In article ,
Grant Edwards wrote:
> I imagine that VAXes running Unix went extinct in the wild long before
> VAXes running VMS.
Of course they did. VMS is all about vendor lock-in. People who
continue to run VAXen don't do so because they're wedded to the
hardware. They do so because they'
On Mon, Jul 30, 2012 at 12:44 AM, Steven D'Aprano <
steve+comp.lang.pyt...@pearwood.info> wrote:
> I wish to extract the bit fields from a Python float, call it x. First I
> cast the float to 8-bytes:
>
> s = struct.pack('=d', x)
> i = struct.unpack('=q', s)[0]
>
> Then I extract the bit fields fr
On Monday, July 30, 2012 3:16:05 PM UTC+1, Grant Edwards wrote:
> The last ones I worked on that where the FP format wasn't IEEE were
>
> the DEC VAX and TI's line if 32-bit floating-point DSPs. I don't
>
> think Python runs on the latter, but it might on the former.
For current hardware, there
On 2012-07-30, Mark Lawrence wrote:
> On 30/07/2012 15:16, Grant Edwards wrote:
>> On 2012-07-30, Steven D'Aprano wrote:
>>
>>> 1) Are there any known implementations or platforms where Python floats
>>> are not C doubles? If so, what are they?
>>
>> And the question you didn't ask: are there any
On 30/07/2012 15:16, Grant Edwards wrote:
On 2012-07-30, Steven D'Aprano wrote:
1) Are there any known implementations or platforms where Python floats
are not C doubles? If so, what are they?
And the question you didn't ask: are there any platforms where a C
double isn't IEEE-754?
The last
In article ,
Grant Edwards wrote:
> The last ones I worked on that where the FP format wasn't IEEE were
> the DEC VAX
According to http://en.wikipedia.org/wiki/Vax#History, the last VAX was
produced 7 years ago. I'm sure there's still more than a few chugging
away in corporate data centers
On 2012-07-30, Steven D'Aprano wrote:
> 1) Are there any known implementations or platforms where Python floats
> are not C doubles? If so, what are they?
And the question you didn't ask: are there any platforms where a C
double isn't IEEE-754?
The last ones I worked on that where the FP forma
On Monday, July 30, 2012 1:44:04 AM UTC+1, Steven D'Aprano wrote:
> 1) Are there any known implementations or platforms where Python floats
> are not C doubles? If so, what are they?
Well, IronPython is presumably using .NET Doubles, while Jython will be using
Java Doubles---in either case, that
Am 30.07.2012 02:44, schrieb Steven D'Aprano:
I wish to extract the bit fields from a Python float, call it x. First I
cast the float to 8-bytes:
s = struct.pack('=d', x)
i = struct.unpack('=q', s)[0]
Then I extract the bit fields from the int, e.g. to grab the sign bit:
(i & 0x800
On 7/29/2012 8:44 PM, Steven D'Aprano wrote:
I wish to extract the bit fields from a Python float, call it x. First I
cast the float to 8-bytes:
s = struct.pack('=d', x)
i = struct.unpack('=q', s)[0]
Then I extract the bit fields from the int, e.g. to grab the sign bit:
(i & 0x8000
On 2012-07-30 at 00:44:04 +,
Steven D'Aprano wrote:
> I wish to extract the bit fields from a Python float, call it x. First I
> cast the float to 8-bytes:
>
> s = struct.pack('=d', x)
> i = struct.unpack('=q', s)[0]
>
> Then I extract the bit fields from the int, e.g. to grab the sign bit
I wish to extract the bit fields from a Python float, call it x. First I
cast the float to 8-bytes:
s = struct.pack('=d', x)
i = struct.unpack('=q', s)[0]
Then I extract the bit fields from the int, e.g. to grab the sign bit:
(i & 0x8000) >> 63
Questions:
1) Are there any known i
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