1 files changed, 57 insertions, 0 deletions
diff --git a/sysdeps/powerpc/fenv_libc.h b/sysdeps/powerpc/fenv_libc.h
new file mode 100644
index 0000000000..45d61e1565
--- /dev/null
+++ b/sysdeps/powerpc/fenv_libc.h
@@ -0,0 +1,57 @@
+/* Internal libc stuff for floating point environment routines.
+   Copyright (C) 1997 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef _FENV_LIBC_H
+#define _FENV_LIBC_H	1
+
+#include <fenv.h>
+
+/* Transform a logical or of the FE_* bits to a bit pattern for the
+   appropriate sticky bits in the FPSCR.  */
+#define FE_to_sticky(excepts) \
+        (-(excepts & FE_INVALID) & FE_ALL_INVALID \
+	 |  (excepts) & (FE_ALL_EXCEPT & ~FE_INVALID  | FE_ALL_INVALID))
+
+/* The sticky bits in the FPSCR indicating exceptions have occurred.  */
+#define FPSCR_STICKY_BITS ((FE_ALL_EXCEPT | FE_ALL_INVALID) & ~FE_INVALID)
+
+/* Equivalent to fegetenv, but returns a fenv_t instead of taking a
+   pointer.  */
+#define fegetenv_register() \
+        ({ fenv_t env; asm ("mffs %0" : "=f" (env)); env; })
+
+/* Equivalent to fesetenv, but takes a fenv_t instead of a pointer.  */
+#define fesetenv_register(env) \
+        ({ double d = (env); asm ("mtfsf 0xff,%0" : : "f" (d)); })
+
+/* This very handy macro:
+   - Sets the rounding mode to 'round to nearest';
+   - Sets the processor into IEEE mode; and
+   - Prevents exceptions from being raised for inexact results.
+   These things happen to be exactly what you need for typical elementary
+   functions.  */
+#define relax_fenv_state() asm ("mtfsfi 7,0")
+
+typedef union
+{
+  fenv_t fenv;
+  unsigned int l[2];
+} fenv_union_t;
+
+#endif /* fenv_libc.h */