math_emu.h

嵌入式ARM的一些源代码

#ifndef _I386_MATH_EMU_H
#define _I386_MATH_EMU_H

#include <asm/sigcontext.h>

void restore_i387_soft(struct _fpstate *buf);
struct _fpstate * save_i387_soft(struct _fpstate * buf);

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;
};

/* Interface for converting data between the emulator format
 * and the hardware format. Used for core dumping and for
 * ptrace(2) */
void hardreg_to_softreg(const char hardreg[10],
			      struct fpu_reg *soft_reg);

void softreg_to_hardreg(const struct fpu_reg *rp, char d[10],
			long int control_word);

#endif