1. 根目录:
2. arch
3. unicore32
4. include
5. asm
6. fpu-ucf64.h

/*
 * linux/arch/unicore32/include/asm/fpu-ucf64.h
 *
 * Code specific to PKUnity SoC and UniCore ISA
 *
 *	Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
 *	Copyright (C) 2001-2010 Guan Xuetao
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#define FPSCR			s31

/* FPSCR bits */
#define FPSCR_DEFAULT_NAN	(1<<25)

#define FPSCR_CMPINSTR_BIT	(1<<31)

#define FPSCR_CON		(1<<29)
#define FPSCR_TRAP		(1<<27)

/* RND mode */
#define FPSCR_ROUND_NEAREST	(0<<0)
#define FPSCR_ROUND_PLUSINF	(2<<0)
#define FPSCR_ROUND_MINUSINF	(3<<0)
#define FPSCR_ROUND_TOZERO	(1<<0)
#define FPSCR_RMODE_BIT		(0)
#define FPSCR_RMODE_MASK	(7 << FPSCR_RMODE_BIT)

/* trap enable */
#define FPSCR_IOE		(1<<16)
#define FPSCR_OFE		(1<<14)
#define FPSCR_UFE		(1<<13)
#define FPSCR_IXE		(1<<12)
#define FPSCR_HIE		(1<<11)
#define FPSCR_NDE		(1<<10)	/* non denomal */

/* flags */
#define FPSCR_IDC		(1<<24)
#define FPSCR_HIC		(1<<23)
#define FPSCR_IXC		(1<<22)
#define FPSCR_OFC		(1<<21)
#define FPSCR_UFC		(1<<20)
#define FPSCR_IOC		(1<<19)

/* stick bits */
#define FPSCR_IOS		(1<<9)
#define FPSCR_OFS		(1<<7)
#define FPSCR_UFS		(1<<6)
#define FPSCR_IXS		(1<<5)
#define FPSCR_HIS		(1<<4)
#define FPSCR_NDS		(1<<3)	/*non denomal */