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/*
* 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[8][5];
/* space for 8 80-bit FP registers */
};
struct i386_xfp_save {
unsigned short fp_control; /* control */
unsigned short fp_status; /* status */
unsigned short fp_tag; /* register tags */
unsigned short fp_opcode; /* opcode of failed instruction */
unsigned int fp_eip; /* eip at failed instruction */
unsigned short fp_cs; /* cs at failed instruction */
unsigned short fp_unused_1;
unsigned int fp_dp; /* data address */
unsigned short fp_ds; /* data segment */
unsigned short fp_unused_2;
unsigned int fp_mxcsr; /* MXCSR */
unsigned int fp_mxcsr_mask; /* MXCSR_MASK */
unsigned char fp_reg_word[8][16];
/* space for 8 128-bit FP registers */
unsigned char fp_xreg_word[8][16];
/* space for 8 128-bit XMM registers */
unsigned int padding[56];
} __attribute__((aligned(16)));
/*
* 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 */
#define FP_387X 4 /* FXSAVE/RSTOR-capable */
#endif /* _MACH_I386_FP_REG_H_ */
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