Info Catalog as: M32C-Syntax as: M32C-Chars

as: M32C-Modifiers

 
 9.19.2.1 Symbolic Operand Modifiers
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 The assembler supports several modifiers when using symbol addresses in
 M32C instruction operands.  The general syntax is the following:
 
      %modifier(symbol)
 
 '%dsp8'
 '%dsp16'
 
      These modifiers override the assembler's assumptions about how big
      a symbol's address is.  Normally, when it sees an operand like
      'sym[a0]' it assumes 'sym' may require the widest displacement
      field (16 bits for '-m16c', 24 bits for '-m32c').  These modifiers
      tell it to assume the address will fit in an 8 or 16 bit
      (respectively) unsigned displacement.  Note that, of course, if it
      doesn't actually fit you will get linker errors.  Example:
 
           mov.w %dsp8(sym)[a0],r1
           mov.b #0,%dsp8(sym)[a0]
 
 '%hi8'
 
      This modifier allows you to load bits 16 through 23 of a 24 bit
      address into an 8 bit register.  This is useful with, for example,
      the M16C 'smovf' instruction, which expects a 20 bit address in
      'r1h' and 'a0'.  Example:
 
           mov.b #%hi8(sym),r1h
           mov.w #%lo16(sym),a0
           smovf.b
 
 '%lo16'
 
      Likewise, this modifier allows you to load bits 0 through 15 of a
      24 bit address into a 16 bit register.
 
 '%hi16'
 
      This modifier allows you to load bits 16 through 31 of a 32 bit
      address into a 16 bit register.  While the M32C family only has 24
      bits of address space, it does support addresses in pairs of 16 bit
      registers (like 'a1a0' for the 'lde' instruction).  This modifier
      is for loading the upper half in such cases.  Example:
 
           mov.w #%hi16(sym),a1
           mov.w #%lo16(sym),a0
           ...
           lde.w [a1a0],r1
 

Info Catalog as: M32C-Syntax as: M32C-Chars