target

When applied to a function, specifies that the function should be compiled with different target options than on the command line.

The passed string should be a comma-separated list of options. The options are passed to LLVM by adding them to the "target-features" function attribute, after minor processing: negative options (e.g. "no-sse") have the "no" stripped (--> "-sse"), whereas positive options (e.g. sse") gain a leading "+" (--> "+sse"). Negative options override positive options regardless of their order. The "arch=" option is a special case and is passed to LLVM via the "target-cpu" function attribute.

struct target {

string specifier;

}

Examples

import ldc.attributes;

@target("no-sse")
void foo_nosse(float *A, float* B, float K, uint n) {
    for (int i = 0; i < n; ++i)
        A[i] *= B[i] + K;
}
@target("arch=haswell")
void foo_haswell(float *A, float* B, float K, uint n) {
    for (int i = 0; i < n; ++i)
        A[i] *= B[i] + K;
}

The OpenD Programming Language

target

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