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authorWaldemar Brodkorb <wbx@openadk.org>2016-05-28 18:12:58 +0200
committerWaldemar Brodkorb <wbx@uclibc-ng.org>2016-11-04 00:03:07 +0100
commitb8fcdddcbb192fc367ff04bbd753b9deb69b09f3 (patch)
tree8febdb9d4e3d090e9273c29df9ff06116196c8e4 /libc/sysdeps/linux/nios2/fpu_control.h
parent191739597c6d380692885cfdd8dd8aa4f31f029d (diff)
nios2: sync support with glibc
Only static linking is supported for now. More debugging and analyzing for ld.so, TLS and NPTL is required. But at least you can bootup a static root fileystem in Qemu.
Diffstat (limited to 'libc/sysdeps/linux/nios2/fpu_control.h')
-rw-r--r--libc/sysdeps/linux/nios2/fpu_control.h98
1 files changed, 0 insertions, 98 deletions
diff --git a/libc/sysdeps/linux/nios2/fpu_control.h b/libc/sysdeps/linux/nios2/fpu_control.h
deleted file mode 100644
index 4ba51b5eb..000000000
--- a/libc/sysdeps/linux/nios2/fpu_control.h
+++ /dev/null
@@ -1,98 +0,0 @@
-/* FPU control word bits. Nios2 version.
- Copyright (C) 1996, 1997, 1998, 1999, 2000 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, see
- <http://www.gnu.org/licenses/>. */
-
-#ifndef _FPU_CONTROL_H
-#define _FPU_CONTROL_H
-
-/* MIPS FPU floating point control register bits.
- *
- * 31-25 -> floating point conditions code bits 7-1. These bits are only
- * available in MIPS IV.
- * 24 -> flush denormalized results to zero instead of
- * causing unimplemented operation exception. This bit is only
- * available for MIPS III and newer.
- * 23 -> Condition bit
- * 22-18 -> reserved (read as 0, write with 0)
- * 17 -> cause bit for unimplemented operation
- * 16 -> cause bit for invalid exception
- * 15 -> cause bit for division by zero exception
- * 14 -> cause bit for overflow exception
- * 13 -> cause bit for underflow exception
- * 12 -> cause bit for inexact exception
- * 11 -> enable exception for invalid exception
- * 10 -> enable exception for division by zero exception
- * 9 -> enable exception for overflow exception
- * 8 -> enable exception for underflow exception
- * 7 -> enable exception for inexact exception
- * 6 -> flag invalid exception
- * 5 -> flag division by zero exception
- * 4 -> flag overflow exception
- * 3 -> flag underflow exception
- * 2 -> flag inexact exception
- * 1-0 -> rounding control
- *
- *
- * Rounding Control:
- * 00 - rounding to nearest (RN)
- * 01 - rounding toward zero (RZ)
- * 10 - rounding (up) toward plus infinity (RP)
- * 11 - rounding (down)toward minus infinity (RM)
- */
-
-#include <features.h>
-
-/* masking of interrupts */
-#define _FPU_MASK_V 0x0800 /* Invalid operation */
-#define _FPU_MASK_Z 0x0400 /* Division by zero */
-#define _FPU_MASK_O 0x0200 /* Overflow */
-#define _FPU_MASK_U 0x0100 /* Underflow */
-#define _FPU_MASK_I 0x0080 /* Inexact operation */
-
-/* flush denormalized numbers to zero */
-#define _FPU_FLUSH_TZ 0x1000000
-
-/* rounding control */
-#define _FPU_RC_NEAREST 0x0 /* RECOMMENDED */
-#define _FPU_RC_ZERO 0x1
-#define _FPU_RC_UP 0x2
-#define _FPU_RC_DOWN 0x3
-
-#define _FPU_RESERVED 0xfe3c0000 /* Reserved bits in cw */
-
-
-/* The fdlibm code requires strict IEEE double precision arithmetic,
- and no interrupts for exceptions, rounding to nearest. */
-
-#define _FPU_DEFAULT 0x00000000
-
-/* IEEE: same as above, but exceptions */
-#define _FPU_IEEE 0x00000F80
-
-/* 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__ ("cfc1 %0,$31" : "=r" (cw))
-#define _FPU_SETCW(cw) __asm__ ("ctc1 %0,$31" : : "r" (cw))
-
-#if 0
-/* Default control word set at startup. */
-extern fpu_control_t __fpu_control;
-#endif
-
-#endif /* fpu_control.h */