Instruction format:
- svstep RT,SVi,vf
- svstep. RT,SVi,vf
-
+ svstep RT,SVi,vf (Rc=0)
+ svstep. RT,SVi,vf (Rc=1)
+
+When `vf=1` then the REMAP Schedule for a given SVSHAPE, specified
+in `SVi` (values 0-3 are legal) may be
+returned in `RT`. To obtain the full set of possible computed element
+indices use `svstep RT.v,SVI,1` which will store all computed element
+indices, starting from RT. If Rc=1 then a co-result Vector of CR Fields
+will also be returned, comprising the "end-points" of each of the inner
+loops when either Matrix Mode or DCT/FFT is set. In other words,
+for example, when the `xdim` inner loop reaches the end and on the next
+iteration it will begin again at zero, the CR Field `EQ` will be set.