取指单元(Instruction Fetch Unit)负责向处理器输送需要执行的指令,主要由 Instruction Cache 和 计算下一个指令地址的单元组成。由于当下的高速处理器每一个周期会至少消耗一条指令,因此对于取值单元来说,下一条指令地址的计算必须和 ICache 的访问并行执行。 对于正常执行的指令来说,只是继续向下取指即可;但对于分支...
In this case a fetch access is reissued on the slow path that goes through the large main TLB.doi:US5423014 AGlenn J. HintonRobert M. Riches Jr.USUS5423014 Feb 24, 1994 Jun 6, 1995 Intel Corporation Instruction fetch unit with early instruction fetch mechanism...
The instruction fetch unit (IFU) contains the instruction cache controller and its associated linefill buffer. The Cortex-A53 MPCore instruction cache is 2-way set associative and uses virtually-indexed physically-tagged (VIPT) cache lines holding up to
A method in an instruction fetch unit configured to initiate a fetch of an instruction bundle from a first memory and to initiate a fetch of an instruction bundle from a second memory, wherein a fetch from the second memory takes a predetermined fixed plurality of processor cycles, the method...
An instruction fetch unit in which an early instruction fetch is initiated to access a main memory simultaneously with checking a cache for the desired instruction. On a slow path to main memory is a large main translation lookaside buffer (TLB) that holds address translations. On a fast path...
The CPU begins program execution by fetching them one at a time. Fetch, decode and execute cycle are the three steps that the CPU repetitively performs to complete one program instruction. The control unit decodes the machine instructions following the i
A processor includes an instruction fetch unit providing a fetch address to the memory system; a branch buffer, a normal buffer, and a general buffer, which receive fetch instructions, respectively; a to-be-issued instruction selecting unit, which selects an instruction from the normal buffer, ...
A Method to Improve the Throughput of the Instruction Fetch Unit in SMT VLIW Processors In a simultaneous multithreaded processor, improving the throughput of the instruction fetch unit usually means that there is more drastic cache competitio... JH Wan,SM Chen - 《Computer Engineering & Science》...
On systems with multiple processors, non-blocking synchronization algorithms are much easier to implement[citation needed] if the instruction set includes support for something such as "fetch-and-add", "load-link/store-conditional" (LL/SC), or "atomic compare-and-swap". 参考译文:在具有多处理器...
The changes necessary to support simultaneous multithreading on that architecture are: multiple program counters and some mechanism by which the fetch unit selects one each cycle, a separate return stack for each thread for predicting subroutine return destinations, ...