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-rw-r--r--backends/cxxrtl/cxxrtl.h6
1 files changed, 4 insertions, 2 deletions
diff --git a/backends/cxxrtl/cxxrtl.h b/backends/cxxrtl/cxxrtl.h
index 0bde428c3..85f45ac7f 100644
--- a/backends/cxxrtl/cxxrtl.h
+++ b/backends/cxxrtl/cxxrtl.h
@@ -377,10 +377,12 @@ struct value : public expr_base<value<Bits>> {
: data[chunks - 1 - n] << (chunk::bits - shift_bits);
}
if (Signed && is_neg()) {
- for (size_t n = chunks - shift_chunks; n < chunks; n++)
+ size_t top_chunk_idx = (Bits - shift_bits) / chunk::bits;
+ size_t top_chunk_bits = (Bits - shift_bits) % chunk::bits;
+ for (size_t n = top_chunk_idx + 1; n < chunks; n++)
result.data[n] = chunk::mask;
if (shift_bits != 0)
- result.data[chunks - shift_chunks] |= chunk::mask << (chunk::bits - shift_bits);
+ result.data[top_chunk_idx] |= chunk::mask << top_chunk_bits;
}
return result;
}