Fujitsu MB91191 ユーザーズマニュアル

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details of the branch commands.

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Logical operation and bit operation

Logic operation instruction can perform AND, OR, and EOR logic operations between general-purpose

registers, or between a general-purpose register and the memory (or I/O). Moreover, the bit operation

instruction can operate the content of the memory (And, I/O) directly. The register of the memory

addressing is generally indirect.

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Direct addressing

Direct addressing commands are used to access between I/O and general-purpose registers, or between I/O

and the memory. The I/O address can be accessed quickly and efficiently by direct specification within the

command instead of indirect register. Indirect memory addressing to the register with register increment/

decrement is also enabled for some commands.

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Others

This command executes flag set up within the PS register, stack operation, code/zero expansion, etc. Also

equipped with high-level language supported function entry/exit, and register multi-load/store commands.