disallow subtraction/negation of error

2019-10-21 02:31:18 -04:00
parent c05a402b72
commit 581a8e26f1
1 changed files with 3 additions and 0 deletions
--- a/src/decn/decn.c
+++ b/src/decn/decn.c
@ -406,6 +406,9 @@ void negate_decn(dec80* x){
 #else
 	static const exp_t xor_val = -(0x7f) - 1;
 #endif
+	if (decn_is_nan(x)){
+		return;
+	}
 	(x->exponent) ^= xor_val;
 }