[libre-riscv-dev] [Bug 313] Create Branch Pipeline for POWER9

bugzilla-daemon at libre-soc.org bugzilla-daemon at libre-soc.org
Fri May 22 03:39:44 BST 2020


--- Comment #31 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---

is that supposed to be a full 32 bit ranged lookup?

for branch, the full 32 bit CR is needed and BI looks up ...

oh i see.

the idea is to use 3 bits of BI to look up CR00 to 7

then in OP_BC look up the remaining 2 bits of BI to select which bit of CRn is
to be used, right?

that's neat because different branches ysing different CRs would not block on
the CR regfile.

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