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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