CC78K4 Datasheet, PDF (300/523 Pages) NEC – CC78K4 Ver.2.30 or Later, C Compiler Language

CHAPTER 11 EXTENDED FUNCTIONS
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EXPLANATION
• To use register variables, you only need to declare them with the register storage class specifier.
• Label _@KREG00, etc. includes the modules declared with PUBLIC in the library attached to this C compiler.
COMPATIBILITY
From another C compiler to this C compiler
• Modification is not required if the other C compiler supports register declarations.
• When changing to register variables, add the register declarations for the variables to the program.
From this C compiler to another C compiler
• Modification is not required if the other compiler supports register declarations.
• How many variable registers can be used and to which area they will be allocated depends on the
implementation of the other C compiler.
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User’s Manual U15556EJ1V0UM