Function Return Values

Function return values are always passed using CPU registers. The following table lists the possible return types and the registers used for each.

Return Type	Register	Description
bit	Carry Flag	Single bit returned in the carry flag
char, unsigned char, 1-byte ptr	R7	Single byte typed returned in R7
int, unsigned int, 2-byte ptr	R6 & R7	MSB in R6, LSB in R7
¤ unsigned ¥ long	R4 - R7	MSB in R4, LSB in R7
float	R4 - R7	32-Bit IEEE format
untyped ptr	R1 - R3	Memory type in R3, MSB R2, LSB R1