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fpu.h

#ifndef __ASM_SH_FPU_H
#define __ASM_SH_FPU_H

#ifndef __ASSEMBLY__
#include <linux/preempt.h>
#include <asm/ptrace.h>

#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;
}

struct task_struct;

extern void save_fpu(struct task_struct *__tsk, struct pt_regs *regs);
#else

#define release_fpu(regs)     do { } while (0)
#define grab_fpu(regs)        do { } while (0)

static inline void save_fpu(struct task_struct *tsk, struct pt_regs *regs)
{
      clear_tsk_thread_flag(tsk, TIF_USEDFPU);
}
#endif

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

static inline void unlazy_fpu(struct task_struct *tsk, struct pt_regs *regs)
{
      preempt_disable();
      if (test_tsk_thread_flag(tsk, TIF_USEDFPU))
            save_fpu(tsk, regs);
      preempt_enable();
}

static inline void clear_fpu(struct task_struct *tsk, struct pt_regs *regs)
{
      preempt_disable();
      if (test_tsk_thread_flag(tsk, TIF_USEDFPU)) {
            clear_tsk_thread_flag(tsk, TIF_USEDFPU);
            release_fpu(regs);
      }
      preempt_enable();
}

#endif /* __ASSEMBLY__ */

#endif /* __ASM_SH_FPU_H */

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