[Libre-soc-isa] [Bug 1081] New: pay special attention to stfiwx UNDEFINED behaviour

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=1081

            Bug ID: 1081
           Summary: pay special attention to stfiwx UNDEFINED behaviour
           Product: Libre-SOC's first SoC
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: CONFIRMED
          Severity: enhancement
          Priority: ---
         Component: Specification
          Assignee: lkcl at lkcl.net
          Reporter: lkcl at lkcl.net
                CC: libre-soc-isa at lists.libre-soc.org
   NLnet milestone: ---

public v3.1 p182

If the contents of register FRS were produced, either
directly or indirectly, by a Load Floating-Point Single
instruction, a single-precision Arithmetic instruction, or
frsp, then the value stored is undefined. (The contents
of register FRS are produced directly by such an instruc-
tion if FRS is the target register for the instruction. The
contents of register FRS are produced indirectly by such
an instruction if FRS is the final target register of a
sequence of one or more Floating-Point Move instruc-
tions, with the input to the sequence having been pro-
duced directly by such an instruction.)

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