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.

If you have a public document, related to the IA32® specifications and missing from the collection, please mail it to me. The content of this URL and all sub-ULRs is available for convenient bulk download by rsync x86docs password "" (empty).

BLR

Branch with link to register

This instruction calls a subroutine at an address in a register, setting register X30 to PC+4. This instruction provides a hint that this is a subroutine call.

Decode for this encoding

let n : integer{} = UInt(Rn);