sys/arch/x86/include/fpu.h

   1 /*      $NetBSD: fpu.h,v 1.6 2014/02/25 22:16:52 dsl Exp $      */
   2
   3 #ifndef _X86_FPU_H_
   4 #define _X86_FPU_H_
   5
   6 #include <x86/cpu_extended_state.h>
   7
   8 #ifdef _KERNEL
   9
  10 struct cpu_info;
  11 struct lwp;
  12 struct trapframe;
  13
  14 void fpuinit(struct cpu_info *);
  15 void fpusave_lwp(struct lwp *, bool);
  16 void fpusave_cpu(bool);
  17
  18 void fpu_set_default_cw(struct lwp *, unsigned int);
  19
  20 void fputrap(struct trapframe *);
  21 void fpudna(struct trapframe *);
  22
  23 void process_xmm_to_s87(const struct fxsave *, struct save87 *);
  24 void process_s87_to_xmm(const struct save87 *, struct fxsave *);
  25
  26 /* Set all to defaults (eg during exec) */
  27 void fpu_save_area_clear(struct lwp *, unsigned int);
  28 /* Reset control words only - for signal handlers */
  29 void fpu_save_area_reset(struct lwp *);
  30
  31 /* Copy data outside pcb during fork */
  32 void fpu_save_area_fork(struct pcb *, const struct pcb *);
  33
  34 /* Load FP registers with user-supplied values */
  35 void process_write_fpregs_xmm(struct lwp *lwp, const struct fxsave *fpregs);
  36 void process_write_fpregs_s87(struct lwp *lwp, const struct save87 *fpregs);
  37
  38 /* Save FP registers for copy to userspace */
  39 void process_read_fpregs_xmm(struct lwp *lwp, struct fxsave *fpregs);
  40 void process_read_fpregs_s87(struct lwp *lwp, struct save87 *fpregs);
  41
  42 #endif
  43
  44 #endif /* _X86_FPU_H_ */