include/linux/math

/* */
   1 #ifndef _LINUX_MATH_EMU_H
   2 #define _LINUX_MATH_EMU_H
   3 
   4 #include <linux/sched.h>
   5 
   6 struct info {
   7         long ___orig_eip;
   8         long ___ret_from_system_call;
   9         long ___ebx;
  10         long ___ecx;
  11         long ___edx;
  12         long ___esi;
  13         long ___edi;
  14         long ___ebp;
  15         long ___eax;
  16         long ___ds;
  17         long ___es;
  18         long ___fs;
  19         long ___gs;
  20         long ___orig_eax;
  21         long ___eip;
  22         long ___cs;
  23         long ___eflags;
  24         long ___esp;
  25         long ___ss;
  26 };
  27 
  28 #define EAX (info->___eax)
  29 #define EBX (info->___ebx)
  30 #define ECX (info->___ecx)
  31 #define EDX (info->___edx)
  32 #define ESI (info->___esi)
  33 #define EDI (info->___edi)
  34 #define EBP (info->___ebp)
  35 #define ESP (info->___esp)
  36 #define EIP (info->___eip)
  37 #define ORIG_EIP (info->___orig_eip)
  38 #define EFLAGS (info->___eflags)
  39 #define DS (*(unsigned short *) &(info->___ds))
  40 #define ES (*(unsigned short *) &(info->___es))
  41 #define FS (*(unsigned short *) &(info->___fs))
  42 #define CS (*(unsigned short *) &(info->___cs))
  43 #define SS (*(unsigned short *) &(info->___ss))
  44 
  45 void __math_abort(struct info *, unsigned int);
  46 
  47 #define math_abort(x,y) \
  48 (((volatile void (*)(struct info *,unsigned int)) __math_abort)((x),(y)))
  49 
  50 /*
  51  * Gcc forces this stupid alignment problem: I want to use only two longs
  52  * for the temporary real 64-bit mantissa, but then gcc aligns out the
  53  * structure to 12 bytes which breaks things in math_emulate.c. Shit. I
  54  * want some kind of "no-alignt" pragma or something.
  55  */
  56 
  57 typedef struct {
  58         long a,b;
  59         short exponent;
  60 } temp_real;
  61 
  62 typedef struct {
  63         short m0,m1,m2,m3;
  64         short exponent;
  65 } temp_real_unaligned;
  66 
  67 #define real_to_real(a,b) \
  68 ((*(long long *) (b) = *(long long *) (a)),((b)->exponent = (a)->exponent))
  69 
  70 typedef struct {
  71         long a,b;
  72 } long_real;
  73 
  74 typedef long short_real;
  75 
  76 typedef struct {
  77         long a,b;
  78         short sign;
  79 } temp_int;
  80 
  81 struct swd {
  82         int ie:1;
  83         int de:1;
  84         int ze:1;
  85         int oe:1;
  86         int ue:1;
  87         int pe:1;
  88         int sf:1;
  89         int ir:1;
  90         int c0:1;
  91         int c1:1;
  92         int c2:1;
  93         int top:3;
  94         int c3:1;
  95         int b:1;
  96 };
  97 
  98 #define I387 (current->tss.i387)
  99 #define SWD (*(struct swd *) &I387.swd)
 100 #define ROUNDING ((I387.cwd >> 10) & 3)
 101 #define PRECISION ((I387.cwd >> 8) & 3)
 102 
 103 #define BITS24  0
 104 #define BITS53  2
 105 #define BITS64  3
 106 
 107 #define ROUND_NEAREST   0
 108 #define ROUND_DOWN      1
 109 #define ROUND_UP        2
 110 #define ROUND_0         3
 111 
 112 #define CONSTZ   (temp_real_unaligned) {0x0000,0x0000,0x0000,0x0000,0x0000}
 113 #define CONST1   (temp_real_unaligned) {0x0000,0x0000,0x0000,0x8000,0x3FFF}
 114 #define CONSTPI  (temp_real_unaligned) {0xC235,0x2168,0xDAA2,0xC90F,0x4000}
 115 #define CONSTLN2 (temp_real_unaligned) {0x79AC,0xD1CF,0x17F7,0xB172,0x3FFE}
 116 #define CONSTLG2 (temp_real_unaligned) {0xF799,0xFBCF,0x9A84,0x9A20,0x3FFD}
 117 #define CONSTL2E (temp_real_unaligned) {0xF0BC,0x5C17,0x3B29,0xB8AA,0x3FFF}
 118 #define CONSTL2T (temp_real_unaligned) {0x8AFE,0xCD1B,0x784B,0xD49A,0x4000}
 119 
 120 #define set_IE() (I387.swd |= 1)
 121 #define set_DE() (I387.swd |= 2)
 122 #define set_ZE() (I387.swd |= 4)
 123 #define set_OE() (I387.swd |= 8)
 124 #define set_UE() (I387.swd |= 16)
 125 #define set_PE() (I387.swd |= 32)
 126 
 127 #define set_C0() (I387.swd |= 0x0100)
 128 #define set_C1() (I387.swd |= 0x0200)
 129 #define set_C2() (I387.swd |= 0x0400)
 130 #define set_C3() (I387.swd |= 0x4000)
 131 
 132 /* ea.c */
 133 
 134 char * ea(struct info * __info, unsigned short __code);
 135 
 136 /* convert.c */
 137 
 138 void frndint(const temp_real * __a, temp_real * __b);
 139 void short_to_temp(const short_real * __a, temp_real * __b);
 140 void long_to_temp(const long_real * __a, temp_real * __b);
 141 void temp_to_short(const temp_real * __a, short_real * __b);
 142 void temp_to_long(const temp_real * __a, long_real * __b);
 143 void real_to_int(const temp_real * __a, temp_int * __b);
 144 void int_to_real(const temp_int * __a, temp_real * __b);
 145 
 146 /* get_put.c */
 147 
 148 void get_short_real(temp_real *, struct info *, unsigned short);
 149 void get_long_real(temp_real *, struct info *, unsigned short);
 150 void get_temp_real(temp_real *, struct info *, unsigned short);
 151 void get_short_int(temp_real *, struct info *, unsigned short);
 152 void get_long_int(temp_real *, struct info *, unsigned short);
 153 void get_longlong_int(temp_real *, struct info *, unsigned short);
 154 void get_BCD(temp_real *, struct info *, unsigned short);
 155 void put_short_real(const temp_real *, struct info *, unsigned short);
 156 void put_long_real(const temp_real *, struct info *, unsigned short);
 157 void put_temp_real(const temp_real *, struct info *, unsigned short);
 158 void put_short_int(const temp_real *, struct info *, unsigned short);
 159 void put_long_int(const temp_real *, struct info *, unsigned short);
 160 void put_longlong_int(const temp_real *, struct info *, unsigned short);
 161 void put_BCD(const temp_real *, struct info *, unsigned short);
 162 
 163 /* add.c */
 164 
 165 void fadd(const temp_real *, const temp_real *, temp_real *);
 166 
 167 /* mul.c */
 168 
 169 void fmul(const temp_real *, const temp_real *, temp_real *);
 170 
 171 /* div.c */
 172 
 173 void fdiv(const temp_real *, const temp_real *, temp_real *);
 174 
 175 /* sqrt.c */
 176 
 177 void fsqrt(const temp_real *, temp_real *);
 178 
 179 /* compare.c */
 180 
 181 void fcom(const temp_real *, const temp_real *);
 182 void fucom(const temp_real *, const temp_real *);
 183 void ftst(const temp_real *);
 184 
 185 #endif
/* */
root/include/linux/math_emu.h

INCLUDED FROM
