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11 #ifndef _FPU_EMU_H_
12 #define _FPU_EMU_H_
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18
19
20 #define DENORM_OPERAND
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28
29 #define PECULIAR_486
30
31 #ifdef __ASSEMBLER__
32 #include "fpu_asm.h"
33 #define Const(x) $##x
34 #else
35 #define Const(x) x
36 #endif
37
38 #define EXP_BIAS Const(0)
39 #define EXP_OVER Const(0x4000)
40 #define EXP_UNDER Const(-0x3fff)
41 #define EXP_Infinity EXP_OVER
42 #define EXP_NaN EXP_OVER
43
44 #define SIGN_POS Const(0)
45 #define SIGN_NEG Const(1)
46
47
48 #define TW_Valid Const(0)
49 #define TW_Zero Const(1)
50
51
52 #define TW_Infinity Const(5)
53 #define TW_NaN Const(6)
54
55 #define TW_Empty Const(7)
56
57
58 #ifndef __ASSEMBLER__
59
60 #include <linux/math_emu.h>
61 #include <linux/linkage.h>
62
63 #ifdef PARANOID
64 extern char emulating;
65 # define RE_ENTRANT_CHECK_OFF emulating = 0
66 # define RE_ENTRANT_CHECK_ON emulating = 1
67 #else
68 # define RE_ENTRANT_CHECK_OFF
69 # define RE_ENTRANT_CHECK_ON
70 #endif PARANOID
71
72 #define FWAIT_OPCODE 0x9b
73 #define OP_SIZE_PREFIX 0x66
74 #define ADDR_SIZE_PREFIX 0x67
75 #define PREFIX_CS 0x2e
76 #define PREFIX_DS 0x3e
77 #define PREFIX_ES 0x26
78 #define PREFIX_SS 0x36
79 #define PREFIX_FS 0x64
80 #define PREFIX_GS 0x65
81 #define PREFIX_REPE 0xf3
82 #define PREFIX_REPNE 0xf2
83 #define PREFIX_LOCK 0xf0
84 #define PREFIX_CS_ 1
85 #define PREFIX_DS_ 2
86 #define PREFIX_ES_ 3
87 #define PREFIX_FS_ 4
88 #define PREFIX_GS_ 5
89 #define PREFIX_SS_ 6
90
91
92
93 #define NO_NET_DATA_EFFECT \
94 { FPU_data_address = (void *)data_operand_offset; \
95 FPU_data_selector = operand_selector; }
96 #define NO_NET_INSTR_EFFECT \
97 { FPU_entry_eip = ip_offset; \
98 FPU_entry_op_cs = cs_selector; }
99
100
101 typedef void (*FUNC)(void);
102 typedef struct fpu_reg FPU_REG;
103 typedef struct { unsigned char address_size, operand_size, segment; }
104 overrides;
105
106 typedef struct { overrides override;
107 unsigned char vm86; } fpu_addr_modes;
108
109 #define st(x) ( regs[((top+x) &7 )] )
110
111 #define STACK_OVERFLOW (st_new_ptr = &st(-1), st_new_ptr->tag != TW_Empty)
112 #define NOT_EMPTY(i) (st(i).tag != TW_Empty)
113 #define NOT_EMPTY_0 (FPU_st0_tag ^ TW_Empty)
114
115 extern unsigned char FPU_rm;
116
117 extern char FPU_st0_tag;
118 extern FPU_REG *FPU_st0_ptr;
119
120
121
122 extern unsigned short FPU_data_selector;
123 extern unsigned long FPU_entry_op_cs;
124
125 extern FPU_REG FPU_loaded_data;
126
127 #define pop() { FPU_st0_ptr->tag = TW_Empty; top++; }
128
129
130 #define push() { top--; FPU_st0_ptr = st_new_ptr; }
131
132
133 #define reg_move(x, y) { \
134 *(short *)&((y)->sign) = *(short *)&((x)->sign); \
135 *(long *)&((y)->exp) = *(long *)&((x)->exp); \
136 *(long long *)&((y)->sigl) = *(long long *)&((x)->sigl); }
137
138 #define significand(x) ( ((unsigned long long *)&((x)->sigl))[0] )
139
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142
143
144 asmlinkage void mul64(unsigned long long const *a, unsigned long long const *b,
145 unsigned long long *result);
146 asmlinkage void poly_div2(unsigned long long *x);
147 asmlinkage void poly_div4(unsigned long long *x);
148 asmlinkage void poly_div16(unsigned long long *x);
149 asmlinkage void polynomial(unsigned accum[], unsigned const x[],
150 unsigned short const terms[][4], int const n);
151 asmlinkage void normalize(FPU_REG *x);
152 asmlinkage void normalize_nuo(FPU_REG *x);
153 asmlinkage int reg_div(FPU_REG const *arg1, FPU_REG const *arg2,
154 FPU_REG *answ, unsigned int control_w);
155 asmlinkage int reg_u_sub(FPU_REG const *arg1, FPU_REG const *arg2,
156 FPU_REG *answ, unsigned int control_w);
157 asmlinkage int reg_u_mul(FPU_REG const *arg1, FPU_REG const *arg2,
158 FPU_REG *answ, unsigned int control_w);
159 asmlinkage int reg_u_div(FPU_REG const *arg1, FPU_REG const *arg2,
160 FPU_REG *answ, unsigned int control_w);
161 asmlinkage int reg_u_add(FPU_REG const *arg1, FPU_REG const *arg2,
162 FPU_REG *answ, unsigned int control_w);
163 asmlinkage int wm_sqrt(FPU_REG *n, unsigned int control_w);
164 asmlinkage unsigned shrx(void *l, unsigned x);
165 asmlinkage unsigned shrxs(void *v, unsigned x);
166 asmlinkage unsigned long div_small(unsigned long long *x, unsigned long y);
167 asmlinkage void round_reg(FPU_REG *arg, unsigned int extent,
168 unsigned int control_w);
169
170 #ifndef MAKING_PROTO
171 #include "fpu_proto.h"
172 #endif
173
174 #endif __ASSEMBLER__
175
176 #endif _FPU_EMU_H_