Use upstream LLVM with generic runtime

[JosseVanDelm]

Solves #48

Note that there are still two linking dependencies that I'm hauling over from the old toolchain.
In KULeuven-MICAS/snax_cluster#57 this toolchain was installed by default, here I have to explicitly keep it in the installation but also copy over the static libraries.

• libclang_rt.builtins-riscv32.a: this is not built with the standard distribution of LLVM and I'm too lazy to build this myself.
  More info here (I think) : https://github.com/llvm/llvm-project/tree/main/compiler-rt/lib/builtins
• libc.a apparently there are a few routines in the runtime that rely on memset: Not sure why we would have to stick to this specific version, but hey it works. Compiling directly with only the source of memset might save us a few kb's in the final elf file size, but I'm not sure about this.
  One implementation is in musl: https://git.musl-libc.org/cgit/musl/tree/src/string/memset.c

[jorendumoulin]

😄

[jorendumoulin]

😄

[JosseVanDelm]

Using the files and building locally,
Undoing #46

I have these issues:

Simple copy ❌

 main.c:28:5: warning: implicit declaration of function '_mlir_ciface_simple_copy' is invalid in C99 [-Wimplicit-function-declaration]
    _mlir_ciface_simple_copy(&memrefA, &memrefB);
    ^ 

In clang 17 this is an error instead of a warning, and the function has to be declared before it can be used.

diff --git a/kernels/simple_copy/main.c b/kernels/simple_copy/main.c
index eeed3fc..0e1fa5a 100644
--- a/kernels/simple_copy/main.c
+++ b/kernels/simple_copy/main.c
@@ -5,6 +5,9 @@
 #include <snrt.h>
 #include <stdint.h>
 
+
+void _mlir_ciface_simple_copy(OneDMemrefI32_t* memrefA, OneDMemrefI32_t* memrefB);
+
 int main() {
 
   // create memref object for A

Furthermore, it fails:

Warning: Failed to write binary name to logs/.rtlbinary
[fesvr] Wrote 36 bytes of bootrom to 0x1000
[fesvr] Wrote entry point 0x80000000 to bootloader slot 0x1020
[fesvr] Wrote 56 bytes of bootdata to 0x1024
[Tracer] Logging Hart          0 to logs/trace_hart_00000000.dasm
[Tracer] Logging Hart          1 to logs/trace_hart_00000001.dasm
*** FAILED *** (tohost = 1)

Simple mult ✔️

Simple matmult ✔️

After applying this fix:

diff --git a/kernels/simple_matmul/main.c b/kernels/simple_matmul/main.c
index 1e37e3c..00c7789 100644
--- a/kernels/simple_matmul/main.c
+++ b/kernels/simple_matmul/main.c
@@ -49,7 +49,7 @@ void _mlir_ciface_simple_matmul_cpu(TwoDMemrefI8_t *a, TwoDMemrefI8_t *b,
   int8_t *a_ptr = a->aligned_data;
   int8_t *b_ptr = b->aligned_data;
   int32_t *c_ptr = c->aligned_data;
-  batch_gemm_cpu(Batch, M_param, K_param, N_param, a_ptr, b_ptr, c_ptr,
+  batch_gemm_cpu(Batch, M_param, K_param, N_param, a_ptr, b_ptr, 0, 0, c_ptr,
                  strideInnermostA, strideInnermostB, strideInnermostC, ldA, ldB,
                  ldC, strideA, strideB, strideC);
 }

Alloc ✔️

[jorendumoulin]

I fixed the simple_copy kernel! See #54
I also fixed the xdsl thingy, see #53

[JosseVanDelm]

Awaiting merging of #53