openbsd/src/lib/libcrypto/bn/arch/amd64, branch OPENBSD_7_7A mirror of https://github.com/libressl/openbsd.git
https://git.lua4.win/openbsd/atom?h=OPENBSD_7_72024-03-26T06:09:25+00:00Provide an optimised bn_subw() for amd64.2024-03-26T06:09:25+00:00jsing2024-03-26T06:09:25+00:00urn:sha1:76fb2cf7d456ff89c43a9f58c3b1142078060c79
bn_subw() will be used more widely in an upcoming change.
Replace uses of endbr64 with _CET_ENDBR from cet.h2024-02-24T15:30:14+00:00tb2024-02-24T15:30:14+00:00urn:sha1:c730c3b3b1845cc7c4a4aceff2031f1135faa6bb
cet.h is needed for other platforms to emit the relevant .gnu.properties
sections that are necessary for them to enable IBT. It also avoids issues
with older toolchains on macOS that explode on encountering endbr64.
based on a diff by kettenis
ok beck kettenis
Rewrite and simplify bn_sqr()/bn_sqr_normal().2023-06-24T16:01:44+00:00jsing2023-06-24T16:01:44+00:00urn:sha1:3180c8185bba7d792127e1b9bc87f11e439ba0fb
Rework bn_sqr()/bn_sqr_normal() so that it is less convoluted and more
readable. Instead of recomputing values that the caller has already
computed, pass it as an argument. Avoid branching and remove duplication
of variables. Consistently use a_len and r_len naming for lengths.
ok tb@
Add endbr64 where needed by inspection. Passes regresson tests.2023-04-25T04:42:26+00:00deraadt2023-04-25T04:42:26+00:00urn:sha1:f56bc15e44b93e564d434a7d0b5c8f837812aac3
ok jsing, and kind of tb an earlier version
Rework bn_add()/bn_sub() to operate on word arrays.2023-02-22T05:46:37+00:00jsing2023-02-22T05:46:37+00:00urn:sha1:b78cccc526d31cefe3af77cef6ddab0981e8a45b
Rather than working on BIGNUMs, change bn_add()/bn_sub() to operate on word
arrays that potentially differ in length. This matches the behaviour of
s2n-bignum's bignum_add() and bignum_sub().
ok tb@
Enable s2n-bignum word_clz() on amd64.2023-02-16T11:13:05+00:00jsing2023-02-16T11:13:05+00:00urn:sha1:02f91f3325f965a313f0cffe5053a084d05a84ea
The BN_num_bits_word() function is a hot path, being called more than
80 million times during a libcrypto regress run. The word_clz()
implementation uses five instructions to do the same as the generic code
that uses more than 60 instructions.
Discussed with tb@
Change include from _internal_s2n_bignum.h to s2n_bignum_internal.h.2023-02-16T10:54:20+00:00jsing2023-02-16T10:54:20+00:00urn:sha1:95c0ed9385b76741de79e6270c2ff6c36a289b02Include the ISC license from s2n-bignum's LICENSE file.2023-02-16T10:53:18+00:00jsing2023-02-16T10:53:18+00:00urn:sha1:d35b9335195e893a1f5798a0928ff46db9c39e43Bring in word_clz.S from s2n-bignum for amd64.2023-02-16T10:51:58+00:00jsing2023-02-16T10:51:58+00:00urn:sha1:f483fe7409c6e019825355a40d8dca761bb5d6d3Rename bn_umul_hilo() to bn_mulw().2023-02-16T10:41:03+00:00jsing2023-02-16T10:41:03+00:00urn:sha1:b11f50c06cb0a98a91ab4cbfb49715c95ee07486
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@