summaryrefslogtreecommitdiff
path: root/arch/i386/math-emu/exception.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/i386/math-emu/exception.h')
-rw-r--r--arch/i386/math-emu/exception.h53
1 files changed, 53 insertions, 0 deletions
diff --git a/arch/i386/math-emu/exception.h b/arch/i386/math-emu/exception.h
new file mode 100644
index 000000000000..b463f21a811e
--- /dev/null
+++ b/arch/i386/math-emu/exception.h
@@ -0,0 +1,53 @@
+/*---------------------------------------------------------------------------+
+ | exception.h |
+ | |
+ | Copyright (C) 1992 W. Metzenthen, 22 Parker St, Ormond, Vic 3163, |
+ | Australia. E-mail billm@vaxc.cc.monash.edu.au |
+ | |
+ +---------------------------------------------------------------------------*/
+
+#ifndef _EXCEPTION_H_
+#define _EXCEPTION_H_
+
+
+#ifdef __ASSEMBLY__
+#define Const_(x) $##x
+#else
+#define Const_(x) x
+#endif
+
+#ifndef SW_C1
+#include "fpu_emu.h"
+#endif /* SW_C1 */
+
+#define FPU_BUSY Const_(0x8000) /* FPU busy bit (8087 compatibility) */
+#define EX_ErrorSummary Const_(0x0080) /* Error summary status */
+/* Special exceptions: */
+#define EX_INTERNAL Const_(0x8000) /* Internal error in wm-FPU-emu */
+#define EX_StackOver Const_(0x0041|SW_C1) /* stack overflow */
+#define EX_StackUnder Const_(0x0041) /* stack underflow */
+/* Exception flags: */
+#define EX_Precision Const_(0x0020) /* loss of precision */
+#define EX_Underflow Const_(0x0010) /* underflow */
+#define EX_Overflow Const_(0x0008) /* overflow */
+#define EX_ZeroDiv Const_(0x0004) /* divide by zero */
+#define EX_Denormal Const_(0x0002) /* denormalized operand */
+#define EX_Invalid Const_(0x0001) /* invalid operation */
+
+
+#define PRECISION_LOST_UP Const_((EX_Precision | SW_C1))
+#define PRECISION_LOST_DOWN Const_(EX_Precision)
+
+
+#ifndef __ASSEMBLY__
+
+#ifdef DEBUG
+#define EXCEPTION(x) { printk("exception in %s at line %d\n", \
+ __FILE__, __LINE__); FPU_exception(x); }
+#else
+#define EXCEPTION(x) FPU_exception(x)
+#endif
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _EXCEPTION_H_ */