From: "Anastasios" <antonbachin@yahoo.com>
To: "" <musl@lists.openwall.com>
Subject: Bug report: strtod drops LSB
Date: Wed, 25 Sep 2019 09:32:35 -0500 [thread overview]
Message-ID: <ca099df7-a6a2-4c08-9a80-0502a16d1d25@getmailbird.com> (raw)
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Hello,
Consider this program, strtod.c:
#include <stdlib.h>
#include <stdio.h>
int main()
{
printf("%lf\n", strtod("283686952306183", NULL));
}
With current musl master from Git:
$ musl-gcc -static strtod.c -o a.musl
$ ./a.musl
283686952306176.000000
By comparison, with glibc:
$ gcc -static strtod.c -o a.glibc
$ ./a.glibc
283686952306183.000000
The correct binary representation of this float is
0x42f0203040506070
but musl strtod produces
0x42f0203040506000
i.e., it fails to set the LSB. I examined this while ruling out printf as the cause.
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next reply other threads:[~2019-09-25 14:32 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-25 14:32 Anastasios [this message]
2019-09-25 15:06 ` Szabolcs Nagy
2019-09-25 15:51 ` Rich Felker
2019-09-25 17:56 ` Anastasios
2019-09-25 18:11 ` Anastasios
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