What does this character mean in DLX's md file?

I've been studying DLX's md file for GCC. I have a question about the following lines in this file, ;; ;; Float compares. ;; The RTL for these is also generated in ;; gen_conditional_branch(). ;; (define_insn "" [(set (match_operand:CCFP 0 "register_operand" "=z") (match_operator:SF 1

What does this character mean in gcc's md file?

I've been studying DLX's md file for GCC. I have a question about the following lines in this file, ;; ;; Float compares. ;; The RTL for these is also generated in ;; gen_conditional_branch(). ;; (define_insn "" [(set (match_operand:CCFP 0 "register_operand" "=z") (match_operator:SF 1

Any who heard about genmd?

A tool developed by Indian Institute of Technology Kanpur, which takes architecture description represented using Sim-nML as input and generates GCC md as output. I have been searching for source code of this tool. Anyone who has the source code, please send me a copy. __