include/asm-sh/fpu.h

   1 #ifndef __ASM_SH_FPU_H
   2 #define __ASM_SH_FPU_H
   3
   4 #define SR_FD    0x00008000
   5
   6 #ifndef __ASSEMBLY__
   7 #include <asm/ptrace.h>
   8
   9 #ifdef CONFIG_SH_FPU
  10 static inline void release_fpu(struct pt_regs *regs)
  11 {
  12         regs->sr |= SR_FD;
  13 }
  14
  15 static inline void grab_fpu(struct pt_regs *regs)
  16 {
  17         regs->sr &= ~SR_FD;
  18 }
  19
  20 struct task_struct;
  21
  22 extern void save_fpu(struct task_struct *__tsk, struct pt_regs *regs);
  23 #else
  24 #define release_fpu(regs)       do { } while (0)
  25 #define grab_fpu(regs)          do { } while (0)
  26 #define save_fpu(tsk, regs)     do { } while (0)
  27 #endif
  28
  29 extern int do_fpu_inst(unsigned short, struct pt_regs *);
  30
  31 #define unlazy_fpu(tsk, regs) do {                      \
  32         if (test_tsk_thread_flag(tsk, TIF_USEDFPU)) {   \
  33                 save_fpu(tsk, regs);                    \
  34         }                                               \
  35 } while (0)
  36
  37 #define clear_fpu(tsk, regs) do {                               \
  38         if (test_tsk_thread_flag(tsk, TIF_USEDFPU)) {           \
  39                 clear_tsk_thread_flag(tsk, TIF_USEDFPU);        \
  40                 release_fpu(regs);                              \
  41         }                                                       \
  42 } while (0)
  43
  44 #endif /* __ASSEMBLY__ */
  45
  46 #endif /* __ASM_SH_FPU_H */