mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-19 15:39:07 +00:00
75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
#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
|
|
|
|
struct user_regset;
|
|
|
|
extern int do_fpu_inst(unsigned short, struct pt_regs *);
|
|
|
|
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)
|
|
{
|
|
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();
|
|
}
|
|
|
|
static inline int init_fpu(struct task_struct *tsk)
|
|
{
|
|
if (tsk_used_math(tsk)) {
|
|
if ((boot_cpu_data.flags & CPU_HAS_FPU) && tsk == current)
|
|
unlazy_fpu(tsk, task_pt_regs(tsk));
|
|
return 0;
|
|
}
|
|
|
|
set_stopped_child_used_math(tsk);
|
|
return 0;
|
|
}
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif /* __ASM_SH_FPU_H */
|