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CVS commit: src/sys/arch/amiga/stand/bootblock/boot

Module Name:    src
Committed By:   rin
Date:           Fri Apr 29 06:42:58 UTC 2022

Modified Files:
        src/sys/arch/amiga/stand/bootblock/boot: bbstart.s

Log Message:
Fix boot.amiga when relocation table is located beyond 0x8000.

In this case, we cannot load reltab directly into %a2 by movw:

For m68k, movw is actually synonym for different instructions when
its destination is data or address register, respectively.

(1) For data register, it is for move.w, which loads source into lower
    half word with upper wharf word being kept untouched.

(2) For address register, it is movea.w, which loads source with
    *sign extension*.

We should really stop using movw, and use move.w or movea.w explicitly.
However, this will end up with BIG diff...

Thanks ryo@ and isaki@ for comments offlist.

To generate a diff of this commit:
cvs rdiff -u -r1.13 -r1.14 src/sys/arch/amiga/stand/bootblock/boot/bbstart.s

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

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