1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
#define _FP_W_TYPE_SIZE 64
#ifdef _WIN64
#define _FP_W_TYPE unsigned long long
#define _FP_WS_TYPE signed long long
#define _FP_I_TYPE long long
#else
#define _FP_W_TYPE unsigned long
#define _FP_WS_TYPE signed long
#define _FP_I_TYPE long
#endif
typedef int TItype __attribute__ ((mode (TI)));
typedef unsigned int UTItype __attribute__ ((mode (TI)));
#define TI_BITS (__CHAR_BIT__ * (int)sizeof(TItype))
/* The type of the result of a floating point comparison. This must
match `__libgcc_cmp_return__' in GCC for the target. */
typedef int __gcc_CMPtype __attribute__ ((mode (__libgcc_cmp_return__)));
#define CMPtype __gcc_CMPtype
#define _FP_MUL_MEAT_Q(R,X,Y) \
_FP_MUL_MEAT_2_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
#define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_2_udiv(Q,R,X,Y)
#define _FP_NANFRAC_S _FP_QNANBIT_S
#define _FP_NANFRAC_D _FP_QNANBIT_D
#define _FP_NANFRAC_E _FP_QNANBIT_E, 0
#define _FP_NANFRAC_Q _FP_QNANBIT_Q, 0
#define _FP_NANSIGN_S 1
#define _FP_NANSIGN_D 1
#define _FP_NANSIGN_E 1
#define _FP_NANSIGN_Q 1
#define _FP_KEEPNANFRACP 1
/* Here is something Intel misdesigned: the specs don't define
the case where we have two NaNs with same mantissas, but
different sign. Different operations pick up different NaNs. */
#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \
do { \
if (_FP_FRAC_GT_##wc(X, Y) \
|| (_FP_FRAC_EQ_##wc(X,Y) && (OP == '+' || OP == '*'))) \
{ \
R##_s = X##_s; \
_FP_FRAC_COPY_##wc(R,X); \
} \
else \
{ \
R##_s = Y##_s; \
_FP_FRAC_COPY_##wc(R,Y); \
} \
R##_c = FP_CLS_NAN; \
} while (0)
#define FP_EX_INVALID 0x01
#define FP_EX_DENORM 0x02
#define FP_EX_DIVZERO 0x04
#define FP_EX_OVERFLOW 0x08
#define FP_EX_UNDERFLOW 0x10
#define FP_EX_INEXACT 0x20
struct fenv
{
unsigned short int __control_word;
unsigned short int __unused1;
unsigned short int __status_word;
unsigned short int __unused2;
unsigned short int __tags;
unsigned short int __unused3;
unsigned int __eip;
unsigned short int __cs_selector;
unsigned int __opcode:11;
unsigned int __unused4:5;
unsigned int __data_offset;
unsigned short int __data_selector;
unsigned short int __unused5;
};
#ifdef __AVX__
#define ASM_INVALID "vdivss %0, %0, %0"
#define ASM_DIVZERO "vdivss %1, %0, %0"
#else
#define ASM_INVALID "divss %0, %0"
#define ASM_DIVZERO "divss %1, %0"
#endif
#define FP_HANDLE_EXCEPTIONS \
do { \
if (_fex & FP_EX_INVALID) \
{ \
float f = 0.0; \
__asm__ __volatile__ (ASM_INVALID : : "x" (f)); \
} \
if (_fex & FP_EX_DIVZERO) \
{ \
float f = 1.0, g = 0.0; \
__asm__ __volatile__ (ASM_DIVZERO : : "x" (f), "x" (g)); \
} \
if (_fex & FP_EX_OVERFLOW) \
{ \
struct fenv temp; \
__asm__ __volatile__ ("fnstenv %0" : "=m" (temp)); \
temp.__status_word |= FP_EX_OVERFLOW; \
__asm__ __volatile__ ("fldenv %0" : : "m" (temp)); \
__asm__ __volatile__ ("fwait"); \
} \
if (_fex & FP_EX_UNDERFLOW) \
{ \
struct fenv temp; \
__asm__ __volatile__ ("fnstenv %0" : "=m" (temp)); \
temp.__status_word |= FP_EX_UNDERFLOW; \
__asm__ __volatile__ ("fldenv %0" : : "m" (temp)); \
__asm__ __volatile__ ("fwait"); \
} \
if (_fex & FP_EX_INEXACT) \
{ \
struct fenv temp; \
__asm__ __volatile__ ("fnstenv %0" : "=m" (temp)); \
temp.__status_word |= FP_EX_INEXACT; \
__asm__ __volatile__ ("fldenv %0" : : "m" (temp)); \
__asm__ __volatile__ ("fwait"); \
} \
} while (0)
#define FP_RND_NEAREST 0
#define FP_RND_ZERO 0xc00
#define FP_RND_PINF 0x800
#define FP_RND_MINF 0x400
#define _FP_DECL_EX \
unsigned short _fcw __attribute__ ((unused)) = FP_RND_NEAREST
#define FP_INIT_ROUNDMODE \
do { \
__asm__ ("fnstcw %0" : "=m" (_fcw)); \
} while (0)
#define FP_ROUNDMODE (_fcw & 0xc00)
#define __LITTLE_ENDIAN 1234
#define __BIG_ENDIAN 4321
#define __BYTE_ORDER __LITTLE_ENDIAN
/* Define ALIASNAME as a strong alias for NAME. */
#if defined __MACH__
/* Mach-O doesn't support aliasing. If these functions ever return
anything but CMPtype we need to revisit this... */
#define strong_alias(name, aliasname) \
CMPtype aliasname (TFtype a, TFtype b) { return name(a, b); }
#else
# define strong_alias(name, aliasname) _strong_alias(name, aliasname)
# define _strong_alias(name, aliasname) \
extern __typeof (name) aliasname __attribute__ ((alias (#name)));
#endif
|
