diff options
Diffstat (limited to 'libc/sysdeps/linux/sh')
| -rw-r--r-- | libc/sysdeps/linux/sh/Makefile | 1 | ||||
| -rw-r--r-- | libc/sysdeps/linux/sh/fpu_control.h | 56 |
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 */ |