math.lis

cypress 的PSOC DESIGNER 4.4如何在C语言中调用汇编程序.

                        .module math.c
                        .area text(rom, con, rel)
 0000                   .dbfile ./math.c
 0000                   .dbfunc e Addition _Addition fV
 0000           _Addition::
 0000                   .dbline -1
 0000                   .dbline 21
 0000           ; #include <..\math.h>          //Place the include file here. '..\. used to locate the math.h
 0000           ; 
 0000           ; //We need to tell the compiler that we are going to use some variables outside
 0000           ; //this file. We use the 'extern' keyword. The format for using extern is:
 0000           ; //  extern <type> RamLocation   
 0000           ; // extern - Keyword to tell the compiler the location is outside this module
 0000           ; // <type> - Type is the C declaration (char,int) of the ram location - default is int
 0000           ; //                    Ex. Var  blk  1 equates to char
 0000           ; //                        Var  blk  2 equates to int
 0000           ; //                            Var  blk  4 equates to long
 0000           ; // RamLocation - This is the name of the ram location with the _ we declared in main.asm
 0000           ; 
 0000           ; extern int   OperandOne;              //Notice we dont have the _ we just need it on the export
 0000           ; extern int   OperandTwo;
 0000           ; extern long  OperandThree;
 0000           ; extern long  Result;
 0000           ; 
 0000           ; //Here we declare our C Function. We do not use the _ even though we call it using
 0000           ; //the _
 0000           ; void Addition()
 0000           ; {
 0000                   .dbline 25
 0000           ;       //In this function we will add the two numbers in OperandOne and OperandTwo
 0000           ;       //We will place the location in Result
 0000           ; 
 0000           ;       Result = OperandTwo + OperandOne;
 0000 5101              mov A,[_OperandTwo+1]
 0002 0201              add A,[_OperandOne+1]
 0004 5300              mov [__r1],A
 0006 5100              mov A,[_OperandTwo]
 0008 0A00              adc A,[_OperandOne]
 000A 5F0300            mov [_Result+3],[__r1]
 000D 5302              mov [_Result+2],A
 000F 470280            tst [_Result+2],-128
 0012 A009              jz X0
 0014 5501FF            mov [_Result+1],-1
 0017 5500FF            mov [_Result],-1
 001A 8007              jmp X1
 001C           X0:
 001C 550100            mov [_Result+1],0
 001F 550000            mov [_Result],0
 0022           X1:
 0022                   .dbline -2
 0022                   .dbline 27
 0022           ; 
 0022           ; }
 0022           L1:
 0022                   .dbline 0 ; func end
 0022 7F                ret
 0023                   .dbend
 0023                   .dbfunc e Multiplication _Multiplication fV
 0023           _Multiplication::
 0023                   .dbline -1
 0023                   .dbline 30
 0023           ; 
 0023           ; void Multiplication()
 0023           ; {
 0023                   .dbline 34
 0023           ;       
 0023           ;       //Lets perform a larger calculation that might be a little tougher in
 0023           ;       //assembly
 0023           ;       Result = OperandThree * OperandOne;
 0023 5F0001            mov [__r3],[_OperandOne+1]
 0026 5F0000            mov [__r2],[_OperandOne]
 0029 470080            tst [__r2],-128
 002C A009              jz X2
 002E 5500FF            mov [__r1],-1
 0031 5500FF            mov [__r0],-1
 0034 8007              jmp X3
 0036           X2:
 0036 550000            mov [__r1],0
 0039 550000            mov [__r0],0
 003C           X3:
 003C 5100              mov A,[__r0]
 003E 08                push A
 003F 5100              mov A,[__r1]
 0041 08                push A
 0042 5100              mov A,[__r2]
 0044 08                push A
 0045 5100              mov A,[__r3]
 0047 08                push A
 0048 5100              mov A,[_OperandThree]
 004A 08                push A
 004B 5101              mov A,[_OperandThree+1]
 004D 08                push A
 004E 5102              mov A,[_OperandThree+2]
 0050 08                push A
 0051 5103              mov A,[_OperandThree+3]
 0053 08                push A
 0054 7C0000            xcall __mul_32X32_32
 0057 38FC              add SP,-4
 0059 18                pop A
 005A 5303              mov [_Result+3],A
 005C 18                pop A
 005D 5302              mov [_Result+2],A
 005F 18                pop A
 0060 5301              mov [_Result+1],A
 0062 18                pop A
 0063 5300              mov [_Result],A
 0065                   .dbline -2
 0065                   .dbline 36
 0065           ; 
 0065           ; }
 0065           L2:
 0065                   .dbline 0 ; func end
 0065 7F                ret
 0066                   .dbend