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how to implement general macro-insn expansion?
Doug,
I found this comment in opc-itab.scm before the definition of
`-gen-macro-insn-table':
; The general form is a Scheme expression that is interpreted at runtime to
; decide how to perform the expansion. Yes, that means having a (perhaps
; minimal) Scheme interpreter in the assembler.
I hope the idea of having a scheme interpreter in the assembler is
outdated. My plan was to reuse as much of rtl-c.scm as possible to
generate something analogous to sem-switch.c for the gas-runtime
stuff.
; Another thing to do is have a builder for each real insn so instead of
; expanding to text, the macro-expansion could invoke the builder for each
; expanded-to insn.
I don't understand this statement. Could you elaborate?
Thanks,
Greg