Insert / Extract Bit-fields and Bits

Collaboration diagram for Insert / Extract Bit-fields and Bits:

Macros
#define	__getbit(address, bitoffset)   ((*(address) & (1U << (bitoffset))) != 0)
#define	__imaskldmst(address, value, bitoffset, bits)
#define	__putbit(value, address, bitoffset)   __imaskldmst(address, value, bitoffset,1)

Functions
IFX_INLINE sint32	__extr (sint32 a, uint32 p, uint32 w)
IFX_INLINE uint32	__extru (uint32 a, uint32 p, uint32 w)
IFX_INLINE sint32	__ins (sint32 trg, const sint32 trgbit, sint32 src, const sint32 srcbit)
IFX_INLINE sint32	__insert (sint32 a, sint32 b, sint32 p, const sint32 w)
IFX_INLINE sint32	__insn (sint32 trg, const sint32 trgbit, sint32 src, const sint32 srcbit)

Detailed Description

Macro Definition Documentation

#define __getbit	(		address,
			bitoffset
	)		((*(address) & (1U << (bitoffset))) != 0)

Load a single bit.

Definition at line 371 of file IfxCpu_IntrinsicsGnuc.h.

#define __imaskldmst	(		address,
			value,
			bitoffset,
			bits
	)

Value:

{long long tmp;\
  __asm__("imask %A0,%1,%2,%3"\
          :"=d"((long long)tmp)\
          :"d"(value),"d"(bitoffset),"i"(bits): "memory");\
  __asm__("ldmst [%0]0,%A1"::"a"(address),"d"(tmp): "memory");}

Atomic load-modify-store.

Definition at line 375 of file IfxCpu_IntrinsicsGnuc.h.

#define __putbit	(		value,
			address,
			bitoffset
	)		__imaskldmst(address, value, bitoffset,1)

Store a single bit.

Definition at line 414 of file IfxCpu_IntrinsicsGnuc.h.

Function Documentation

IFX_INLINE sint32 __extr	(	sint32	a,
		uint32	p,
		uint32	w
	)

Extract a bit-field (bit pos to bit pos+width) from value

Definition at line 346 of file IfxCpu_IntrinsicsGnuc.h.

IFX_INLINE uint32 __extru	(	uint32	a,
		uint32	p,
		uint32	w
	)

Same as __extr() but return bit-field as unsigned integer

Definition at line 358 of file IfxCpu_IntrinsicsGnuc.h.

IFX_INLINE sint32 __ins	(	sint32	trg,
		const sint32	trgbit,
		sint32	src,
		const sint32	srcbit
	)

Return trg but replace trgbit by srcbit in src.

Definition at line 384 of file IfxCpu_IntrinsicsGnuc.h.

IFX_INLINE sint32 __insert	(	sint32	a,
		sint32	b,
		sint32	p,
		const sint32	w
	)

Extract bit-field (width bits starting at bit 0) from src and insert it in trg at pos.

Definition at line 393 of file IfxCpu_IntrinsicsGnuc.h.

IFX_INLINE sint32 __insn	(	sint32	trg,
		const sint32	trgbit,
		sint32	src,
		const sint32	srcbit
	)

Return trg but replace trgbit by inverse of srcbit in src.

Definition at line 405 of file IfxCpu_IntrinsicsGnuc.h.