1 /* Copyright (C) 2007 Free Software Foundation.
2
3 Verify that built-in folding of ldexp et al. is correctly performed
4 by the compiler.
5
6 Origin: Kaveh R. Ghazi, February 17, 2007. */
7
8 /* { dg-do link } */
9 /* { dg-options "-fno-finite-math-only" { target sh*-*-* } } */
10 /* { dg-require-effective-target inf } */
11 /* { dg-skip-if "" { *-*-* } { "-O0" } { "" } } */
12
13 extern void link_error(int);
14
15 /* Return TRUE if the sign of X != sign of Y. This is important when
16 comparing signed zeros. */
17 #define CKSGN_F(X,Y) \
18 (__builtin_copysignf(1.0F,(X)) != __builtin_copysignf(1.0F,(Y)))
19 #define CKSGN(X,Y) \
20 (__builtin_copysign(1.0,(X)) != __builtin_copysign(1.0,(Y)))
21 #define CKSGN_L(X,Y) \
22 (__builtin_copysignl(1.0L,(X)) != __builtin_copysignl(1.0L,(Y)))
23
24 /* Test that FUNC(ARG1,ARG2) == RES. Check the sign for -0.0. */
25 #define TESTIT(FUNC,ARG1,ARG2,RES) do { \
26 if (__builtin_##FUNC##f(ARG1##f,ARG2) != RES##f \
27 || CKSGN_F(__builtin_##FUNC##f(ARG1##f,ARG2),RES##f)) \
28 link_error(__LINE__); \
29 if (__builtin_##FUNC(ARG1,ARG2) != RES \
30 || CKSGN(__builtin_##FUNC(ARG1,ARG2),RES)) \
31 link_error(__LINE__); \
32 if (__builtin_##FUNC##l(ARG1##l,ARG2) != RES##l \
33 || CKSGN_L(__builtin_##FUNC##l(ARG1##l,ARG2),RES##l)) \
34 link_error(__LINE__); \
35 } while (0)
36
37 /* Test that (long)FUNC(ARG1,ARG2) == (long)RES. The cast is
38 necessary when RES is not a constant. */
39 #define TESTIT2(FUNC,ARG1,ARG2,RES) do { \
40 if ((long)__builtin_##FUNC##f(ARG1##f,ARG2) != (long)RES##f) \
41 link_error(__LINE__); \
42 if ((long)__builtin_##FUNC(ARG1,ARG2) != (long)RES) \
43 link_error(__LINE__); \
44 if ((long)__builtin_##FUNC##l(ARG1##l,ARG2) != (long)RES##l) \
45 link_error(__LINE__); \
46 } while (0)
47
48 /* Test that FUNCRES(FUNC(NEG FUNCARG(ARGARG),ARG2)) is false. Check
49 the sign as well. */
50 #define TESTIT3(FUNC,NEG,FUNCARG,ARGARG,ARG2,FUNCRES) do { \
51 if (!__builtin_##FUNCRES##f(__builtin_##FUNC##f(NEG __builtin_##FUNCARG##f(ARGARG),ARG2)) \
52 || CKSGN_F(__builtin_##FUNC##f(NEG __builtin_##FUNCARG##f(ARGARG),ARG2), NEG __builtin_##FUNCARG##f(ARGARG))) \
53 link_error(__LINE__); \
54 if (!__builtin_##FUNCRES(__builtin_##FUNC(NEG __builtin_##FUNCARG(ARGARG),ARG2)) \
55 || CKSGN(__builtin_##FUNC(NEG __builtin_##FUNCARG(ARGARG),ARG2), NEG __builtin_##FUNCARG(ARGARG))) \
56 link_error(__LINE__); \
57 if (!__builtin_##FUNCRES##l(__builtin_##FUNC##l(NEG __builtin_##FUNCARG##l(ARGARG),ARG2)) \
