how SVP64 is fundamentally applied, except with respect to early-out
opportunities and CTR-testing, which are outlined below.
-# Description and Modes
+# Horizontal-First and Vertical-First Modes
In SVP64 Horizontal-First Mode, the first failure in ALL mode (Great Big
AND) results in early exit: no more updates to CTR occur (if requested);
in Vertical-First Mode, a test designed to be done on multiple
bits is meaningless.
+# Description and Modes
+
Predication in both INT and CR modes may be applied to `sv.bc` and other
SVP64 Branch Conditional operations, exactly as they may be applied to
other SVP64 operations. When `sz` is zero, any masked-out Branch-element