Apparatus and Method for Bias-Free Branch Prediction
US-2015363203-A1 · Dec 17, 2015 · US
Method and apparatus for generating return address predictions for implicit and explicit subroutine calls using predecode information
US8943300B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8943300-B2 |
| Application number | US-18308608-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 31, 2008 |
| Priority date | Aug 31, 2006 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
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An apparatus for emulating the branch prediction behavior of an explicit subroutine call is disclosed. The apparatus includes a first input which is configured to receive an instruction address and a second input. The second input is configured to receive predecode information which describes the instruction address as being related to an implicit subroutine call to a subroutine. In response to the predecode information, the apparatus also includes an adder configured to add a constant to the instruction address defining a return address, causing the return address to be stored to an explicit subroutine resource, thus, facilitating subsequent branch prediction of a return call instruction.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of emulating branch prediction behavior of an explicit subroutine call, the method comprising: predecoding an instruction associated with an instruction address to define predecode information; determining whether the predecode information indicates the instruction address as a beginning of an implicit subroutine call; recognizing the instruction address as indicating the implicit subroutine call to a subroutine; calculating a return address f…
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- G06F9/3844Primary
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
- G06F9/3806Primary
Physics · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US8943300B2 cover?
- An apparatus for emulating the branch prediction behavior of an explicit subroutine call is disclosed. The apparatus includes a first input which is configured to receive an instruction address and a second input. The second input is configured to receive predecode information which describes the instruction address as being related to an implicit subroutine call to a subroutine. In response to…
- Who is the assignee on this patent?
- Stempel Brian Michael, Dieffenderfer James Norris, Sartorius Thomas Andrew, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification G06F9/3844. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jan 27 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).