2012-01-31 14:59:30 +01:00
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#ifndef _MATH_PRIVATE_H
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2012-11-05 17:36:09 +01:00
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/* Internally, we suppress any use of exception or rounding other
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than what is supported by the hardware. This does mean that some
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code will silently fail to report exceptions, set rounding mode
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as expected, etc., but it allows math code to compile that otherwise
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wouldn't (such as math/s_fma.c) and so is valuable.
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We intentionally ignore the "exception" arguments of functions that
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take an exception, since we can't even evaluate the argument
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without causing a build failure. The extra level of statement
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expression wrapping avoids "statement with no effect" warnings.
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Since the callers don't check for errors anyway, we just claim
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success in every case.
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The overrides for libc_ functions must happen before we include
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the generic math_private.h, and the overrides for regular
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<fenv.h> functions must happen afterwards, to avoid clashing with
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the declarations of those functions. */
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#define libc_fesetround(rnd) ({ 0; })
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#define libc_fetestexcept(exc) ({ 0; })
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#define libc_feholdexcept_setround(env, exc) ({ (void) (env); 0; })
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#define libc_feupdateenv_test(env, exc) ({ (void) (env); 0; })
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2012-03-10 01:28:42 +01:00
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#include_next <math_private.h>
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2012-01-31 14:59:30 +01:00
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2012-11-05 17:36:09 +01:00
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#define feraiseexcept(excepts) ({ 0; })
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Fix libm feraiseexcept namespace (bug 17723).
Various C90 and UNIX98 libm functions call feraiseexcept, which is not
in those standards. This causes linknamespace test failures - except
on x86 / x86_64, where feraiseexcept is inline (for the relevant
constant arguments) in bits/fenv.h.
This patch fixes this by making those functions call __feraiseexcept
instead. All changes are applied to all architectures rather than
considering the possibility that some might not be needed in some
cases (e.g. x86) as it seems most maintainable to keep architectures
consistent.
Where __feraiseexcept does not exist, it is added, with feraiseexcept
made a weak alias; where it is a strong alias, it is made weak.
libm_hidden_def / libm_hidden_proto are used with __feraiseexcept
(this might in some cases improve code generation for existing calls
to __feraiseexcept in some code on some architectures). Where there
are dummy feraiseexcept macros (on architectures without
floating-point exceptions support, to avoid compile errors from
references to undefined FE_* macros), corresponding dummy
__feraiseexcept macros are added. And on x86, to ensure
__feraiseexcept calls still get inlined, the inline function in
bits/fenv.h is refactored so that most of it can be reused in an
inline __feraiseexcept in a separate include/bits/fenv.h.
Calls are changed in C90/UNIX98 functions, but generally not in
functions missing from those standards. They are also changed in
libc_fe* functions (on the basis that those might be used in any libm
function), and in feupdateenv (on the same basis - may be used, via
default libc_*, in any libm function - of course feupdateenv will need
changing to __feupdateenv in a subsequent patch to make that fully
namespace-clean).
No __feraiseexcept is added corresponding to the feraiseexcept in
powerpc bits/fenvinline.h, because that macro definition is
conditional on !defined __NO_MATH_INLINES, and glibc libm is built
with -D__NO_MATH_INLINES, so changing internal calls to use
__feraiseexcept should make no difference.
Tested for x86_64 (testsuite; the only change in disassembly of
installed shared libraries is a slight code reordering in clog10, of
no apparent significance). Also tested for MIPS, where (in the
configuration tested) it eliminates math.h linknamespace failures for
n32 and n64 (some for o32 remain because of other issues).
[BZ #17723]
* include/fenv.h (__feraiseexcept): Use libm_hidden_proto.
* math/fraiseexcpt.c (__feraiseexcept): Use libm_hidden_def.
* sysdeps/aarch64/fpu/fraiseexcpt.c (feraiseexcept): Rename to
__feraiseexcept and define as weak alias of __feraiseexcept. Use
libm_hidden_weak.
* sysdeps/arm/fraiseexcpt.c (feraiseexcept): Likewise.
* sysdeps/hppa/fpu/fraiseexcpt.c (feraiseexcept): Likewise.
* sysdeps/i386/fpu/fraiseexcpt.c (__feraiseexcept): Use
libm_hidden_def.
* sysdeps/ia64/fpu/fraiseexcpt.c (feraiseexcept): Rename to
__feraiseexcept and define as weak alias of __feraiseexcept. Use
libm_hidden_weak.
* sysdeps/m68k/coldfire/fpu/fraiseexcpt.c (feraiseexcept):
Likewise.
* sysdeps/microblaze/math_private.h (__feraiseexcept): New macro.
* sysdeps/mips/fpu/fraiseexcpt.c (feraiseexcept): Rename to
__feraiseexcept and define as weak alias of __feraiseexcept. Use
libm_hidden_weak.
