General Compiler Directive: Controls how the "stores" of register contents to storage are performed (streaming versus non-streaming). These directives are only available on IA-32 architecture and Intel® 64 architecture.
cDEC$ VECTOR TEMPORAL
cDEC$ VECTOR NONTEMPORAL [(var[, var]...)]
c |
Is one of the following: C (or c), !, or *. (See Syntax Rules for Compiler Directives.) |
val |
Is an optional memory reference in the form of a variable name. |
VECTOR NONTEMPORAL directs the compiler to use non-temporal (that is, streaming) stores. VECTOR TEMPORAL directs the compiler to use temporal (that is, non-streaming) stores.
By default, the compiler automatically determines whether a streaming store should be used for each variable.
Streaming stores may cause significant performance improvements over non-streaming stores for large numbers on certain processors. However, the misuse of streaming stores can significantly degrade performance.
For more information on this directive, including an example, see Optimizing Applications: Vectorization Support.