[Lldb-commits] [lldb] r183716 - <rdar://problem/12783351>

[Greg Clayton]

I have a patch almost ready that adopts llvm::APFloat. There are some troubles currently where clang is asserting that I need to clean up and verify with people in the know, but I will have this is soon.

Greg

On Jun 11, 2013, at 10:46 AM, Enrico Granata <egranata at apple.com> wrote:

> I got the code from Ian Ollman - he sent it as part of the radar :)
> I could well switch over to llvm::APFloat if it does support printing! (as Greg’s followup email seems to imply)
> 
> Enrico Granata
> 📩 egranata@.com
> ☎️ 27683
> 
> On Jun 10, 2013, at 8:48 PM, Chris Lattner <clattner at apple.com> wrote:
> 
>> 
>> On Jun 10, 2013, at 5:18 PM, Enrico Granata <egranata at apple.com> wrote:
>> 
>>> +++ lldb/trunk/source/Core/DataExtractor.cpp Mon Jun 10 19:18:18 2013
>>> @@ -1302,6 +1302,22 @@ DumpAPInt (Stream *s, const DataExtracto
>>>    return offset;
>>> }
>>> 
>>> +static float half2float (uint16_t half)
>>> +{
>>> +    union{ float       f; uint32_t    u;}u;
>>> +    int32_t v = (int16_t) half;
>>> +    
>>> +    if( 0 == (v & 0x7c00))
>>> +    {
>>> +        u.u = v & 0x80007FFFU;
>>> +        return u.f * 0x1.0p125f;
>>> +    }
>>> +    
>>> +    v <<= 13;
>>> +    u.u = v | 0x70000000U;
>>> +    return u.f * 0x1.0p-112f;
>>> +}
>>> +
>> 
>> Hi Enrico,
>> 
>> Where did you get this algorithm?  Did you consider using llvm::APFloat to do this for you?
>> 
>> -Chris
> 
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