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Diffstat (limited to 'newlib/libm/machine/spu/headers/ilogbf.h')
-rw-r--r-- | newlib/libm/machine/spu/headers/ilogbf.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/newlib/libm/machine/spu/headers/ilogbf.h b/newlib/libm/machine/spu/headers/ilogbf.h new file mode 100644 index 000000000..5c591f04f --- /dev/null +++ b/newlib/libm/machine/spu/headers/ilogbf.h @@ -0,0 +1,53 @@ +/* + (C) Copyright 2001,2006, + International Business Machines Corporation, + Sony Computer Entertainment, Incorporated, + Toshiba Corporation, + + All rights reserved. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are met: + + * Redistributions of source code must retain the above copyright notice, + this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + * Neither the names of the copyright holders nor the names of their + contributors may be used to endorse or promote products derived from this + software without specific prior written permission. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A + PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER + OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ +#ifndef _ILOGBF_H_ +#define _ILOGBF_H_ 1 + +#include <spu_intrinsics.h> +#include <limits.h> +#include <math.h> +#include "headers/vec_literal.h" + +/* Single precision floats do not support infinities and NANs, and + * denorms are treated as zero. + */ +static __inline int _ilogbf(float x) +{ + vec_uint4 v, exp; + + v = (vec_uint4)spu_promote(x, 0); + exp = spu_and(spu_rlmask(v, -23), 0xFF); + exp = spu_sel(spu_add(exp, -127), VEC_SPLAT_U32(FP_ILOGB0), spu_cmpeq(exp, 0)); + return (spu_extract((vec_int4)(exp), 0)); +} +#endif /* _ILOGBF_H_ */ |