amd64/112222: 32-bit libc incorrectly converts some FP numbers

Peter Jeremy peterjeremy at
Sun Apr 29 05:40:13 UTC 2007

The following reply was made to PR amd64/112222; it has been noted by GNATS.

From: Peter Jeremy <peterjeremy at>
To: FreeBSD-gnats-submit at
Subject: Re: amd64/112222: 32-bit libc incorrectly converts some FP numbers
Date: Sun, 29 Apr 2007 15:33:04 +1000

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 On 2007-Apr-29 09:54:41 +1000, Peter Jeremy <peterjeremy at> =
 >	Further testing has localised the problem to dtoa(), though it is
 >	not yet clear whether the problem is in the source code, the
 >	compiler or the 32-bit cross-build part of buildworld.
 I've narrowed the problem down to the -msse2 that is in the version
 of Makefile.inc1 that I have.  I notice that this flag was removed
 in Makefile.inc1 v1.499.2.18.  Some manual experimenting with the
 CFLAGS implied by that Makefile suggests that the problem goes away
 with the newer Makefile.inc1.
 I will upgrade world and retry.
 Peter Jeremy
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