search for: apfloat

...>hasFloatingPointExceptions(); ConstantFPSDNode *N1CFP = dyn_cast<ConstantFPSDNode>(N1.getNode()); ConstantFPSDNode *N2CFP = dyn_cast<ConstantFPSDNode>(N2.getNode()); if (N1CFP) { @@ -3415,28 +3416,32 @@ switch (Opcode) { case ISD::FADD: s = V1.add(V2, APFloat::rmNearestTiesToEven); - if (s != APFloat::opInvalidOp) + if (!HasFPExceptions || s != APFloat::opInvalidOp) return getConstantFP(V1, VT); break; case ISD::FSUB: s = V1.subtract(V2, APFloat::rmNearestTiesToEven); - if (s!=APFloat::opInvalidOp...

Hi, I've been playing around with the APFloat class lately and I came across behavior I was not expecting based on reading the implementation comments and I'm wondering if it's a bug or intentional. The behavior concerns converting an APFloat to a string and back again. In the implementation of ``APFloat::toString(...)`` you can speci...

...Node *N1CFP = dyn_cast<ConstantFPSDNode>(N1.getNode()); >> ConstantFPSDNode *N2CFP = dyn_cast<ConstantFPSDNode>(N2.getNode()); >> if (N1CFP) { >> @@ -3415,28 +3416,32 @@ >> switch (Opcode) { >> case ISD::FADD: >> s = V1.add(V2, APFloat::rmNearestTiesToEven); >> - if (s != APFloat::opInvalidOp) >> + if (!HasFPExceptions || s != APFloat::opInvalidOp) >> return getConstantFP(V1, VT); >> break; >> case ISD::FSUB: >> s = V1.subtract(V2, APFloat::rmNeares...

This patch supplies software IEEE floating point support. The comment from the patch reproduced below says all there is to say. This patch contains the prior "cleanup" patch; please don't apply that one. Please let me know of any bugs. It is tested reasonably well, but until I put together random tests it's hard to have 100% confidence. Neil. /* A self-contained host- and

>> >> I wonder why APFloat::convertToDouble asserts if it is not an >> APFloat::IEEEdouble while the name "convertToDouble" suggests that it >> converts when it is not a double. > > The conversion is to (host) double, as the name implies. Among > APFloat types, that is only implemented for AP...

...he sum of two > double-precision numbers, and the various arithmetic operations are formed > mostly in terms of double-precision arithmetic on the elements of the > pairs. As a result, I suspect we really just want to store the two > double-precision numbers, and essentially delegate to APFloat IEEEdouble in > the implementation of the various operations. > > As such, one option might be that, when PPCDoubleDouble fltSemantics are > selected, the exponent and sign are ignored, and we just store the data for > the two double-precision floating-point numbers in the significan...

I have found some internal test failures due to the wrong constant folding on ppc_fp128. As documented in APFloat::PPCDoubleDouble, APFloat doesn't support PowerPC double-double correctly < https://github.com/llvm-mirror/llvm/blob/492acdd450bcdf9837494d6da029ed064f14fc33/lib/Support/APFloat.cpp#L74 >. To support this, we need to add a second tuple of (sign, exponent, significand) to APFloat. I wonde...

Hi, I'm trying to separate the Support, System, ADT and Config header files into the support module, per previous plans. However, APFloat.h is not self-contained: APFloat.h:105:43: error: llvm/Bitcode/SerializationFwd.h: No such file or directory APFloat.h:106:37: error: llvm/CodeGen/ValueTypes.h: No such file or directory As you can see, APFloat.h depends on things that are not in the ADT, Support, or System header files. This, in...

On Dec 8, 2007, at 1:13 AM, Reid Spencer wrote: > Hi, > > I'm trying to separate the Support, System, ADT and Config header > files > into the support module, per previous plans. However, APFloat.h is not > self-contained: > > APFloat.h:105:43: error: llvm/Bitcode/SerializationFwd.h: No such file > or directory > APFloat.h:106:37: error: llvm/CodeGen/ValueTypes.h: No such file or > directory > > As you can see, APFloat.h depends on things that are not in the ADT, &gt...

llvm[1]: Compiling APFloat.cpp for Release+Asserts build clang: TargetInfo.cpp:1778: llvm::Type *GetX86_64ByValArgumentPair(llvm::Type *, llvm::Type *, const llvm::TargetData &): Assertion `Lo->isIntegerTy() && "Invalid/unknown lo type"' failed. 0 clang 0x0000000001c132ef 1 clang...

