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| author | kaf24@scramble.cl.cam.ac.uk <kaf24@scramble.cl.cam.ac.uk> | 2004-06-10 16:59:06 +0000 |
|---|---|---|
| committer | kaf24@scramble.cl.cam.ac.uk <kaf24@scramble.cl.cam.ac.uk> | 2004-06-10 16:59:06 +0000 |
| commit | 7f68576b77ef3c9fde1009100690ff996d4490e0 (patch) | |
| tree | 6a87f66c7a03042baa556676add65252816fbd94 /xen/include/asm-x86/i387.h | |
| parent | 822a0b35350d8006b808000eef3665ee4df7b297 (diff) | |
| download | xen-7f68576b77ef3c9fde1009100690ff996d4490e0.tar.gz xen-7f68576b77ef3c9fde1009100690ff996d4490e0.tar.bz2 xen-7f68576b77ef3c9fde1009100690ff996d4490e0.zip | |
bitkeeper revision 1.952 (40c8935a3XSRdQfnx5RoO7XgaggvOQ)
Towards x86_64 support. Merged a bunch of the existing x86_64 stuff
back into a generic 'x86' architecture. Aim is to share as much
as possible between 32- and 64-bit worlds.
Diffstat (limited to 'xen/include/asm-x86/i387.h')
| -rw-r--r-- | xen/include/asm-x86/i387.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/xen/include/asm-x86/i387.h b/xen/include/asm-x86/i387.h new file mode 100644 index 0000000000..95a6bb6cde --- /dev/null +++ b/xen/include/asm-x86/i387.h @@ -0,0 +1,38 @@ +/* + * 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 task_struct *tsk ); +extern void restore_fpu( struct task_struct *tsk ); + +#define unlazy_fpu( tsk ) do { \ + if ( test_bit(PF_USEDFPU, &tsk->flags) ) \ + save_init_fpu( tsk ); \ +} while (0) + +#define clear_fpu( tsk ) do { \ + if ( test_and_clear_bit(PF_USEDFPU, &tsk->flags) ) { \ + asm volatile("fwait"); \ + stts(); \ + } \ +} while (0) + +#define load_mxcsr( val ) do { \ + unsigned long __mxcsr = ((unsigned long)(val) & 0xffbf); \ + asm volatile( "ldmxcsr %0" : : "m" (__mxcsr) ); \ +} while (0) + +#endif /* __ASM_I386_I387_H */ |