prefer (uint)-1>>1 to ~((uint)1<<n), remove some unnecessary ()

[libm] / src / math / __fpclassifyl.c

diff --git a/src/math/__fpclassifyl.c b/src/math/__fpclassifyl.c
index c886e5a..a5ad36f 100644 (file)
--- a/src/math/__fpclassifyl.c
+++ b/src/math/__fpclassifyl.c
@@ -10,7 +10,7 @@ int __fpclassifyl(long double x)
        if (!e)
                return u.bits.m ? FP_SUBNORMAL : FP_ZERO;
        if (e == 0x7fff)
        if (!e)
                return u.bits.m ? FP_SUBNORMAL : FP_ZERO;
        if (e == 0x7fff)

-               return u.bits.m & ~((uint64_t)1<<63) ? FP_NAN : FP_INFINITE;
+               return u.bits.m & (uint64_t)-1>>1 ? FP_NAN : FP_INFINITE;

        return u.bits.m & (uint64_t)1<<63 ? FP_NORMAL : FP_NAN;
 }
 #elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384
        return u.bits.m & (uint64_t)1<<63 ? FP_NORMAL : FP_NAN;
 }
 #elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384