that the following conditions are
7# met: redistributions of source code must retain the above copyright
8# notice, this list of conditions and the following disclaimer;

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90# TAGE branch predictor as described in https://www.jilp.org/vol8/v8paper1.pdf
91# The default sizes below are for the 8C-TAGE configuration (63.5 Kbits)
92class TAGE(BranchPredictor):
93 type = 'TAGE'
94 cxx_class = 'TAGE'
95 cxx_header = "cpu/pred/tage.hh"
96
97 nHistoryTables = Param.Unsigned(7, "Number of history tables")
1# Copyright (c) 2012 Mark D. Hill and David A. Wood
2# Copyright (c) 2015 The University of Wisconsin
3# All rights reserved.
4#
5# Redistribution and use in source and binary forms, with or without
6# modification, are permitted provided that the following conditions are
7# met: redistributions of source code must retain the above copyright
8# notice, this list of conditions and the following disclaimer;

--- 81 unchanged lines hidden (view full) ---

90# TAGE branch predictor as described in https://www.jilp.org/vol8/v8paper1.pdf
91# The default sizes below are for the 8C-TAGE configuration (63.5 Kbits)
92class TAGE(BranchPredictor):
93 type = 'TAGE'
94 cxx_class = 'TAGE'
95 cxx_header = "cpu/pred/tage.hh"
96
97 nHistoryTables = Param.Unsigned(7, "Number of history tables")
98 minHist = Param.Unsigned(5, "Minimum history size of LTAGE")
99 maxHist = Param.Unsigned(130, "Maximum history size of LTAGE")
98 minHist = Param.Unsigned(5, "Minimum history size of TAGE")
99 maxHist = Param.Unsigned(130, "Maximum history size of TAGE")
100
101 tagTableTagWidths = VectorParam.Unsigned(
102 [0, 9, 9, 10, 10, 11, 11, 12], "Tag size in TAGE tag tables")
103 logTagTableSizes = VectorParam.Int(
104 [13, 9, 9, 9, 9, 9, 9, 9], "Log2 of TAGE table sizes")
105 logRatioBiModalHystEntries = Param.Unsigned(2,
106 "Log num of prediction entries for a shared hysteresis bit " \
107 "for the Bimodal")

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101 tagTableTagWidths = VectorParam.Unsigned(
102 [0, 9, 9, 10, 10, 11, 11, 12], "Tag size in TAGE tag tables")
103 logTagTableSizes = VectorParam.Int(
104 [13, 9, 9, 9, 9, 9, 9, 9], "Log2 of TAGE table sizes")
105 logRatioBiModalHystEntries = Param.Unsigned(2,
106 "Log num of prediction entries for a shared hysteresis bit " \
107 "for the Bimodal")

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