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Diffstat (limited to 'newlib/libm/machine/spu/headers/floorf.h')
| -rw-r--r-- | newlib/libm/machine/spu/headers/floorf.h | 123 |
1 files changed, 0 insertions, 123 deletions
diff --git a/newlib/libm/machine/spu/headers/floorf.h b/newlib/libm/machine/spu/headers/floorf.h deleted file mode 100644 index e6cc0f89e..000000000 --- a/newlib/libm/machine/spu/headers/floorf.h +++ /dev/null @@ -1,123 +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 _FLOORF_H_ -#define _FLOORF_H_ 1 - -#include <spu_intrinsics.h> -#include "headers/vec_literal.h" - -/* - * FUNCTION - * float _floorf(float value) - * - * DESCRIPTION - * The _floorf routine round the input value "value" downwards to the - * nearest integer returning the result as a float. Two forms of the - * floor function are provided - full range and limited (integer) - * range. - * - * The full range form (default) provides floor computation on - * all IEEE floating point values. The floor of NANs remain NANs. - * The floor of denorms results in zero. - * - * The limited range form (selected by defining FLOOR_INTEGER_RANGE) - * compute ths floor of all floating-point values in the 32-bit - * signed integer range. Values outside this range get clamped. - */ - -static __inline float _floorf(float value) -{ -#ifdef FLOOR_INTEGER_RANGE - /* 32-BIT INTEGER DYNAMIC RANGE - */ - union { - float f; - signed int i; - unsigned int ui; - } bias; - - bias.f = value; - - /* If positive, bias the input value to truncate towards - * positive infinity, instead of zero. - */ - bias.ui = (unsigned int)(bias.i >> 31) & 0x3F7FFFFF; - value -= bias.f; - - /* Remove fraction bits by casting to an integer and back - * to a floating-point value. - */ - return ((float)((int)value)); - -#else /* !FLOOR_INTEGER_RANGE */ - /* FULL FLOATING-POINT RANGE - */ - vec_int4 exp, shift; - vec_uint4 mask, frac_mask, addend, insert, pos; - vec_float4 in, out; - - in = spu_promote(value, 0); - - /* This function generates the following component - * based upon the inputs. - * - * mask = bits of the input that need to be replaced. - * insert = value of the bits that need to be replaced - * addend = value to be added to perform function. - * - * These are applied as follows:. - * - * out = ((in & mask) | insert) + addend - */ - pos = spu_cmpgt((vec_int4)in, -1); - exp = spu_and(spu_rlmask((vec_int4)in, -23), 0xFF); - - shift = spu_sub(127, exp); - - frac_mask = spu_and(spu_rlmask(VEC_SPLAT_U32(0x7FFFFF), shift), - spu_cmpgt((vec_int4)shift, -31)); - - mask = spu_orc(frac_mask, spu_cmpgt(exp, 126)); - - addend = spu_andc(spu_andc(spu_add(mask, 1), pos), - spu_cmpeq(spu_and((vec_uint4)in, mask), 0)); - - insert = spu_andc(spu_andc(VEC_SPLAT_U32(0xBF800000), pos), - spu_cmpgt((vec_uint4)spu_add(exp, -1), 126)); - - out = (vec_float4)spu_add(spu_sel((vec_uint4)in, insert, mask), addend); - - return (spu_extract(out, 0)); -#endif /* FLOOR_INTEGER_RANGE */ -} -#endif /* _FLOORF_H_ */ |