source: src/CHANGES @ 781

Last change on this file since 781 was 774, checked in by campbell, 9 years ago

Separate out the different forms of addition and subtraction in the frontend ops.

File size: 1.6 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
43  Remove register from RTLabs return statements because it ends up being
44  redundant (we always use the register in the function record).
46  The constants follow CompCert's rather than the prototype's with the result
47  that they match up more closely with the addressing modes in RTLabs.
49  One of the front end operations for subtraction (subpp) appears to be missing
50  from the prototype at present.
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