mirror of
git://sourceware.org/git/newlib-cygwin.git
synced 2025-01-23 23:47:22 +08:00
57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
|
/*
|
||
|
|
* 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_ilogb.c in Newlib. */
|
||
|
|
|
||
|
|
#include "amdgcnmach.h"
|
||
|
|
|
||
|
|
DEF_VS_MATH_FUNC (v64si, ilogbf, v64sf x)
|
||
|
|
{
|
||
|
|
FUNCTION_INIT(v64si);
|
||
|
|
|
||
|
|
v64si hx, ix;
|
||
|
|
GET_FLOAT_WORD (hx, x, NO_COND);
|
||
|
|
hx &= 0x7fffffff;
|
||
|
|
VECTOR_IF (FLT_UWORD_IS_ZERO (hx), cond)
|
||
|
|
VECTOR_RETURN (VECTOR_INIT (-__INT_MAX__), cond); // FP_ILOGB0
|
||
|
|
VECTOR_ENDIF
|
||
|
|
VECTOR_IF (FLT_UWORD_IS_SUBNORMAL (hx), cond)
|
||
|
|
ix = VECTOR_INIT (-126);
|
||
|
|
for (v64si i = (hx << 8);
|
||
|
|
!ALL_ZEROES_P (cond & (i > 0));
|
||
|
|
i <<= 1)
|
||
|
|
VECTOR_COND_MOVE (ix, ix - 1, cond & (i > 0));
|
||
|
|
VECTOR_RETURN (ix, cond);
|
||
|
|
VECTOR_ELSEIF (~FLT_UWORD_IS_FINITE (hx), cond)
|
||
|
|
VECTOR_RETURN (VECTOR_INIT (__INT_MAX__), cond);
|
||
|
|
VECTOR_ENDIF
|
||
|
|
|
||
|
|
VECTOR_RETURN ((hx >> 23) - 127, NO_COND);
|
||
|
|
|
||
|
|
FUNCTION_RETURN;
|
||
|
|
}
|
||
|
|
|
||
|
|
DEF_VARIANTS (ilogbf, si, sf)
|