Invention Grant
- Patent Title: IT instruction pre-decode
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Application No.: US13774093Application Date: 2013-02-22
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Publication No.: US09626185B2Publication Date: 2017-04-18
- Inventor: Shyam Sundar , Ian D. Kountanis , Conrado Blasco-Allue , Gerard R. Williams, III , Wei-Han Lien , Ramesh B. Gunna
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Meyertons, Hood, Kivlin, Kowert & Goetzel, P.C.
- Agent Rory D. Rankin
- Main IPC: G06F15/00
- IPC: G06F15/00 ; G06F9/30 ; G06F9/40 ; G06F9/38

Abstract:
Various techniques for processing and pre-decoding branches within an IT instruction block. Instructions are fetched and cached in an instruction cache, and pre-decode bits are generated to indicate the presence of an IT instruction and the likely boundaries of the IT instruction block. If an unconditional branch is detected within the likely boundaries of an IT instruction block, the unconditional branch is treated as if it were a conditional branch. The unconditional branch is sent to the branch direction predictor and the predictor generates a branch direction prediction for the unconditional branch.
Public/Granted literature
- US20140244976A1 IT INSTRUCTION PRE-DECODE Public/Granted day:2014-08-28
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