fix long double const workaround in cbrtl

diff --git a/src/math/cbrtl.c b/src/math/cbrtl.c
index d138b9f2f1cce4dc57ce0341dbf171eb6c831c8b..5297d68feb0c19eb197ad7787d44aee4c0ac5485 100644 (file)
--- a/src/math/cbrtl.c
+++ b/src/math/cbrtl.c
@@ -118,11 +118,7 @@ long double cbrtl(long double x)
         * Round it away from zero to 32 bits (32 so that t*t is exact, and
         * away from zero for technical reasons).
         */
-       volatile double vd2 = 0x1.0p32;
-       volatile double vd1 = 0x1.0p-31;
-       #define vd ((long double)vd2 + vd1)
-
-       t = dt + vd - 0x1.0p32;
+       t = dt + (0x1.0p32L + 0x1.0p-32L) - 0x1.0p32;
 #elif LDBL_MANT_DIG == 113
        /*
         * Round dt away from zero to 47 bits.  Since we don't trust the 47,