Date: Sat, 15 Sep 2012 14:48:09 +0200 From: Roman Divacky <rdivacky@freebsd.org> To: Steve Kargl <sgk@troutmask.apl.washington.edu> Cc: Ian Lepore <freebsd@damnhippie.dyndns.org>, current@freebsd.org, Dimitry Andric <dim@freebsd.org>, toolchain@freebsd.org, Tijl Coosemans <tijl@coosemans.org> Subject: Re: Clang as default compiler November 4th Message-ID: <20120915124809.GA10939@freebsd.org> In-Reply-To: <20120915010600.GA70426@troutmask.apl.washington.edu> References: <504F4645.4070900@FreeBSD.org> <504F4A6B.4010001@coosemans.org> <504F5101.8090906@FreeBSD.org> <505101C3.70203@freebsd.org> <20120913020833.GA8255@troutmask.apl.washington.edu> <1347550332.1110.108.camel@revolution.hippie.lan> <20120913161024.GA13846@troutmask.apl.washington.edu> <20120914202319.GB5244@lor.one-eyed-alien.net> <20120915001808.GA70215@troutmask.apl.washington.edu> <20120915010600.GA70426@troutmask.apl.washington.edu>
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Fwiw, this seems to have been fixed as of a few minutes ago. http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20120910/150720.html Steve, can you please test llvm/clang from (their) svn and report back? We can import a newer snapshot if all is ok. Thank you. On Fri, Sep 14, 2012 at 06:06:00PM -0700, Steve Kargl wrote: > On Fri, Sep 14, 2012 at 05:18:08PM -0700, Steve Kargl wrote: > > > > A third class of failure appears to be that clang emits > > i387 fpu instructions for at least sinf and cosf instead > > of calls to the library routines. AFAIK, the library > > routines are faster and more accurate. > > > > Yep. Clang has problems with at least sinf on i386 FreeBSD. > > % pwd > /usr/home/kargl/trunk/math/sine > > % make clean && make CC=cc testf > cc -o testf -O2 -pipe -static -I/usr/local/include -I../mp testf.c \ > -L/usr/local/lib -L../mp -lsgk -lmpfr -lgmp -lm > > % ./testf -m 0 -M 1e20 -r > ULP Range | > -----------+------------------------- > [0.0:0.6] | 1006424 (100.00%) > (0.6:0.7] | 0 ( 0.00%) > (0.7:0.8] | 0 ( 0.00%) > (0.8:0.9] | 0 ( 0.00%) > (0.9:1.0] | 0 ( 0.00%) > (1.0:2.0] | 0 ( 0.00%) > (2.0:3.0] | 0 ( 0.00%) > 3.0 < ULP | 0 ( 0.00%) > -----------+------------------------- > Count | 1006424 > Max ULP | 0.50084 > Max ULP x | 53462490661259313152.000000 0x1.72f876p+65 > > % make clean && make CC=clang testf > clang -o testf -O2 -pipe -static -I/usr/local/include -I../mp testf.c \ > -L/usr/local/lib -L../mp -lsgk -lmpfr -lgmp -lm > > % ./testf -m 0 -M 1e20 -r > ULP Range | > -----------+------------------------- > [0.0:0.6] | 1 ( 0.00%) > (0.6:0.7] | 0 ( 0.00%) > (0.7:0.8] | 0 ( 0.00%) > (0.8:0.9] | 0 ( 0.00%) > (0.9:1.0] | 0 ( 0.00%) > (1.0:2.0] | 0 ( 0.00%) > (2.0:3.0] | 0 ( 0.00%) > 3.0 < ULP | 999998 (100.00%) > -----------+------------------------- > Count | 999999 > Max ULP | 1328505256679420125050194353979392.00000 > Max ULP x | 75516780764213542912.000000 0x1.06006p+66 > > -- > Steve > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"
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