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fpu.h revision 1.6.4.2 
      1 /*	$NetBSD: fpu.h,v 1.6.4.2 2014/05/18 17:45:30 rmind 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_ */
     45