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GB2389211B - A method and apparatus for improved predicate prediction - Google Patents

A method and apparatus for improved predicate prediction

Info

Publication number
GB2389211B
GB2389211B GB0318245A GB0318245A GB2389211B GB 2389211 B GB2389211 B GB 2389211B GB 0318245 A GB0318245 A GB 0318245A GB 0318245 A GB0318245 A GB 0318245A GB 2389211 B GB2389211 B GB 2389211B
Authority
GB
United Kingdom
Prior art keywords
improved
predicate prediction
predicate
prediction
improved predicate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
GB0318245A
Other versions
GB0318245D0 (en
GB2389211A (en
Inventor
Edward T Grochowski
Hans Mulder
Vincent E Hummel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Intel Corp
Original Assignee
Intel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US09/224,414 external-priority patent/US6367004B1/en
Application filed by Intel Corp filed Critical Intel Corp
Publication of GB0318245D0 publication Critical patent/GB0318245D0/en
Publication of GB2389211A publication Critical patent/GB2389211A/en
Application granted granted Critical
Publication of GB2389211B publication Critical patent/GB2389211B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G06F9/30094—Condition code generation, e.g. Carry, Zero flag
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G06F9/30072—Arrangements for executing specific machine instructions to perform conditional operations, e.g. using predicates or guards
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G06F9/3836—Instruction issuing, e.g. dynamic instruction scheduling or out of order instruction execution
    • G06F9/3842—Speculative instruction execution
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G06F9/3836—Instruction issuing, e.g. dynamic instruction scheduling or out of order instruction execution
    • G06F9/3842—Speculative instruction execution
    • G06F9/3844—Speculative instruction execution using dynamic branch prediction, e.g. using branch history tables

Landscapes

  • Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Executing Machine-Instructions (AREA)
GB0318245A 1998-12-31 1999-12-23 A method and apparatus for improved predicate prediction Expired - Fee Related GB2389211B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/224,414 US6367004B1 (en) 1998-12-31 1998-12-31 Method and apparatus for predicting a predicate based on historical information and the least significant bits of operands to be compared
GB0114437A GB2360111B (en) 1998-12-31 1999-12-23 A method and apparatus for improved predicate prediction

Publications (3)

Publication Number Publication Date
GB0318245D0 GB0318245D0 (en) 2003-09-10
GB2389211A GB2389211A (en) 2003-12-03
GB2389211B true GB2389211B (en) 2004-02-04

Family

ID=29404275

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0318245A Expired - Fee Related GB2389211B (en) 1998-12-31 1999-12-23 A method and apparatus for improved predicate prediction

Country Status (1)

Country Link
GB (1) GB2389211B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9122486B2 (en) 2010-11-08 2015-09-01 Qualcomm Incorporated Bimodal branch predictor encoded in a branch instruction
US20130283023A1 (en) * 2012-04-18 2013-10-24 Qualcomm Incorporated Bimodal Compare Predictor Encoded In Each Compare Instruction
US10620961B2 (en) 2018-03-30 2020-04-14 Intel Corporation Apparatus and method for speculative conditional move operation

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5590362A (en) * 1990-03-27 1996-12-31 International Business Machines Corporation Database engine predicate evaluator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5590362A (en) * 1990-03-27 1996-12-31 International Business Machines Corporation Database engine predicate evaluator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEEE Computer, Vol 31, No 1, January 1998, Wen-Mei Hwu, "Introduction to predicated execution", pages 49-50 *

Also Published As

Publication number Publication date
GB0318245D0 (en) 2003-09-10
GB2389211A (en) 2003-12-03

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20121223