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/*
* Copyright 2023 Siemens
*
* The authors hereby grant permission to use, copy, modify, distribute,
* and license this software and its documentation for any purpose, provided
* that existing copyright notices are retained in all copies and that this
* notice is included verbatim in any distributions. No written agreement,
* license, or royalty fee is required for any of the authorized uses.
* Modifications to this software may be copyrighted by their authors
* and need not follow the licensing terms described here, provided that
* the new terms are clearly indicated on the first page of each file where
* they apply.
*/
/*
* ====================================================
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
*
* Developed at SunPro, a Sun Microsystems, Inc. business.
* Permission to use, copy, modify, and distribute this
* software is freely granted, provided that this notice
* is preserved.
* ====================================================
*/
/* Based on newlib/libm/mathfp/s_asinh.c in Newlib. */
#include "amdgcnmach.h"
v64df v64df_log_aux (v64df, v64di);
v64df v64df_log1p_aux (v64df, v64di);
v64df v64df_sqrt_aux (v64df, v64di);
#if defined (__has_builtin) && __has_builtin (__builtin_gcn_fabsv)
DEF_VD_MATH_FUNC (v64df, asinh, v64df x)
{
static const double one = 1.00000000000000000000e+00; /* 0x3FF00000, 0x00000000 */
static const double ln2 = 6.93147180559945286227e-01; /* 0x3FE62E42, 0xFEFA39EF */
static const double huge = 1.00000000000000000000e+300;
FUNCTION_INIT (v64df);
v64df w;
v64si hx;
GET_HIGH_WORD (hx, x, NO_COND);
v64si ix = hx & 0x7fffffff;
VECTOR_IF (ix >=0x7ff00000, cond) /* x is inf or NaN */
VECTOR_RETURN (x + x, cond);
VECTOR_ENDIF
VECTOR_IF (ix < 0x3e300000, cond) /* |x|<2**-28 */
VECTOR_IF2 (__builtin_convertvector(huge+x > one, v64si), cond2, cond) /* return x inexact except 0 */
VECTOR_RETURN (x, cond);
VECTOR_ENDIF
VECTOR_ENDIF
VECTOR_IF (ix > 0x41b00000, cond) /* x > 2**28 */
VECTOR_COND_MOVE (w, v64df_log_aux (__builtin_gcn_fabsv (x), __mask) + ln2,
cond);
VECTOR_ELSEIF (ix > 0x40000000, cond) /* 2**28 > |x| > 2.0 */
v64df t = __builtin_gcn_fabsv (x);
VECTOR_COND_MOVE (w, v64df_log_aux (2.0 * t + one / (v64df_sqrt_aux (x*x + one, __mask) + t), __mask),
cond);
VECTOR_ELSE (cond) /* 2.0 > |x| > 2**-28 */
v64df t = x * x;
VECTOR_COND_MOVE (w, v64df_log1p_aux (__builtin_gcn_fabsv (x) + t / (one + v64df_sqrt_aux (one + t, __mask)), __mask),
cond);
VECTOR_ENDIF
VECTOR_IF (hx > 0, cond)
VECTOR_RETURN (w, cond);
VECTOR_ELSE (cond)
VECTOR_RETURN (-w, cond);
VECTOR_ENDIF
FUNCTION_RETURN;
}
DEF_VARIANTS (asinh, df, df)
#endif
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