/*
 * Copyright (c) 2017-2019, NVIDIA CORPORATION.  All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

#include "mthdecls.h"

CMPLXFUNC_C(__mth_i_csqrt)
{
  CMPLXARGS_C;
  float a, x, y;

  a = hypotf(real, imag);
  if (a == 0) {
    x = 0;
    y = 0;
  } else if (real > 0) {
    x = sqrtf(0.5f * (a + real));
    y = 0.5 * (imag / x);
  } else {
    y = sqrtf(0.5f * (a - real));
    y = copysignf(y,imag);
    x = 0.5f * (imag / y);
  }
  CRETURN_F_F(x, y);
}