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1 files changed, 108 insertions, 0 deletions

diff --git a/i386/include/mach/i386/fp_reg.h b/i386/include/mach/i386/fp_reg.h
new file mode 100644
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+++ b/i386/include/mach/i386/fp_reg.h
@@ -0,0 +1,108 @@
+/* 
+ * Mach Operating System
+ * Copyright (c) 1992-1989 Carnegie Mellon University
+ * All Rights Reserved.
+ * 
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ * 
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ * 
+ * Carnegie Mellon requests users of this software to return to
+ * 
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ * 
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+
+#ifndef	_MACH_I386_FP_REG_H_
+#define	_MACH_I386_FP_REG_H_
+/*
+ *	Floating point registers and status, as saved
+ *	and restored by FP save/restore instructions.
+ */
+struct i386_fp_save	{
+	unsigned short	fp_control;	/* control */
+	unsigned short	fp_unused_1;
+	unsigned short	fp_status;	/* status */
+	unsigned short	fp_unused_2;
+	unsigned short	fp_tag;		/* register tags */
+	unsigned short	fp_unused_3;
+	unsigned int	fp_eip;		/* eip at failed instruction */
+	unsigned short	fp_cs;		/* cs at failed instruction */
+	unsigned short	fp_opcode;	/* opcode of failed instruction */
+	unsigned int	fp_dp;		/* data address */
+	unsigned short	fp_ds;		/* data segment */
+	unsigned short	fp_unused_4;
+};
+
+struct i386_fp_regs {
+	unsigned short	fp_reg_word[5][8];
+					/* space for 8 80-bit FP registers */
+};
+
+/*
+ * Control register
+ */
+#define	FPC_IE		0x0001		/* enable invalid operation
+					   exception */
+#define FPC_IM		FPC_IE
+#define	FPC_DE		0x0002		/* enable denormalized operation
+					   exception */
+#define FPC_DM		FPC_DE
+#define	FPC_ZE		0x0004		/* enable zero-divide exception */
+#define FPC_ZM		FPC_ZE
+#define	FPC_OE		0x0008		/* enable overflow exception */
+#define FPC_OM		FPC_OE
+#define	FPC_UE		0x0010		/* enable underflow exception */
+#define	FPC_PE		0x0020		/* enable precision exception */
+#define	FPC_PC		0x0300		/* precision control: */
+#define	FPC_PC_24	0x0000			/* 24 bits */
+#define	FPC_PC_53	0x0200			/* 53 bits */
+#define	FPC_PC_64	0x0300			/* 64 bits */
+#define	FPC_RC		0x0c00		/* rounding control: */
+#define	FPC_RC_RN	0x0000			/* round to nearest or even */
+#define	FPC_RC_RD	0x0400			/* round down */
+#define	FPC_RC_RU	0x0800			/* round up */
+#define	FPC_RC_CHOP	0x0c00			/* chop */
+#define	FPC_IC		0x1000		/* infinity control (obsolete) */
+#define	FPC_IC_PROJ	0x0000			/* projective infinity */
+#define	FPC_IC_AFF	0x1000			/* affine infinity (std) */
+
+/*
+ * Status register
+ */
+#define	FPS_IE		0x0001		/* invalid operation */
+#define	FPS_DE		0x0002		/* denormalized operand */
+#define	FPS_ZE		0x0004		/* divide by zero */
+#define	FPS_OE		0x0008		/* overflow */
+#define	FPS_UE		0x0010		/* underflow */
+#define	FPS_PE		0x0020		/* precision */
+#define	FPS_SF		0x0040		/* stack flag */
+#define	FPS_ES		0x0080		/* error summary */
+#define	FPS_C0		0x0100		/* condition code bit 0 */
+#define	FPS_C1		0x0200		/* condition code bit 1 */
+#define	FPS_C2		0x0400		/* condition code bit 2 */
+#define	FPS_TOS		0x3800		/* top-of-stack pointer */
+#define	FPS_TOS_SHIFT	11
+#define	FPS_C3		0x4000		/* condition code bit 3 */
+#define	FPS_BUSY	0x8000		/* FPU busy */
+
+/*
+ * Kind of floating-point support provided by kernel.
+ */
+#define	FP_NO		0		/* no floating point */
+#define	FP_SOFT		1		/* software FP emulator */
+#define	FP_287		2		/* 80287 */
+#define	FP_387		3		/* 80387 or 80486 */
+
+#endif	/* _MACH_I386_FP_REG_H_ */