Imagelibrary/rtems
1
0
Fork 1
mirror of https://gitlab.rtems.org/rtems/rtos/rtems.git synced 2025-12-26 22:48:23 +00:00
Code Issues Packages Projects Releases Wiki Activity

_Thread_Start_multitasking: added code to initialize the floating point

Browse Source 
context of the first thread to execute.
This commit is contained in:
Joel Sherrill
1996-08-15 21:05:21 +00:00
parent 9ac3e76569
commit 0600e86f61
2 changed files with 50 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
c/src/exec/score/src/thread.c
View File

@@ -197,7 +197,31 @@ void _Thread_Start_multitasking( void )
_Thread_Executing = _Thread_Heir;
_Context_Switch( &_Thread_BSP_context, &_Thread_Executing->Registers );
/*
* Get the init task(s) running.
*
* Note: Thread_Dispatch() is normally used to dispatch threads. As
* part of its work, Thread_Dispatch() restores floating point
* state for the heir task.
*
* This code avoids Thread_Dispatch(), and so we have to restore
* (actually initialize) the floating point state "by hand".
*
* Ignore the CPU_USE_DEFERRED_FP_SWITCH because we must always
* switch in the first thread if it is FP.
*/
#if ( CPU_HARDWARE_FP == TRUE )
/*
* don't need to worry about saving BSP's floating point state
*/
if ( _Thread_Heir->fp_context != NULL )
_Context_Restore_fp( &_Thread_Heir->fp_context );
#endif
_Context_Switch( &_Thread_BSP_context, &_Thread_Heir->Registers );
}
/*PAGE