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
