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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/x86/math-emu/exception.h
Initial import
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diff --git a/arch/x86/math-emu/exception.h b/arch/x86/math-emu/exception.h
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+/*---------------------------------------------------------------------------+
+ | 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_ */