[libre-riscv-dev] VBLOCK - rerun the VL section

[Luke Kenneth Casson Leighton]

It just occurred to me that by jumping back to the start of the VBLOCK with
a beq, that is precisely the conditions I wanted.

My concern was having to redo the predicate table lookup however if the PC
points to the beginning of the VBLOCK and a branch to the beginning is
requested, this special case can be detected.

The SETVL can be redone but there is no need to reload the other tables.

L.



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