83 lines
2.7 KiB
C
83 lines
2.7 KiB
C
/*
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* Copyright 2023 Siemens
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*
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* The authors hereby grant permission to use, copy, modify, distribute,
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* and license this software and its documentation for any purpose, provided
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* that existing copyright notices are retained in all copies and that this
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* notice is included verbatim in any distributions. No written agreement,
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* license, or royalty fee is required for any of the authorized uses.
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* Modifications to this software may be copyrighted by their authors
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* and need not follow the licensing terms described here, provided that
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* the new terms are clearly indicated on the first page of each file where
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* they apply.
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*/
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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/* Based on newlib/libm/mathfp/sf_asinh.c in Newlib. */
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#include "amdgcnmach.h"
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v64sf v64sf_logf_aux (v64sf, v64si);
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v64sf v64sf_log1pf_aux (v64sf, v64si);
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v64sf v64sf_sqrtf_aux (v64sf, v64si);
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#if defined (__has_builtin) && __has_builtin (__builtin_gcn_fabsvf)
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DEF_VS_MATH_FUNC (v64sf, asinhf, v64sf x)
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{
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static const float one = 1.0000000000e+00; /* 0x3F800000 */
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static const float ln2 = 6.9314718246e-01; /* 0x3f317218 */
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static const float huge = 1.0000000000e+30;
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FUNCTION_INIT (v64sf);
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v64sf w;
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v64si hx;
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GET_FLOAT_WORD (hx, x, NO_COND);
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v64si ix = hx & 0x7fffffff;
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VECTOR_IF (ix >=0x7f800000, cond) /* x is inf or NaN */
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VECTOR_RETURN (x + x, cond);
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VECTOR_ENDIF
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VECTOR_IF (ix < 0x31800000, cond) /* |x|<2**-28 */
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VECTOR_IF2 (huge+x > one, cond2, cond) /* return x inexact except 0 */
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VECTOR_RETURN (x, cond);
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VECTOR_ENDIF
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VECTOR_ENDIF
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VECTOR_IF (ix > 0x4d800000, cond) /* x > 2**28 */
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VECTOR_COND_MOVE (w, v64sf_logf_aux (__builtin_gcn_fabsvf (x), __mask) +
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ln2,
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cond);
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VECTOR_ELSEIF (ix > 0x40000000, cond) /* 2**28 > |x| > 2.0 */
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v64sf t = __builtin_gcn_fabsvf (x);
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VECTOR_COND_MOVE (w, v64sf_logf_aux (2.0f * t + 1.0f / (v64sf_sqrtf_aux (x*x + 1.0f, __mask) + t), __mask),
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cond);
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VECTOR_ELSE (cond) /* 2.0 > |x| > 2**-28 */
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v64sf t = x * x;
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VECTOR_COND_MOVE (w, v64sf_log1pf_aux (__builtin_gcn_fabsvf (x) + t / (1.0f + v64sf_sqrtf_aux (1.0f + t, __mask)), __mask),
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cond);
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VECTOR_ENDIF
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VECTOR_IF (hx > 0, cond)
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VECTOR_RETURN (w, cond);
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VECTOR_ELSE (cond)
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VECTOR_RETURN (-w, cond);
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VECTOR_ENDIF
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FUNCTION_RETURN;
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}
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DEF_VARIANTS (asinhf, sf, sf)
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#endif
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