* sysdeps/powerpc/fpu/fraiseexcpt.c (__feraiseexcept): Use
libm_hidden_def.
* sysdeps/powerpc/nofpu/fraiseexcpt.c (__feraiseexcept): Likewise.
* sysdeps/powerpc/powerpc32/e500/nofpu/fraiseexcpt.c
(__feraiseexcept): Likewise.
* sysdeps/s390/fpu/fraiseexcpt.c (feraiseexcept): Rename to
__feraiseexcept and define as weak alias of __feraiseexcept. Use
libm_hidden_weak.
* sysdeps/sh/sh4/fpu/fraiseexcpt.c (feraiseexcept): Likewise.
* sysdeps/sparc/fpu/fraiseexcpt.c (__feraiseexcept): Use
libm_hidden_def.
* sysdeps/tile/math_private.h (__feraiseexcept): New macro.
* sysdeps/unix/sysv/linux/alpha/fraiseexcpt.S (__feraiseexcept):
Use libm_hidden_def.
* sysdeps/x86_64/fpu/fraiseexcpt.c (__feraiseexcept): Use
libm_hidden_def.
(feraiseexcept): Define as weak not strong alias. Use
libm_hidden_weak.
* sysdeps/x86/fpu/bits/fenv.h (__feraiseexcept_invalid_divbyzero):
New inline function. Factored out of ...
(feraiseexcept): ... here. Use __feraiseexcept_invalid_divbyzero.
* sysdeps/x86/fpu/include/bits/fenv.h: New file.
* math/e_scalb.c (invalid_fn): Call __feraiseexcept instead of
feraiseexcept.
* math/w_acos.c (__acos): Likewise.
* math/w_asin.c (__asin): Likewise.
* math/w_ilogb.c (__ilogb): Likewise.
* math/w_j0.c (y0): Likewise.
* math/w_j1.c (y1): Likewise.
* math/w_jn.c (yn): Likewise.
* math/w_log.c (__log): Likewise.
* math/w_log10.c (__log10): Likewise.
* sysdeps/aarch64/fpu/feupdateenv.c (feupdateenv): Likewise.
* sysdeps/aarch64/fpu/math_private.h
(libc_feupdateenv_test_aarch64): Likewise.
* sysdeps/alpha/fpu/feupdateenv.c (__feupdateenv): Likewise.
* sysdeps/arm/fenv_private.h (libc_feupdateenv_test_vfp): Likewise.
* sysdeps/arm/feupdateenv.c (feupdateenv): Likewise.
* sysdeps/ia64/fpu/feupdateenv.c (feupdateenv): Likewise.
* sysdeps/m68k/fpu/feupdateenv.c (__feupdateenv): Likewise.
* sysdeps/mips/fpu/feupdateenv.c (feupdateenv): Likewise.
* sysdeps/powerpc/fpu/e_sqrt.c (__slow_ieee754_sqrt): Likewise.
* sysdeps/s390/fpu/feupdateenv.c (feupdateenv): Likewise.
* sysdeps/sh/sh4/fpu/feupdateenv.c (feupdateenv): Likewise.
* sysdeps/sparc/fpu/feupdateenv.c (__feupdateenv): Likewise.
2014-12-30 18:08:09 +01:00
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#define __feraiseexcept(excepts) ({ 0; })
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2012-11-05 17:36:09 +01:00
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#define feclearexcept(exc) ({ 0; })
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2014-12-30 01:48:43 +01:00
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#define fetestexcept(exc) ({ 0; })
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extern inline int fegetenv (fenv_t *__e) { return 0; }
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2014-12-31 23:07:52 +01:00
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extern inline int __fegetenv (fenv_t *__e) { return 0; }
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2014-12-30 01:48:43 +01:00
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extern inline int fesetenv (const fenv_t *__e) { return 0; }
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2015-01-07 00:36:20 +01:00
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extern inline int __fesetenv (const fenv_t *__e) { return 0; }
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2014-12-30 01:48:43 +01:00
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extern inline int feupdateenv (const fenv_t *__e) { return 0; }
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2015-01-07 20:01:20 +01:00
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extern inline int __feupdateenv (const fenv_t *__e) { return 0; }
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2014-12-30 01:48:43 +01:00
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extern inline int fegetround (void) { return FE_TONEAREST; }
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2015-01-02 21:44:42 +01:00
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extern inline int __fegetround (void) { return FE_TONEAREST; }
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2014-12-30 01:48:43 +01:00
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extern inline int fesetround (int __d) { return 0; }
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2015-01-07 01:41:23 +01:00
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extern inline int __fesetround (int __d) { return 0; }
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2012-01-31 14:59:30 +01:00
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#endif
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