avoid raising spurious division-by-zero exception in printf

[musl] / src / stdio / vfprintf.c

diff --git a/src/stdio/vfprintf.c b/src/stdio/vfprintf.c
index 6525938..4a2752b 100644 (file)
--- a/src/stdio/vfprintf.c
+++ b/src/stdio/vfprintf.c
@@ -200,7 +200,7 @@ static int fmt_fp(FILE *f, long double y, int w, int p, int fl, int t)
        char ebuf0[3*sizeof(int)], *ebuf=&ebuf0[3*sizeof(int)], *estr;
 
        pl=1;
-       if (y<0 || 1/y<0) {
+       if (signbit(y)) {
                y=-y;
        } else if (fl & MARK_POS) {
                prefix+=3;