math_emu.h

LINUX1.0内核源代码,学习LINUX编程的一定要看。

#ifndef _LINUX_MATH_EMU_H
#define _LINUX_MATH_EMU_H

struct fpu_reg {
	char sign;
	char tag;
	long exp;
	unsigned sigl;
	unsigned sigh;
};


/* This structure matches the layout of the data saved to the stack
   following a device-not-present interrupt, part of it saved
   automatically by the 80386/80486.
   */
struct info {
	long ___orig_eip;
	long ___ret_from_system_call;
	long ___ebx;
	long ___ecx;
	long ___edx;
	long ___esi;
	long ___edi;
	long ___ebp;
	long ___eax;
	long ___ds;
	long ___es;
	long ___fs;
	long ___gs;
	long ___orig_eax;
	long ___eip;
	long ___cs;
	long ___eflags;
	long ___esp;
	long ___ss;
	long ___vm86_es; /* This and the following only in vm86 mode */
	long ___vm86_ds;
	long ___vm86_fs;
	long ___vm86_gs;
};

#endif