Re: STM32 ARM toolset advice?


"Mark Borgerson" <mborgerson@xxxxxxxxxxx> wrote in message news:MPG.2355722479c1065e989919@xxxxxxxxxxxxxxxxxxxxxxxxx
In article <81ene4hsatqaphkmp01cikmpk9l7ana9qi@xxxxxxx>,
nobody@xxxxxxxxxxxxxxxx says...

Keil has been bought by ARM, and AFAIK they now use the compiler from
ARM. Apparently this compiler generates the best code for ARM's CPUs.
GCC Generates quite good code for the ARM these days. The biggest
drawback is the use of newlib. Rowley provides a nice IDE with GCC,
and their own library, which removes the one disadvantage of using
GCC. Their product is also available for Windows and Linux.


One of the biggest problems I ran into with GCC-ARM when using the
linux libraries for the TRITON boards, is that floating point operations
are executed as kernel interrupts (Undefined Instruction generating
jumps to a floating point emulator, I think.) I think it turned
out to be several times slower than the IAR floating point library
that runs in user mode.

And given that the IAR floating point library is one of the slowest available,
that is quite slow indeed.

Wilco


.

Relevant Pages

  • Re: STM32 ARM toolset advice?
    ... GCC Generates quite good code for the ARM these days. ... linux libraries for the TRITON boards, is that floating point operations ... I did find that an AT91SAM7S at 16Mhz using the IAR libraries, ...
    (comp.arch.embedded)
  • Re: STM32 ARM toolset advice?
    ... GCC Generates quite good code for the ARM these days. ... linux libraries for the TRITON boards, is that floating point operations ... I did find that an AT91SAM7S at 16Mhz using the IAR libraries, ...
    (comp.arch.embedded)
  • Re: problem of building stardict
    ... checking for gcc... ... checking for C compiler default output file name... ... checking how to recognize dependent libraries... ... checking for gfortran... ...
    (Fedora)
  • problem of building stardict
    ... checking for gcc... ... checking for C compiler default output file name... ... checking how to recognize dependent libraries... ... checking for gfortran... ...
    (Fedora)
  • Lib X11 compile problem /Xlib.h:3573: error: syntax error before "_X_SENTINEL"
    ... checking for gcc... ... checking for C compiler default output file name... ... checking how to recognise dependent libraries... ...
    (comp.os.linux.x)