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Re: [PATCH v2] Add i386 and x86_64 fenv support from Cygwin.
- From: Brian Inglis <Brian dot Inglis at SystematicSw dot ab dot ca>
- To: newlib at sourceware dot org
- Date: Fri, 6 Sep 2019 22:58:37 -0600
- Subject: Re: [PATCH v2] Add i386 and x86_64 fenv support from Cygwin.
- References: <1567526540-23624-1-git-send-email-joel@rtems.org>
- Reply-to: Brian dot Inglis at SystematicSw dot ab dot ca
On 2019-09-03 10:02, joel@rtems.org wrote:
> From: Joel Sherrill <joel@rtems.org>
> newlib/libc/machine/i386/sys/fenv.h | 1 +
> newlib/libc/machine/x86_64/sys/fenv.h | 170 ++++++++++++
> create mode 120000 newlib/libc/machine/i386/sys/fenv.h
> create mode 100644 newlib/libc/machine/x86_64/sys/fenv.h
> --- /dev/null
> +++ b/newlib/libc/machine/x86_64/sys/fenv.h
> +/* Primary sources:
> +
> + The Open Group Base Specifications Issue 6:
> + http://www.opengroup.org/onlinepubs/000095399/basedefs/fenv.h.html
> +
> + C99 Language spec (draft n1256):
> + <url unknown>
http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1256.pdf (2007)
> +
> + Intel(R) 64 and IA-32 Architectures Software Developer's Manuals:
> + http://www.intel.com/products/processor/manuals/
> +
> + GNU C library manual pages:
> + http://www.gnu.org/software/libc/manual/html_node/Control-Functions.html
> + http://www.gnu.org/software/libc/manual/html_node/Rounding.html
> + http://www.gnu.org/software/libc/manual/html_node/FP-Exceptions.html
> + http://www.gnu.org/software/libc/manual/html_node/Status-bit-operations.html
> +
> + Linux online man page(s):
> + http://linux.die.net/man/3/fegetexcept
> +
> + The documentation quotes these sources for reference. All definitions and
> + code have been developed solely based on the information from these specs.
> +
> +*/
Shouldn't this header info also appear in i386/sys/fenv.h?
Draft standards are mentioned in the catalogue:
http://www.open-std.org/jtc1/sc22/wg14/www/wg14_document_log.htm
but you have to check PDFs are unlocked - some recent drafts are locked.
Not sure why you mention C99, newer standards are available:
C2011 http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1570.pdf (2011)
C2017
https://web.archive.org/web/20181230041359if_/http://www.open-std.org/jtc1/sc22/wg14/www/abq/c17_updated_proposed_fdis.pdf
(2017)
C202X http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2385.pdf (2019)
--
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada
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