search for: stm8

Hi there, Inspired by the recent FOSDEM keynote, I've tried to write an LLVM backend for the STM8 microcontroller platform. The STM8S-Discovery evaluation board [1] has been handed out for free or is sold dirt- cheap, but there is no Open Source cross-compiler for it. The available ST assembler, linker and USB flash programmer are closed- source Windows binaries. And the compiler vendor I...

On Sun, Feb 20, 2011 at 4:23 PM, Andreas Färber <andreas.faerber at web.de> wrote: > Hi there, > > Inspired by the recent FOSDEM keynote, I've tried to write an LLVM > backend for the STM8 microcontroller platform. The STM8S-Discovery > evaluation board [1] has been handed out for free or is sold dirt- > cheap, but there is no Open Source cross-compiler for it. The > available ST assembler, linker and USB flash programmer are closed- > source Windows binaries. And the com...

...ar pointers? > > LLVM doesn't support distinguishing between near and far pointers. > Depending on how much work you want to put in and what exactly you're > trying to build, you might be able to get away with just pretending > all pointers are near and implementing __builtin_stm8_far_loadn() and > __builtin_stm8_far_storen() intrinsics, though. The example C code uses far pointers, e.g., to set up interrupt vectors: typedef void @far (*interrupt_handler_t)(void); struct interrupt_vector { unsigned char interrupt_instruction; interrupt_handler_t interrupt_handler...

...it > word-addressable DSP, but it is quite rough and it includes changes in > which you probably aren't interested (support for non-power-of-2 > integer sizes and some other bug fixes). I would be interested in non-power-of-two support. I started adding the very basics for i24 in my STM8 repo but there are still a couple places that do getIntegerWidth() * 2 calculations for expansion. Do you have a public repo and/or plans to merge those features into trunk? Andreas

On Tue, Mar 8, 2011 at 5:14 AM, Jacques Van Damme <Jacques.VanDamme at synopsys.com> wrote: > I am writing a backend for an architecture that has only 16-bit word > addressing (No byte addresses ever.  All data are always 16-bit). > > How can I specify this in the backend? In short, you can't. Word-addressable memory is not currently supported in LLVM (or Clang, for that

Hi All, I am writing a backend for an architecture that has only 16-bit word addressing (No byte addresses ever. All data are always 16-bit). How can I specify this in the backend? As an example, consider the following instruction: %arrayidx = getelementptr [129 x i16]* @flags, i16 0, i16 %i.043 When I generate assembler code, this now results in %i.043 being multiplied by 2 in the address

...You can reach the person managing the list at llvmdev-owner at cs.uiuc.edu When replying, please edit your Subject line so it is more specific than "Re: Contents of LLVMdev digest..." Today's Topics: 1. Re: attaching metadata to llvm::Argument (Andrew Clinton) 2. Re: STM8 backend for Clang (Andreas F?rber) 3. Clone a function and change signature (Arushi Aggarwal) 4. Re: Clone a function and change signature (John Criswell) 5. Re: Structure Types and ABI sizes (David A. Greene) 6. Re: still failed to build the llbrowse on Debian5-32b-llvm2.8 (Talin...