• Thumb mode, Thumb2 MRS insturction issue.
    Note: This was originally posted on 28th July 2011 at http://forums.arm.com Dear All I have find a strange behavior on cortexA9/R4, My mode data code as below  0x0   0x8100F3EF    MRS R1,CPSR        ...
  • thumb
    Hello, I wrote a function which call another function through a pointer of function call. When I trace the call, as soon as I reach the function the thumb bit is cleared , and of course the program...
  • Why Thumb?
    I want to understand, why most (or all?) examples for MCP2100 (by the way very useful) are for the Thumb mode? The main resource of the LPC2129, which has not an external memory support, most attractive...
  • thumb instructions
    Hello, I want to write thumb codes in keil tool but i am getting errors,is there any initial settings we have to to before writing thumb instructions.
  • Thumb mode and ARM_common_call_via_r0
    Why does the compiler bother with the __ARM_common_call_via_r0 (_r1, _r2, etc.) functions? They end up being a Thumb instruction of "BX Rn", which is shorter than the call to get to this instruction...