1  /*
 2   * Copyright (C) 2008-2020 Advanced Micro Devices, Inc. All rights reserved.
 3   *
 4   * Redistribution and use in source and binary forms, with or without modification,
 5   * are permitted provided that the following conditions are met:
 6   * 1. Redistributions of source code must retain the above copyright notice,
 7   *    this list of conditions and the following disclaimer.
 8   * 2. Redistributions in binary form must reproduce the above copyright notice,
 9   *    this list of conditions and the following disclaimer in the documentation
10   *    and/or other materials provided with the distribution.
11   * 3. Neither the name of the copyright holder nor the names of its contributors
12   *    may be used to endorse or promote products derived from this software without
13   *    specific prior written permission.
14   *
15   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
16   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18   * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
19   * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
20   * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
21   * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
22   * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
23   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24   * POSSIBILITY OF SUCH DAMAGE.
25   *
26   */
27  
28  #include "fn_macros.h"
29  #include "libm_util_amd.h"
30  #include "libm_special.h"
31  
32  /* Returns 0 if x is infinite or NaN, otherwise returns 1 */
33  
34  int FN_PROTOTYPE_REF(finitef)(float x)
35  {
36  
37    unsigned int ux,ax;
38    GET_BITS_SP32(x, ux);
39    ax = ux & (~SIGNBIT_SP32);
40    if (ax > 0x7f800000)
41      /* x is NaN */
42      #ifdef WINDOWS
43           return (int)__amd_handle_errorf("finitef", __amd_finite, 0, _DOMAIN, 0, EDOM, x, 0.0, 1);
44      #else
45           if(!(ax & 0x00400000)) //x is snan
46             return (int)__amd_handle_errorf("finitef", __amd_finite, 0, _DOMAIN, AMD_F_INVALID, EDOM, x, 0.0, 1);
47      #endif
48  
49    return (int)((ax - PINFBITPATT_SP32) >> 31);
50  
51  }
52  
53