108 lines
3.0 KiB
C
108 lines
3.0 KiB
C
/*
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* Test floating-point environment access with <fenv.h> (C99).
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*/
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#pragma STDC FENV_ACCESS ON
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#include <fenv.h>
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#include <float.h>
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#include <stdio.h>
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int main(void) {
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double d;
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int i;
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fexcept_t excepts, excepts2 = {0};
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fenv_t env, env2;
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feholdexcept(&env);
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i = feclearexcept(0);
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if (i != 0) goto Fail;
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i = feclearexcept(FE_INEXACT);
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if (i != 0) goto Fail;
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i = feclearexcept(FE_ALL_EXCEPT);
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if (i != 0) goto Fail;
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d = 1.0;
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d /= 0.0;
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if (fetestexcept(FE_DIVBYZERO) != FE_DIVBYZERO)
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goto Fail;
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i = fegetexceptflag(&excepts, FE_ALL_EXCEPT);
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if (i != 0) goto Fail;
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excepts2 = excepts;
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i = feclearexcept(FE_ALL_EXCEPT);
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if (i != 0) goto Fail;
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if (fetestexcept(FE_ALL_EXCEPT) != 0)
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goto Fail;
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i = feraiseexcept(FE_INVALID | FE_UNDERFLOW);
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if (i != 0) goto Fail;
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i = fegetexceptflag(&excepts, FE_ALL_EXCEPT);
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if (i != 0) goto Fail;
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if (fetestexcept(FE_ALL_EXCEPT - FE_INEXACT)
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!= (FE_INVALID | FE_UNDERFLOW))
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goto Fail;
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i = fesetexceptflag(&excepts2, FE_DIVBYZERO);
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if (fetestexcept(FE_ALL_EXCEPT - FE_INEXACT)
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!= (FE_INVALID | FE_UNDERFLOW | FE_DIVBYZERO))
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goto Fail;
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i = fesetexceptflag(&excepts2, FE_ALL_EXCEPT);
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if (fetestexcept(FE_ALL_EXCEPT) != FE_DIVBYZERO)
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goto Fail;
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i = fetestexcept(0);
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if (i != 0) goto Fail;
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i = fesetround(FE_UPWARD);
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if (i != 0) goto Fail;
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i = fegetround();
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if (i != FE_UPWARD) goto Fail;
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if (FLT_ROUNDS != 2) goto Fail;
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i = fegetenv(&env);
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if (i != 0) goto Fail;
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i = fesetround(FE_DOWNWARD);
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if (i != 0) goto Fail;
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i = fegetround();
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if (i != FE_DOWNWARD) goto Fail;
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if (FLT_ROUNDS != 3) goto Fail;
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i = feclearexcept(FE_ALL_EXCEPT);
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if (i != 0) goto Fail;
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i = feholdexcept(&env2);
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if (i != 0) goto Fail;
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fesetenv(&env);
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if (i != 0) goto Fail;
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if (fegetround() != FE_UPWARD) goto Fail;
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if (fetestexcept(FE_ALL_EXCEPT) != FE_DIVBYZERO)
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goto Fail;
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fesetenv(&env2);
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if (i != 0) goto Fail;
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if (fegetround() != FE_DOWNWARD) goto Fail;
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i = feraiseexcept(FE_INVALID | FE_INEXACT);
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if (i != 0) goto Fail;
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feupdateenv(&env2);
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if (i != 0) goto Fail;
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if (fegetround() != FE_DOWNWARD) goto Fail;
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if (fetestexcept(FE_ALL_EXCEPT) != (FE_INVALID | FE_INEXACT))
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goto Fail;
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fesetenv(FE_DFL_ENV);
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if (i != 0) goto Fail;
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printf ("Passed Conformance Test c99fenv\n");
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return 0;
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Fail:
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printf ("Failed Conformance Test c99fenv\n");
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}
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