/* * linux/include/linux/math_emu.h * * (C) 1991 Linus Torvalds */#ifndef _LINUX_MATH_EMU_H#define _LINUX_MATH_EMU_H#include <linux/sched.h>struct info {	long ___math_ret;	long ___orig_eip;	long ___edi;	long ___esi;	long ___ebp;	long ___sys_call_ret;	long ___eax;	long ___ebx;	long ___ecx;	long ___edx;	long ___orig_eax;	long ___fs;	long ___es;	long ___ds;	long ___eip;	long ___cs;	long ___eflags;	long ___esp;	long ___ss;};#define EAX (info->___eax)#define EBX (info->___ebx)#define ECX (info->___ecx)#define EDX (info->___edx)#define ESI (info->___esi)#define EDI (info->___edi)#define EBP (info->___ebp)#define ESP (info->___esp)#define EIP (info->___eip)#define ORIG_EIP (info->___orig_eip)#define EFLAGS (info->___eflags)#define DS (*(unsigned short *) &(info->___ds))#define ES (*(unsigned short *) &(info->___es))#define FS (*(unsigned short *) &(info->___fs))#define CS (*(unsigned short *) &(info->___cs))#define SS (*(unsigned short *) &(info->___ss))void __math_abort(struct info *, unsigned int);#define math_abort(x,y) \(((volatile void (*)(struct info *,unsigned int)) __math_abort)((x),(y)))/* * Gcc forces this stupid alignment problem: I want to use only two longs * for the temporary real 64-bit mantissa, but then gcc aligns out the * structure to 12 bytes which breaks things in math_emulate.c. Shit. I * want some kind of "no-alignt" pragma or something. */typedef struct {	long a,b;	short exponent;} temp_real;typedef struct {	short m0,m1,m2,m3;	short exponent;} temp_real_unaligned;#define real_to_real(a,b) \((*(long long *) (b) = *(long long *) (a)),((b)->exponent = (a)->exponent))typedef struct {	long a,b;} long_real;typedef long short_real;typedef struct {	long a,b;	short sign;} temp_int;struct swd {	int ie:1;	int de:1;	int ze:1;	int oe:1;	int ue:1;	int pe:1;	int sf:1;	int ir:1;	int c0:1;	int c1:1;	int c2:1;	int top:3;	int c3:1;	int b:1;};#define I387 (current->tss.i387)#define SWD (*(struct swd *) &I387.swd)#define ROUNDING ((I387.cwd >> 10) & 3)#define PRECISION ((I387.cwd >> 8) & 3)#define BITS24	0#define BITS53	2#define BITS64	3#define ROUND_NEAREST	0#define ROUND_DOWN	1#define ROUND_UP	2#define ROUND_0		3#define CONSTZ   (temp_real_unaligned) {0x0000,0x0000,0x0000,0x0000,0x0000}#define CONST1   (temp_real_unaligned) {0x0000,0x0000,0x0000,0x8000,0x3FFF}#define CONSTPI  (temp_real_unaligned) {0xC235,0x2168,0xDAA2,0xC90F,0x4000}#define CONSTLN2 (temp_real_unaligned) {0x79AC,0xD1CF,0x17F7,0xB172,0x3FFE}#define CONSTLG2 (temp_real_unaligned) {0xF799,0xFBCF,0x9A84,0x9A20,0x3FFD}#define CONSTL2E (temp_real_unaligned) {0xF0BC,0x5C17,0x3B29,0xB8AA,0x3FFF}#define CONSTL2T (temp_real_unaligned) {0x8AFE,0xCD1B,0x784B,0xD49A,0x4000}#define set_IE() (I387.swd |= 1)#define set_DE() (I387.swd |= 2)#define set_ZE() (I387.swd |= 4)#define set_OE() (I387.swd |= 8)#define set_UE() (I387.swd |= 16)#define set_PE() (I387.swd |= 32)#define set_C0() (I387.swd |= 0x0100)#define set_C1() (I387.swd |= 0x0200)#define set_C2() (I387.swd |= 0x0400)#define set_C3() (I387.swd |= 0x4000)/* ea.c */char * ea(struct info * __info, unsigned short __code);/* convert.c */void short_to_temp(const short_real * __a, temp_real * __b);void long_to_temp(const long_real * __a, temp_real * __b);void temp_to_short(const temp_real * __a, short_real * __b);void temp_to_long(const temp_real * __a, long_real * __b);void real_to_int(const temp_real * __a, temp_int * __b);void int_to_real(const temp_int * __a, temp_real * __b);/* get_put.c */void get_short_real(temp_real *, struct info *, unsigned short);void get_long_real(temp_real *, struct info *, unsigned short);void get_temp_real(temp_real *, struct info *, unsigned short);void get_short_int(temp_real *, struct info *, unsigned short);void get_long_int(temp_real *, struct info *, unsigned short);void get_longlong_int(temp_real *, struct info *, unsigned short);void get_BCD(temp_real *, struct info *, unsigned short);void put_short_real(const temp_real *, struct info *, unsigned short);void put_long_real(const temp_real *, struct info *, unsigned short);void put_temp_real(const temp_real *, struct info *, unsigned short);void put_short_int(const temp_real *, struct info *, unsigned short);void put_long_int(const temp_real *, struct info *, unsigned short);void put_longlong_int(const temp_real *, struct info *, unsigned short);void put_BCD(const temp_real *, struct info *, unsigned short);/* add.c */void fadd(const temp_real *, const temp_real *, temp_real *);/* mul.c */void fmul(const temp_real *, const temp_real *, temp_real *);/* div.c */void fdiv(const temp_real *, const temp_real *, temp_real *);/* compare.c */void fcom(const temp_real *, const temp_real *);void fucom(const temp_real *, const temp_real *);void ftst(const temp_real *);#endif