I am writing an assembly program for the Motorola 68000, and I am having trouble doing dynamic strings. I want to be able to append information to a string, and then print it out.
EDIT: Made some progress. I can dynamically generate a string, but to append to that string is a problem. I am having trouble using the kludgey pointer system here in Assembler. I cannot seem to use pointers to the actual buffer....
LEA bufferptr,A1 ; Load pointer to string buffer
LEA \1,A2 ; Load the string starting address
LEA \2,A3 ; Load the string ending address
for_loop\@ CMPA A2,A3 ; Check loop counters
BEQ loop_end\@ ; Check for ending loop
MOVE.B (A2),(A1)+ ; Move a character of string in A2 into the buffer
ADDA #1,A2 ; Increment the loop counter by 1
BRA for_loop\@ ; Loop again
LEA bufferptr,A1 ; Reload original pointing address of bufferptr
ADDA A3,A1 ; Add ending string address to bufferptr address
MOVE.L A1,bufferptr ; Store the new address into bufferptr
Here is an example in C++ of what to do in Assembly:
string str = "";
// doing stuff....
str += "ADDI.W ";
// more stuff....
str += " D2,D4";
cout << str << endl;
Edit: Solved, though not efficiently.