Al Viro daf52375c1 amd64: switch csum_partial_copy_generic() to new calling conventions ...

... and fold handling of misaligned case into it.

Implementation note: we stash the "will we need to rol8 the sum in the end"
flag into the MSB of %rcx (the lower 32 bits are used for length); the rest
is pretty straightforward.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

2020-08-20 15:45:22 -04:00

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