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Diffstat (limited to 'newlib/libm/machine/spu/headers/ldexp.h')
-rw-r--r-- | newlib/libm/machine/spu/headers/ldexp.h | 83 |
1 files changed, 0 insertions, 83 deletions
diff --git a/newlib/libm/machine/spu/headers/ldexp.h b/newlib/libm/machine/spu/headers/ldexp.h deleted file mode 100644 index 811059c1d..000000000 --- a/newlib/libm/machine/spu/headers/ldexp.h +++ /dev/null @@ -1,83 +0,0 @@ -/* - (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 _LDEXP_H_ -#define _LDEXP_H_ 1 - -#include <spu_intrinsics.h> -#include "headers/vec_literal.h" - -/* ldexp computes x * 2^exp. This function variant computes the result - * and handles overflow, underflow, and denorms by breaking the problem - * into: - * exp = MAX(exp, -2044) - * exp = MIN(exp, 2046) - * e1 = exp / 2 - * e2 = exp - e1; - * x * 2^e1 * 2^e2 - */ -static __inline double _ldexp(double x, int exp) -{ - vec_int4 e, e1, e2; - vec_int4 min = VEC_SPLAT_S32(-2044); - vec_int4 max = VEC_SPLAT_S32(2046); - vec_uint4 cmp_min, cmp_max; - vec_uint4 shift = VEC_LITERAL(vec_uint4, 20, 32, 20, 32); - vec_double2 f1, f2; - vec_double2 in, out; - - in = spu_promote(x, 0); - e = spu_promote(exp, 0); - - /* Clamp the specified exponent to the range -2044 to 2046. - */ - cmp_min = spu_cmpgt(e, min); - cmp_max = spu_cmpgt(e, max); - e = spu_sel(min, e, cmp_min); - e = spu_sel(e, max, cmp_max); - - /* Generate the factors f1 = 2^e1 and f2 = 2^e2 - */ - e1 = spu_rlmaska(e, -1); - e2 = spu_sub(e, e1); - - f1 = (vec_double2)spu_sl(spu_add(e1, 1023), shift); - f2 = (vec_double2)spu_sl(spu_add(e2, 1023), shift); - - /* Compute the product x * 2^e1 * 2^e2 - */ - out = spu_mul(spu_mul(in, f1), f2); - - return (spu_extract(out, 0)); -} - -#endif /* _LDEXP_H_ */ |