nano-vfprintf_float.c: Fix check if negative for nans.

2018-12-11 21:03:03 +00:00 · 2018-12-11 21:03:03 +00:00 · b3692aed5e
parent df6915f029
commit b3692aed5e
1 changed files with 2 additions and 1 deletions
--- a/newlib/libc/stdio/nano-vfprintf_float.c
+++ b/newlib/libc/stdio/nano-vfprintf_float.c
@ -39,6 +39,7 @@
 #include <string.h>
 #include <limits.h>
 #include <stdint.h>
+#include <math.h>
 #include <wchar.h>
 #include <sys/lock.h>
 #include <stdarg.h>
@ -213,7 +214,7 @@ _printf_float (struct _reent *data,
    }
  if (isnan (_fpvalue))
    {
-      if (_fpvalue < 0)
+      if (signbit (_fpvalue))
 	pdata->l_buf[0] = '-';
      if (code <= 'G')		/* 'A', 'E', 'F', or 'G'.  */
 	cp = "NAN";