fix: restore integer MatMul support and use snrt_cluster_core_idx() in macros

- Add int8→int32 MatMul binding to SnitchMatMulBindings (was lost when
  switching from BasicMatMulBindings to Snitch-specific bindings)
- Replace core_id with snrt_cluster_core_idx() in BEGIN_SINGLE_CORE and
  SINGLE_CORE macros, since core_id is not available inside TiledTransformer
  closure functions

Author: lee2716

Deeploy/Targets/Snitch/Bindings.py

@@ -11,7 +11,7 @@
 from Deeploy.CommonExtensions.DataTypes import float32_t, int8_t, int32_t, uint8_t
 from Deeploy.DeeployTypes import CodeTransformation, NodeBinding
 from Deeploy.FutureExtension.CodeTransformationPasses.FutureCodeTransformation import FutureGeneration
-from Deeploy.Targets.Generic.Templates import ConcatTemplate, iNoNormTemplate
+from Deeploy.Targets.Generic.Templates import ConcatTemplate, MatMulTemplate, iNoNormTemplate
 from Deeploy.Targets.Generic.TypeCheckers import AddChecker, ConcatChecker, DivChecker, GatherChecker, GEMMChecker, \
     HardswishChecker, MatMulChecker, MulChecker, ReshapeChecker, RMSNormChecker, RQAddChecker, SoftmaxChecker, \
     TransposeChecker, iNoNormChecker
@@ -129,6 +129,8 @@
 
 # MatMul Bindings (Tiled)
 SnitchMatMulBindings = [
+    NodeBinding(MatMulChecker([PointerClass(int8_t), PointerClass(int8_t)], [PointerClass(int32_t)]),
+                MatMulTemplate.referenceTemplate, TiledTransformer),
     NodeBinding(MatMulChecker([PointerClass(float32_t), PointerClass(float32_t)], [PointerClass(float32_t)]),
                 FloatMatMulTemplate.referenceTemplate, TiledTransformer)
 ]

TargetLibraries/Snitch/inc/DeeploySnitchMath.h

@@ -12,9 +12,9 @@
 #include <stdint.h>
 #include <string.h>
 
-#define BEGIN_SINGLE_CORE if (core_id == 0) {
+#define BEGIN_SINGLE_CORE if (snrt_cluster_core_idx() == 0) {
 #define END_SINGLE_CORE }
-#define SINGLE_CORE if (core_id == 0)
+#define SINGLE_CORE if (snrt_cluster_core_idx() == 0)
 
 #include "CycleCounter.h"
 #include "macros.h"