Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 44 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/tile/math_private.h b/REORG.TODO/sysdeps/tile/math_private.h
new file mode 100644
index 0000000000..99daec4093
--- /dev/null
+++ b/REORG.TODO/sysdeps/tile/math_private.h
@@ -0,0 +1,44 @@
+#ifndef TILE_MATH_PRIVATE_H
+#define TILE_MATH_PRIVATE_H 1
+
+/* 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>
+
+#define feraiseexcept(excepts)			({ 0; })
+#define __feraiseexcept(excepts)		({ 0; })
+#define feclearexcept(exc)			({ 0; })
+#define fetestexcept(exc)			({ 0; })
+extern inline int fegetenv (fenv_t *__e)	{ return 0; }
+extern inline int __fegetenv (fenv_t *__e)	{ return 0; }
+extern inline int fesetenv (const fenv_t *__e)	{ return 0; }
+extern inline int __fesetenv (const fenv_t *__e)	{ return 0; }
+extern inline int feupdateenv (const fenv_t *__e) { return 0; }
+extern inline int __feupdateenv (const fenv_t *__e) { return 0; }
+extern inline int fegetround (void)		{ return FE_TONEAREST; }
+extern inline int __fegetround (void)		{ return FE_TONEAREST; }
+extern inline int fesetround (int __d)		{ return 0; }
+extern inline int __fesetround (int __d)	{ return 0; }
+
+#endif