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Sail is a language for defining the instruction-set architecture (ISA) semantics of processors: the architectural specification of the behaviour of machine instructions. Sail is an engineer-friendly language, much like earlier vendor pseudocode, but more precisely defined and with tooling to support a wide range of use-cases.
Processors with different microarchitectures can share a common instruction set. For example, the Intel Pentium and the AMD Athlon implement nearly identical versions of the x86 instruction set, but they have radically different internal designs.
2 paź 2019 · Machine Language Instructions. 1-10 bytes of information read from memory. Can determine instruction length from first byte Not as many instruction types and simpler encoding than x86-64. Each instruction accesses and modifies some part(s) of the program state.
This section presents a guide to the X86-64 instruction set and architecture. Includes example code, a link to a more complete reference, and information on registers, instruction set, stack organization, and calling convention.
An Instruction Set Architecture (ISA) defines the communication rules between the hardware and software of the computer. The ISA is a design principle (conceptual) and not stored in a computer’s memory. Some things an ISA defines: - How binary instructions are formatted. - What instructions are available to be.
The objectives of this module is to understand the importance of the instruction set architecture, discuss the features that need to be considered when designing the instruction set architecture of a machine and look at an example ISA, MIPS.
The Instruction Set Architecture (ISA) • The ISA is the set of instructions a computer can execute • All programs are combinations of these instructions • It is an abstraction that programmers (and compilers) use to express computations • The ISA defines a set of operations, their semantics, and rules for their use.
