Add a document to show how to customize VCIX instructions scheduling
information. Due to the lack of scheduling info "plugin" in LLVM, a user
has to modify the scheduling model files to reflect the latency,
occupancy etc. of their co-processor instructions connected through
VCIX. This document shows how to modify those files.
This document was originally written in another documentation format by
the listed authors, I used AI to convert it to RST and checked the
content.
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Co-authored-by: Craig Topper <craig.topper@sifive.com>
Co-authored-by: Michael Maitland <michaeltmaitland@gmail.com>
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