SDT_OP_REGEX1
#define SDT_OP_REGEX1 "^(x[1-2]?[0-9]|3[0-1])$"
#define SDT_OP_REGEX1 "^(%r)?([1-2]?[0-9]|3[0-1])$"
#define SDT_OP_REGEX1 "^(ra|sp|gp|tp|t[0-6]|s[0-9]|s1[01]|a[0-7])$"
#define SDT_OP_REGEX1 "^(%r([0-9]|1[0-5]))$"