convert_from_fxsr(struct user_i387_ia32_struct *env, struct task_struct *tsk)
{
	struct fxregs_state *fxsave = &tsk->thread.fpu.state.fxsave;
	struct _fpreg *to = (struct _fpreg *) &env->st_space[0];
	struct _fpxreg *from = (struct _fpxreg *) &fxsave->st_space[0];
	int i;

	env->cwd = fxsave->cwd | 0xffff0000u;
	env->swd = fxsave->swd | 0xffff0000u;
	env->twd = twd_fxsr_to_i387(fxsave);

#ifdef CONFIG_X86_64
	env->fip = fxsave->rip;
	env->foo = fxsave->rdp;
	/*
	 * should be actually ds/cs at fpu exception time, but
	 * that information is not available in 64bit mode.
	 */
	env->fcs = task_pt_regs(tsk)->cs;
	if (tsk == current) {
		savesegment(ds, env->fos);
	} else {
		env->fos = tsk->thread.ds;
	}
	env->fos |= 0xffff0000;
#else
	env->fip = fxsave->fip;
	env->fcs = (u16) fxsave->fcs | ((u32) fxsave->fop << 16);
	env->foo = fxsave->foo;
	env->fos = fxsave->fos;
#endif

	for (i = 0; i < 8; ++i)
		memcpy(&to[i], &from[i], sizeof(to[0]));
}

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