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cxxrtl: fix sshr sign-extension.

This commit is contained in:
Mike Walters 2020-06-14 14:42:20 +01:00
parent dc6961f3d4
commit 66a2de2912
1 changed files with 4 additions and 2 deletions
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6
backends/cxxrtl/cxxrtl.h
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@ -376,10 +376,12 @@ 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;
}