Code scheduling is used to cover dependency detection and resolution and parallel optimization. Code scheduling is generally adept in conjunction with traditional compilation. A code scheduler gets as input a set, or a sequence, of executable instruction, and a set of precedence constraints enforced on them, frequently in the form ... Read More

VLIW stands for Very long instruction word. It is an instruction set architecture designed to take complete benefit of instruction-level parallelism (ILP) for revised implementation. Central processing unit processors enables programs to determine instructions to execute in sequence only although a VLIW processors enable programs to explicitly define instructions to ... Read More

The layout of a processor pipeline affects load-use delay. The figure shows the traditional RISC, MIPS, and CISC pipeline layouts and the associated load-use delays.In the case of a traditional four-stage RISC pipeline, first, the registers are accessed for the components of an address calculation, such as the content of ... Read More

In this section, we are concerned with an important performance measure of pipelined load/store processing such as load-use delay. The value of the load-use delay is a characteristic attribute of pipelined execution of loads. Large load-use values can seriously impede processor performance, especially in a superscalar processor.Load-use delays arise from ... Read More

Load and Stores are frequent operations, especially in RISC code. While executing RISC code we can expect to encounter about 25-35% load instructions and about 10% store instructions. Hence, it is one of big significance to execute load and store instructions effectively.It can summarize the subtasks which have to be ... Read More

FX Pipelines can be implemented as either universal or dedicated FX units. Furthermore, a processor can incorporate either a single universal unit multiple universal units.Single Universal FX UnitsAll earlier and some current designs employ a single universal FX Pipeline, which is a single FX unit as shown in the figure. ... Read More

A logical layout of an FX pipeline consists, first of the specification of how many stages an FX pipeline has and what tasks are to be performed in these stages. The other key aspect of the design space is how FX pipelines are implemented. FX pipeline can be interpreted in ... Read More

Performance in an unpipelined processor is characterized by the cycle time and the execution time of the instructions. In the case of pipelined execution, instruction processing is interleaved in the pipeline rather than performed sequentially as in non-pipelined processors. Therefore the concept of the execution time of instruction has no ... Read More

Pipelined instruction processing covers two key elements as the specification, or logical layout, and the implementation of instruction pipelines. The logical layout determines the tasks to be adept. It consists of the declaration of the pipelines to be executed and for each of the pipelines a detailed specification of the ... Read More

Pipelining defines the temporal overlapping of processing. Pipelines are emptiness greater than assembly lines in computing that can be used either for instruction processing or, in a more general method, for executing any complex operations. It can be used efficiently only for a sequence of the same task, much similar ... Read More