From: Markus Schöpflin (markus.schoepflin_at_[hidden])
Date: 2006-12-06 04:31:43
Johan Råde wrote:
> Markus Schöpflin wrote:
>
>> You can't leave out -ieee as
>> the Alpha needs some special compiler help for conforming IEEE math
>> handling, the processor itself is only 'mostly conformant'.
>
> What happens if you leave out -ieee?
fpclassify/test> cxx -D__USE_STD_IOSTREAM -I /vol2/boost/boost test.cpp -lm
&& ./a.out
fp_traits<float>::type is specialized
fp_traits<double>::type is specialized
fp_traits<long double>::type is generic
sizeof(long double) = 16
Testing float
Assertion failed: std::numeric_limits<T>::has_denorm, file test.cpp, line 100
IOT/Abort trap (core dumped)
> Could you run the inspect tool with -ieee leaved out?
fpclassify/tools/inspect> cxx -D__USE_STD_IOSTREAM -I /vol2/boost/boost
inspect.cpp -lm && ./a.out
This platform is little-endian.
BOOST_LITTTLE_ENDIAN is defined.
---------- float --------------------
0 00 00 00 00
sn. min 00 00 00 00
-sn. min 80 00 00 00
n. min/2 00 00 00 00
-n. min/2 00 00 00 00
n. min 00 80 00 00
1 3f 80 00 00
3/2 3f c0 00 00
4/3 3f aa aa ab
max 7f 7f ff ff
inf -- -- -- --
q. nan -- -- -- --
s. nan -- -- -- --
---------- double -------------------
0 00 00 00 00 00 00 00 00
sn. min 00 00 00 00 00 00 00 00
-sn. min 80 00 00 00 00 00 00 00
n. min/2 00 00 00 00 00 00 00 00
-n. min/2 00 00 00 00 00 00 00 00
n. min 00 10 00 00 00 00 00 00
1 3f f0 00 00 00 00 00 00
3/2 3f f8 00 00 00 00 00 00
4/3 3f f5 55 55 55 55 55 55
max 7f ef ff ff ff ff ff ff
inf -- -- -- -- -- -- -- --
q. nan -- -- -- -- -- -- -- --
s. nan -- -- -- -- -- -- -- --
---------- long double --------------
0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
sn. min 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-sn. min 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
n. min/2 00 00 80 00 00 00 00 00 00 00 00 00 00 00 00 00
-n. min/2 80 00 80 00 00 00 00 00 00 00 00 00 00 00 00 00
n. min 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1 3f ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00
3/2 3f ff 80 00 00 00 00 00 00 00 00 00 00 00 00 00
4/3 3f ff 55 55 55 55 55 55 55 55 55 55 55 55 55 55
max 7f fe ff ff ff ff ff ff ff ff ff ff ff ff ff ff
inf -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
q. nan -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
s. nan -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --