Справочник Пользователя для AMD 250
88
Instruction-Decoding Optimizations
Chapter 4
25112
Rev. 3.06
September 2005
Software Optimization Guide for AMD64 Processors
4.11
8-Bit Sign-Extended Displacements
Optimization
Use 8-bit sign-extended displacements for conditional branches.
Application
This optimization applies to:
•
32-bit software
•
64-bit software
Rationale
Using short, 8-bit sign-extended displacements for conditional branches improves code density with
no negative affects on the processor.
no negative affects on the processor.