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Added handling of real-valued parameters/localparams

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This commit is contained in:
Clifford Wolf 2014-06-14 12:00:47 +02:00
parent fc7b6d172a
commit 9bd7d5c468
4 changed files with 62 additions and 24 deletions
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13
frontends/ast/ast.cc
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@ -185,6 +185,7 @@ AstNode::AstNode(AstNodeType type, AstNode *child1, AstNode *child2)
range_left = -1;
range_right = 0;
integer = 0;
realvalue = 0;
id2ast = NULL;
basic_prep = false;
@ -278,6 +279,8 @@ void AstNode::dumpAst(FILE *f, std::string indent)
fprintf(f, " range=[%d:%d]%s", range_left, range_right, range_valid ? "" : "!");
if (integer != 0)
fprintf(f, " int=%u", (int)integer);
if (realvalue != 0)
fprintf(f, " real=%e", realvalue);
fprintf(f, "\n");
for (auto &it : attributes) {
@ -775,18 +778,20 @@ double AstNode::asReal(bool is_signed)
RTLIL::Const val;
val.bits = bits;
double p = exp2(val.bits.size()-32);
double p = exp2(int(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());
val.bits.erase(val.bits.begin(), val.bits.begin()+(int(val.bits.size())-32));
int32_t v = val.as_int() << (32-int(val.bits.size()));
if (is_signed)
return v * p;
return uint32_t(v) * p;
}
if (type == AST_REALVALUE)
return realvalue;
return 0;
log_abort();
}
// create a new AstModule from an AST_MODULE AST node