__sys_reg2
register long _sys_arg2 asm(__sys_reg2) = (long)(a2); \
register long _sys_arg2 asm(__sys_reg2) = (long)(a2); \
register long _sys_arg2 asm(__sys_reg2) = (long)(a2); \
register long _sys_arg2 asm(__sys_reg2) = (long)(a2); \