58 || CKSGN_L(__builtin_##FUNC##l(NEG __builtin_##FUNCARG##l(ARGARG),ARG2), NEG __builtin_##FUNCARG##l(ARGARG))) \
59 link_error(__LINE__); \
60 } while (0)
61
62 /* Using foo==MIN/MAX float values, test that FUNC(foo,EXP) == foo*exp2(EXP),
63 and also that FUNC(foo,-EXP) == foo*exp2(-EXP). */
64 #define TESTIT4(FUNC,EXP) do { \
65 if (__builtin_##FUNC##f(__FLT_MIN__,EXP) != __FLT_MIN__*__builtin_exp2f(EXP)) \
66 link_error(__LINE__); \
67 if (__builtin_##FUNC##f(-__FLT_MIN__,EXP) != -__FLT_MIN__*__builtin_exp2f(EXP)) \
68 link_error(__LINE__); \
69 if (__builtin_##FUNC(__DBL_MIN__,EXP) != __DBL_MIN__*__builtin_exp2(EXP)) \
70 link_error(__LINE__); \
71 if (__builtin_##FUNC(-__DBL_MIN__,EXP) != -__DBL_MIN__*__builtin_exp2(EXP)) \
72 link_error(__LINE__); \
73 if (__builtin_##FUNC##l(__LDBL_MIN__,EXP) != __LDBL_MIN__*__builtin_exp2l(EXP)) \
74 link_error(__LINE__); \
75 if (__builtin_##FUNC##l(-__LDBL_MIN__,EXP) != -__LDBL_MIN__*__builtin_exp2l(EXP)) \
76 link_error(__LINE__); \
77 if (__builtin_##FUNC##f(__FLT_MAX__,-EXP) != __FLT_MAX__*__builtin_exp2f(-EXP)) \
78 link_error(__LINE__); \
79 if (__builtin_##FUNC##f(-__FLT_MAX__,-EXP) != -__FLT_MAX__*__builtin_exp2f(-EXP)) \
80 link_error(__LINE__); \
81 if (__builtin_##FUNC(__DBL_MAX__,-EXP) != __DBL_MAX__*__builtin_exp2(-EXP)) \
82 link_error(__LINE__); \
83 if (__builtin_##FUNC(-__DBL_MAX__,-EXP) != -__DBL_MAX__*__builtin_exp2(-EXP)) \
84 link_error(__LINE__); \
85 if (__builtin_##FUNC##l(__LDBL_MAX__,-EXP) != __LDBL_MAX__*__builtin_exp2l(-EXP)) \
86 link_error(__LINE__); \
87 if (__builtin_##FUNC##l(-__LDBL_MAX__,-EXP) != -__LDBL_MAX__*__builtin_exp2l(-EXP)) \
88 link_error(__LINE__); \
89 } while (0)
90
91 void __attribute__ ((__noinline__))
92 foo(float xf, double x, long double xl, int i, long l)
93 {
94 /* f(0.0, i) -> 0.0 and f(-0.0, i) -> -0.0. */
95 TESTIT (ldexp, 0.0, i, 0.0);
96 TESTIT (ldexp, -0.0, i, -0.0);
97 TESTIT (scalbn, 0.0, i, 0.0);
98 TESTIT (scalbn, -0.0, i, -0.0);
99 TESTIT (scalbln, 0.0, l, 0.0);
100 TESTIT (scalbln, -0.0, l, -0.0);
101
102 /* f(x,0) -> x. */
103 TESTIT2 (ldexp, x, 0, x);
104 TESTIT2 (scalbn, x, 0, x);
105 TESTIT2 (scalbln, x, 0, x);
106
107 /* f(Inf,i) -> Inf and f(NaN,i) -> NaN. */
108 TESTIT3 (ldexp, , inf, , i, isinf);
109 TESTIT3 (ldexp, -, inf, , i, isinf);
110 TESTIT3 (ldexp, , nan, "", i, isnan);
111 TESTIT3 (ldexp, -, nan, "", i, isnan);
112
113 TESTIT3 (scalbn, , inf, , i, isinf);
114 TESTIT3 (scalbn, -, inf, , i, isinf);
115 TESTIT3 (scalbn, , nan, "", i, isnan);
