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Added proper === and !== support in constant expressions

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This commit is contained in:
Clifford Wolf 2013-12-27 13:50:08 +01:00
parent 11ffa78677
commit ecc30255ba
9 changed files with 79 additions and 15 deletions
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16
frontends/ast/simplify.cc
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@ -299,6 +299,8 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
case AST_LE:
case AST_EQ:
case AST_NE:
case AST_EQX:
case AST_NEX:
case AST_GE:
case AST_GT:
width_hint = -1;
@ -1258,12 +1260,14 @@ skip_dynamic_range_lvalue_expansion:;
newNode = mkconst_bits(y.bits, sign_hint);
}
break;
if (0) { case AST_LT: const_func = RTLIL::const_lt; }
if (0) { case AST_LE: const_func = RTLIL::const_le; }
if (0) { case AST_EQ: const_func = RTLIL::const_eq; }
if (0) { case AST_NE: const_func = RTLIL::const_ne; }
if (0) { case AST_GE: const_func = RTLIL::const_ge; }
if (0) { case AST_GT: const_func = RTLIL::const_gt; }
if (0) { case AST_LT: const_func = RTLIL::const_lt; }
if (0) { case AST_LE: const_func = RTLIL::const_le; }
if (0) { case AST_EQ: const_func = RTLIL::const_eq; }
if (0) { case AST_NE: const_func = RTLIL::const_ne; }
if (0) { case AST_EQX: const_func = RTLIL::const_eqx; }
if (0) { case AST_NEX: const_func = RTLIL::const_nex; }
if (0) { case AST_GE: const_func = RTLIL::const_ge; }
if (0) { case AST_GT: const_func = RTLIL::const_gt; }
if (children[0]->type == AST_CONSTANT && children[1]->type == AST_CONSTANT) {
int cmp_width = std::max(children[0]->bits.size(), children[1]->bits.size());
bool cmp_signed = children[0]->is_signed && children[1]->is_signed;