CSR Dependency Tracking Granularity

Name	Portions Tracked as Independent Units	Aliases
fflags	Bits 4, 3, 2, 1, 0	fcsr
frm	entire CSR	fcsr
fcsr	Bits 7-5, 4, 3, 2, 1, 0	fflags, frm

Note: read-only CSRs are not listed, as they do not participate in the definition of syntactic dependencies.

Source and Destination Register Listings

This section provides a concrete listing of the source and destination registers for each instruction. These listings are used in the definition of syntactic dependencies in Section [sec:memorymodel:dependencies].

The term “accumulating CSR” is used to describe a CSR that is both a source and a destination register, but which carries a dependency only from itself to itself.

Instructions carry a dependency from each source register in the “Source Registers” column to each destination register in the “Destination Registers” column, from each source register in the “Source Registers” column to each CSR in the “Accumulating CSRs” column, and from each CSR in the “Accumulating CSRs” column to itself, except where annotated otherwise.

Key:

^AAddress source register

^DData source register

^†The instruction does not carry a dependency from any source register to any destination register

^‡The instruction carries dependencies from source register(s) to destination register(s) as specified