newlib-cygwin/newlib/libm/machine/amdgcn/v64sf_modf.c

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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/common/sf_modf.c in Newlib. */
#include "amdgcnmach.h"
v64si v64sf_numtestf (v64sf);
DEF_VS_MATH_FUNC (v64sf, modff, v64sf x, v64sf *iptr)
{
FUNCTION_INIT (v64sf);
v64sf ret_i;
v64si i0;
GET_FLOAT_WORD (i0, x, NO_COND);
v64si j0 = ((i0 >> 23) & 0xff) - 0x7f; /* exponent of x */
v64sf zero;
SET_FLOAT_WORD (zero, i0 & 0x80000000,NO_COND);
VECTOR_IF (j0 < 23, cond) /* integer part in x*/
VECTOR_IF2 (j0 < 0, cond2, cond) /* |x|<1 */
VECTOR_COND_MOVE (ret_i, zero, cond2);
VECTOR_RETURN (x, cond2);
VECTOR_ELSE2 (cond2, cond)
v64si i = (0x007fffff) >> j0;
VECTOR_IF2 ((i0 & i) == 0, cond3, cond2) /* x is integral */
VECTOR_COND_MOVE (ret_i, x, cond3);
VECTOR_RETURN (zero, cond3);
VECTOR_ELSE2 (cond3, cond2)
SET_FLOAT_WORD (ret_i, i0 & ~i, cond3);
VECTOR_RETURN (x - ret_i, cond3);
VECTOR_ENDIF
VECTOR_ENDIF
VECTOR_ELSE (cond) /* no fraction part */
VECTOR_COND_MOVE (ret_i, x, cond);
VECTOR_IF2 (v64sf_numtestf (x) == NAN, cond2, cond)
VECTOR_COND_MOVE (ret_i, x + x, cond2);
VECTOR_RETURN (ret_i, cond2); /* x is NaN, return NaN */
VECTOR_ENDIF
VECTOR_RETURN (zero, cond); /* return +- 0 */
VECTOR_ENDIF
*iptr = ret_i;
FUNCTION_RETURN;
}