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Add support to APInt for shift and rotate operations with APInt 

instead of uint32_t for the shift/rotate count operand type.

llvm-svn: 47741
This commit is contained in:
Dan Gohman 2008-02-29 01:40:47 +00:00
parent 17df4cd397
commit 105c1d4106
2 changed files with 49 additions and 0 deletions
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22
llvm/include/llvm/ADT/APInt.h
View File

@ -584,6 +584,10 @@ public:
return shl(Bits);
}
APInt operator<<(const APInt &Bits) const {
return shl(Bits);
}
/// Arithmetic right-shift this APInt by shiftAmt.
/// @brief Arithmetic right-shift function.
APInt ashr(uint32_t shiftAmt) const;
@ -602,6 +606,24 @@ public:
/// @brief Rotate right by rotateAmt.
APInt rotr(uint32_t rotateAmt) const;
/// Arithmetic right-shift this APInt by shiftAmt.
/// @brief Arithmetic right-shift function.
APInt ashr(const APInt &shiftAmt) const;
/// Logical right-shift this APInt by shiftAmt.
/// @brief Logical right-shift function.
APInt lshr(const APInt &shiftAmt) const;
/// Left-shift this APInt by shiftAmt.
/// @brief Left-shift function.
APInt shl(const APInt &shiftAmt) const;
/// @brief Rotate left by rotateAmt.
APInt rotl(const APInt &rotateAmt) const;
/// @brief Rotate right by rotateAmt.
APInt rotr(const APInt &rotateAmt) const;
/// Perform an unsigned divide operation on this APInt by RHS. Both this and
/// RHS are treated as unsigned quantities for purposes of this division.
/// @returns a new APInt value containing the division result

27
llvm/lib/Support/APInt.cpp
View File

@ -1083,6 +1083,12 @@ APInt &APInt::sextOrTrunc(uint32_t width) {
return *this;
}
/// Arithmetic right-shift this APInt by shiftAmt.
/// @brief Arithmetic right-shift function.
APInt APInt::ashr(const APInt &shiftAmt) const {
return ashr(shiftAmt.getLimitedValue(BitWidth));
}
/// Arithmetic right-shift this APInt by shiftAmt.
/// @brief Arithmetic right-shift function.
APInt APInt::ashr(uint32_t shiftAmt) const {
@ -1166,6 +1172,12 @@ APInt APInt::ashr(uint32_t shiftAmt) const {
return APInt(val, BitWidth).clearUnusedBits();
}
/// Logical right-shift this APInt by shiftAmt.
/// @brief Logical right-shift function.
APInt APInt::lshr(const APInt &shiftAmt) const {
return ashr(shiftAmt.getLimitedValue(BitWidth));
}
/// Logical right-shift this APInt by shiftAmt.
/// @brief Logical right-shift function.
APInt APInt::lshr(uint32_t shiftAmt) const {
@ -1228,6 +1240,13 @@ APInt APInt::lshr(uint32_t shiftAmt) const {
return APInt(val, BitWidth).clearUnusedBits();
}
/// Left-shift this APInt by shiftAmt.
/// @brief Left-shift function.
APInt APInt::shl(const APInt &shiftAmt) const {
// It's undefined behavior in C to shift by BitWidth or greater, but
return shl(shiftAmt.getLimitedValue(BitWidth));
}
/// Left-shift this APInt by shiftAmt.
/// @brief Left-shift function.
APInt APInt::shl(uint32_t shiftAmt) const {
@ -1287,6 +1306,10 @@ APInt APInt::shl(uint32_t shiftAmt) const {
return APInt(val, BitWidth).clearUnusedBits();
}
APInt APInt::rotl(const APInt &rotateAmt) const {
return rotl(rotateAmt.getLimitedValue(BitWidth));
}
APInt APInt::rotl(uint32_t rotateAmt) const {
if (rotateAmt == 0)
return *this;
@ -1298,6 +1321,10 @@ APInt APInt::rotl(uint32_t rotateAmt) const {
return hi | lo;
}
APInt APInt::rotr(const APInt &rotateAmt) const {
return rotr(rotateAmt.getLimitedValue(BitWidth));
}
APInt APInt::rotr(uint32_t rotateAmt) const {
if (rotateAmt == 0)
return *this;