Tests for half.h

tests_half.cpp

#include <iostream>
#include "half.h"
#include "picotest.h"

TEST(arithm, half_float) {
  half abs_error(1e-2);
  EXPECT_EQ(half(7.2), std::abs(half(-7.2)));
  EXPECT_EQ(half(7.2), std::abs(half(7.2)));
  EXPECT_EQ(false, bool(half(0.0)));
  EXPECT_NEAR(half(8.602), half(7.238)+half(1.364),abs_error);
  EXPECT_NEAR(half(8.602), half(7.238)+half(1.364),abs_error);
  EXPECT_NEAR(half(5.874), half(7.238)-half(1.364),abs_error);
  EXPECT_NEAR(half(9.872632), half(7.238)*half(1.364),abs_error);
  EXPECT_NEAR(half(5.30645), half(7.238)/half(1.364),abs_error);
  EXPECT_EQ(5, int(half(5.0)));
  EXPECT_EQ(false, bool(half(0.0)));
  half x = 5.0;
  EXPECT_NEAR(half(5.0), x,abs_error);
  x+=1000.0;
  EXPECT_NEAR(double(1005.0), double(x),1e-2);
  x+=5000.0;
  EXPECT_NEAR(double(6005.0),double(x),1);
  x/=half(3000.0);
  EXPECT_NEAR(double(2.002),double(x),1e-2);
  half y(std::numeric_limits<float>::infinity()), z = half(1.0), w=half(0.0);
  EXPECT_EQ(true, y.isInfinity());
  EXPECT_EQ(true, x.isFinite());
  EXPECT_EQ(true, w.isZero());
  EXPECT_EQ(false, z.isNan());
  z=w/w;
  EXPECT_EQ(true, z.isNan());
  EXPECT_EQ(true, (-x).isNegative());
  EXPECT_EQ(true, half(5.0).isNormalized());
  EXPECT_EQ(true, half(0.00002).isDenormalized());
  EXPECT_EQ(0.654_h, half(0.654));
}

int main(void) {
  return RUN_ALL_TESTS();
}