On Tue, Jan 4, 2011 at 4:33 AM, Ian Lance Taylor <iant@xxxxxxxxxx> wrote: > raju goruganti <raju.goruganti@xxxxxxxxx> writes: > >> Just I want to know ,Whether the dafult for '-mtp' is soft or not? >> >> If yes ,Why it has been choosen as soft? >> >> I think mtp=cp15 is more efficient(I figured this out after some >> google -search). > > From the friendly manual: > > `-mtp=NAME' > Specify the access model for the thread local storage pointer. > The valid models are `soft', which generates calls to > `__aeabi_read_tp', `cp15', which fetches the thread pointer from > `cp15' directly (supported in the arm6k architecture), and `auto', > which uses the best available method for the selected processor. > The default setting is `auto'. > > Ian > Thank you for your reply, Yes,default is auto, and auto chooses soft in latest gcc.
