Signed-off-by: Nzhao_zhen_zhou <zhaozhenzhou@huawei.com>

Reviewed-by: NPaul Yang <kaishen.yy@antfin.com>
(Merged from https://github.com/openssl/openssl/pull/11344)

If one of the perlasm xlate drivers crashes, OpenSSL's build will
currently swallow the error and silently truncate the output to however
far the driver got. This will hopefully fail to build, but better to
check such things.

Handle this by checking for errors when closing STDOUT (which is a pipe
to the xlate driver).

This is the OpenSSL 1.1.1 version of
https://github.com/openssl/openssl/pull/10883 and
https://github.com/openssl/openssl/pull/10930.
Reviewed-by: NMark J. Cox <mark@awe.com>
Reviewed-by: NPaul Dale David Benjamin <davidben@google.com>
(Merged from https://github.com/openssl/openssl/pull/10931)

Reviewed-by: NRichard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6371)

Montgomery multiplication post-conditions in some of code paths were
formally non-constant time. Cache access pattern was result-neutral,
but a little bit asymmetric, which might have produced a signal [if
processor reordered load and stores at run-time].
Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6141)

Names were not removed.
Some comments were updated.
Replace Andy's address with openssl.org
Reviewed-by: NAndy Polyakov <appro@openssl.org>
Reviewed-by: NPaul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/4516)

Reviewed-by: NRichard Levitte <levitte@openssl.org>

This gets rid of the BEGINRAW..ENDRAW sections in crypto/bn/build.info.

This also moves the assembler generating perl scripts to take the
output file name as last command line argument, where necessary.
Reviewed-by: NRich Salz <rsalz@openssl.org>

Improve RSA sing performance by 20-30% by:
- switching from floating-point to integer conditional moves;
- daisy-chaining sqr-sqr-sqr-sqr-sqr-mul sequences;
- using MONTMUL even during powers table setup;

Submitted by: David Miller, Andy Polyakov