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
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/* Copyright (C) 2007 Free Software Foundation.
Verify that built-in folding of logb, ilogb and significand is
correctly performed by the compiler.
Origin: Kaveh R. Ghazi, February 22, 2007. */
/* { dg-do link } */
/* { dg-options "-fno-finite-math-only" { target sh*-*-* } } */
/* In order to fold algebraic exprs below, targets with "composite"
floating point formats need -funsafe-math-optimizations. */
/* { dg-require-effective-target inf } */
/* { dg-options "-funsafe-math-optimizations" { target powerpc*-*-* } } */
extern void link_error(int);
/* Return TRUE if the sign of X != sign of Y. This is important when
comparing signed zeros. */
#define CKSGN_F(X,Y) \
(__builtin_copysignf(1.0F,(X)) != __builtin_copysignf(1.0F,(Y)))
#define CKSGN(X,Y) \
(__builtin_copysign(1.0,(X)) != __builtin_copysign(1.0,(Y)))
#define CKSGN_L(X,Y) \
(__builtin_copysignl(1.0L,(X)) != __builtin_copysignl(1.0L,(Y)))
/* Test that FUNC(ARG) == RES. Check the sign in case we get -0.0. */
#define TESTIT(FUNC,ARG,RES) do { \
if (__builtin_##FUNC##f(ARG##f) != RES##f \
|| CKSGN_F(__builtin_##FUNC##f(ARG##f),RES##f)) \
link_error(__LINE__); \
if (__builtin_##FUNC(ARG) != RES \
|| CKSGN(__builtin_##FUNC(ARG),RES)) \
link_error(__LINE__); \
if (__builtin_##FUNC##l(ARG##l) != RES##l \
|| CKSGN_L(__builtin_##FUNC##l(ARG##l),RES##l)) \
link_error(__LINE__); \
} while (0)
/* Test that FUNC(ARG) == RES. RES is an int so it can't be -0.0. */
#define TESTIT2(FUNC,ARG,RES) do { \
if (__builtin_##FUNC##f(ARG##f) != RES) \
link_error(__LINE__); \
if (__builtin_##FUNC(ARG) != RES) \
link_error(__LINE__); \
if (__builtin_##FUNC##l(ARG##l) != RES) \
link_error(__LINE__); \
} while (0)
/* Test if FUNCRES(FUNC(NEG FUNCARG(ARGARG))) is false. Check the
sign as well. */
#define TESTIT3(FUNC,NEG,FUNCARG,ARGARG,FUNCRES,NEG2) do { \
if (!__builtin_##FUNCRES##f(__builtin_##FUNC(NEG __builtin_##FUNCARG##f(ARGARG))) \
|| CKSGN_F(__builtin_##FUNC##f(NEG __builtin_##FUNCARG##f(ARGARG)), NEG2 __builtin_##FUNCARG##f(ARGARG))) \
link_error(__LINE__); \
if (!__builtin_##FUNCRES(__builtin_##FUNC(NEG __builtin_##FUNCARG(ARGARG))) \
|| CKSGN(__builtin_##FUNC(NEG __builtin_##FUNCARG(ARGARG)), NEG2 __builtin_##FUNCARG(ARGARG))) \
link_error(__LINE__); \
if (!__builtin_##FUNCRES##l(__builtin_##FUNC##l(NEG __builtin_##FUNCARG##l(ARGARG))) \
|| CKSGN_L(__builtin_##FUNC##l(NEG __builtin_##FUNCARG##l(ARGARG)), NEG2 __builtin_##FUNCARG##l(ARGARG))) \
link_error(__LINE__); \
} while (0)
void __attribute__ ((__noinline__))
foo(void)
{
/* If radix == 2, test that logb(ARG2) -> ARG3. */
#if __FLT_RADIX__ == 2
TESTIT (logb, -0x1p40, 40.0);
TESTIT (logb, -0x1p30, 30.0);
TESTIT (logb, -0x1p20, 20.0);
TESTIT (logb, -0x1p10, 10.0);
TESTIT (logb, -0x1p5, 5.0);
TESTIT (logb, -100/3.0, 5.0);
TESTIT (logb, -2.0, 1.0);
