| /* |
| (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 _LLRINT_H_ |
| #define _LLRINT_H_ 1 |
| |
| #include <spu_intrinsics.h> |
| #include "headers/vec_literal.h" |
| |
| static __inline long long int _llrint(double x) |
| { |
| int shift; |
| vec_int4 exp; |
| vec_uint4 mant, sign, mask, borrow; |
| vec_double2 in, bias; |
| |
| in = spu_promote(x, 0); |
| |
| /* Round the input according to the current rounding mode. |
| */ |
| bias = spu_sel((vec_double2)(VEC_SPLAT_U64(0x4330000000000000ULL)), in, |
| VEC_SPLAT_U64(0x8000000000000000ULL)); |
| mant = (vec_uint4)(spu_sub(spu_add(in, bias), bias)); |
| |
| /* Determine how many bits to shift the mantissa to correctly |
| * align it into long long element 0. |
| */ |
| exp = spu_and(spu_rlmask((vec_int4)mant, -20), 0x7FF); |
| exp = spu_add(exp, -1011); |
| shift = spu_extract(exp, 0); |
| |
| mask = spu_cmpgt(exp, 0); |
| mask = (vec_uint4)spu_maskw(spu_extract(mask, 0)); |
| |
| /* Algn mantissa bits |
| */ |
| mant = spu_sel(spu_rlmaskqwbyte(mant, -8), VEC_SPLAT_U32(0x00100000), |
| VEC_LITERAL(vec_uint4, 0,0,0xFFF00000,0)); |
| |
| mant = spu_and(spu_slqwbytebc(spu_slqw(mant, shift), shift), mask); |
| |
| /* Compute the two's complement of the mantissa if the |
| * input is negative. |
| */ |
| sign = spu_maskw(spu_extract(spu_rlmaska((vec_int4)in, -31), 0)); |
| |
| mant = spu_xor(mant, sign); |
| borrow = spu_genb(mant, sign); |
| borrow = spu_shuffle(borrow, borrow, |
| VEC_LITERAL(vec_uchar16, 4,5,6,7, 192,192,192,192, |
| 4,5,6,7, 192,192,192,192)); |
| mant = spu_subx(mant, sign, borrow); |
| |
| return (spu_extract((vec_llong2)(mant), 0)); |
| } |
| #endif /* _LLRINT_H_ */ |