This is a collection of Intel®’ IA32® Software Developer's Manuals (URL of the day) and AMD' AMD64 Architecture Programmer's Manual together with the related specifications, application notes, white papers, and change logs. The collection aims to keep all available revisions. It was originally created by Michal Necasek, see OS/2 Museum.

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SB

Speculation barrier

This instruction is a barrier that controls speculation. For more information and details of the semantics, see Speculation Barrier (SB).

System
(FEAT_SB)

Decode for this encoding

if !IsFeatureImplemented(FEAT_SB) then EndOfDecode(Decode_UNDEF); end;