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125e39bfea
This implements a set of vectorized math routines to be used by the compiler auto-vectorizer. Versions for vectors with 2 lanes up to 64 lanes (in powers of 2) are provided. These routines are based on the scalar versions of the math routines in libm/common, libm/math and libm/mathfp. They make extensive use of the GCC C vector extensions and GCN-specific builtins in GCC.
67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
/*
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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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*/
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/* Based on newlib/libm/mathfp/ef_acosh.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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DEF_VS_MATH_FUNC (v64sf, acoshf, v64sf x)
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{
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static const float one = 1.0;
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static const float ln2 = 6.9314718246e-01; /* 0x3f317218 */
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FUNCTION_INIT (v64sf);
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v64si hx;
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GET_FLOAT_WORD (hx, x, NO_COND);
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VECTOR_IF (hx < 0x3f800000, cond) // x < 1 */
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VECTOR_RETURN ((x-x) / (x-x), cond);
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VECTOR_ENDIF
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VECTOR_IF (hx >=0x4d800000, cond) // x > 2**28 */
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VECTOR_IF2 (hx >=0x7f800000, cond2, cond) // x is inf of NaN */
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VECTOR_RETURN (x+x, cond2);
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VECTOR_ELSE (cond2)
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/* acosh(huge)=log(2x) */
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VECTOR_RETURN (v64sf_logf_aux (x, __mask) + ln2, cond2);
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VECTOR_ENDIF
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VECTOR_ENDIF
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VECTOR_IF (hx == 0x3f800000, cond)
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/* acosh(1) = 0 */
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VECTOR_RETURN (VECTOR_INIT (0.0f), cond);
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VECTOR_ENDIF
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VECTOR_IF (hx > 0x40000000, cond) /* 2**28 > x > 2 */
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{
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v64sf t = x * x;
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VECTOR_RETURN (v64sf_logf_aux (2.0f*x - 1.0f /
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(x + v64sf_sqrtf_aux (t - 1.0f, __mask)),
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__mask),
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cond);
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}
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VECTOR_ELSE (cond) /* 1<x<2 */
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{
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v64sf t = x - 1.0f;
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VECTOR_RETURN (v64sf_log1pf_aux (t + v64sf_sqrtf_aux(2.0*t + t*t, __mask),
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__mask),
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cond);
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}
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VECTOR_ENDIF
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FUNCTION_RETURN;
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}
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DEF_VARIANTS (acoshf, sf, sf)
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