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[APFloat] Added support for parsing float strings which contain {inf,-inf,NaN,-NaN}.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184713 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -510,6 +510,7 @@ private:
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/// \name Miscellany
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/// @{
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bool convertFromStringSpecials(StringRef str);
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opStatus normalize(roundingMode, lostFraction);
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opStatus addOrSubtract(const APFloat &, roundingMode, bool subtract);
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cmpResult compareAbsoluteValue(const APFloat &) const;
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@ -2575,11 +2575,40 @@ APFloat::convertFromDecimalString(StringRef str, roundingMode rounding_mode)
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return fs;
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}
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bool
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APFloat::convertFromStringSpecials(StringRef str) {
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if (str.equals("inf") || str.equals("INFINITY")) {
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makeInf(false);
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return true;
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}
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if (str.equals("-inf") || str.equals("-INFINITY")) {
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makeInf(true);
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return true;
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}
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if (str.equals("nan") || str.equals("NaN")) {
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makeNaN(false, false);
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return true;
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}
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if (str.equals("-nan") || str.equals("-NaN")) {
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makeNaN(false, true);
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return true;
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}
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return false;
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}
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APFloat::opStatus
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APFloat::convertFromString(StringRef str, roundingMode rounding_mode)
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{
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assert(!str.empty() && "Invalid string length");
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// Handle special cases.
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if (convertFromStringSpecials(str))
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return opOK;
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/* Handle a leading minus sign. */
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StringRef::iterator p = str.begin();
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size_t slen = str.size();
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