Qualcomm Incorporated

Pritha Ghoshal

Thomas Philip Speier

Brian Stempel

Niket Choudhary

Patrick Eibl

James Norris Dieffenderfer

Rodney Wayne Smith

Michael W Morrow

David Scott Ray

Manish Garg

Yusuf Cagatay Tekmen

Luke Yen

William James McAvoy

Ravi Rajagopalan

Harsh Thakker

Kevin Jaget

Sang Hoon Lee

Various aspects disclosed herein relate to combining instructions to load data from or store data in memory while processing instructions in a computer processor. More particularly, at least one pattern of multiple memory access instructions that reference a common base register and do not fully utilize an available bus width may be identified in a processor pipeline. In response to determining that the multiple memory access instructions target adjacent memory or non-contiguous memory that can fit on a single cache line, the multiple memory access instructions may be replaced within the processor pipeline with one equivalent memory access instruction that utilizes more of the available bus width than either of the replaced memory access instructions.

Combining load or store instructions

A method, apparatus, and system for reducing pipeline stalls due to address translation misses is presented. An apparatus comprises a memory access instruction pipeline, a translation lookaside buffer coupled to the memory access instruction pipeline, and a TLB miss queue coupled to both the TLB and the memory access instruction pipeline. The TLB miss queue is configured to selectively store a first memory access instruction that has been removed from the memory access instruction pipeline as a result of the first memory access instruction missing in the TLB along with information associated with the first memory access instruction. The TLB miss queue is further configured to reintroduce the first memory access instruction to the memory access instruction pipeline associated with a return of an address translation related to the first memory access instruction.

Method, apparatus, and system for reducing pipeline stalls due to address translation misses

A method, apparatus, and system for prefetching exclusive cache coherence state for store instructions is disclosed. An apparatus may comprise a cache and a gather buffer coupled to the cache. The gather buffer may be configured to store a plurality of cache lines, each cache line of the plurality of cache lines associated with a store instruction. The gather buffer may be further configured to determine whether a first cache line associated with a first store instruction should be allocated in the cache. If the first cache line associated with the first store instruction is to be allocated in the cache, the gather buffer is configured to issue a pre-write request to acquire exclusive cache coherency state to the first cache line associated with the first store instruction.

Method, apparatus, and system for prefetching exclusive cache coherence state for store instructions

Growing community of inventors

Raleigh, NC, United States of America

Pritha Ghoshal