stv0g/metalsvm
1
0
Fork 0
Code Issues Pull requests Releases Wiki Activity

only by a context switch, the FPU registers are saved in the task context

Browse source
This commit is contained in:
Stefan Lankes 2011-10-07 16:07:29 +02:00
parent 4f237a9069
commit c90a533521
1 changed files with 6 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
kernel/tasks.c
View file

@ -1268,12 +1268,6 @@ void scheduler(void)
if (curr_task->status == TASK_FINISHED) if (curr_task->status == TASK_FINISHED)
curr_task->status = TASK_INVALID; curr_task->status = TASK_INVALID;
/* if the task is using the FPU, we need to save the FPU context */
if (curr_task->flags & TASK_FPU_USED) {
save_fpu_state(&(curr_task->fpu));
curr_task->flags &= ~TASK_FPU_USED;
}
spinlock_irqsave_lock(&runqueues[core_id].lock); spinlock_irqsave_lock(&runqueues[core_id].lock);
// check timers // check timers
@ -1358,6 +1352,12 @@ get_task_out:
spinlock_irqsave_unlock(&runqueues[core_id].lock); spinlock_irqsave_unlock(&runqueues[core_id].lock);
if (curr_task != orig_task) { if (curr_task != orig_task) {
/* if the original task is using the FPU, we need to save the FPU context */
if ((orig_task->flags & TASK_FPU_USED) && (orig_task->status == TASK_READY)) {
save_fpu_state(&(orig_task->fpu));
orig_task->flags &= ~TASK_FPU_USED;
}
//kprintf("schedule from %u to %u with prio %u on core %u\n", //kprintf("schedule from %u to %u with prio %u on core %u\n",
// orig_task->id, curr_task->id, (uint32_t)curr_task->prio, CORE_ID); // orig_task->id, curr_task->id, (uint32_t)curr_task->prio, CORE_ID);
switch_task(curr_task->id); switch_task(curr_task->id);