diff options
| -rw-r--r-- | ports/ChangeLog.tile | 3 | ||||
| -rw-r--r-- | ports/sysdeps/tile/math_private.h | 32 |
2 files changed, 28 insertions, 7 deletions
diff --git a/ports/ChangeLog.tile b/ports/ChangeLog.tile index fd722b3e84..99e95db266 100644 --- a/ports/ChangeLog.tile +++ b/ports/ChangeLog.tile @@ -1,5 +1,8 @@ 2012-11-05 Chris Metcalf <cmetcalf@tilera.com> + * sysdeps/tile/math_private.h: Provide additional no-op defines + for exception and rounding macros. + * sysdeps/tile/tilegx/Makefile: Generate Makefile fragment to determine whether to build elf-init.c and gmon-start.c with -mcmodel=large. * sysdeps/tile/crti.S: Support large memory model. diff --git a/ports/sysdeps/tile/math_private.h b/ports/sysdeps/tile/math_private.h index 858db4a051..90dcc3f866 100644 --- a/ports/sysdeps/tile/math_private.h +++ b/ports/sysdeps/tile/math_private.h @@ -1,13 +1,31 @@ #ifndef _MATH_PRIVATE_H +/* Internally, we suppress any use of exception or rounding other + than what is supported by the hardware. 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, and the overrides for regular + <fenv.h> 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; }) + #include_next <math_private.h> -/* We have no exception support, so feraiseexcept() must be a no-op. - And since we don't define FE_INVALID, FE_DIVBYZERO, etc., we - must ignore the argument of feraiseexcept() as well. we return - "1" to indicate we failed to raise an exception, though none of - the callers in glibc actually care. The extra level of statement - expression wrapping avoids "statement with no effect" warnings. */ -#define feraiseexcept(excepts) ({ 1; }) +#define feraiseexcept(excepts) ({ 0; }) +#define feclearexcept(exc) ({ 0; }) #endif |