JP3741870B2 - 命令及びデータの先読み方法、マイクロコントローラ、疑似命令検出回路 - Google Patents

命令及びデータの先読み方法、マイクロコントローラ、疑似命令検出回路 Download PDF

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JP3741870B2
JP3741870B2 JP22381398A JP22381398A JP3741870B2 JP 3741870 B2 JP3741870 B2 JP 3741870B2 JP 22381398 A JP22381398 A JP 22381398A JP 22381398 A JP22381398 A JP 22381398A JP 3741870 B2 JP3741870 B2 JP 3741870B2
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data
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Japanese (ja)
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JP2000056970A (ja
JP2000056970A5 (enExample
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和也 谷口
順吏 宮崎
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Fujitsu Ltd
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Fujitsu Ltd
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Priority to JP22381398A priority Critical patent/JP3741870B2/ja
Priority to US09/266,869 priority patent/US6895496B1/en
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Publication of JP2000056970A5 publication Critical patent/JP2000056970A5/ja
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/30—Arrangements for executing machine instructions, e.g. instruction decode
    • G06F9/38—Concurrent instruction execution, e.g. pipeline or look ahead
    • G06F9/3802—Instruction prefetching
    • G06F9/3804—Instruction prefetching for branches, e.g. hedging, branch folding
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/30—Arrangements for executing machine instructions, e.g. instruction decode
    • G06F9/30003—Arrangements for executing specific machine instructions
    • G06F9/3005—Arrangements for executing specific machine instructions to perform operations for flow control
    • G06F9/30058—Conditional branch instructions

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  • Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Advance Control (AREA)
  • Executing Machine-Instructions (AREA)
  • Memory System Of A Hierarchy Structure (AREA)
JP22381398A 1998-08-07 1998-08-07 命令及びデータの先読み方法、マイクロコントローラ、疑似命令検出回路 Expired - Lifetime JP3741870B2 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP22381398A JP3741870B2 (ja) 1998-08-07 1998-08-07 命令及びデータの先読み方法、マイクロコントローラ、疑似命令検出回路
US09/266,869 US6895496B1 (en) 1998-08-07 1999-03-12 Microcontroller having prefetch function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22381398A JP3741870B2 (ja) 1998-08-07 1998-08-07 命令及びデータの先読み方法、マイクロコントローラ、疑似命令検出回路

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JP2000056970A JP2000056970A (ja) 2000-02-25
JP2000056970A5 JP2000056970A5 (enExample) 2005-02-17
JP3741870B2 true JP3741870B2 (ja) 2006-02-01

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JP22381398A Expired - Lifetime JP3741870B2 (ja) 1998-08-07 1998-08-07 命令及びデータの先読み方法、マイクロコントローラ、疑似命令検出回路

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US (1) US6895496B1 (enExample)
JP (1) JP3741870B2 (enExample)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005078234A (ja) * 2003-08-29 2005-03-24 Renesas Technology Corp 情報処理装置
US8578134B1 (en) * 2005-04-04 2013-11-05 Globalfoundries Inc. System and method for aligning change-of-flow instructions in an instruction buffer
KR20070094843A (ko) * 2005-04-08 2007-09-21 마쯔시다덴기산교 가부시키가이샤 프로세서
JP5233078B2 (ja) * 2006-03-23 2013-07-10 富士通セミコンダクター株式会社 プロセッサ及びその処理方法
US8856452B2 (en) 2011-05-31 2014-10-07 Illinois Institute Of Technology Timing-aware data prefetching for microprocessors
US8560778B2 (en) 2011-07-11 2013-10-15 Memory Technologies Llc Accessing data blocks with pre-fetch information
JP5863855B2 (ja) * 2014-02-26 2016-02-17 ファナック株式会社 分岐命令を高速に処理するためのインストラクションキャッシュを有するプログラマブルコントローラ
JP6252348B2 (ja) * 2014-05-14 2017-12-27 富士通株式会社 演算処理装置および演算処理装置の制御方法
US9507628B1 (en) 2015-09-28 2016-11-29 International Business Machines Corporation Memory access request for a memory protocol
EP3249541B1 (en) * 2016-05-27 2020-07-08 NXP USA, Inc. A data processor

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3573854A (en) * 1968-12-04 1971-04-06 Texas Instruments Inc Look-ahead control for operation of program loops
US3577189A (en) * 1969-01-15 1971-05-04 Ibm Apparatus and method in a digital computer for allowing improved program branching with branch anticipation reduction of the number of branches, and reduction of branch delays
US4991080A (en) * 1986-03-13 1991-02-05 International Business Machines Corporation Pipeline processing apparatus for executing instructions in three streams, including branch stream pre-execution processor for pre-executing conditional branch instructions
JP2603626B2 (ja) * 1987-01-16 1997-04-23 三菱電機株式会社 データ処理装置
JPH0646382B2 (ja) * 1987-10-05 1994-06-15 日本電気株式会社 プリフェッチキュー制御方式
JPH03191427A (ja) 1989-12-20 1991-08-21 Nec Corp マイクロプロセッサ
US5265213A (en) * 1990-12-10 1993-11-23 Intel Corporation Pipeline system for executing predicted branch target instruction in a cycle concurrently with the execution of branch instruction
JPH05274142A (ja) 1992-03-27 1993-10-22 Nec Corp 命令疑似実行装置
US5442756A (en) * 1992-07-31 1995-08-15 Intel Corporation Branch prediction and resolution apparatus for a superscalar computer processor
GB9412487D0 (en) * 1994-06-22 1994-08-10 Inmos Ltd A computer system for executing branch instructions
US5664135A (en) * 1994-09-28 1997-09-02 Hewlett-Packard Company Apparatus and method for reducing delays due to branches
US5704053A (en) * 1995-05-18 1997-12-30 Hewlett-Packard Company Efficient explicit data prefetching analysis and code generation in a low-level optimizer for inserting prefetch instructions into loops of applications
US5790823A (en) * 1995-07-13 1998-08-04 International Business Machines Corporation Operand prefetch table
GB9526129D0 (en) * 1995-12-21 1996-02-21 Philips Electronics Nv Machine code format translation
US5948095A (en) * 1997-12-31 1999-09-07 Intel Corporation Method and apparatus for prefetching data in a computer system
US6341370B1 (en) * 1998-04-24 2002-01-22 Sun Microsystems, Inc. Integration of data prefetching and modulo scheduling using postpass prefetch insertion

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JP2000056970A (ja) 2000-02-25
US6895496B1 (en) 2005-05-17

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