78a76e3628
Make a memmove entry point just before bcopy and have it swap its args before continuing into the body of bcopy. Adjust the returns to return dst (original %o0 swapped to %o1) from both entry points. bcopy users will ignore them. Since these are in the branch delay slot, it should take no additional time. I use %o6 for this rather than just move %o1 back to %o2 at the end since my sparc64 assembler knowledge is weak. Also eliminate wrapper call from memmove to bcopy. Differential Revision: https://reviews.freebsd.org/D15374
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