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authorClifford Wolf <clifford@clifford.at>2013-06-10 17:10:06 +0200
committerClifford Wolf <clifford@clifford.at>2013-06-10 17:10:06 +0200
commita5c30183b5fba4d7af4fb6c908cca5c5515e3089 (patch)
tree4463e652a2ba987c2cbcbb73f142352e4c91558a /kernel
parent90265118215ae74384732edc9cf3fb57b6978756 (diff)
Sign-extension related fixes in SatGen and AST frontend
Diffstat (limited to 'kernel')
-rw-r--r--kernel/satgen.h16
1 files changed, 8 insertions, 8 deletions
diff --git a/kernel/satgen.h b/kernel/satgen.h
index 5b3a4d04..fcbdcc14 100644
--- a/kernel/satgen.h
+++ b/kernel/satgen.h
@@ -76,15 +76,13 @@ struct SatGen
void extendSignalWidth(std::vector<int> &vec_a, std::vector<int> &vec_b, RTLIL::Cell *cell, size_t y_width = 0)
{
- bool is_signed_a = false, is_signed_b = false;
- if (cell->parameters.count("\\A_SIGNED") > 0)
- is_signed_a = cell->parameters["\\A_SIGNED"].as_bool();
- if (cell->parameters.count("\\B_SIGNED") > 0)
- is_signed_b = cell->parameters["\\B_SIGNED"].as_bool();
+ bool is_signed = false;
+ if (cell->parameters.count("\\A_SIGNED") > 0 && cell->parameters.count("\\B_SIGNED") > 0)
+ is_signed = cell->parameters["\\A_SIGNED"].as_bool() && cell->parameters["\\B_SIGNED"].as_bool();
while (vec_a.size() < vec_b.size() || vec_a.size() < y_width)
- vec_a.push_back(is_signed_a && vec_a.size() > 0 ? vec_a.back() : ez->FALSE);
+ vec_a.push_back(is_signed && vec_a.size() > 0 ? vec_a.back() : ez->FALSE);
while (vec_b.size() < vec_a.size() || vec_b.size() < y_width)
- vec_b.push_back(is_signed_b && vec_b.size() > 0 ? vec_b.back() : ez->FALSE);
+ vec_b.push_back(is_signed && vec_b.size() > 0 ? vec_b.back() : ez->FALSE);
}
void extendSignalWidth(std::vector<int> &vec_a, std::vector<int> &vec_b, std::vector<int> &vec_y, RTLIL::Cell *cell)
@@ -222,9 +220,11 @@ struct SatGen
std::vector<int> b = importSigSpec(cell->connections.at("\\B"), timestep);
std::vector<int> y = importSigSpec(cell->connections.at("\\Y"), timestep);
char shift_left = cell->type == "$shl" || cell->type == "$sshl";
- bool sign_extend = cell->type == "$sshr";
+ bool sign_extend = cell->type == "$sshr" && cell->parameters["\\A_SIGNED"].as_bool();
while (y.size() < a.size())
y.push_back(ez->literal());
+ while (y.size() > a.size())
+ a.push_back(cell->parameters["\\A_SIGNED"].as_bool() ? a.back() : ez->FALSE);
std::vector<int> tmp = a;
for (size_t i = 0; i < b.size(); i++)
{