用PICC编译器开发PIC系列单片机的代码(2)

Unsigned char add_function(unsigned char augend,unsigned char addend);

Void main(void)

{

unsigned char temp1,temp2,temp3;

tem3=add_function(temp1,temp2);

}

unsigned char add_function(unsigned char augend,unsigned char addend)

{

return(augend addend);

}

编译后生成的汇编程序为：

_main

; _temp2 assigned to?a_main 0

；_temp3 assigned to ?a_main 1

; _temp1 assigned to ?a_main 2

bcf status,5

bcf status,6

movf (((?a_main 0))),w

movwf(((?_add_function)))

movf (((?a_main 2))),w

fcall (_add_function)

movwf(((?a_main 1)))

_add_function

; _augend assigned to ?a_add_function 0

; _augend stored from w

bcf status,5

bcf status,6

movwf(((?a_add_function 0)))

movf (((?a_add_function 0))),w

addwf (((