source: src/CHANGES @ 763

Last change on this file since 763 was 750, checked in by campbell, 9 years ago

Track some of the changes to the prototype in RTLabs.

Just one register in each place now, f_ptrs is present but not checked.
The changes to memory quantities have been glossed over for now.
A new difference from the prototype: return registers are optional.

File size: 1.2 KB
2  Label moved out of labelled_instruction datatype, as the Paris compiler
3  can only produce at most one label per instruction emitted.
5  Merged the LTL and LIN datatypes.
7  Added comments to the ASM datatypes.
9  Changed identifiers from bytes to words.
11  Formalised missing file.
14  Split translate_statements into two functions.
16  Added a dependent type for the invariant that a LIN function body does not
17  start with a label, and is not empty.
20  In retrospect:
22  The Clight semantics are based on CompCert 1.6 rather than the prototype's;
23  this also affects some of the common files.
25    The identifiers are Words so that we can use BitVectorTries for maps.
26    Similarly, integers are based on BitVectors rather than Coq-style binary
27    integers + range proof.
29  8051 memory spaces are present, but are not (yet?) in the prototype.
31  Dependent types are used to fix the number of arguments for addressing modes
32  in RTLabs.
35  common/ provides identifiers similar to atomSig in the
36  prototype, except that we use the universe's name as a tag for the type of
37  identifiers to provide some extra type safety.
40  Make return register optional in RTLabs
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