Writing Efficient C for ARM

The ARM and Thumb C compilers are mature, industrial-strength ANSI C compilers whichare capable of producing high quality machine code. However, when writing source code,it is always worthwhile to use programming techniques which work well on RISCprocessors such as ARM. This Applicat ion Note describes some of the techniques thatcan be useful. It also explains to some extent how the ARM compiler works, and how touse the C language efficiently. These techniques and knowledge will enable programmersto increase execution speed and/or lower code density. ion Note describes some of the techniques thatcan be useful. It also explains to some extent how the ARM compiler works, and how touse the C language efficiently. These techniques and knowledge will enable programmersto increase execution speed and/or lower code density.