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Diffstat (limited to 'newlib/libm/machine/spu/headers/logbf4.h')
| -rw-r--r-- | newlib/libm/machine/spu/headers/logbf4.h | 98 |
1 files changed, 0 insertions, 98 deletions
diff --git a/newlib/libm/machine/spu/headers/logbf4.h b/newlib/libm/machine/spu/headers/logbf4.h deleted file mode 100644 index 6b5321cac..000000000 --- a/newlib/libm/machine/spu/headers/logbf4.h +++ /dev/null @@ -1,98 +0,0 @@ -/* -------------------------------------------------------------- */ -/* (C)Copyright 2006,2008, */ -/* International Business Machines 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 name of IBM Corporation nor the names of its */ -/* 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. */ -/* -------------------------------------------------------------- */ -/* PROLOG END TAG zYx */ -#ifdef __SPU__ - -#ifndef _LOGBF4_H_ -#define _LOGBF4_H_ 1 - -#include <spu_intrinsics.h> -#include <vec_types.h> - -/* - * FUNCTION - * vector float _logbf4(vector float x) - * - * DESCRIPTION - * The _logbf4 function returns a vector float that contains the exponent - * of the corresponding elements of the input vector x. The exponent is - * defined by: - * x = frac * FLT_RADIX^exp, with frac in [1, FLT_RADIX). - * - * Special Cases: - * x = 0, result is undefined. - * x = NaN, result is NaN. - * x = infinity, +infinity is returned. - * - */ -static __inline vector float _logbf4(vector float x) -{ - vec_uint4 lzero = (vector unsigned int) {0, 0, 0, 0}; - vec_uint4 exp_mask = (vector unsigned int) {0xFF, 0xFF, 0xFF, 0xFF}; - vec_int4 exp_shift = (vector signed int) { -23, -23, -23, -23}; - vec_int4 exp_bias = (vector signed int) {-127, -127, -127, -127}; - vec_uint4 sign_mask = (vector unsigned int) {0x80000000, 0x80000000, - 0x80000000, 0x80000000}; - vec_uint4 linf = (vector unsigned int) {0x7F800000, 0x7F800000, - 0x7F800000, 0x7F800000}; - vec_uint4 lminf = (vector unsigned int) {0xFF800000, 0xFF800000, - 0xFF800000, 0xFF800000}; - vec_uint4 exp; - vec_uint4 xabs; - vec_float4 exp_unbias; - - - xabs = spu_andc((vec_uint4)x, sign_mask); - - exp = spu_and(spu_rlmask((vec_uint4)x, exp_shift), exp_mask); - exp_unbias = spu_convtf(spu_add((vec_int4)exp, exp_bias), 0); - - /* Zero */ - exp_unbias = spu_sel(exp_unbias, (vec_float4)lminf, (vec_uint4)spu_cmpeq(xabs, lzero)); - - /* NaN */ - exp_unbias = spu_sel(exp_unbias, x, (vec_uint4)spu_cmpgt(xabs, linf)); - - /* Infinite */ - exp_unbias = spu_sel(exp_unbias, (vec_float4)linf, (vec_uint4)spu_cmpeq(xabs, linf)); - - return (exp_unbias); -} - -#endif /* _LOGBF4_H_ */ - -#endif /* __SPU__ */ |