Thanks for your feedback. I understand that there will be a performance drop if we go for soft-float.
On this site (http://blogs.arm.com/software-enablement/456-googles-v8-on-arm-five-times-better/), there is mention of V8 running without VFP (in the Crankshaft section). Is there any option to build V8 without vfp support? Even if it is only for developers, we would like to try and see if it meets with our performance requirements. Warm Regards, JK On Monday, August 5, 2013 6:58:47 PM UTC+8, Rodolph Perfetta wrote: > > Using library calls will force you to do a lot of push/pop/register > shuffling and the performance will be poor. That being said if you are > moving form a VFP soc to a non VFP soc you may not have an L2 cache either > in which case performance is going to be low anyway. > > HTH, > Rodolph. > > > On 5 August 2013 11:21, Ben Noordhuis <[email protected] > <javascript:>>wrote: > >> On Mon, Aug 5, 2013 at 12:07 PM, Rodolph Perfetta >> <[email protected] <javascript:>> wrote: >> > The question is does v8 work when there is no hardware floating point >> > present and the answer is no. >> > >> > softfp is the name of the abi which assumes hardware floating point but >> uses >> > integer result for function call. >> > >> > Nowadays a lot of software on ARM (all the ubuntu packages for example) >> are >> > compile for hardware floating point. >> >> Oh, I guess you're right - I think I misread VFP as VFP3 in the OP's post. >> >> @OP: softfloat (as opposed to softfp) is not supported. In theory, >> it'd be possible for V8 to emit library calls rather than VFP >> instructions but in practice it doesn't. Making it softfloat >> compatible would be a fair amount of work, I think. >> >> -- >> -- >> v8-users mailing list >> [email protected] <javascript:> >> http://groups.google.com/group/v8-users >> --- >> You received this message because you are subscribed to the Google Groups >> "v8-users" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:>. >> For more options, visit https://groups.google.com/groups/opt_out. >> >> >> > -- -- v8-users mailing list [email protected] http://groups.google.com/group/v8-users --- You received this message because you are subscribed to the Google Groups "v8-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
