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-rw-r--r--libc/sysdeps/linux/sh/Makefile1
-rw-r--r--libc/sysdeps/linux/sh/fpu_control.h56
2 files changed, 57 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/sh/Makefile b/libc/sysdeps/linux/sh/Makefile
index 758d4462d..b4266c9f5 100644
--- a/libc/sysdeps/linux/sh/Makefile
+++ b/libc/sysdeps/linux/sh/Makefile
@@ -64,6 +64,7 @@ gcrt1.o: $(CRT0_DEPS)
endif
headers:
+ cd $(TOPDIR)/include && ln -fs ../libc/sysdeps/linux/sh/fpu_control.h .
clean:
rm -f *.[oa] *~ core
diff --git a/libc/sysdeps/linux/sh/fpu_control.h b/libc/sysdeps/linux/sh/fpu_control.h
new file mode 100644
index 000000000..43eb9e549
--- /dev/null
+++ b/libc/sysdeps/linux/sh/fpu_control.h
@@ -0,0 +1,56 @@
+/* FPU control word definitions. SH version.
+ Copyright (C) 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, 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
+
+/* 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__
+#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;
+
+#endif /* _FPU_CONTROL_H */