Changes between Version 1 and Version 2 of library_stdio

Timestamp:

Aug 6, 2014, 3:15:03 PM (10 years ago)

Author:

alain

Comment:

--

library_stdio

@@ -1 @@
-== TO BE DONE ==
+= The stdio Library =
+
+The [source:soft/giet_vm/giet_libs/stdio.c stdio.c] and [source:soft/giet_vm/giet_libs/stdio.h stdio.h] files contains all system calls provided to user applications by the GIET-VM.
+
+ == Processor protected registers ==
+
+ * '''int giet_procid()'''
+This function returns the global processor identifier gpid, depending on (X,Y,L) where X,Y are the cluster coordinates, and L is the local processor index.
+The format is  gpid = X<<Y_WIDTH + Y) * NB_PROCS_MAX) + L
+
+ * '''int giet_proctime()'''
+This function returns the local processor time (number of cycles from reset.
+
+ * '''int giet_rand()
+This function returns a pseudo-random value derived from both the processor 
+cycle count and the processor index. This value is comprised between 0 & 65535.
+
+ == Informations stored in the running task context ==
+
+ * int giet_proc_task_id();
+This functions returns the local task index, identifying the task amongst all task
+running on the same processor.
+
+ * '''int giet_global_task_id()''' 
+This functions returns the global task id, unique in the system.
+
+ * '''int giet_thread_id()''' 
+This functions returns the thread index, identiying the task in a given vspace.
+