linux/arch/arm/include/asm/hwcap.h

#ifndef __ASMARM_HWCAP_H
#define __ASMARM_HWCAP_H

/*
 * HWCAP flags - for elf_hwcap (in kernel) and AT_HWCAP
 */
#define HWCAP_SWP	1
#define HWCAP_HALF	2
#define HWCAP_THUMB	4
#define HWCAP_26BIT	8	/* Play it safe */
#define HWCAP_FAST_MULT	16
#define HWCAP_FPA	32
#define HWCAP_VFP	64
#define HWCAP_EDSP	128
#define HWCAP_JAVA	256
#define HWCAP_IWMMXT	512
#define HWCAP_CRUNCH	1024
#define HWCAP_THUMBEE	2048
#define HWCAP_NEON	4096
#define HWCAP_VFPv3	8192
#define HWCAP_VFPv3D16	16384

#if defined(__KERNEL__) && !defined(__ASSEMBLY__)
/*
 * This yields a mask that user programs can use to figure out what
 * instruction set this cpu supports.
 */
#define ELF_HWCAP	(elf_hwcap)
extern unsigned int elf_hwcap;
#endif

#endif