REGSZ
#define MKFSIZ(narg,locals) (((narg+locals)*REGSZ+31)&(~31))
#define KERN_REG_SIZE (NUMSAVEREGS * REGSZ)
REG_S reg, bo + (REGSZ * offs) (base)
REG_L reg, bo + (REGSZ * offs) (base)
#define _JB_REGS (3 * REGSZ)
#define _JB_FPREGS (37 * REGSZ)
#define _JB_MASK (1 * REGSZ)
#define _JB_PC (2 * REGSZ)