testall2
testall2(atan2, 0.0, -0.0, pi, FE_INEXACT);
testall2(atan2, -0.0, -0.0, -pi, FE_INEXACT);
testall2(atan2, 0.0, 0.0, 0.0, 0);
testall2(atan2, -0.0, 0.0, -0.0, 0);
testall2(atan2, INFINITY, -INFINITY, c3pi / 4, FE_INEXACT);
testall2(atan2, -INFINITY, -INFINITY, -c3pi / 4, FE_INEXACT);
testall2(atan2, INFINITY, INFINITY, pi / 4, FE_INEXACT);
testall2(atan2, -INFINITY, INFINITY, -pi / 4, FE_INEXACT);
testall2(atan2, 1.0, 1.0, pi / 4, FE_INEXACT);
testall2(atan2, 1.0, -1.0, c3pi / 4, FE_INEXACT);
testall2(atan2, -1.0, 1.0, -pi / 4, FE_INEXACT);
testall2(atan2, -1.0, -1.0, -c3pi / 4, FE_INEXACT);