riscv_bits.h 文件参考

浏览源代码.

宏定义
#define	likely(x)   __builtin_expect((x), 1)
#define	unlikely(x)   __builtin_expect((x), 0)
#define	ROUNDUP(a, b)   ((((a)-1)/(b)+1)*(b))
#define	ROUNDDOWN(a, b)   ((a)/(b)*(b))
#define	MAX(a, b)   ((a) > (b) ? (a) : (b))
#define	MIN(a, b)   ((a) < (b) ? (a) : (b))
#define	CLAMP(a, lo, hi)   MIN(MAX(a, lo), hi)
#define	EXTRACT_FIELD(val, which)   (((val) & (which)) / ((which) & ~((which)-1)))
#define	INSERT_FIELD(val, which, fieldval)   (((val) & ~(which)) | ((fieldval) * ((which) & ~((which)-1))))
#define	STR(x)   XSTR(x)
#define	XSTR(x)   #x
#define	SLL32   sll
#define	STORE   sw
#define	LOAD   lw
#define	LWU   lw
#define	LOG_REGBYTES   2
#define	REGBYTES   (1 << LOG_REGBYTES)

宏定义说明

CLAMP

#define CLAMP	(		a,
			lo,
			hi
	)		MIN(MAX(a, lo), hi)

EXTRACT_FIELD

#define EXTRACT_FIELD	(		val,
			which
	)		(((val) & (which)) / ((which) & ~((which)-1)))

INSERT_FIELD

#define INSERT_FIELD	(		val,
			which,
			fieldval
	)		(((val) & ~(which)) | ((fieldval) * ((which) & ~((which)-1))))

likely

#define likely

(

x

)

__builtin_expect((x), 1)

LOAD

#define LOAD   lw

LOG_REGBYTES

#define LOG_REGBYTES   2

LWU

#define LWU   lw

MAX

#define MAX	(		a,
			b
	)		((a) > (b) ? (a) : (b))

MIN

#define MIN	(		a,
			b
	)		((a) < (b) ? (a) : (b))

REGBYTES

#define REGBYTES   (1 << LOG_REGBYTES)

ROUNDDOWN

#define ROUNDDOWN	(		a,
			b
	)		((a)/(b)*(b))

ROUNDUP

#define ROUNDUP	(		a,
			b
	)		((((a)-1)/(b)+1)*(b))

SLL32

#define SLL32   sll

STORE

#define STORE   sw

STR

#define STR

(

x

)

XSTR(x)

unlikely

#define unlikely

(

x

)

__builtin_expect((x), 0)

XSTR

#define XSTR

(

x

)

#x