• Top
  • Documentation
  • Books
  • Recursion-and-induction
  • Boolean-reasoning
  • Projects
  • Debugging
  • Std
  • Proof-automation
  • Macro-libraries
  • ACL2
  • Interfacing-tools
  • Hardware-verification
    • Gl
    • Esim
    • Vl2014
    • Sv
    • Vwsim
    • Fgl
    • Vl
      • Syntax
      • Loader
      • Warnings
      • Getting-started
      • Utilities
      • Printer
      • Kit
      • Mlib
        • Scopestack
        • Hid-tools
        • Filtering-by-name
        • Vl-interface-mocktype
        • Stripping-functions
        • Genblob
        • Expr-tools
        • Hierarchy
        • Extract-vl-types
        • Range-tools
        • Finding-by-name
        • Stmt-tools
        • Modnamespace
        • Flat-warnings
        • Reordering-by-name
        • Datatype-tools
          • Vl-dimensionlist-total-size
          • Vl-maybe-usertype-resolve
          • Vl-dimensionlist-resolved-p
          • Vl-datatype-packedp
          • Vl-datatype-select-ok
          • Vl-dimension-size
          • Vl-datatype-size
          • Vl-maybe-dimension-size
          • Vl-hidexpr-name1
          • Maybe-nat-list
        • Syscalls
        • Allexprs
        • Lvalues
        • Port-tools
      • Transforms
    • X86isa
    • Svl
    • Rtl
  • Software-verification
  • Testing-utilities
  • Math

• Datatype-tools

Vl-datatype-select-ok

Determines whether this datatype can be selected.

Signature

(vl-datatype-select-ok x) → ok

Arguments

x — Guard (vl-datatype-p x).

The input datatype should not have packed or unpacked dimensions; if it does, then it's definitely OK to index into it (though it's only a select if it's the last packed dimension). The input datatype should have usertypes resolved.

Definitions and Theorems

Function: vl-datatype-select-ok

(defun
 vl-datatype-select-ok (x)
 (declare (xargs :guard (vl-datatype-p x)))
 (declare (xargs :guard (vl-datatype-resolved-p x)))
 (let
  ((__function__ 'vl-datatype-select-ok))
  (declare (ignorable __function__))
  (b*
   ((x (vl-maybe-usertype-resolve x)))
   (or
    (consp (vl-datatype->pdims x))
    (consp (vl-datatype->udims x))
    (vl-datatype-case
       x
       (:vl-coretype (b* (((vl-coredatatype-info xinfo)
                           (vl-coretypename->info x.name)))
                         (and xinfo.size (not (eql xinfo.size 1)))))
       (:vl-struct x.packedp)
       (:vl-union x.packedp)
       (:vl-enum t)
       (:vl-usertype (impossible)))))))

Theorem: vl-datatype-select-ok-of-vl-datatype-fix-x

(defthm vl-datatype-select-ok-of-vl-datatype-fix-x
        (equal (vl-datatype-select-ok (vl-datatype-fix x))
               (vl-datatype-select-ok x)))

Theorem: vl-datatype-select-ok-vl-datatype-equiv-congruence-on-x

(defthm vl-datatype-select-ok-vl-datatype-equiv-congruence-on-x
        (implies (vl-datatype-equiv x x-equiv)
                 (equal (vl-datatype-select-ok x)
                        (vl-datatype-select-ok x-equiv)))
        :rule-classes :congruence)