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opt_expr: Fix mul/div/mod by POT patterns to support >= 32 bits.

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The previous code, in addition to being needlessly limitted to 32 bits
in the first place, also had UB for the 31th bit (doing 1 << 31).
This commit is contained in:
Marcelina Kościelnicka
2021-06-09 19:53:44 +02:00
parent 12b3a9765d
commit 1667ad658b
3 changed files with 122 additions and 124 deletions
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kernel/rtlil.h
+2
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@@ -662,6 +662,7 @@ struct RTLIL::Const
bool is_fully_ones() const;
bool is_fully_def() const;
bool is_fully_undef() const;
bool is_onehot(int *pos = nullptr) const;
inline RTLIL::Const extract(int offset, int len = 1, RTLIL::State padding = RTLIL::State::S0) const {
RTLIL::Const ret;
@@ -934,6 +935,7 @@ public:
bool is_fully_undef() const;
bool has_const() const;
bool has_marked_bits() const;
bool is_onehot(int *pos = nullptr) const;
bool as_bool() const;
int as_int(bool is_signed = false) const;