tree b50fcc41ad5d61c5bdf7479e1964c7eaecde9007
parent 24f2a9140d04a10c87fbc1f059aa69a9d661fb20
author Rupert Swarbrick <rswarbrick@lowrisc.org> 1599564292 +0100
committer Rupert Swarbrick <rswarbrick@gmail.com> 1599664176 +0100

[otbn] Store bytes to memory in BN.SID

Here, model.state.wreg[wrs] is a Register object (from riscvmodel).
Its "int" coercion gets a 2's complement signed integer. For
load/store instructions, we definitely don't want signs. In fact, we
really want the raw bytes. The calculation of "value" in
BNSID.execute() could be moved into the Register class.

Signed-off-by: Rupert Swarbrick <rswarbrick@lowrisc.org>