patch-2.4.0-test2 linux/include/asm-i386/i387.h

• Lines: 86
• Date: Fri Jun 23 21:32:34 2000
• Orig file: v2.4.0-test1/linux/include/asm-i386/i387.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test1/linux/include/asm-i386/i387.h linux/include/asm-i386/i387.h
@@ -0,0 +1,85 @@
+/*
+ * include/asm-i386/i387.h
+ *
+ * Copyright (C) 1994 Linus Torvalds
+ *
+ * Pentium III FXSR, SSE support
+ * General FPU state handling cleanups
+ *	Gareth Hughes <gareth@valinux.com>, May 2000
+ */
+
+#ifndef __ASM_I386_I387_H
+#define __ASM_I386_I387_H
+
+#include <linux/sched.h>
+#include <asm/processor.h>
+#include <asm/sigcontext.h>
+#include <asm/user.h>
+
+/*
+ * FPU lazy state save handling...
+ */
+extern void save_fpu( struct task_struct *tsk );
+extern void save_init_fpu( struct task_struct *tsk );
+extern void restore_fpu( struct task_struct *tsk );
+
+#define unlazy_fpu( tsk ) do { \
+	if ( tsk->flags & PF_USEDFPU ) \
+		save_fpu( tsk ); \
+} while (0)
+
+#define clear_fpu( tsk ) do { \
+	if ( tsk->flags & PF_USEDFPU ) { \
+		tsk->flags &= ~PF_USEDFPU; \
+		stts(); \
+	} \
+} while (0)
+
+/*
+ * FPU state interaction...
+ */
+extern unsigned short get_fpu_cwd( struct task_struct *tsk );
+extern unsigned short get_fpu_swd( struct task_struct *tsk );
+extern unsigned short get_fpu_twd( struct task_struct *tsk );
+extern unsigned short get_fpu_mxcsr( struct task_struct *tsk );
+
+extern void set_fpu_cwd( struct task_struct *tsk, unsigned short cwd );
+extern void set_fpu_swd( struct task_struct *tsk, unsigned short swd );
+extern void set_fpu_twd( struct task_struct *tsk, unsigned short twd );
+extern void set_fpu_mxcsr( struct task_struct *tsk, unsigned short mxcsr );
+
+#define load_mxcsr( val ) do { \
+	if ( cpu_has_xmm ) { \
+		unsigned long __mxcsr = ((unsigned long)(val) & 0xffff); \
+		asm volatile( "ldmxcsr %0" : : "m" (__mxcsr) ); \
+	} \
+} while (0)
+
+/*
+ * Signal frame handlers...
+ */
+extern int save_i387( struct _fpstate *buf );
+extern int restore_i387( struct _fpstate *buf );
+
+/*
+ * ptrace request handers...
+ */
+extern int get_fpregs( struct user_i387_struct *buf,
+		       struct task_struct *tsk );
+extern int set_fpregs( struct task_struct *tsk,
+		       struct user_i387_struct *buf );
+
+extern int get_fpxregs( struct user_fxsr_struct *buf,
+			struct task_struct *tsk );
+extern int set_fpxregs( struct task_struct *tsk,
+			struct user_fxsr_struct *buf );
+
+/*
+ * FPU state for core dumps...
+ */
+extern int dump_fpu( struct pt_regs *regs,
+		     struct user_i387_struct *fpu );
+extern int dump_extended_fpu( struct pt_regs *regs,
+			      struct user_fxsr_struct *fpu );
+
+#endif /* __ASM_I386_I387_H */