peek_nbyte_next
b = peek_nbyte_next(insn_byte_t, insn, 1);
insn_byte_t b2 = peek_nbyte_next(insn_byte_t, insn, 1);
b2 = peek_nbyte_next(insn_byte_t, insn, 2);
b2 = peek_nbyte_next(insn_byte_t, insn, 3);
b2 = peek_nbyte_next(insn_byte_t, insn, 2);
#define peek_next(t, insn) peek_nbyte_next(t, insn, 0)
if (peek_nbyte_next(insn_byte_t, insn, i) != prefix[i])
b = peek_nbyte_next(insn_byte_t, insn, 1);
insn_byte_t b2 = peek_nbyte_next(insn_byte_t, insn, 1);
b2 = peek_nbyte_next(insn_byte_t, insn, 2);
b2 = peek_nbyte_next(insn_byte_t, insn, 3);
b2 = peek_nbyte_next(insn_byte_t, insn, 2);
#define peek_next(t, insn) peek_nbyte_next(t, insn, 0)
if (peek_nbyte_next(insn_byte_t, insn, i) != prefix[i])