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====== µOP-Fusion & LSD ====== | ====== µOP-Fusion & LSD ====== | ||
The IDQ does a number of additional optimizations as it queues instructions. The Loop Stream Detector (LSD) is a mechanism inside the IDQ capable of detecting loops that fit in the IDQ and lock them down. That is, the LSD can stream the same sequence of µOPs directly from the IDQ continuously without any additional [[instruction fetch|fetching]], [[instruction decode|decoding]], or utilizing additional caches or resources. Streaming continues indefinitely until reaching a branch [[mis-prediction]]. The LSD is particularly excellent in for many common algorithms that are found in many programs (e.g., tight loops, intensive calc loops, searches, etc..). The LSD is a very primitive but efficient power saving mechanism because while the LSD is active, the rest of the front-end is effectively disabled - including both the decoders and the micro-op cache. | The IDQ does a number of additional optimizations as it queues instructions. The Loop Stream Detector (LSD) is a mechanism inside the IDQ capable of detecting loops that fit in the IDQ and lock them down. That is, the LSD can stream the same sequence of µOPs directly from the IDQ continuously without any additional [[instruction fetch|fetching]], [[instruction decode|decoding]], or utilizing additional caches or resources. Streaming continues indefinitely until reaching a branch [[mis-prediction]]. The LSD is particularly excellent in for many common algorithms that are found in many programs (e.g., tight loops, intensive calc loops, searches, etc..). The LSD is a very primitive but efficient power saving mechanism because while the LSD is active, the rest of the front-end is effectively disabled - including both the decoders and the micro-op cache. | ||
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==== Execution engine ==== | ==== Execution engine ==== |
Facts about "Sandy Bridge (client) - Microarchitectures - Intel"
codename | Sandy Bridge (client) + |
core count | 2 + and 4 + |
designer | Intel + |
first launched | September 13, 2010 + |
full page name | intel/microarchitectures/sandy bridge (client) + |
instance of | microarchitecture + |
instruction set architecture | x86-64 + |
manufacturer | Intel + |
microarchitecture type | CPU + |
name | Sandy Bridge (client) + |
phase-out | November 2012 + |
pipeline stages (max) | 19 + |
pipeline stages (min) | 14 + |
process | 32 nm (0.032 μm, 3.2e-5 mm) + |