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Name

qutil_double_mult, qutil_uint_mult, qutil_int_mult - multiply an array in parallel

Synopsis

#include <qthread.h>
#include <qthread/qutil.h>

double
qutil_double_mult (double *array, size_t length, int checkfeb);

unsigned int
qutil_uint_mult (unsigned int *array, size_t length, int checkfeb);

int
qutil_int_mult (int *array, size_t length, int checkfeb);

Description

These functions take as input an array of length numbers and will return the product of those numbers. This product is computed in parallel by using a lagging-loop structure, using futures to restrict the parallelism to the available limits.

If checkfeb is non-zero, these functions will wait for the entries in the array to be full before multiplying them. They DO NOT check whether the array entries are properly aligned. If the datatype is too small to do a FEB operation on, they will abort, if sanity checks are turned on.

Return Value

The product of the first length entries of array.

See Also

qutil_double_sum(3) , qutil_double_max(3) , qutil_double_min(3) , qutil_uint_sum(3) , qutil_uint_max(3) , qutil_uint_min(3) , qutil_int_sum(3) , qutil_int_max(3) , qutil_int_min(3) , qutil_mergesort(3) , qutil_qsort(3)


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