1 files changed, 77 insertions, 0 deletions
diff --git a/sysdeps/powerpc/fpu_control.h b/sysdeps/powerpc/fpu_control.h
new file mode 100644
index 0000000000..b31e0eeefd
--- /dev/null
+++ b/sysdeps/powerpc/fpu_control.h
@@ -0,0 +1,77 @@
+/* FPU control word definitions.  PowerPC version.
+   Copyright (C) 1996, 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 _FPU_CONTROL_H
+#define _FPU_CONTROL_H
+
+/* rounding control */
+#define _FPU_RC_NEAREST 0x00   /* RECOMMENDED */
+#define _FPU_RC_DOWN    0x03
+#define _FPU_RC_UP      0x02
+#define _FPU_RC_ZERO    0x01
+
+#define _FPU_MASK_NI  0x04 /* non-ieee mode */
+
+/* masking of interrupts */
+#define _FPU_MASK_ZM  0x10 /* zero divide */
+#define _FPU_MASK_OM  0x40 /* overflow */
+#define _FPU_MASK_UM  0x20 /* underflow */
+#define _FPU_MASK_XM  0x08 /* inexact */
+#define _FPU_MASK_IM  0x80 /* invalid operation */
+#define _FPU_MASK_VXCVI 0x100 /* invalid operation for integer convert */
+#define _FPU_MASK_VXSQRT 0x200 /* invalid operation for square root */
+#define _FPU_MASK_VXSOFT 0x400 /* invalid operation raised by software */
+
+#define _FPU_RESERVED 0xfffff800 /* These bits are reserved are not changed. */
+
+/* The fdlibm code requires no interrupts for exceptions.  Don't
+   change the rounding mode, it would break long double I/O!  */
+#define _FPU_DEFAULT  0x00000000 /* Default value.  */
+
+/* IEEE:  same as above, but (some) exceptions;
+   we leave the 'inexact' exception off.
+ */
+#define _FPU_IEEE     0x000003f0
+
+/* Type of the control word.  */
+typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__SI__)));
+
+/* Macros for accessing the hardware control word.  */
+#define _FPU_GETCW(cw) ( { \
+  fpu_control_t tmp[2] __attribute__ ((__aligned__(8))); \
+  __asm__ ("mffs 0; stfd 0,%0" : "=m" (*tmp) : : "fr0"); \
+  tmp[1]; } )
+#define _FPU_SETCW(cw) { \
+  fpu_control_t tmp[2] __attribute__ ((__aligned__(8))); \
+  tmp[0] = 0xFFF80000; /* arbitrary, more-or-less */ \
+  tmp[1] = cw; \
+  __asm__ ("lfd 0,%0; mtfsf 255,0" : : "m" (*tmp) : "fr0"); \
+}
+
+/* Default control word set at startup.  */
+extern fpu_control_t __fpu_control;
+
+__BEGIN_DECLS
+
+/* Called at startup.  It can be used to manipulate fpu control register.  */
+extern void __setfpucw __P ((fpu_control_t));
+
+__END_DECLS
+
+#endif /* _FPU_CONTROL_H */