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/*
* ====================================================
* 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)
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