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authorKaz Kojima <kkojima@rr.iij4u.or.jp>2014-01-23 14:22:58 +0900
committerKaz Kojima <kkojima@rr.iij4u.or.jp>2014-01-23 14:22:58 +0900
commit7007c661ad737b3c8fd7855791cd52bcac6d7a0b (patch)
treeb4ade3f72c475258c8c82b10b07e13808abd1820 /sysdeps/sh/fpu_control.h
parent0f0c35e46e9a12459a5ca64be46b6e73aa8d19d7 (diff)
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Adjust SH specific fpu_control.h and ucontext.h files.
Diffstat (limited to 'sysdeps/sh/fpu_control.h')
-rw-r--r--sysdeps/sh/fpu_control.h76
1 files changed, 76 insertions, 0 deletions
diff --git a/sysdeps/sh/fpu_control.h b/sysdeps/sh/fpu_control.h
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+++ b/sysdeps/sh/fpu_control.h
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+/* FPU control word definitions. SH version.
+ Copyright (C) 1999-2014 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
+
+#if !defined(__SH_FPU_ANY__)
+
+#define _FPU_RESERVED 0xffffffff
+#define _FPU_DEFAULT 0x00000000
+typedef unsigned int fpu_control_t;
+#define _FPU_GETCW(cw) (cw) = 0
+#define _FPU_SETCW(cw) (void) (cw)
+extern fpu_control_t __fpu_control;
+
+#else
+
+#include <features.h>
+
+/* masking of interrupts */
+#define _FPU_MASK_VM 0x0800 /* Invalid operation */
+#define _FPU_MASK_ZM 0x0400 /* Division by zero */
+#define _FPU_MASK_OM 0x0200 /* Overflow */
+#define _FPU_MASK_UM 0x0100 /* Underflow */
+#define _FPU_MASK_IM 0x0080 /* Inexact operation */
+
+/* rounding control */
+#define _FPU_RC_NEAREST 0x0 /* RECOMMENDED */
+#define _FPU_RC_ZERO 0x1
+
+#define _FPU_RESERVED 0xffc00000 /* These bits are reserved. */
+
+/* The fdlibm code requires strict IEEE double precision arithmetic,
+ and no interrupts for exceptions, rounding to nearest. */
+#define _FPU_DEFAULT 0x00080000 /* Default value. */
+#define _FPU_IEEE 0x00080f80 /* Default + exceptions enabled. */
+
+/* Type of the control word. */
+typedef unsigned int fpu_control_t;
+
+/* Macros for accessing the hardware control word. */
+#define _FPU_GETCW(cw) __asm__ ("sts fpscr,%0" : "=r" (cw))
+
+#if defined __GNUC__
+__BEGIN_DECLS
+
+/* GCC provides this function. */
+extern void __set_fpscr (unsigned long);
+#define _FPU_SETCW(cw) __set_fpscr ((cw))
+#else
+#define _FPU_SETCW(cw) __asm__ ("lds %0,fpscr" : : "r" (cw))
+#endif
+
+/* Default control word set at startup. */
+extern fpu_control_t __fpu_control;
+
+__END_DECLS
+
+#endif /* __SH_FPU_ANY__ */
+
+#endif /* _FPU_CONTROL_H */