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K6-II+, 2.2.3pre3 test results



> I run K6-II+ 500 MHZ model 13 stepping 4 at 400 MHZ

Using a similar processor I get the similar but not identical
error report below.  The same compiler and binutils gave no error
report on an Intel P133.

According to my calculation,
  Jn(3,10) = 5.83793793051868123429E-2
which means the "should be" value printed in the test report is wrong
at the 8th figure.  When I use the jn function in a test program,
it gives the correct answer.  Also Drepper previously said the i387 asinl
function was very inaccurate but when I tested the routine it did
not seem to have much wrong with it.  So I suspect the functions may be
ok but I wonder about what is going on in the test program.

$ gcc -v
Reading specs from /usr/lib/gcc-lib/i486-linux/2.95.3/specs
gcc version 2.95.3 20010312 (prerelease)

$ as --version
GNU assembler 2.10.1

$ cat /proc/cpuinfo
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 5
model           : 8
model name      : AMD-K6(tm) 3D processor
stepping        : 12
cpu MHz         : 350.803
cache size      : 64 KB
fdiv_bug        : no
hlt_bug         : no
sep_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr mce cx8 sep mtrr pge mmx
3dnow
bogomips        : 699.60


$ cat test-ifloat.out
testing float (inline functions)
Failure: Test: jn (3, 10.0) == 0.058379379305186812343
Result:
 is:          5.80999180674552917480e-02   0x1.dbf45c00000000000000p-5
 should be:   5.83793781697750091553e-02   0x1.de3e6e00000000000000p-5
 difference:  2.79460102319717407227e-04   0x1.25090000000000000000p-12
 ulp       :  75017.0000
 max.ulp   :  1.0000
Maximal error of `jn'
 is      :  75017.0000 ulp
 accepted:  2.0000 ulp

Test suite completed:
  2406 test cases plus 2204 tests for exception flags executed.
  2 errors occurred.


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