fpu.h

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#ifndef __ASM_SH_FPU_H
#define __ASM_SH_FPU_H

#ifndef __ASSEMBLY__

struct task_struct;

#ifdef CONFIG_SH_FPU
static inline void release_fpu(struct pt_regs *regs)
{
    regs->sr |= SR_FD;
}

static inline void grab_fpu(struct pt_regs *regs)
{
    regs->sr &= ~SR_FD;
}

extern void save_fpu(struct task_struct *__tsk);
extern void restore_fpu(struct task_struct *__tsk);
extern void fpu_state_restore(struct pt_regs *regs);
extern void __fpu_state_restore(void);
#else
#define save_fpu(tsk)           do { } while (0)
#define restore_fpu(tsk)        do { } while (0)
#define release_fpu(regs)       do { } while (0)
#define grab_fpu(regs)          do { } while (0)
#define fpu_state_restore(regs)     do { } while (0)
#define __fpu_state_restore(regs)   do { } while (0)
#endif

struct user_regset;

extern int do_fpu_inst(unsigned short, struct pt_regs *);
extern int init_fpu(struct task_struct *);

extern int fpregs_get(struct task_struct *target,
              const struct user_regset *regset,
              unsigned int pos, unsigned int count,
              void *kbuf, void __user *ubuf);

static inline void __unlazy_fpu(struct task_struct *tsk, struct pt_regs *regs)
{
    if (task_thread_info(tsk)->status & TS_USEDFPU) {
        task_thread_info(tsk)->status &= ~TS_USEDFPU;
        save_fpu(tsk);
        release_fpu(regs);
    } else
        tsk->fpu_counter = 0;
}

static inline void unlazy_fpu(struct task_struct *tsk, struct pt_regs *regs)
{
    preempt_disable();
    __unlazy_fpu(tsk, regs);
    preempt_enable();
}

static inline void clear_fpu(struct task_struct *tsk, struct pt_regs *regs)
{
    preempt_disable();
    if (task_thread_info(tsk)->status & TS_USEDFPU) {
        task_thread_info(tsk)->status &= ~TS_USEDFPU;
        release_fpu(regs);
    }
    preempt_enable();
}

#endif /* __ASSEMBLY__ */

#endif /* __ASM_SH_FPU_H */