...On Sat, 2007-12-08 at 06:59 -0800, Ted Kremenek wrote: > On Dec 8, 2007, at 1:13 AM, Reid Spencer wrote: > > > Hi, > > > > I'm trying to separate the Support, System, ADT and Config header > > files > > into the support module, per previous plans. However, APFloat.h is not > > self-contained: > > > > APFloat.h:105:43: error: llvm/Bitcode/SerializationFwd.h: No such file > > or directory > > APFloat.h:106:37: error: llvm/CodeGen/ValueTypes.h: No such file or > > directory > > > > As you can see, APFloat.h depend...

On Jul 9, 2010, at 12:59 PMPDT, Jochen Wilhelmy wrote: >>> I wonder why APFloat::convertToDouble asserts if it is not an >>> APFloat::IEEEdouble while the name "convertToDouble" suggests that >>> it >>> converts when it is not a double. >> >> The conversion is to (host) double, as the name implies. Among >> APFloat ty...

Hi! I wonder why APFloat::convertToDouble asserts if it is not an APFloat::IEEEdouble while the name "convertToDouble" suggests that it converts when it is not a double. -Jochen

> I'd rather not. The functionality you want is there, feed another > APFloat type through APFloat::convert first. > > Using host FP is not something that should be encouraged; the main > point of APFloat is so people don't have to do that. Why do you want > to, btw? > Yes, i got it working using APFloat::convert. I need host float to output to my bac...

On Jul 9, 2010, at 7:59 AMPDT, Jochen Wilhelmy wrote: > Hi! > > I wonder why APFloat::convertToDouble asserts if it is not an > APFloat::IEEEdouble while the name "convertToDouble" suggests that it > converts when it is not a double. The conversion is to (host) double, as the name implies. Among APFloat types, that is only implemented for APFloat::IEEEdouble.

On Dec 8, 2007, at 11:33 AM, Reid Spencer wrote: > Okay, but I imagine that leaves it still being used in APFloat.cpp > which > is also trying to be segregated to the support module. >> >> If this doesn't seem like a clean enough solution, there are other >> ways to potentially decouple APFloat more from the Serialization >> "library." The tradeoff is that it woul...

...ndrik at lovesong:~/dv/llvm/tut$ g++ -g toy.cpp `llvm-config --cppflags --ldflags --libs core jit native` -O3 -o toy toy.cpp: In member function ‘virtual llvm::Value* NumberExprAST::Codegen()’: toy.cpp:359: error: no matching function for call to ‘llvm::ConstantFP::get(const llvm::Type*&, llvm::APFloat)’ /usr/local/llvm/include/llvm/Constants.h:237: note: candidates are: static llvm::ConstantFP* llvm::ConstantFP::get(const llvm::APFloat&) /usr/local/llvm/include/llvm/Constants.h:242: note: static llvm::ConstantFP* llvm::ConstantFP::get(const llvm::Type*, double) hendrik at lov...

On Jul 9, 2010, at 1:20 PMPDT, Jochen Wilhelmy wrote: >> I'd rather not. The functionality you want is there, feed another >> APFloat type through APFloat::convert first. >> >> Using host FP is not something that should be encouraged; the main >> point of APFloat is so people don't have to do that. Why do you >> want to, btw? > > Yes, i got it working using APFloat::convert. I need host floa...

Hi @llvm, I stumbled over a strange behavior if a float containing a NaN is printed (e.g. in the clang rewriter). The local template method "append" in APFloat.cpp deduces the size from the char array, which for "NaN" is 4 (including the trailing zero). If APFloat::toString is called with a SmallString and then SmallString::str() is called, it returns "NaN\0". I guess that this is not intended. Maybe it can be fixed by the simple p...

Hello, I'm playing with llvm/clang and I have a problem when I try to use the -ast-print options for a file that uses long double. The Basic/Targets.cpp file defined the x86 (and x86_64) long double type as APFloat::x87DoubleExtended. Then, when the AST printer try to write a long double literal value (using VisitFloatingLiteral()), it call FloatingLiteral- >getValueAsDouble() and the later does not support long double, so it try to call convertToDouble() as a fallback and crash due to an invalid a...