void stringz_ins(){
spToken = nextToken();
accept(TC_STRING_LIT, "String literal expected.");
char* lit = spToken.source;
int i;
for (i = 0; i < spToken.intValue; i++){
char ch = lit[i];
strcpy(outputBuffer, unsignedBinary(ch, 16));
outputBinary();
}
strcpy(outputBuffer, FILL_ZERO);
outputBinary();
spAddress += spToken.intValue - 2;
finishInstruction();
}
void fill_ins(){
spToken = nextToken();
accept(TC_INT, "Integer literal expected.");
strcpy(outputBuffer, signedBinary(spToken.intValue, 16));
outputBinary();
finishInstruction();
}
void jsr_ins(){
strcpy(outputBuffer, spToken.binary);
spToken = nextToken();
processLabel(11);
outputBinary();
finishInstruction();
}
void add_or_and_ins(){
strcpy(outputBuffer, spToken.binary);
spToken = nextToken();
accept(TC_REG, "Register expected.");
strcat(outputBuffer, spToken.binary);
spToken = nextToken();
accept(TC_COMMA, "Comma expected.");
spToken = nextToken();
accept(TC_REG, "Register expected.");
strcat(outputBuffer, spToken.binary);
spToken = nextToken();
accept(TC_COMMA, "Comma expected.");
spToken = nextToken();
if (spToken.type == TC_REG){
strcat(outputBuffer, "000");
strcat(outputBuffer, spToken.binary);
}
else if (spToken.type == TC_INT){
strcat(outputBuffer, "1");
if (spToken.intValue < -16 || spToken.intValue > 15)
putError("Integer literal too large or too small.");
else
strcat(outputBuffer, signedBinary(spToken.intValue, 5));
}
else
putError("Register or immediate operand expected.");
outputBinary();
finishInstruction();
}
void jmp_ins(){
strcpy(outputBuffer, spToken.binary);
spToken = nextToken();
accept(TC_REG, "Register expected.");
strcat(outputBuffer, spToken.binary);
strcat(outputBuffer, SIX_ZEROS);
outputBinary();
finishInstruction();
}
void trap_ins(){
strcpy(outputBuffer, spToken.binary);
if (spToken.type == TC_TRAP){
spToken = nextToken();
accept(TC_INT, "Trap vector expected.");
strcat(outputBuffer, unsignedBinary(spToken.intValue, 12));
}
outputBinary();
finishInstruction();
}
void blkw_ins(){
strcpy(outputBuffer, FILL_ZERO);
spToken = nextToken();
accept(TC_INT, "Integer literal expected.");
int i;
for (i = 1; i <= spToken.intValue; i++)
outputBinary();
spAddress += spToken.intValue - 1;
finishInstruction();
}
void orig_ins(){
if (spToken.type = TC_ORIG){
spToken = nextToken(); // First pass guarantees an int here
spAddress = spToken.intValue - 1;
spToken = nextToken();
finishInstruction();
}
strcpy(outputBuffer, unsignedBinary(spAddress, 16));
outputBinary();
}
void ld_ldi_lea_st_sti_ins(){
strcpy(outputBuffer, spToken.binary);
spToken = nextToken();
accept(TC_REG, "Register expected.");
strcat(outputBuffer, spToken.binary);
spToken = nextToken();
accept(TC_COMMA, "Comma expected.");
spToken = nextToken();
processLabel(9);
outputBinary();
finishInstruction();
}
void not_ins(){
strcpy(outputBuffer, spToken.binary);
spToken = nextToken();
accept(TC_REG, "Register expected.");
strcat(outputBuffer, spToken.binary);
spToken = nextToken();
accept(TC_COMMA, "Comma expected.");
spToken = nextToken();
accept(TC_REG, "Register expected.");
strcat(outputBuffer, spToken.binary);
outputBinary();
finishInstruction();
}
void ldr_or_str_ins(){
strcpy(outputBuffer, spToken.binary);
spToken = nextToken();
accept(TC_REG, "Register expected.");
strcat(outputBuffer, spToken.binary);
spToken = nextToken();
accept(TC_COMMA, "Comma expected.");
spToken = nextToken();
accept(TC_REG, "Register expected.");
strcat(outputBuffer, spToken.binary);
spToken = nextToken();
accept(TC_COMMA, "Comma expected.");
spToken = nextToken();
accept(TC_INT, "Integer literal expected.");
if (spToken.intValue < -32 || spToken.intValue > 31)
putError("Integer literal too large or too small.");
else
strcat(outputBuffer, signedBinary(spToken.intValue, 6));
outputBinary();
finishInstruction();
}
int main(void)
{
char naturalInput[256];
int naturalLength;
while(1)
{
printf("Input a natural number in decimal representation.\n");
printf(">");
fgets(naturalInput, 256, stdin);
removeNewline(naturalInput); //Remove newline character from array.
naturalLength = strlen(naturalInput);
if(isValidNumber(naturalInput, naturalLength) == 1) //Check if array contains non-digits.
outputBinary(naturalInput);
else
printf("\nPlease input a natural number in decimal representation.\n");
}
return 0;
}
void ret_or_rti_ins(){
strcpy(outputBuffer, spToken.binary);
outputBinary();
finishInstruction();
}
