Remove some math_private.h libc_feholdexcept_setround overrides.

math_private.h headers for configurations lacking support for
floating-point exceptions and rounding modes define
libc_feholdexcept_setround to override the default version with one
that discards its rounding mode argument.

Unlike other such libc_fe* macros that I removed, this one is actually
used for such configurations (in dbl-64/e_sqrt.c).  However, this does
not make the macro required.  It's only used for such configurations
with FE_TONEAREST as the rounding mode (anything needing another mode
should not be used when that mode is unavailable), and the default
definition just calls __feholdexcept and __fesetround.  Since we now
have suitable inline do-nothing definitions of __feholdexcept and
__fesetround for the cases of no exceptions and rounding modes, we can
just rely on those inlines to achieve the same optimization as this
macro definition.  Thus, this patch removes those macro definitions
(and the math_private.h headers containing them, when no longer needed
after that removal).

Tested with build-many-glibcs.py that installed stripped shared
libraries are unchanged by the patch.

	* sysdeps/m68k/coldfire/fpu/math_private.h: Move to ....
	* sysdeps/m68k/coldfire/math_private.h: ... here.
	* sysdeps/m68k/coldfire/nofpu/math_private.h: Remove file.
	* sysdeps/tile/math_private.h: Likewise.
	* sysdeps/microblaze/math_private.h (libc_feholdexcept_setround):
	Remove macro.
	* sysdeps/nios2/math_private.h (libc_feholdexcept_setround):
	Likewise.

1 files changed, 0 insertions, 20 deletions

diff --git a/sysdeps/microblaze/math_private.h b/sysdeps/microblaze/math_private.h
index 1d70d05b81..64dc18133f 100644
--- a/sysdeps/microblaze/math_private.h
+++ b/sysdeps/microblaze/math_private.h
@@ -1,26 +1,6 @@
 #ifndef MICROBLAZE_MATH_PRIVATE_H
 #define MICROBLAZE_MATH_PRIVATE_H 1
 
-/* Suppress use of exceptions here to avoid build errors if the FE_*
-   macros aren't definied. Only allow rounding modes implemented for
-   MicroBlaze.
-
-   This does mean that some code will silently fail to report exceptions,
-   set rounding mode as expected, etc., but it allows math code to compile
-   that otherwise wouldn't (such as math/s_fma.c) and so is valuable.
-
-   We intentionally ignore the "exception" arguments of functions that
-   take an exception, since we can't even evaluate the argument
-   without causing a build failure.  The extra level of statement
-   expression wrapping avoids "statement with no effect" warnings.
-   Since the callers don't check for errors anyway, we just claim
-   success in every case.
-
-   The overrides for libc_ functions must happen before we include
-   the generic math_private.h.  */
-
-#define libc_feholdexcept_setround(env, exc)   ({ (void) (env); 0; })
-
 /* Enable __finitel, __isinfl, and __isnanl for binary compatibility
    when built without long double support. */
 #define LDBL_CLASSIFY_COMPAT 1