116 TESTIT3 (scalbn, -, nan, "", i, isnan);
117
118 TESTIT3 (scalbln, , inf, , i, isinf);
119 TESTIT3 (scalbln, -, inf, , i, isinf);
120 TESTIT3 (scalbln, , nan, "", i, isnan);
121 TESTIT3 (scalbln, -, nan, "", i, isnan);
122
123 /* Evaluate when both arguments are constant. */
124 TESTIT (ldexp, 5.0, 3, 40.0);
125 TESTIT (ldexp, -5.0, 3, -40.0);
126 TESTIT (ldexp, 5.0, -3, 0.625);
127 TESTIT (ldexp, -5.0, -3, -0.625);
128
129 TESTIT (ldexp, 1000.0, 5, 32000.0);
130 TESTIT (ldexp, -1000.0, 5, -32000.0);
131 TESTIT (ldexp, 1000.0, -5, 31.25);
132 TESTIT (ldexp, -1000.0, -5, -31.25);
133
134 /* f(x,N) -> x*exp2(N), using MIN/MAX constants for x and constant N. */
135 TESTIT4 (ldexp, 1);
136 TESTIT4 (ldexp, 2);
137 TESTIT4 (ldexp, 3);
138 TESTIT4 (ldexp, 5);
139 TESTIT4 (ldexp, 9);
140 TESTIT4 (ldexp, 10);
141 TESTIT4 (ldexp, 12);
142 TESTIT4 (ldexp, 18);
143 TESTIT4 (ldexp, 25);
144 TESTIT4 (ldexp, 50);
145 TESTIT4 (ldexp, 75);
146 TESTIT4 (ldexp, 100);
147 TESTIT4 (ldexp, 123);
148
149 /* These are folded when float radix is two. */
150 #if __FLT_RADIX__ == 2
151 TESTIT (scalbn, 5.0, 3, 40.0);
152 TESTIT (scalbn, -5.0, 3, -40.0);
153 TESTIT (scalbn, 5.0, -3, 0.625);
154 TESTIT (scalbn, -5.0, -3, -0.625);
155
156 TESTIT (scalbn, 1000.0, 5, 32000.0);
157 TESTIT (scalbn, -1000.0, 5, -32000.0);
158 TESTIT (scalbn, 1000.0, -5, 31.25);
159 TESTIT (scalbn, -1000.0, -5, -31.25);
160
161 TESTIT4 (scalbn, 1);
162 TESTIT4 (scalbn, 2);
163 TESTIT4 (scalbn, 3);
164 TESTIT4 (scalbn, 5);
165 TESTIT4 (scalbn, 9);
166 TESTIT4 (scalbn, 10);
167 TESTIT4 (scalbn, 12);
168 TESTIT4 (scalbn, 18);
169 TESTIT4 (scalbn, 25);
170 TESTIT4 (scalbn, 50);
171 TESTIT4 (scalbn, 75);
172 TESTIT4 (scalbn, 100);
173 TESTIT4 (scalbn, 123);
174
175 TESTIT (scalbln, 5.0, 3, 40.0);
176 TESTIT (scalbln, -5.0, 3, -40.0);
177 TESTIT (scalbln, 5.0, -3, 0.625);
178 TESTIT (scalbln, -5.0, -3, -0.625);
179
180 TESTIT (scalbln, 1000.0, 5, 32000.0);
181 TESTIT (scalbln, -1000.0, 5, -32000.0);
182 TESTIT (scalbln, 1000.0, -5, 31.25);
183 TESTIT (scalbln, -1000.0, -5, -31.25);
184
185 TESTIT4 (scalbln, 1);
186 TESTIT4 (scalbln, 2);
187 TESTIT4 (scalbln, 3);
188 TESTIT4 (scalbln, 5);
189 TESTIT4 (scalbln, 9);
190 TESTIT4 (scalbln, 10);
191 TESTIT4 (scalbln, 12);
192 TESTIT4 (scalbln, 18);
193 TESTIT4 (scalbln, 25);
194 TESTIT4 (scalbln, 50);
195 TESTIT4 (scalbln, 75);
196 TESTIT4 (scalbln, 100);
197 TESTIT4 (scalbln, 123);
198 #endif
199 }
200
201 int main()
202 {
203 foo (0, 0, 0, 0, 0);
204
205 return 0;
206 }