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#ifdef __GNUC__
# include <assert.h>
# include <fenv.h>
float castWithRounding(int rounding_mode, int value)
{
int returnValue = fesetround(rounding_mode);
assert(returnValue == 0);
return (float)value;
}
#endif
int main(void)
{
#ifdef __GNUC__
float low = 0x1p+25f; // 33554432
float high = 0x1.000002p+25f; // 33554436
float higher = 0x1.000004p+25f; // 33554440
// Constant folding tests
assert(castWithRounding(FE_TONEAREST, 33554432) == low);
assert(castWithRounding(FE_TONEAREST, 33554433) == low);
assert(castWithRounding(FE_TONEAREST, 33554434) == low); // Even is low
assert(castWithRounding(FE_TONEAREST, 33554435) == high);
assert(castWithRounding(FE_TONEAREST, 33554436) == high);
assert(castWithRounding(FE_TONEAREST, 33554437) == high);
assert(castWithRounding(FE_TONEAREST, 33554438) == higher); // Even is high
assert(castWithRounding(FE_TONEAREST, 33554439) == higher);
assert(castWithRounding(FE_TONEAREST, 33554440) == higher);
# ifdef FE_UPWARD
assert(castWithRounding(FE_UPWARD, 33554432) == low);
assert(castWithRounding(FE_UPWARD, 33554433) == high);
assert(castWithRounding(FE_UPWARD, 33554434) == high);
assert(castWithRounding(FE_UPWARD, 33554435) == high);
assert(castWithRounding(FE_UPWARD, 33554436) == high);
assert(castWithRounding(FE_UPWARD, -33554432) == -low);
assert(castWithRounding(FE_UPWARD, -33554433) == -low);
assert(castWithRounding(FE_UPWARD, -33554434) == -low);
assert(castWithRounding(FE_UPWARD, -33554435) == -low);
assert(castWithRounding(FE_UPWARD, -33554436) == -high);
# endif
# ifdef FE_DOWNWARD
assert(castWithRounding(FE_DOWNWARD, 33554432) == low);
assert(castWithRounding(FE_DOWNWARD, 33554433) == low);
assert(castWithRounding(FE_DOWNWARD, 33554434) == low);
assert(castWithRounding(FE_DOWNWARD, 33554435) == low);
assert(castWithRounding(FE_DOWNWARD, 33554436) == high);
assert(castWithRounding(FE_DOWNWARD, -33554432) == -low);
assert(castWithRounding(FE_DOWNWARD, -33554433) == -high);
assert(castWithRounding(FE_DOWNWARD, -33554434) == -high);
assert(castWithRounding(FE_DOWNWARD, -33554435) == -high);
assert(castWithRounding(FE_DOWNWARD, -33554436) == -high);
# endif
assert(castWithRounding(FE_TOWARDZERO, 33554432) == low);
assert(castWithRounding(FE_TOWARDZERO, 33554433) == low);
assert(castWithRounding(FE_TOWARDZERO, 33554434) == low);
assert(castWithRounding(FE_TOWARDZERO, 33554435) == low);
assert(castWithRounding(FE_TOWARDZERO, 33554436) == high);
assert(castWithRounding(FE_TOWARDZERO, -33554432) == -low);
assert(castWithRounding(FE_TOWARDZERO, -33554433) == -low);
assert(castWithRounding(FE_TOWARDZERO, -33554434) == -low);
assert(castWithRounding(FE_TOWARDZERO, -33554435) == -low);
assert(castWithRounding(FE_TOWARDZERO, -33554436) == -high);
#endif
}
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