Small fixes

* Add a function prototype
* Add NEureka size conditional macro definitions
* Use `nop` in soft_clear HAL function

Author: LuigiGhionda

neureka/hal/neureka_task.h

@@ -141,6 +141,8 @@ void neureka_task_set_input_signed(neureka_task_t *task);
 void neureka_task_set_input_unsigned(neureka_task_t *task);
 void neureka_task_set_weight_source(neureka_task_t *task,
                                     neureka_weight_source_e weight_source);
+void neureka_task_set_activation_prefetch(neureka_task_t *task,
+                                          neureka_activation_prefetch_e activation_prefetch);
 uint32_t neureka_get_tile_padding(uint32_t padding, uint32_t i_height,
                                   uint32_t i_width, uint32_t n_height,
                                   uint32_t n_width);

neureka/hal/neureka_task_defs.h

@@ -23,8 +23,12 @@
 
 /* ARCHITECTURE */
 
-#define NNX_NEUREKA_PE_H (6)
-#define NNX_NEUREKA_PE_W (6)
+#ifndef NNX_NEUREKA_PE_H
+  #define NNX_NEUREKA_PE_H (4)
+#endif
+#ifndef NNX_NEUREKA_PE_W
+  #define NNX_NEUREKA_PE_W (4)
+#endif
 
 #define NEUREKA_SUBTILE_INPUT_HEIGHT_1x1 (NNX_NEUREKA_PE_H)
 #define NEUREKA_SUBTILE_INPUT_WIDTH_1x1  (NNX_NEUREKA_PE_W)

util/hwpe.c

@@ -50,8 +50,7 @@ inline uint32_t hwpe_task_reg_read(hwpe_dev_t *dev, int reg) {
 
 void hwpe_soft_clear(hwpe_dev_t *dev) {
   hwpe_reg_write(dev, HWPE_SOFT_CLEAR, 0);
-  for (volatile int i = 0; i < 10; i++)
-    ;
+  for (int i = 0; i < 5; i++) asm volatile("nop;");
 }
 
 uint32_t hwpe_task_queue_status(hwpe_dev_t *dev) {