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Fix internal representation of fp80 to be the

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same as a normal i80 {low64, high16} rather
than its own {high64, low16}.  A depressing number
of places know about this; I think I got them all.
Bitcode readers and writers convert back to the old
form to avoid breaking compatibility.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67562 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen
2009-03-23 21:16:53 +00:00
parent ad20778705
commit 1b25cb2416
9 changed files with 97 additions and 27 deletions
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14
lib/Support/APFloat.cpp
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@ -2603,10 +2603,9 @@ APFloat::convertF80LongDoubleAPFloatToAPInt() const
}
uint64_t words[2];
words[0] = ((uint64_t)(sign & 1) << 63) |
((myexponent & 0x7fffLL) << 48) |
((mysignificand >>16) & 0xffffffffffffLL);
words[1] = mysignificand & 0xffff;
words[0] = mysignificand;
words[1] = ((uint64_t)(sign & 1) << 15) |
(myexponent & 0x7fffLL);
return APInt(80, 2, words);
}
@ -2764,14 +2763,13 @@ APFloat::initFromF80LongDoubleAPInt(const APInt &api)
assert(api.getBitWidth()==80);
uint64_t i1 = api.getRawData()[0];
uint64_t i2 = api.getRawData()[1];
uint64_t myexponent = (i1 >> 48) & 0x7fff;
uint64_t mysignificand = ((i1 << 16) & 0xffffffffffff0000ULL) |
(i2 & 0xffff);
uint64_t myexponent = (i2 & 0x7fff);
uint64_t mysignificand = i1;
initialize(&APFloat::x87DoubleExtended);
assert(partCount()==2);
sign = static_cast<unsigned int>(i1>>63);
sign = static_cast<unsigned int>(i2>>15);
if (myexponent==0 && mysignificand==0) {
// exponent, significand meaningless
category = fcZero;