LayoutCSR¶
Usage
use LayoutCSR;
-
class
CSR
¶ This CSR layout provides a Compressed Sparse Row implementation for Chapel's sparse domains and arrays.
To declare a CSR domain, invoke the
CSR
constructor without arguments in a dmapped clause. For example:use LayoutCSR; var D = {1..n, 1..m}; // a default-distributed domain var CSR_Domain: sparse subdomain(D) dmapped CSR();
To declare a CSR array, use a CSR domain, for example:
// assume the above declarations var CSR_Array: [CSR_Domain] real;
This domain map is a layout, i.e. it maps all indices to the current locale. All elements of a CSR-distributed array are stored on the locale where the array variable is declared.