R0
#define R0 (regs->regs[0])
#define R0 %rax
R0 = 0, R1,
#define R0 0 /* Register selects */
enum { R0 = 0, R1, R2, REG_MAX };
#define R0 0 /* Register selects */
#define R0 0 /* Register selects */
#define R0 0 /* Register selects */
#define R0 0 /* Register selects */
#define R0 BPF_REG_0
#define R0 0x00
#define R0 0