- if (e < 0x3fff - 1) {
- /* |x| < 0.5, up to 1.7ulp error */
- x = 0.5*log1pl(2*x + 2*x*x/(1-x));
+ if (e < 0x3ff - 1) {
+ if (e < 0x3ff - LDBL_MANT_DIG/2) {
+ /* handle underflow */
+ if (e == 0)
+ FORCE_EVAL((float)x);
+ } else {
+ /* |x| < 0.5, up to 1.7ulp error */
+ x = 0.5*log1pl(2*x + 2*x*x/(1-x));
+ }