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union i387_union {
struct i387_fsave_struct fsave;ÓɾßÓÐÊýѧд¦ÀíÆ÷¡¢Ò²¿ÉÄÜÓÐmmxµ¥ÔªµÄcpuÄ£ÐÍʹÓá£
struct i387_fxsave_struct fxsave;ÓɾßÓÐsee,sse2À©Õ¹¹¦ÄܵÄcpuÄ£ÐÍʹÓá£
struct i387_soft_struct soft;ÓÉÎÞÊýѧд¦ÀíÆ÷µÄcpuÄ£ÐÍʹÓã»linuxÄÚºËͨ¹ýÈí¼þÄ£Äâд¦ÀíÆ÷À´Ö§³ÖÕâЩÀÏʽоƬ¡£
};
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struct i387_fsave_struct {
long cwd;
long swd;
long t
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