Viewing file:  pr32293.c (1.25 KB) -rw-r--r--
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/* { 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);;
}
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