CC78K0S Datasheet, PDF (383/520 Pages) NEC – C Compiler Ver.1.30 or Later Language

CHAPTER 11 EXTENDED FUNCTIONS
Rotate Function
#pragma rot
• Declare the use of the function for rotate by the #pragma rot directive of the module.
However, the following items can be described before #pragma rot.
• Comments
• Other #pragma directives
• Preprocessing directives that neither define nor reference variables or functions
• Keywords following #pragma can be described in either uppercase or lowercase letters.
EXAMPLE
(C source)
#pragma rot
unsigned char a = 0x11 ;
unsigned char b = 2 ;
unsigned char c ;
void main ( ) {
c = rorb(a, b) ;
}
(Output assembler source)
mov
mov
mov
ror
dbnz
mov
a,!_b
c,a
a,!_a
a, 1
c,$$-1
!_c,a
RESTRICTIONS
• The function names for rotate cannot be used as function names.
• The function names for rotate must be described in lowercase letters. If the functions for rotate are described
in uppercase letters, they are handled as ordinary functions.
User’s Manual U14872EJ1V0UM
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