http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/asm-i386/i387.h

/* * include/asm-i386/i387.h * * Copyright (C) 1994 Linus Torvalds * * Pentium III FXSR, SSE support * General FPU state handling cleanups * Gareth Hughes <gareth@valinux.com>, May 2000 */ #ifndef __ASM_I386_I387_H #define __ASM_I386_I387_H #include <linux/sched.h> #include <linux/init.h> #include <asm/processor.h> #include <asm/sigcontext.h> #include <asm/user.h> extern void mxcsr_feature_mask_init(void); extern void init_fpu(struct task_struct *); /* * FPU lazy state save handling... */ /* * The "nop" is needed to make the instructions the same * length. */ #define restore_fpu(tsk) \ alternative_input( \ "nop ; frstor %1", \ "fxrstor %1", \ X86_FEATURE_FXSR, \ "m" ((tsk)->thread.i387.fxsave)) extern void kernel_fpu_begin(void); #define kernel_fpu_end() do { stts(); preempt_enable(); } while(0) /* * These must be called with preempt disabled */ static inline void __save_init_fpu( struct task_struct *tsk ) { alternative_input( "fnsave %1 ; fwait ;" GENERIC_NOP2, "fxsave %1 ; fnclex", X86_FEATURE_FXSR, "m" (tsk->thread.i387.fxsave) :"memory"); task_thread_info(tsk)->status &= ~TS_USEDFPU; } #define __unlazy_fpu( tsk ) do { \ if (task_thread_info(tsk)->status & TS_USEDFPU) \ save_init_fpu( tsk ); \ } while (0) #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) /* * These disable preemption on their own and are safe */ static inline void save_init_fpu( struct task_struct *tsk ) { preempt_disable(); __save_init_fpu(tsk); stts(); preempt_enable(); } #define unlazy_fpu( tsk ) do { \ preempt_disable(); \ __unlazy_fpu(tsk); \ preempt_enable(); \ } while (0) #define clear_fpu( tsk ) do { \ preempt_disable(); \ __clear_fpu( tsk ); \ preempt_enable(); \ } while (0) \ /* * FPU state interaction... */ extern unsigned short get_fpu_cwd( struct task_struct *tsk ); extern unsigned short get_fpu_swd( struct task_struct *tsk ); extern unsigned short get_fpu_mxcsr( struct task_struct *tsk ); /* * Signal frame handlers... */ extern int save_i387( struct _fpstate __user *buf ); extern int restore_i387( struct _fpstate __user *buf ); /* * ptrace request handers... */ extern int get_fpregs( struct user_i387_struct __user *buf, struct task_struct *tsk ); extern int set_fpregs( struct task_struct *tsk, struct user_i387_struct __user *buf ); extern int get_fpxregs( struct user_fxsr_struct __user *buf, struct task_struct *tsk ); extern int set_fpxregs( struct task_struct *tsk, struct user_fxsr_struct __user *buf ); /* * FPU state for core dumps... */ extern int dump_fpu( struct pt_regs *regs, struct user_i387_struct *fpu ); #endif /* __ASM_I386_I387_H */