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Add $cover cell type and SVA cover() support

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This commit is contained in:
Clifford Wolf 2017-02-04 14:14:26 +01:00
parent 911c44d164
commit 3928482a3c
14 changed files with 38 additions and 9 deletions
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1
frontends/ast/ast.cc
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@ -84,6 +84,7 @@ std::string AST::type2str(AstNodeType type)
X(AST_PREFIX)
X(AST_ASSERT)
X(AST_ASSUME)
X(AST_COVER)
X(AST_FCALL)
X(AST_TO_BITS)
X(AST_TO_SIGNED)

1
frontends/ast/ast.h
View file

@ -65,6 +65,7 @@ namespace AST
AST_PREFIX,
AST_ASSERT,
AST_ASSUME,
AST_COVER,
AST_FCALL,
AST_TO_BITS,

2
frontends/ast/genrtlil.cc
View file

@ -1336,9 +1336,11 @@ RTLIL::SigSpec AstNode::genRTLIL(int width_hint, bool sign_hint)
// generate $assert cells
case AST_ASSERT:
case AST_ASSUME:
case AST_COVER:
{
const char *celltype = "$assert";
if (type == AST_ASSUME) celltype = "$assume";
if (type == AST_COVER) celltype = "$cover";
log_assert(children.size() == 2);

4
frontends/ast/simplify.cc
View file

@ -1400,7 +1400,7 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
}
skip_dynamic_range_lvalue_expansion:;
if (stage > 1 && (type == AST_ASSERT || type == AST_ASSUME) && current_block != NULL)
if (stage > 1 && (type == AST_ASSERT || type == AST_ASSUME || type == AST_COVER) && current_block != NULL)
{
std::stringstream sstr;
sstr << "$formal$" << filename << ":" << linenum << "$" << (autoidx++);
@ -1462,7 +1462,7 @@ skip_dynamic_range_lvalue_expansion:;
goto apply_newNode;
}
if (stage > 1 && (type == AST_ASSERT || type == AST_ASSUME) && children.size() == 1)
if (stage > 1 && (type == AST_ASSERT || type == AST_ASSUME || type == AST_COVER) && children.size() == 1)
{
children.push_back(mkconst_int(1, false, 1));
did_something = true;