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111
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1 /* { dg-do compile } */
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2 /* { dg-options "-O2" } */
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3
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4 unsigned int _IDEC_glbround;
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5 unsigned int _IDEC_glbflags;
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6 typedef unsigned UINT32;
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7 typedef signed SINT32;
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8 typedef unsigned long long UINT64;
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9 typedef signed long long SINT64;
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10 typedef
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11 __attribute__ ((aligned(16)))
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12 struct {
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13 UINT64 w[2];
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14 } UINT128;
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15
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16 static __inline UINT64
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17 unpack_BID128 (UINT64 * psign_x, int *pexponent_x,
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18 UINT128 * pcoefficient_x, UINT128 * px) {
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19 UINT128 coeff;
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20 UINT64 ex;
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21 *psign_x = (px->w[1]) & 0x8000000000000000ull;
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22 ex = (px->w[1]) >> 49;
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23 *pexponent_x = ((int) ex) & 0x3fff;
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24 return coeff.w[0] | coeff.w[1];
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25 }
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26
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27 static __inline UINT32
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28 get_BID32 (UINT32 sgn, int expon, UINT64 coeff, int rmode,
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29 unsigned *fpsc) {
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30 UINT32 r;
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31
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32 if (((unsigned) expon) > 191) {
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33 r = sgn | 0x78000000ul;
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34 switch (rmode) {
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35 case 0x00002:
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36 if (sgn)
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37 r = sgn | 0x77f8967f;
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38 }
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39 return r;
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40 }
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41 r = expon;
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42 return r;
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43 }
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44
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45 UINT32
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46 bid128_to_bid32 (UINT128 x)
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47 {
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48 UINT128 *px;
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49 UINT128 CX;
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50 UINT64 sign_x;
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51 UINT32 res;
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52 int exponent_x = 0;
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53 px = &x;
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54 if (!unpack_BID128 (&sign_x, &exponent_x, &CX, px)) {
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55 return(res);
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56 }
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57 res = get_BID32 ((UINT32) (sign_x >> 32),
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58 exponent_x, CX.w[0], _IDEC_glbround, &_IDEC_glbflags);
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59 return(res);;
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60 }
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61
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