diff options
Diffstat (limited to 'sysdeps/m68k/fpu/s_llrint.c')
| -rw-r--r-- | sysdeps/m68k/fpu/s_llrint.c | 48 |
1 files changed, 31 insertions, 17 deletions
diff --git a/sysdeps/m68k/fpu/s_llrint.c b/sysdeps/m68k/fpu/s_llrint.c index f5d0d51122..9dfee644ed 100644 --- a/sysdeps/m68k/fpu/s_llrint.c +++ b/sysdeps/m68k/fpu/s_llrint.c @@ -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; |