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/*
* 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 <xen/sched.h>
#include <asm/processor.h>
extern void init_fpu(void);
extern void save_init_fpu(struct vcpu *tsk);
extern void restore_fpu(struct vcpu *tsk);
#define unlazy_fpu(_tsk) do { \
if ( test_bit(_VCPUF_fpu_dirtied, &(_tsk)->vcpu_flags) ) \
save_init_fpu(_tsk); \
} while ( 0 )
#define load_mxcsr( val ) do { \
unsigned long __mxcsr = ((unsigned long)(val) & 0xffbf); \
__asm__ __volatile__ ( "ldmxcsr %0" : : "m" (__mxcsr) ); \
} while ( 0 )
/* Make domain the FPU owner */
static inline void setup_fpu(struct vcpu *v)
{
if ( !test_and_set_bit(_VCPUF_fpu_dirtied, &v->vcpu_flags) )
{
if ( test_bit(_VCPUF_fpu_initialised, &v->vcpu_flags) )
restore_fpu(v);
else
init_fpu();
}
}
#endif /* __ASM_I386_I387_H */
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