summaryrefslogtreecommitdiff
path: root/sysdeps/m68k/fpu_control.h
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/m68k/fpu_control.h')
-rw-r--r--sysdeps/m68k/fpu_control.h101
1 files changed, 0 insertions, 101 deletions
diff --git a/sysdeps/m68k/fpu_control.h b/sysdeps/m68k/fpu_control.h
deleted file mode 100644
index 86358e6559..0000000000
--- a/sysdeps/m68k/fpu_control.h
+++ /dev/null
@@ -1,101 +0,0 @@
-/* 68k FPU control word definitions.
- Copyright (C) 1996, 1997, 1998 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 Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; 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
-
-/*
- * Motorola floating point control register bits.
- *
- * 31-16 -> reserved (read as 0, ignored on write)
- * 15 -> enable trap for BSUN exception
- * 14 -> enable trap for SNAN exception
- * 13 -> enable trap for OPERR exception
- * 12 -> enable trap for OVFL exception
- * 11 -> enable trap for UNFL exception
- * 10 -> enable trap for DZ exception
- * 9 -> enable trap for INEX2 exception
- * 8 -> enable trap for INEX1 exception
- * 7-6 -> Precision Control
- * 5-4 -> Rounding Control
- * 3-0 -> zero (read as 0, write as 0)
- *
- *
- * Precision Control:
- * 00 - round to extended precision
- * 01 - round to single precision
- * 10 - round to double precision
- * 11 - undefined
- *
- * Rounding Control:
- * 00 - rounding to nearest (RN)
- * 01 - rounding toward zero (RZ)
- * 10 - rounding (down)toward minus infinity (RM)
- * 11 - rounding (up) toward plus infinity (RP)
- *
- * The hardware default is 0x0000. I choose 0x5400.
- */
-
-#include <features.h>
-
-/* masking of interrupts */
-#define _FPU_MASK_BSUN 0x8000
-#define _FPU_MASK_SNAN 0x4000
-#define _FPU_MASK_OPERR 0x2000
-#define _FPU_MASK_OVFL 0x1000
-#define _FPU_MASK_UNFL 0x0800
-#define _FPU_MASK_DZ 0x0400
-#define _FPU_MASK_INEX1 0x0200
-#define _FPU_MASK_INEX2 0x0100
-
-/* precision control */
-#define _FPU_EXTENDED 0x00 /* RECOMMENDED */
-#define _FPU_DOUBLE 0x80
-#define _FPU_SINGLE 0x40 /* DO NOT USE */
-
-/* rounding control */
-#define _FPU_RC_NEAREST 0x00 /* RECOMMENDED */
-#define _FPU_RC_ZERO 0x10
-#define _FPU_RC_DOWN 0x20
-#define _FPU_RC_UP 0x30
-
-#define _FPU_RESERVED 0xFFFF000F /* Reserved bits in fpucr */
-
-
-/* Now two recommended fpucr */
-
-/* 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
-
-/* IEEE: same as above, but exceptions. We must make it non-zero so
- that __setfpucw works. This bit will be ignored. */
-#define _FPU_IEEE 0x00000001
-
-/* 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) __asm__ ("fmove%.l %!, %0" : "=dm" (cw))
-#define _FPU_SETCW(cw) __asm__ volatile ("fmove%.l %0, %!" : : "dm" (cw))
-
-/* Default control word set at startup. */
-extern fpu_control_t __fpu_control;
-
-#endif /* _M68K_FPU_CONTROL_H */