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Diffstat (limited to 'CHANGELOG.md')
| -rw-r--r-- | CHANGELOG.md | 35 |
1 files changed, 29 insertions, 6 deletions
diff --git a/CHANGELOG.md b/CHANGELOG.md index bab499f5..f468725d 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -4,9 +4,9 @@ Changelog Sail 0.8 -------- -###### More flexible type synonym syntax +##### More flexible type synonym syntax -Can now define type synonyms for kinds other than type. For example: +Can now define type synonyms for kinds other than `Type`. For example: ``` type xlen : Int = 64 type xlenbits = bits(xlen) @@ -38,7 +38,7 @@ constant x = <value> ``` is no longer supported. -###### Emacs mode improvements +##### Emacs mode improvements Can now use `C-c C-s` in Emacs to start a Sail interactive sub-process, assuming `sail` is available in `$PATH`. Using `C-c C-l` @@ -76,7 +76,7 @@ For this to work Sail must be build with interactive support as `make isail`. This requires the yojson library as a new dependency (`opam install yojson`). -###### Boolean constraints and type-variables +##### Boolean constraints and type-variables We now support Boolean type arguments in much the same way as numeric type arguments. Much like the type int('n), which means an integer @@ -118,7 +118,7 @@ x : bool = true // declaration of x x = false // fine because x can have any Boolean value ``` -###### Simpler implicit arguments +##### Simpler implicit arguments Function implicit arguments are now given explicitly in their type signatures so ``` @@ -142,7 +142,30 @@ to write both new and old-versions if desired for backwards compatibility, as the new version is syntactically valid in older Sails, but just doesn't typecheck. -###### Lem monad embedding changes +##### Parameterised bitfields + +Bitfields can now be parameterised in the following way: +``` +type xlenbits = bits(xlen) + +bitfield Mstatus : xlenbits = { + SD : xlen - ylen, + SXL : xlen - ylen - 1 .. xlen - ylen - 3 +} +``` + +This bitfield would then be valid for either +``` +type xlen : Int = 64 +type ylen : Int = 1 +``` +or +``` +type xlen : Int = 32 +type ylen : Int = 1 +``` + +##### Lem monad embedding changes The monad embedding for Lem has been changed to make it more friendly for theorem proving. This can break model-specific Lem that depends on |