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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.