/*******************************************************************
QuickSort : Perform the quick sort operation. If size of array is
: below the threshold, then use bubble sort, else
: divide the job and insert one part into the task stack
*******************************************************************/
QuickSort(register int i, register int j)
{
register int pivot, k;
QSORT:
/* pivot is index of the pivot element */
if(j-i+1 < BubbleThresh) {
if(bubble) BubbleSort(i,j);
else LocalQuickSort(i,j);
return;
}
pivot = FindPivot(i,j);
k = Partition(i,j,gMem->A[pivot]);
if(k-i > j-k) {
/* The lower half [i through (k-1)] contains more entries. */
/* Put the other half into the queue of unsorted subarrays */
/* and recurse on the other half. */
PushWork(k,j);
j=k-1;
goto QSORT;
/* QuickSort(i, k-1); */ /* eliminating tail recursion */
}
else {
PushWork(i,k-1);
i=k;
goto QSORT;
/* QuickSort(k,j); */ /* Eliminating tail recursion */
}
}
//
//
// void LocalQuickSort(int,int);
//
//
void LocalQuickSort(int i, int j){
int pivot, k;
if (j <= i) {
return;
}
if (debug) {
fprintf(stderr,"\t%d: Local QuickSorting %d-%d.\n", Tmk_proc_id, i, j);
}
pivot = FindPivot(i,j);
//pivot = (i + j) >> 1;
k = Partition(i, j, gMem->A[pivot]);
if (debug) {
fprintf(stderr,"\t%d: Splitting at %d-%d:%d-%d\n", Tmk_proc_id,i,k-1,k,j);
}
if (k > i) {
LocalQuickSort(i, k-1);
LocalQuickSort(k, j);
}
else {
LocalQuickSort(i + 1, j);
}
}
//
// void QuickSort(int,int);
//
void QuickSort(int i, int j){
int pivot, k;
if (debug) {
fprintf(stderr,"\t%d: QuickSorting %d-%d.\n", Tmk_proc_id, i, j);
}
// pivot is index of the pivot element
if (j-i+1 < BubbleThresh) {
if (bubble) {
BubbleSort(i,j);
}
else {
LocalQuickSort(i,j);
}
return;
}
pivot = FindPivot(i,j);
k = Partition(i, j, gMem->A[pivot]);
if(debug){
fprintf(stderr,"\t%d: Splitting at %d-%d:%d-%d\n", Tmk_proc_id,i,k-1,k,j);
}
#define FAST_SEQUENTIAL
#ifdef FAST_SEQUENTIAL
if (Sequential) {
QuickSort(i, k-1);
QuickSort(k, j);
return;
}
#endif // FAST_SEQUENTIAL
if (k-i > j-k) {
// The lower half [i through (k-1)] contains more entries.
// Put the other half into the queue of unsorted subarrays
// and recurse on the other half.
PushWork(k, j);
QuickSort(i, k-1);
}
else {
// The lower half [i through (k-1)] contains more entries.
// Put the other half into the queue of unsorted subarrays
// and recurse on the other half.
PushWork(i,k-1);
QuickSort(k,j);
}
}
LocalQuickSort(int i, int j)
{
int pivot, k;
LQSORT:
if (j <= i) return;
pivot = FindPivot(i,j);
k = Partition(i,j,gMem->A[pivot]);
if (k > i) {
LocalQuickSort(i, k-1);
i=k;
goto LQSORT;
}
else {
i=i+1;
goto LQSORT;
}
}