TESTIT (logb, -1.5, 0.0);
TESTIT (logb, -1.0, 0.0);
TESTIT (logb, -1/3.0, -2.0);
TESTIT (logb, -1/9.0, -4.0);
TESTIT (logb, -0x1p-5, -5.0);
TESTIT (logb, -0x1p-10, -10.0);
TESTIT (logb, -0x1p-20, -20.0);
TESTIT (logb, -0x1p-30, -30.0);
TESTIT (logb, -0x1p-40, -40.0);
TESTIT (logb, 0x1p-40, -40.0);
TESTIT (logb, 0x1p-30, -30.0);
TESTIT (logb, 0x1p-20, -20.0);
TESTIT (logb, 0x1p-10, -10.0);
TESTIT (logb, 0x1p-5, -5.0);
TESTIT (logb, 1/9.0, -4.0);
TESTIT (logb, 1/3.0, -2.0);
TESTIT (logb, 1.0, 0.0);
TESTIT (logb, 1.5, 0.0);
TESTIT (logb, 2.0, 1.0);
TESTIT (logb, 100/3.0, 5.0);
TESTIT (logb, 0x1p5, 5.0);
TESTIT (logb, 0x1p10, 10.0);
TESTIT (logb, 0x1p20, 20.0);
TESTIT (logb, 0x1p30, 30.0);
TESTIT (logb, 0x1p40, 40.0);
#endif
/* If radix == 2, test that ilogb(ARG2) -> ARG3. */
#if __FLT_RADIX__ == 2
TESTIT2 (ilogb, -0x1p40, 40);
TESTIT2 (ilogb, -0x1p30, 30);
TESTIT2 (ilogb, -0x1p20, 20);
TESTIT2 (ilogb, -0x1p10, 10);
TESTIT2 (ilogb, -0x1p5, 5);
TESTIT2 (ilogb, -100/3.0, 5);
TESTIT2 (ilogb, -2.0, 1);
TESTIT2 (ilogb, -1.5, 0);
TESTIT2 (ilogb, -1.0, 0);
TESTIT2 (ilogb, -1/3.0, -2);
TESTIT2 (ilogb, -1/9.0, -4);
TESTIT2 (ilogb, -0x1p-5, -5);
TESTIT2 (ilogb, -0x1p-10, -10);
TESTIT2 (ilogb, -0x1p-20, -20);
TESTIT2 (ilogb, -0x1p-30, -30);
TESTIT2 (ilogb, -0x1p-40, -40);
TESTIT2 (ilogb, 0x1p-40, -40);
TESTIT2 (ilogb, 0x1p-30, -30);
TESTIT2 (ilogb, 0x1p-20, -20);
TESTIT2 (ilogb, 0x1p-10, -10);
TESTIT2 (ilogb, 0x1p-5, -5);
TESTIT2 (ilogb, 1/9.0, -4);
TESTIT2 (ilogb, 1/3.0, -2);
TESTIT2 (ilogb, 1.0, 0);
TESTIT2 (ilogb, 1.5, 0);
TESTIT2 (ilogb, 2.0, 1);
TESTIT2 (ilogb, 100/3.0, 5);
TESTIT2 (ilogb, 0x1p5, 5);
TESTIT2 (ilogb, 0x1p10, 10);
TESTIT2 (ilogb, 0x1p20, 20);
TESTIT2 (ilogb, 0x1p30, 30);
TESTIT2 (ilogb, 0x1p40, 40);
#endif
/* If radix == 2, test that significand(ARG2) -> ARG3. Zero always
folds regardless of the radix. */
TESTIT (significand, -0.0, -0.0);
TESTIT (significand, 0.0, 0.0);
#if __FLT_RADIX__ == 2
TESTIT (significand, -0x1p5, -1.0);
TESTIT (significand, -100/3.0, -100/96.0);
TESTIT (significand, -1.5, -1.5);
TESTIT (significand, -1.0, -1.0);
TESTIT (significand, -1/3.0, -4/3.0);
TESTIT (significand, -1/9.0, -16/9.0);
TESTIT (significand, -0x1p-5, -1.0);
TESTIT (significand, 0x1p-5, 1.0);
TESTIT (significand, 1/9.0, 16/9.0);
TESTIT (significand, 1/3.0, 4/3.0);
TESTIT (significand, 1.0, 1.0);
TESTIT (significand, 1.5, 1.5);
TESTIT (significand, 100/3.0, 100/96.0);
TESTIT (significand, 0x1p5, 1.0);
#endif
/* Test for f(+-Inf) -> +-Inf and f(+-NaN) -> +-NaN, regardless of
the radix. */
TESTIT3 (logb, ,inf, , isinf, );
TESTIT3 (logb, - ,inf, , isinf, );
TESTIT3 (logb, ,nan, "", isnan, );
TESTIT3 (logb, - ,nan, "", isnan, -);
TESTIT3 (significand, ,inf, , isinf, );
TESTIT3 (significand, - ,inf, , isinf, -);
TESTIT3 (significand, ,nan, "", isnan, );
TESTIT3 (significand, - ,nan, "", isnan, -);
}
int main()
{
foo ();
return 0;
}
|
