Subversion Repositories openrisc_2011-10-31

/* { dg-do compile } */

/* { dg-options "-O2" } */

unsigned int _IDEC_glbround;

unsigned int _IDEC_glbflags;

typedef unsigned UINT32;

typedef signed SINT32;

typedef unsigned long long UINT64;

typedef signed long long SINT64;

typedef

__attribute__ ((aligned(16)))

     struct {

       UINT64 w[2];

     } UINT128;

static __inline UINT64

unpack_BID128 (UINT64 * psign_x, int *pexponent_x,

        UINT128 * pcoefficient_x, UINT128 * px) {

  UINT128 coeff;

  UINT64 ex;

  *psign_x = (px->w[1]) & 0x8000000000000000ull;

  ex = (px->w[1]) >> 49;

  *pexponent_x = ((int) ex) & 0x3fff;

  return coeff.w[0] | coeff.w[1];

}

static __inline UINT32

get_BID32 (UINT32 sgn, int expon, UINT64 coeff, int rmode,

    unsigned *fpsc) {

  UINT32 r;

  if (((unsigned) expon) > 191) {

      r = sgn | 0x78000000ul;

      switch (rmode) {

      case 0x00002:

        if (sgn)

          r = sgn | 0x77f8967f;

      }

      return r;

  }

  r = expon;

  return r;

}

UINT32

bid128_to_bid32 (UINT128 x)

{

  UINT128 *px;

  UINT128 CX;

  UINT64 sign_x;

  UINT32 res;

  int exponent_x = 0;

  px = &x;

  if (!unpack_BID128 (&sign_x, &exponent_x, &CX, px)) {

      return(res);

  }

  res = get_BID32 ((UINT32) (sign_x >> 32),

        exponent_x, CX.w[0], _IDEC_glbround, &_IDEC_glbflags);

  return(res);;

}