So MeeGo is going to be hard-floart? That's surprising to learn that Maemo is actually soft flot, but could maybe account for the bits of sluggishness experienced? When I did a soft-float point port of debian for MIPS it had severe consequences on platform's performance compared to same SOCs with an FPU.
-Sivan On Thu, Aug 5, 2010 at 8:25 AM, Zhang, Austin <austin.zh...@intel.com> wrote: > So any concern on switch softfp to hard? Meanwhile, what compiler is being > used for Maemo 5 build? Does it support Neon naturally? > > And as you may know, so far, we had switch compiler to 4.5.0, so seemed it is > also time to change those flags. > > -----Original Message----- > From: meego-dev-boun...@meego.com [mailto:meego-dev-boun...@meego.com] On > Behalf Of Thiago Macieira > Sent: Thursday, August 05, 2010 12:09 PM > To: Development for the MeeGo Project (discussion list) > Subject: Re: [MeeGo-dev] ARM softfloat or hardfloat? > > On Wednesday 4. August 2010 20.15.35 Arjan van de Ven wrote: >> On 8/4/2010 2:36 PM, Jeremiah Foster wrote: >> > Hello, >> > >> > What is MeeGo planning to do with regards to ARM hardfloat or >> > softfloat? >> > What is the rationale behind the choice? >> > >> > Some background information here: >> > http://wiki.debian.org/ArmHardFloatPort >> > >> > Jeremiah >> >> it's my understanding that n900 supports hard float... so that's what >> we're using for the n900 builds... > > The N900 hardware (Cortex-A8) does support hard float. > > However, Maemo 5 builds with the Neon VFP but in soft-fp mode. That is, it > uses the hardware for manipulating the floating point values, but parameters > are passed in ARM GP registers. > > -- > Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org > Senior Product Manager - Nokia, Qt Development Frameworks > PGP/GPG: 0x6EF45358; fingerprint: > E067 918B B660 DBD1 105C 966C 33F5 F005 6EF4 5358 > _______________________________________________ > MeeGo-dev mailing list > MeeGo-dev@meego.com > http://lists.meego.com/listinfo/meego-dev > _______________________________________________ MeeGo-dev mailing list MeeGo-dev@meego.com http://lists.meego.com/listinfo/meego-dev
