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Fixed sign handling in const eval of sshl and sshr

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This commit is contained in:
Clifford Wolf
2013-11-05 10:22:22 +01:00
parent 2b5f4d1df3
commit 27fec4e77c
1 changed files with 6 additions and 2 deletions
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8
kernel/calc.cc
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@@ -286,13 +286,17 @@ RTLIL::Const RTLIL::const_shr(const RTLIL::Const &arg1, const RTLIL::Const &arg2
return const_shift(arg1_ext, arg2, false, +1, result_len);
}
RTLIL::Const RTLIL::const_sshl(const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool, bool, int result_len)
RTLIL::Const RTLIL::const_sshl(const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len)
{
if (!signed1)
return const_shl(arg1, arg2, signed1, signed2, result_len);
return const_shift(arg1, arg2, true, -1, result_len);
}
RTLIL::Const RTLIL::const_sshr(const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool, bool, int result_len)
RTLIL::Const RTLIL::const_sshr(const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len)
{
if (!signed1)
return const_shr(arg1, arg2, signed1, signed2, result_len);
return const_shift(arg1, arg2, true, +1, result_len);
}