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9.37.2 Symbolic Operand Modifiers

The RL78 has three modifiers that adjust the relocations used by the linker:

%lo16()

When loading a 20-bit (or wider) address into registers, this modifier selects the 16 least significant bits.

  movw ax,#%lo16(_sym)
%hi16()

When loading a 20-bit (or wider) address into registers, this modifier selects the 16 most significant bits.

  movw ax,#%hi16(_sym)
%hi8()

When loading a 20-bit (or wider) address into registers, this modifier selects the 8 bits that would go into CS or ES (i.e. bits 23..16).

  mov es, #%hi8(_sym)