Implemented lazy FPU state save/restore. In the end mostly ported from NewOS. SMP safe.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17251 a95241bf-73f2-0310-859d-f6bbb57e9c96
2006-04-27 22:02:48 +00:00
parent fdfbd66456
commit 7eee76e65a
9 changed files with 56 additions and 35 deletions
@@ -10,6 +10,7 @@


 #include <smp.h>
+#include <thread.h>
 #include <timer.h>
 #include <boot/kernel_args.h>

@@ -24,6 +25,9 @@ typedef union cpu_ent {
 		int preempted;
 		timer quantum_timer;

+		// tells which thread's fpu state we hold
+		struct thread *fpu_state_thread;
+
 		// keeping track of CPU activity
 		bigtime_t active_time;
 		bigtime_t last_kernel_time;