i387_32.h revision 4b29af0a1b8b25b43e4c0cb9bf066c52f3add9bd 
1/****************************************************************************
2 ****************************************************************************
3 ***
4 ***   This header was automatically generated from a Linux kernel header
5 ***   of the same name, to make information necessary for userspace to
6 ***   call into the kernel available to libc.  It contains only constants,
7 ***   structures, and macros generated from the original header, and thus,
8 ***   contains no copyrightable information.
9 ***
10 ****************************************************************************
11 ****************************************************************************/
12#ifndef __ASM_I386_I387_H
13#define __ASM_I386_I387_H
14
15#include <linux/sched.h>
16#include <linux/init.h>
17#include <linux/kernel_stat.h>
18#include <asm/processor.h>
19#include <asm/sigcontext.h>
20#include <asm/user.h>
21
22#define restore_fpu(tsk)   alternative_input(   "nop ; frstor %1",   "fxrstor %1",   X86_FEATURE_FXSR,   "m" ((tsk)->thread.i387.fxsave))
23
24#define kernel_fpu_end() do { stts(); preempt_enable(); } while(0)
25
26#define safe_address (kstat_cpu(0).cpustat.user)
27
28#define __unlazy_fpu( tsk ) do {   if (task_thread_info(tsk)->status & TS_USEDFPU) {   __save_init_fpu(tsk);   stts();   } else   tsk->fpu_counter = 0;  } while (0)
29#define __clear_fpu( tsk )  do {   if (task_thread_info(tsk)->status & TS_USEDFPU) {   asm volatile("fnclex ; fwait");   task_thread_info(tsk)->status &= ~TS_USEDFPU;   stts();   }  } while (0)
30#define unlazy_fpu( tsk ) do {   preempt_disable();   __unlazy_fpu(tsk);   preempt_enable();  } while (0)
31#define clear_fpu( tsk ) do {   preempt_disable();   __clear_fpu( tsk );   preempt_enable();  } while (0)
32
33#endif
34