~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~ [ freetext search ] ~ [ file search ] ~

i387.h

Version: ~ [ 2.4.0 ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * include/asm-i386/i387.h
  3  *
  4  * Copyright (C) 1994 Linus Torvalds
  5  *
  6  * Pentium III FXSR, SSE support
  7  * General FPU state handling cleanups
  8  *      Gareth Hughes <gareth@valinux.com>, May 2000
  9  */
 10 
 11 #ifndef __ASM_I386_I387_H
 12 #define __ASM_I386_I387_H
 13 
 14 #include <linux/sched.h>
 15 #include <asm/processor.h>
 16 #include <asm/sigcontext.h>
 17 #include <asm/user.h>
 18 
 19 extern void init_fpu(void);
 20 /*
 21  * FPU lazy state save handling...
 22  */
 23 extern void save_init_fpu( struct task_struct *tsk );
 24 extern void restore_fpu( struct task_struct *tsk );
 25 
 26 #define unlazy_fpu( tsk ) do { \
 27         if ( tsk->flags & PF_USEDFPU ) \
 28                 save_init_fpu( tsk ); \
 29 } while (0)
 30 
 31 #define clear_fpu( tsk ) do { \
 32         if ( tsk->flags & PF_USEDFPU ) { \
 33                 asm volatile("fwait"); \
 34                 tsk->flags &= ~PF_USEDFPU; \
 35                 stts(); \
 36         } \
 37 } while (0)
 38 
 39 /*
 40  * FPU state interaction...
 41  */
 42 extern unsigned short get_fpu_cwd( struct task_struct *tsk );
 43 extern unsigned short get_fpu_swd( struct task_struct *tsk );
 44 extern unsigned short get_fpu_twd( struct task_struct *tsk );
 45 extern unsigned short get_fpu_mxcsr( struct task_struct *tsk );
 46 
 47 extern void set_fpu_cwd( struct task_struct *tsk, unsigned short cwd );
 48 extern void set_fpu_swd( struct task_struct *tsk, unsigned short swd );
 49 extern void set_fpu_twd( struct task_struct *tsk, unsigned short twd );
 50 extern void set_fpu_mxcsr( struct task_struct *tsk, unsigned short mxcsr );
 51 
 52 #define load_mxcsr( val ) do { \
 53         if ( cpu_has_xmm ) { \
 54                 unsigned long __mxcsr = ((unsigned long)(val) & 0xffff); \
 55                 asm volatile( "ldmxcsr %0" : : "m" (__mxcsr) ); \
 56         } \
 57 } while (0)
 58 
 59 /*
 60  * Signal frame handlers...
 61  */
 62 extern int save_i387( struct _fpstate *buf );
 63 extern int restore_i387( struct _fpstate *buf );
 64 
 65 /*
 66  * ptrace request handers...
 67  */
 68 extern int get_fpregs( struct user_i387_struct *buf,
 69                        struct task_struct *tsk );
 70 extern int set_fpregs( struct task_struct *tsk,
 71                        struct user_i387_struct *buf );
 72 
 73 extern int get_fpxregs( struct user_fxsr_struct *buf,
 74                         struct task_struct *tsk );
 75 extern int set_fpxregs( struct task_struct *tsk,
 76                         struct user_fxsr_struct *buf );
 77 
 78 /*
 79  * FPU state for core dumps...
 80  */
 81 extern int dump_fpu( struct pt_regs *regs,
 82                      struct user_i387_struct *fpu );
 83 extern int dump_extended_fpu( struct pt_regs *regs,
 84                               struct user_fxsr_struct *fpu );
 85 
 86 #endif /* __ASM_I386_I387_H */
 87

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~ [ freetext search ] ~ [ file search ] ~

This page was automatically generated by the LXR engine.
Visit the LXR main site for more information.

Linux Cross Reference Linux/include/asm-i386/i387.h

Linux Cross Reference
Linux/include/asm-i386/i387.h