From d4c7e1d0fdd1b1ff97606f2368b6cdeb7c915734 Mon Sep 17 00:00:00 2001 From: Joseph Myers Date: Wed, 24 Jan 2018 23:33:03 +0000 Subject: Add no-FPU ColdFire math_private.h. As with some other soft-float configurations, no-FPU ColdFire needs various fenv.h functions and glibc-internal macros overridden in math_private.h to avoid references to undefined FE_* macros when building glibc. This patch adds a suitable math_private.h, based on the MicroBlaze one (Nios II and Tile also have similar files). There's a case for having such a file in sysdeps/ieee754/soft-fp so this logic is applied more generally to configurations without exceptions and rounding modes, even when the relevant macros are defined in fenv.h - the only case where that might be inappropriate is ARM soft-float (where the fenv.h functions might or might not work at runtime, depending on whether the processor used at runtime supports VFP). There's also a case that soft-float configurations (on processors with both hard-float and soft-float) should more consistently avoid defining FE_* macros in bits/fenv.h when not actually supported. But both of those are separate potential cleanups. This allows the no-FPU ColdFire build to get further (another fix is needed to allow the build to complete). * sysdeps/m68k/coldfire/nofpu/math_private.h: New file. Based on MicroBlaze file. --- sysdeps/m68k/coldfire/nofpu/math_private.h | 52 ++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 sysdeps/m68k/coldfire/nofpu/math_private.h (limited to 'sysdeps/m68k') diff --git a/sysdeps/m68k/coldfire/nofpu/math_private.h b/sysdeps/m68k/coldfire/nofpu/math_private.h new file mode 100644 index 0000000..879577b --- /dev/null +++ b/sysdeps/m68k/coldfire/nofpu/math_private.h @@ -0,0 +1,52 @@ +/* Disable use of exceptions and rounding modes for no-FPU ColdFire. + Copyright (C) 2012-2018 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + . */ + +#ifndef COLDFIRE_NOFPU_MATH_PRIVATE_H +#define COLDFIRE_NOFPU_MATH_PRIVATE_H 1 + +/* Suppress use of exceptions and rounding modes here to avoid build + errors if the FE_* macros aren't defined. + + 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, and the overrides for regular + functions must happen afterwards, to avoid clashing with + the declarations of those functions. */ + +#define libc_fesetround(rnd) ({ 0; }) +#define libc_fetestexcept(exc) ({ 0; }) +#define libc_feholdexcept_setround(env, exc) ({ (void) (env); 0; }) +#define libc_feupdateenv_test(env, exc) ({ (void) (env); 0; }) + +/* Enable __finitel, __isinfl, and __isnanl for binary compatibility + when built without long double support. */ +#define LDBL_CLASSIFY_COMPAT 1 + +#include_next + +#define feraiseexcept(excepts) ({ 0; }) +#define __feraiseexcept(excepts) ({ 0; }) +#define feclearexcept(exc) ({ 0; }) + +#endif -- cgit v1.1