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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TBNZ

Test bit and branch if nonzero

This instruction compares the value of a bit in a general-purpose register with zero, and conditionally branches to a label at a PC-relative offset if the comparison is not equal. This instruction provides a hint that this is not a subroutine call or return. This instruction does not affect condition flags.

Decode for this encoding

let t : integer = UInt(Rt); let datasize : integer{} = 32 << UInt(b5); let bit_pos : integer = UInt(b5::b40); let offset : bits(64) = SignExtend{}(imm14::'00');