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bn_sqr_words() does not actually compute the square of the words, it only
computes the square of each individual word - rename it to reflect reality.
Discussed with tb@
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Most bn_.*_words() functions operate on two word arrays, however
bn_mul_words() and bn_mul_add_words() operate on one word array and
multiply by a single word. Rename these to bn_mulw_words() and
bn_mulw_add_words() to reflect this, following naming scheme that we use
for primitives.
This frees up bn_mul_words() to actually be used for multiplying two word
arrays. Rename bn_mul_normal() to bn_mul_words(), which will then become
one of the possible assembly integration points.
ok tb@
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This keeps the naming consistent with the other bignum primitives that have
been recently introduced. Also, use 1/0 intead of h/l (e.g. a1 instead of
ah), as this keeps consistency with other primitives and allows for naming
that works with double word, triple word and quadruple word inputs/outputs.
Discussed with tb@
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ok tb@
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Provide a function that divides a double word (h:l) by d, returning the
quotient q and the remainder r, such that q * d + r is equal to the
numerator. Call this from the three places that currently implement this
themselves.
This is implemented with some slight indirection, which allows for per
architecture implementations, replacing the define/macro tangle, which
messes with variables that are not passed to it.
Also remove a duplicate of bn_div_words() for the BN_ULLONG && BN_DIV2W
case - this is already handled.
ok tb@
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These are wrapped with #ifndef HAVE_BN_ADD_MUL_WORDS/HAVE_BN_MUL_WORDS,
which are defined for architectures that provide their own assembly
versions.
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This is wrapped with #ifndef HAVE_BN_SQR_WORDS, which is then defined for
architectures that provide their own assembly versions.
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This is wrapped with #ifndef HAVE_BN_DIV_WORDS, which are defined for
architectures that provide their own assembly versions.
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These are wrapped with #ifndef HAVE_BN_ADD_WORDS/HAVE_BN_SUB_WORDS, which
are defined for architectures that provide their own assembly versions.
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Wrap these in HAVE_BN_{MUL,SQR}_COMBA{4,8} defines. Add these defines to
bn_arch.h where the architecture currently provides its own version.
ok tb@
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This will provide a location for machine specific defines, prototypes and
inline functions.
ok tb@
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