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/*
* linux/include/linux/math_emu.h
*
* (C) 1991 Linus Torvalds
*
* $FreeBSD$
*/
#ifndef _LINUX_MATH_EMU_H
#define _LINUX_MATH_EMU_H
/*#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;
};
struct i387_struct {
long cwd;
long swd;
long twd;
long fip;
long fcs;
long foo;
long fos;
long st_space[20]; /* 8*10 bytes for each FP-reg = 80 bytes */
};
#define I387 (*(struct i387_struct *)&(((struct pcb *)curproc->p_addr)->pcb_savefpu))
#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 */
static char * ea(struct trapframe *, unsigned short);
/* convert.c */
static void frndint(const temp_real * __a, temp_real * __b);
static void Fscale(const temp_real *, const temp_real *, temp_real *);
static void short_to_temp(const short_real * __a, temp_real * __b);
static void long_to_temp(const long_real * __a, temp_real * __b);
static void temp_to_short(const temp_real * __a, short_real * __b);
static void temp_to_long(const temp_real * __a, long_real * __b);
static void real_to_int(const temp_real * __a, temp_int * __b);
static void int_to_real(const temp_int * __a, temp_real * __b);
/* get_put.c */
static void get_short_real(temp_real *, struct trapframe *, unsigned short);
static void get_long_real(temp_real *, struct trapframe *, unsigned short);
static void get_temp_real(temp_real *, struct trapframe *, unsigned short);
static void get_short_int(temp_real *, struct trapframe *, unsigned short);
static void get_long_int(temp_real *, struct trapframe *, unsigned short);
static void get_longlong_int(temp_real *, struct trapframe *, unsigned short);
static void get_BCD(temp_real *, struct trapframe *, unsigned short);
static void put_short_real(const temp_real *, struct trapframe *, unsigned short);
static void put_long_real(const temp_real *, struct trapframe *, unsigned short);
static void put_temp_real(const temp_real *, struct trapframe *, unsigned short);
static void put_short_int(const temp_real *, struct trapframe *, unsigned short);
static void put_long_int(const temp_real *, struct trapframe *, unsigned short);
static void put_longlong_int(const temp_real *, struct trapframe *, unsigned short);
static void put_BCD(const temp_real *, struct trapframe *, unsigned short);
/* add.c */
static void fadd(const temp_real *, const temp_real *, temp_real *);
/* mul.c */
static void fmul(const temp_real *, const temp_real *, temp_real *);
/* div.c */
static void fdiv(const temp_real *, const temp_real *, temp_real *);
/* compare.c */
static void fcom(const temp_real *, const temp_real *);
static void fucom(const temp_real *, const temp_real *);
static void ftst(const temp_real *);
#endif
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