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-rw-r--r--src/stdio/vfprintf.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/stdio/vfprintf.c b/src/stdio/vfprintf.c
index 85701726..31c3d5dd 100644
--- a/src/stdio/vfprintf.c
+++ b/src/stdio/vfprintf.c
@@ -314,7 +314,7 @@ static int fmt_fp(FILE *f, long double y, int w, int p, int fl, int t)
}
while (e2<0) {
uint32_t carry=0, *b;
- int sh=MIN(9,-e2);
+ int sh=MIN(9,-e2), need=1+(p+LDBL_MANT_DIG/3+8)/9;
for (d=a; d<z; d++) {
uint32_t rm = *d & (1<<sh)-1;
*d = (*d>>sh) + carry;
@@ -324,7 +324,7 @@ static int fmt_fp(FILE *f, long double y, int w, int p, int fl, int t)
if (carry) *z++ = carry;
/* Avoid (slow!) computation past requested precision */
b = (t|32)=='f' ? r : a;
- if (z-b > 2+p/9) z = b+2+p/9;
+ if (z-b > need) z = b+need;
e2+=sh;
}