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annotate libquadmath/math/rintq.c @ 68:561a7518be6b

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update gcc-4.6
author Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
date Sun, 21 Aug 2011 07:07:55 +0900
parents
children 04ced10e8804
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rev   line source
68
561a7518be6b update gcc-4.6
Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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1 /* s_rintl.c -- long double version of s_rint.c.
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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2 * Conversion to IEEE quad long double by Jakub Jelinek, jj@ultra.linux.cz.
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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3 */
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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4
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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5 /*
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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6 * ====================================================
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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7 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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8 *
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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9 * Developed at SunPro, a Sun Microsystems, Inc. business.
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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10 * Permission to use, copy, modify, and distribute this
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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11 * software is freely granted, provided that this notice
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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12 * is preserved.
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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13 * ====================================================
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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14 */
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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15
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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16 #include "quadmath-imp.h"
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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17
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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18 static const __float128
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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19 TWO112[2]={
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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20 5.19229685853482762853049632922009600E+33L, /* 0x406F000000000000, 0 */
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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21 -5.19229685853482762853049632922009600E+33L /* 0xC06F000000000000, 0 */
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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22 };
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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23
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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24 __float128
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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25 rintq (__float128 x)
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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26 {
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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27 int64_t i0,j0,sx;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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28 uint64_t i,i1;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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29 __float128 w,t;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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30 GET_FLT128_WORDS64(i0,i1,x);
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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31 sx = (((uint64_t)i0)>>63);
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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32 j0 = ((i0>>48)&0x7fff)-0x3fff;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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33 if(j0<48) {
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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34 if(j0<0) {
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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35 if(((i0&0x7fffffffffffffffLL)|i1)==0) return x;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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36 i1 |= (i0&0x0000ffffffffffffLL);
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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37 i0 &= 0xffffe00000000000ULL;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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38 i0 |= ((i1|-i1)>>16)&0x0000800000000000LL;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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39 SET_FLT128_MSW64(x,i0);
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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40 w = TWO112[sx]+x;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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41 t = w-TWO112[sx];
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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42 GET_FLT128_MSW64(i0,t);
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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43 SET_FLT128_MSW64(t,(i0&0x7fffffffffffffffLL)|(sx<<63));
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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44 return t;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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45 } else {
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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46 i = (0x0000ffffffffffffLL)>>j0;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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47 if(((i0&i)|i1)==0) return x; /* x is integral */
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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48 i>>=1;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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49 if(((i0&i)|i1)!=0) {
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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50 if(j0==47) i1 = 0x4000000000000000ULL; else
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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51 i0 = (i0&(~i))|((0x0000200000000000LL)>>j0);
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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52 }
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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53 }
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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54 } else if (j0>111) {
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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55 if(j0==0x4000) return x+x; /* inf or NaN */
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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56 else return x; /* x is integral */
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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57 } else {
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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58 i = -1ULL>>(j0-48);
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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59 if((i1&i)==0) return x; /* x is integral */
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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60 i>>=1;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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61 if((i1&i)!=0) i1 = (i1&(~i))|((0x4000000000000000LL)>>(j0-48));
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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62 }
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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63 SET_FLT128_WORDS64(x,i0,i1);
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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64 w = TWO112[sx]+x;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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65 return w-TWO112[sx];
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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66 }