+void
+APFloat::initFromQuadrupleAPInt(const APInt &api)
+{
+ assert(api.getBitWidth()==128);
+ uint64_t i1 = api.getRawData()[0];
+ uint64_t i2 = api.getRawData()[1];
+ uint64_t myexponent = (i2 >> 48) & 0x7fff;
+ uint64_t mysignificand = i1;
+ uint64_t mysignificand2 = i2 & 0xffffffffffffLL;
+
+ initialize(&APFloat::IEEEquad);
+ assert(partCount()==2);
+
+ sign = static_cast<unsigned int>(i2>>63);
+ if (myexponent==0 &&
+ (mysignificand==0 && mysignificand2==0)) {
+ // exponent, significand meaningless
+ category = fcZero;
+ } else if (myexponent==0x7fff &&
+ (mysignificand==0 && mysignificand2==0)) {
+ // exponent, significand meaningless
+ category = fcInfinity;
+ } else if (myexponent==0x7fff &&
+ (mysignificand!=0 || mysignificand2 !=0)) {
+ // exponent meaningless
+ category = fcNaN;
+ significandParts()[0] = mysignificand;
+ significandParts()[1] = mysignificand2;
+ } else {
+ category = fcNormal;
+ exponent = myexponent - 16383;
+ significandParts()[0] = mysignificand;
+ significandParts()[1] = mysignificand2;
+ if (myexponent==0) // denormal
+ exponent = -16382;
+ else
+ significandParts()[1] |= 0x1000000000000LL; // integer bit
+ }
+}
+