avoid to change ggml_task_type

Author: howard0su

ggml.c

@@ -2725,9 +2725,9 @@ struct ggml_context_container {
 //
 
 enum ggml_task_type {
-    GGML_TASK_INIT = 1,
-    GGML_TASK_COMPUTE = 2,
-    GGML_TASK_FINALIZE = 4,
+    GGML_TASK_INIT = 0,
+    GGML_TASK_COMPUTE,
+    GGML_TASK_FINALIZE,
 };
 
 struct ggml_compute_params {
@@ -9260,13 +9260,14 @@ static void ggml_graph_compute_thread(void * data) {
     int type = state->params.type;
     if (state->node) {
         if (state->params.ith < state->params.nth) {
-            if (type & GGML_TASK_INIT)
+            if (type == GGML_TASK_INIT)
             {
                 state->params.type = GGML_TASK_INIT;
                 ggml_compute_forward(&state->params, state->node);
+                type = GGML_TASK_COMPUTE;
             }
 
-            if (type & GGML_TASK_COMPUTE)
+            if (type == GGML_TASK_COMPUTE)
             {
                 state->params.type = GGML_TASK_COMPUTE;
                 ggml_compute_forward(&state->params, state->node);
@@ -9579,7 +9580,7 @@ void ggml_graph_compute(struct ggml_context * ctx, struct ggml_cgraph * cgraph)
                     continue;
 
                 workers[next_task].params = (struct ggml_compute_params) {
-                    .type  = GGML_TASK_COMPUTE | GGML_TASK_INIT,
+                    .type  = GGML_TASK_INIT,
                     .ith   = 0,
                     .nth   = 1,
                     .wsize = 0,