Hi Andrew, Thanks for your idea, I have found the reason. the reason is debug symbols, I need to either run strip command or i can verify size by gcc-size command to check text section reduction. Best Regards Naveen On Mon, Aug 10, 2009 at 10:18 PM, Andrew Haley<aph@xxxxxxxxxx> wrote: > naveen yadav wrote: >> Hi Andrew, >> >> >> I want to know in which cases size of binary or .o file increase by >> enabling -mthumb mode. >> >> I have observed in one open source program iozone. i found that if i >> pass -mthumb option size of binary increases. >> >> I do not understand why .. >> >> will you pls help > > Sure, I'll be glad to but you have to help too. As in, what is the file, > and what are the differences in the assembly language source. > > You have the answers, but I don't. > >> On Mon, Aug 10, 2009 at 9:51 PM, Andrew Haley<aph@xxxxxxxxxx> wrote: >>> naveen yadav wrote: >>> >>>> we have observed few points, >>>> >>>> 1. In Some cases size of .o file increase in thumb mode. when i >>>> dissamble it i found all instruction are 16 bit.In what cases size increases? >>> Did you not find out by looking at gcc's output? What did you >>> see? >>> >>>> 2. How much size will be reduce as compared with ARM mode.? >>>> 3. Code reduction depends on what ? >>>> >>>> 4. How much performance effect with Arm and Thumb mode. >>> See www.arm.com/pdfs/Thumb-2CoreTechnologyWhitepaper-Final4.pdf >>> >>> Andrew. >>> >>> > >
