[Libre-soc-bugs] [Bug 238] POWER Compressed Formal Standard writeup
bugzilla-daemon at libre-soc.org
bugzilla-daemon at libre-soc.org
Wed Dec 2 22:20:12 GMT 2020
https://bugs.libre-soc.org/show_bug.cgi?id=238
--- Comment #173 from Alexandre Oliva <oliva at gnu.org> ---
in comment 159, I asked what mode branch targets had to be in
we have to keep in mind that bl will eventually make the next insn a branch
target for blr, so the insn after bl also has to satisfy the properties of
branch targets. therefore branch-and-link doesn't need for M or N ever: the
(statically) next insn must be in uncompressed mode.
we also have to look into the implications of what the linker may have to
change, both in the b-and-l and in the next insn, to see whether our bl insn
can be successfully modified by the linker, if it needs to do that
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