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Add bitsToDouble and bitsToFloat methods for re-interpretation of bits as FP.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34800 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer 2007-03-01 20:06:51 +00:00
parent 1ede29c951
commit ab2ed8ec85
1 changed files with 26 additions and 0 deletions
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26
include/llvm/ADT/APInt.h
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@ -697,6 +697,32 @@ public:
return roundToDouble(true);
}
/// The conversion does not do a translation from integer to double, it just
/// re-interprets the bits as a double. Note that it is valid to do this on
/// any bit width. Exactly 64 bits will be translated.
/// @brief Converts APInt bits to a double
double bitsToDouble() const {
union {
uint64_t I;
double D;
} T;
T.I = (isSingleWord() ? VAL : pVal[0]);
return T.D;
}
/// The conversion does not do a translation from integer to float, it just
/// re-interprets the bits as a float. Note that it is valid to do this on
/// any bit width. Exactly 32 bits will be translated.
/// @brief Converts APInt bits to a double
float bitsToFloat() const {
union {
uint32_t I;
float F;
} T;
T.I = uint32_t((isSingleWord() ? VAL : pVal[0]));
return T.F;
}
/// @brief Compute the square root
APInt sqrt() const;
};