Changeset 11894:be1b22d0c36a

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x86, ext: fix buf overflow in fp80 ops; pad fp80_t in fputils
the compiler seems to align the fp80_t data struct, so here we add

explicit padding to avoid confusion.
storeFloat80() will try to write all 16B of the fp80_t to the bits[] array

of the calling instruction. this happens because storeFloat80() points its

local fp80_t* to the memory the caller allocated for bits[], which is only

10B, thus we get an overflow that is flagged by clang's asan. here we

get the fp80 value first, the memcpy() the bits[] of fp80_t to the mem

allocated by the caller.
some of the x86 FP ops also use char to represent 8b types, while the fp80

struct uses uint8_t, so here we make the x86 ops use uint8_t as well.