CVS commit: src/sys/arch/powerpc/powerpc

["Rin Okuyama" <rin%netbsd.org@localhost>]

Module Name:    src
Committed By:   rin
Date:           Thu Jun  2 00:32:14 UTC 2022

Modified Files:
        src/sys/arch/powerpc/powerpc: fix_unaligned.c

Log Message:
As a tiny optimization, rearrange cases as follows:

(1) load/store of format D (base + disp)
(2) load/store of format X (base + index)
(3) lmw and stmw

For clang-compiled userland (*), their frequencies are roughly,
(1) > (2) >> (3) ~ 0.

Improvement should be minor; we are already trapped in the alignment
fault handler.

(*) clang unconditionally emits unaligned memory access for powerpc.
    Undocumented -disable-ppc-unaligned option does not work...


To generate a diff of this commit:
cvs rdiff -u -r1.1 -r1.2 src/sys/arch/powerpc/powerpc/fix_unaligned.c

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