[444] | 1 | /* |
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| 2 | (C) Copyright 2001,2006, |
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| 3 | International Business Machines Corporation, |
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| 4 | Sony Computer Entertainment, Incorporated, |
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| 5 | Toshiba Corporation, |
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| 6 | |
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| 7 | All rights reserved. |
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| 8 | |
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| 9 | Redistribution and use in source and binary forms, with or without |
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| 10 | modification, are permitted provided that the following conditions are met: |
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| 11 | |
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| 12 | * Redistributions of source code must retain the above copyright notice, |
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| 13 | this list of conditions and the following disclaimer. |
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| 14 | * Redistributions in binary form must reproduce the above copyright |
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| 15 | notice, this list of conditions and the following disclaimer in the |
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| 16 | documentation and/or other materials provided with the distribution. |
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| 17 | * Neither the names of the copyright holders nor the names of their |
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| 18 | contributors may be used to endorse or promote products derived from this |
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| 19 | software without specific prior written permission. |
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| 20 | |
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| 21 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
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| 22 | IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
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| 23 | TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
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| 24 | PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER |
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| 25 | OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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| 26 | EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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| 27 | PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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| 28 | PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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| 29 | LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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| 30 | NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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| 31 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 32 | */ |
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| 33 | #ifndef _LRINT_H_ |
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| 34 | #define _LRINT_H_ 1 |
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| 35 | |
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| 36 | #include <spu_intrinsics.h> |
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| 37 | #include "headers/vec_literal.h" |
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| 38 | |
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| 39 | /* Round the input to the nearest integer according to the current |
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| 40 | * rounding mode. |
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| 41 | */ |
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| 42 | static __inline long int _lrint(double x) |
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| 43 | { |
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| 44 | vec_int4 out, sign; |
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| 45 | vec_double2 in, addend; |
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| 46 | |
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| 47 | in = spu_promote(x, 0); |
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| 48 | |
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| 49 | /* Add 2^53 affect a round to be performed by the hardware. |
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| 50 | */ |
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| 51 | addend = spu_sel((vec_double2)(VEC_SPLAT_U64(0x4330000000000000ULL)), |
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| 52 | in, VEC_SPLAT_U64(0x8000000000000000ULL)); |
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| 53 | out = (vec_int4)spu_rlqwbyte(spu_add(in, addend), 4); |
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| 54 | |
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| 55 | /* Correct the output sign. |
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| 56 | */ |
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| 57 | sign = spu_rlmaska((vec_int4)in, -31); |
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| 58 | |
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| 59 | out = spu_sub(spu_xor(out, sign), sign); |
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| 60 | |
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| 61 | return ((long int)spu_extract(out, 0)); |
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| 62 | } |
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| 63 | #endif /* _LRINT_H_ */ |
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