Fix {x,}chacha_{armv6,neon} to follow arm calling convention #11
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xchacha_{armv6,neon} corrupts callee-saved register r7.
{x,}chacha_{armv6,neon} (temporarily) stores data below %sp,
then moves %sp down and expect data to be intact.
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xchacha_{armv6,neon} corrupts callee-saved register r7.
{x,}chacha_{armv6,neon} (temporarily) stores data below %sp,
then moves %sp down and expect data to be intact.
I believe this fixes #10 and #6;
Changes in chacha_armv6-32.inc and chacha_neon-32.inc are exactly same.