uint32_t ass_multiply(char *instruction) {
char *mnemonic = get_mnemonic(instruction);
char *rest = get_rest(instruction);
char Rd[2], Rm[2], Rs[2], Rn[2];
uint32_t RdI, RmI, RsI, RnI;
uint32_t result = (111 << 29) | (1 << 4) | (1 << 7);
if (strcmp(mnemonic,"mul") == 0) {
sscanf(rest, "%[^','],%[^','],%s", Rd, Rm, Rs);
RnI = 0;
} else {
sscanf(rest, "%[^','], %[^','], %[^','],%s", Rd, Rm, Rs, Rn);
result |= (1 << 21);
RnI = reg_from_string(Rn);
}
RdI = reg_from_string(Rd);
RmI = reg_from_string(Rm);
RsI = reg_from_string(Rs);
result |= (RdI << 16) | (RnI << 12) | (RsI << 8) | (RmI & mask4);
free(mnemonic);
free(rest);
return result;
}
int preprocess_get_line ( char read_in_line [], char label [] , char instruction [] ){
/************************************************
process lines
************************************************/
int a = 0;
int * check_mark = &a;
// printf("00#%s#", read_in_line);
// 1. remove comment, semicolom, and empty line
read_in_line = get_line_before_semicol(read_in_line, check_mark);
// printf("label#%s# instruction#%s#\n", label, instruction);
// printf("1 #%s#\n\n", read_in_line);
// 2. detect label
read_in_line = get_label_instruction(read_in_line, label);
// printf("label#%s# instruction#%s#\n", label, instruction);
// printf("2 #%s#\n\n", read_in_line);
// 3. find mnemonic
read_in_line = get_mnemonic(read_in_line, instruction);
// printf("label#%s# instruction#%s#\n", label, instruction);
// printf("3 #%s#\n\n", read_in_line);
// 4. find quotation
read_in_line = get_quotation(read_in_line, instruction);
// printf("label#%s# instruction#%s#\n", label, instruction);
// printf("4 #%s#\n\n", read_in_line);
// 5. put rest segments together, one comma is also a segment
read_in_line = get_operations(read_in_line, instruction);
// printf("label#%s# instruction#%s#\n", label, instruction);
print_output_line(label, instruction);
return * check_mark;
}
