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Make compilable and fix overflow condition.

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This commit is contained in:
Ulrich Drepper 1997-11-11 23:47:20 +00:00
parent 27157fb6a0
commit d391bc58dd
1 changed files with 31 additions and 17 deletions
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48
sysdeps/m68k/fpu/s_llrint.c
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@ -24,36 +24,50 @@
#include "math_private.h"
long long int
__llrint (long double x)
__llrint (double x)
{
int32_t se, sx;
u_int32_t h, l;
int32_t e;
u_int32_t h, l, s;
long long int result;
x = __m81_u(__rintl) (x);
x = __m81_u(__rint) (x);
/* We could use __fixxfdi from libgcc, but here we can take advantage of
the known floating point format. */
GET_LDOUBLE_WORDS (se, h, l, x);
EXTRACT_WORDS (h, l, x);
sx = se & (1 << 15);
se = (se ^ sx) - 0x3fff;
e = ((h >> 20) & 0x7ff) - 0x3ff;
if (e < 0)
return 0;
s = h;
h &= 0xfffff;
h |= 0x100000;
if (se < 64)
if (e < 63)
{
if (se > 31)
result = (((long long int) (h >> (63 - se)) << 32)
| (l >> (63 - se)) | (h << (se - 31)));
if (e > 52)
{
h <<= e - 52;
h |= l >> (84 - e);
l <<= e - 52;
result = ((long long int) h << 32) | l;
}
else if (e > 20)
{
l >>= 52 - e;
l |= h << (e - 20);
h >>= 52 - e;
result = ((long long int) h << 32) | l;
}
else
result = h >> (31 - se);
if (sx)
result = h >> (20 - e);
if (s & 0x80000000)
result = -result;
}
else
/* Too large. The number is either +-inf or NaN or it is too
large to be effected by rounding. The standard leaves it
undefined what to return when the number is too large to fit in
a `long long int'. */
/* The number is too large or not finite. The standard leaves it
undefined what to return when the number is too large to fit in a
`long long int'. */
result = -1LL;
return result;