CC78K0S Datasheet, PDF (402/520 Pages) NEC – C Compiler Ver.1.30 or Later Language

(25) Pascal function
Pascal Function
CHAPTER 11 EXTENDED FUNCTIONS
_ _pascal
FUNCTION
• Generates the code that corrects the stack used for placing arguments during the function call on the called
function side, not on the side calling the function.
EFFECT
• Object code can be shortened if function calls appear in many places.
USAGE
• When a function is declared, add a _ _pascal attribute to the beginning.
RESTRICTIONS
• The pascal function does not support variable length arguments. If a variable length argument is defined, a
warning is output and the _ _pascal keyword is ignored.
• The keywords norec/_ _interrupt cannot be specified in a pascal function. If they are specified, in the case of
the norec keyword, the _ _pascal keyword is ignored and in the case of the _ _interrupt/_ _interrupt_brk/
_ _rtos_interrupt keywords, an error is output.
• If a prototype declaration is incomplete, normal operation may not be possible, so a warning message is
output when a pascal function’s physical definition or prototype declaration is missing.
• Pascal functions are not supported when the static model specification option (-SM) is specified. If -SM is
specified when using the pascal function, a warning message is output to the place where the _ _ pascal
keyword first appeared, and the _ _ pascal keyword in the input file is ignored.
EXPLANATION
• The -ZR option enables the change of all functions to the pascal function. However, if the pascal function is
used for functions that have few calls, the object code may increase.
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User’s Manual U14872EJ1V0UM