math: use the rounding idiom consistently

[musl] / src / math / rintl.c

diff --git a/src/math/rintl.c b/src/math/rintl.c
index 2672507..374327d 100644 (file)
--- a/src/math/rintl.c
+++ b/src/math/rintl.c
@@ -6,11 +6,9 @@ long double rintl(long double x)
        return rint(x);
 }
 #elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
-#if LDBL_MANT_DIG == 64
-#define TOINT 0x1p63
-#elif LDBL_MANT_DIG == 113
-#define TOINT 0x1p112
-#endif
+
+static const long double toint = 1/LDBL_EPSILON;
+
 long double rintl(long double x)
 {
        union ldshape u = {x};
@@ -21,9 +19,9 @@ long double rintl(long double x)
        if (e >= 0x3fff+LDBL_MANT_DIG-1)
                return x;
        if (s)
-               y = x - TOINT + TOINT;
+               y = x - toint + toint;
        else
-               y = x + TOINT - TOINT;
+               y = x + toint - toint;
        if (y == 0)
                return 0*x;
        return y;