diff options
Diffstat (limited to 'frontends/ast/ast.cc')
| -rw-r--r-- | frontends/ast/ast.cc | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/frontends/ast/ast.cc b/frontends/ast/ast.cc index 1ce7efc84..3af08b9d1 100644 --- a/frontends/ast/ast.cc +++ b/frontends/ast/ast.cc @@ -32,7 +32,7 @@ #include <sstream> #include <stdarg.h> -#include <assert.h> +#include <math.h> using namespace AST; using namespace AST_INTERNAL; @@ -760,6 +760,35 @@ bool AstNode::asBool() return false; } +int AstNode::isConst() +{ + if (type == AST_CONSTANT) + return 1; + if (type == AST_REALVALUE) + return 2; + return 0; +} + +double AstNode::asReal(bool is_signed) +{ + if (type == AST_CONSTANT) { + RTLIL::Const val; + val.bits = bits; + + double p = exp2(val.bits.size()-32); + if (val.bits.size() > 32) + val.bits.erase(val.bits.begin(), val.bits.begin()+(val.bits.size()-32)); + int32_t v = val.as_int() << (32-val.bits.size()); + + if (is_signed) + return v * p; + return uint32_t(v) * p; + } + if (type == AST_REALVALUE) + return realvalue; + return 0; +} + // create a new AstModule from an AST_MODULE AST node static AstModule* process_module(AstNode *ast, bool defer) { |