diff options
Diffstat (limited to 'lib/msun/src')
| -rw-r--r-- | lib/msun/src/s_rintl.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/lib/msun/src/s_rintl.c b/lib/msun/src/s_rintl.c index 7f3b444e..b43df89 100644 --- a/lib/msun/src/s_rintl.c +++ b/lib/msun/src/s_rintl.c @@ -32,6 +32,11 @@ __FBSDID("$FreeBSD$"); #include "fpmath.h" +#if LDBL_MAX_EXP != 0x4000 +/* We also require the usual bias, min exp and expsign packing. */ +#error "Unsupported long double format" +#endif + #define BIAS (LDBL_MAX_EXP - 1) static const float @@ -50,16 +55,19 @@ long double rintl(long double x) { union IEEEl2bits u; - short sign; + uint32_t expsign; + int ex, sign; u.e = x; + expsign = u.xbits.expsign; + ex = expsign & 0x7fff; - if (u.bits.exp >= BIAS + LDBL_MANT_DIG - 1) { - if (u.bits.exp == BIAS + LDBL_MAX_EXP) + if (ex >= BIAS + LDBL_MANT_DIG - 1) { + if (ex == BIAS + LDBL_MAX_EXP) return (x + x); /* Inf, NaN, or unsupported format */ return (x); /* finite and already an integer */ } - sign = u.bits.sign; + sign = expsign >> 15; /* * The following code assumes that intermediate results are @@ -75,7 +83,7 @@ rintl(long double x) * If the result is +-0, then it must have the same sign as x, but * the above calculation doesn't always give this. Fix up the sign. */ - if (u.bits.exp < BIAS && x == 0.0L) + if (ex < BIAS && x == 0.0L) return (zero[sign]); return (x); |
