On Mon, Aug 10, 2009 at 9:57 PM, naveen yadav<yad.naveen@xxxxxxxxx> 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 > > Best Regards > > > 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. >> >> >
