/*
主函数基于课本151页的测试循环小程序进行编写
*/
int main()
{
init();//初始化
int i;
FILE* program;
program=fopen("input.txt","r+");//设置输入文件
//设置R1和R2
myRegister[1]=0x00008000;
myRegister[2]=0x00007F00;
double* test=myFloatReg+2;
*test=1.5;//设置F2
printf("/****************** 执行前*******************/\n从0(R1)到8(R2)的值向量(使用双精度浮点数型读)：\n");
for(i=0;i<=31;i++)
{
unsigned long long tmp=0;
double* p=&tmp;
unsigned short addr=addrToMyAddr(32768-8*i);
unsigned char* tmp_char=&tmp;
int j;
for(j=0;j<8;j++)
{
readMymemory(addr+j,tmp_char+j);
}
printf("%lf\n",*p);
}
printf("寄存器状态：\n");
printMygister(); //显示通用寄存器
printFloatReg(); //显示浮点数寄存器
exe(program);//开始执行
//显示存储器中的值向量
printf("/****************** 执行后*******************/\n从0(R1)到8(R2)的值向量(使用双精度浮点数型读):\n");
for(i=0;i<=31;i++)
{
unsigned long long tmp=0;
double* p=&tmp;
unsigned short addr=addrToMyAddr(32768-8*i);
unsigned char* tmp_char=&tmp;
int j;
for(j=0;j<8;j++)
{
readMymemory(addr+j,tmp_char+j);
}
printf("%lf\n",*p);
}
printf("寄存器状态：\n");
printMygister(); //显示通用寄存器
printFloatReg(); //显示浮点数寄存器
return 0;
}
/*
* The scoreboard processing function
*/
void scoreboard(){
printf("==================================\n Executing ... ... \n==================================\n");
// initialize the global variables: pc and clock.
// local variables:
// newIssue
// - if there is new instruction issued in the current clock cycle
// finished
// - if the program finished
pc = 0;
clock = 0;
int newIssue = 0;
int finished = 0;
#ifdef DEBUG
printf("clock: %d PC: %d\n", clock, pc);
printInstrStatus();
printIntReg();
printFloatReg();
printUnitStatus();
#endif /* DEBUG */
// processing the program until all the instructions are done.
// Or clock reaches the maximum clock cycles.
while(!finished && clock < MAX_CLK_CYCLES){
// Increase the clock and reset the newIssue and finished
clock++;
newIssue = 0;
finished = 1;
// check if it's issued
if(NULL!=instr[pc] && !instr[pc]->issued){
// check functional unit and rd availability
if(*(instr[pc]->fu)>0 &&((NULL==instr[pc]->rd) || (-1 == instr[pc]->rd->write))){
instr[pc]->issue = clock;
instr[pc]->issued = 1;
*(instr[pc]->fu) = *(instr[pc]->fu)-1;
if(NULL!=instr[pc]->rd){
instr[pc]->rd->write = pc;
}
if(NULL != instr[pc]->rs1 && instr[pc]->rs1->read<pc){
instr[pc]->rs1->read = pc;
}
if (NULL != instr[pc]->rs2 && instr[pc]->rs2->read<pc){
instr[pc]->rs2->read = pc;
}
#ifdef DEBUG
printf("Instr %d issued. \n", pc);
#endif /* DEBUG */
pc++;
newIssue = 1;
}
#ifdef DEBUG
else{
printf("Instr %d failed to issue. \n", pc);
}
#endif /* DEBUG */
}
// processes all the instructions
for(i=0;i<(pc-newIssue);i++){
#ifdef DEBUG
printf("Instr %d entered processing queue\n", i);
#endif /* DEBUG */
// check done
if(!instr[i]->done){
// check counterEX and wait index
if(-1 == instr[i]->counterEX){
if(NULL == instr[i]->rs2){
if(NULL==instr[i]->rs1 || instr[i]->rs1->write>=i || (-1==instr[i]->rs1->write)){
instr[i]->counterEX = 0;
instr[i]->read = clock;
if(NULL!=instr[i]->rs1){
instr[i]->updateRD = pc;
}
}
}else
// check rs1 and rs2 availability
if(((instr[i]->rs1->write>=i) || (-1==instr[i]->rs1->write)) && ((instr[i]->rs2->write>i) || (-1==instr[i]->rs2->write))){
instr[i]->counterEX = 0;
instr[i]->read = clock;
instr[i]->updateRD = pc;
}
} else{
if(instr[i]->counterEX+1 < instr[i]->clockEX){
instr[i]->counterEX++;
}else if(instr[i]->counterEX+1 == instr[i]->clockEX){
instr[i]->counterEX++;
instr[i]->ex = clock;
}else{
if(NULL==instr[i]->rd || instr[i]->rd->read>i || (-1 == instr[i]->rd->read)){
instr[i]->updateWR = 1;
instr[i]->done = 1;
instr[i]->wb = clock;
}
}
}
}
}
// update the register status tables
for(i=0;i<pc;i++){
if(instr[i]->updateWR){
if(NULL!=instr[i]->rd){
instr[i]->rd->write = -1;
}
*(instr[i]->fu)=*(instr[i]->fu)+1;
instr[i]->updateWR = 0;
}
if(instr[i]->updateRD){
if(i==instr[i]->rs1->read){
instr[i]->rs1->read = -1;
}
if(NULL != instr[i]->rs2 && (i==instr[i]->rs2->read)){
instr[i]->rs2->read = -1;
}
instr[i]->updateRD = 0;
}
}
// check if all the instructions are finished
i = 0;
while(finished && NULL != instr[i]){
if(!instr[i]->done){
finished = 0;
}
i++;
}
#ifdef DEBUG
printf("clock: %d PC: %d\n", clock, pc);
printInstrStatus();
printIntReg();
printFloatReg();
printUnitStatus();
#endif /* DEBUG */
}
printf("==================================\n Execution is DONE! \n==================================\n");
}
