diff options
Diffstat (limited to 'newlib/libm/machine/spu/headers/scalbnf4.h')
| -rw-r--r-- | newlib/libm/machine/spu/headers/scalbnf4.h | 101 |
1 files changed, 0 insertions, 101 deletions
diff --git a/newlib/libm/machine/spu/headers/scalbnf4.h b/newlib/libm/machine/spu/headers/scalbnf4.h deleted file mode 100644 index 32b733993..000000000 --- a/newlib/libm/machine/spu/headers/scalbnf4.h +++ /dev/null @@ -1,101 +0,0 @@ -/* -------------------------------------------------------------- */ -/* (C)Copyright 2006,2008, */ -/* 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 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 _SCALBNF4_H_ -#define _SCALBNF4_H_ 1 - -#include <spu_intrinsics.h> - -/* - * FUNCTION - * vector float _scalbnf4(vector float x, vector signed int exp) - * - * DESCRIPTION - * The _scalbnf4 function returns a vector containing each element of x - * multiplied by 2^n computed efficiently. This function is computed - * without the assistance of any floating point operations and as such - * does not set any floating point exceptions. - * - * Special Cases: - * - if the exponent is 0, then x is either 0 or a subnormal, and the - * result will be returned as 0. - * - if the result if underflows, it will be returned as 0. - * - if the result overflows, it will be returned as FLT_MAX. - * - */ -static __inline vector float _scalbnf4(vector float x, vector signed int exp) -{ - vec_int4 x_exp; - vec_uint4 zero; - vec_uint4 overflow; - vec_uint4 exp_mask = (vec_uint4)spu_splats(0x7F800000); - vec_float4 out; - - /* Extract exponent from x. If the exponent is 0, then - * x is either 0 or a denorm and x*2^exp is a zero. - */ - x_exp = spu_and(spu_rlmask((vec_int4)x, -23), 0xFF); - zero = spu_cmpeq(x_exp, 0); - - /* Compute the expected exponent and determine if the - * result is within range. - */ - x_exp = spu_add(exp, x_exp); - - /* Check for zero or overflow of result. - * Note: set high bit of flags = 0, since we have to - * return -0 when x = -0 - */ - zero = spu_rlmask(spu_orc(zero, spu_cmpgt(x_exp, 0)), -1); - overflow = spu_rlmask(spu_cmpgt(x_exp, 255), -1); - - /* Merge the expect exponent with x's mantissa. Zero the - * result if underflow and force to max if overflow. - */ - out = spu_sel(x, (vec_float4)spu_rl(x_exp, 23), exp_mask); - out = spu_andc(out, (vec_float4)zero); - out = spu_or(out, (vec_float4)overflow); - - return out; -} - -#endif /* _SCALBNF4_H_ */ -#endif /* __SPU__ */ |