VMS Help  —  MACRO  /ALPHA  MACRO-64 Alpha Architecture Quick Reference, Instruction Operand Notation
    Instruction Operand Notation shows the notation for instruction
    operands. The notation format is as follows:

    <name>.<access type><data type>

    Table 12 Instruction Operand Notation

    <name>:
    disp Displacement field
    fnc  PALcode function field
    Ra   Integer register operand in the Ra field
    Rb   Integer register operand in the Rb field
    #b   Integer literal operand in the Rb field
    Rc   Integer register operand in the Rc field
    Fa   Floating-point register operand in the Ra field
    Fb   Floating-point register operand in the Rb field
    Fc   Floating-point register operand in the Rc field

    <access type>:
    a    The operand is used in an address calculation to form an
         effective address. The data-type code that follows indicates
         the units of addressability (or scale factor) applied to
         this operand when the instruction is decoded.
    i    The operand is an immediate literal.
    m    The operand is both read and written.
    r    The operand is read only.
    w    The operand is write only.

    <data type>:
    b    Byte
    f    F_floating
    g    G_floating
    l    Longword
    q    Quadword
    s    IEEE single floating (S_floating)
    t    IEEE double floating (T_floating)
    w    Word
    x    The data type is specified by the instruction.
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