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).

MRRS

Move System register to two adjacent general-purpose registers

This instruction allows the PE to read an AArch64 128-bit System register into two adjacent 64-bit general-purpose registers.

System
(FEAT_SYSREG128)

Decode for this encoding

if !IsFeatureImplemented(FEAT_SYSREG128) then EndOfDecode(Decode_UNDEF); end; if Rt[0] == '1' then EndOfDecode(Decode_UNDEF); end; let t : integer = UInt(Rt); let t2 : integer = UInt(Rt+1); let sys_L : bits(1) = L; let sys_op0 : bits(2) = '1' :: o0; let sys_op1 : bits(3) = op1; let sys_op2 : bits(3) = op2; let sys_crn : bits(4) = CRn; let sys_crm : bits(4) = CRm;