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Re: [ANNOUNCEMENT] TEST RELEASE: Cygwin 2.11.0-0.1




On 2018-08-13 23:29, Houder wrote:
On 2018-08-10 14:43, Houder wrote:
On Fri, 10 Aug 2018 13:42:54, Corinna Vinschen wrote:
[snip]

> Note: the following line must be changed in STC-FENV.c (the STC that was
> attached to the bug report -- the last one above).
>
> from:
> const int xxx =3D 0x3d; // FE_ALL_EXCEPT on Linux, i.e. the denormal-...
>                         // exception is excluded on Linux
>
> to:
> const int xxx =3D 0x3f; // Cygwin allows the denormal-operand exception;
>                         // Linux (Andreas Jaeger) does not.
>                         // This exception is not defined by the IEEE 754
>                         // standard (Floating-Point Arithmetic)

Shall we change that?  A patch would be nice. ;)

That is possible ...

As on Linux, the denormal-operand exception will always be masked after this
change ... (both in the default env. and in the "nomask" env.)

Meaning that, after this change, this exception can * no longer * be enabled
through the API of fenv.h

Objections? Anyone?

The modication would require changing:

winsup/cygwin/fenv.cc (_feinitialise() )
winsup/cygwin/include/fenv.h (FE_ALL_EXCEPT)

GRRR! The file encoding of fenv.h is "cp1252" because of 2 characters in this
line:

     Intel® 64 and IA-32 Architectures Software Developer’s Manuals:

... part of a comment at the beginning of the file.

(the registered trademark sign (u00ae) is encoded as 0xae (cp1252), while it
 would be: 0xc2 0xae, in utf-8,
the right single quotation mark (u2019) is encoded as 0x92 (cp1252), but in
 utf-8 it would be: 0xc2 0x80 0x98)

s/ 0xc2 0x80 0x98 / 0xe2 0x80 0x99 /

Sorry!

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