[Bug math/16424] New: Various test failures in math-ldouble on ppc32.

["brooks at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=16424

            Bug ID: 16424
           Summary: Various test failures in math-ldouble on ppc32.
           Product: glibc
           Version: 2.19
            Status: NEW
          Severity: normal
          Priority: P2
         Component: math
          Assignee: unassigned at sourceware dot org
          Reporter: brooks at gcc dot gnu.org

Created attachment 7343
  --> https://sourceware.org/bugzilla/attachment.cgi?id=7343&action=edit
test-ldouble.out

This is failing with GLIBC trunk as of 10am PST on 2014-01-09.

Configure with "../glibc/configure --prefix=/usr CC='gcc -m32' CXX='g++ -m32'
--target=powerpc32-unknown-linux-gnu --build=powerpc32-unknown-linux-gnu
--host=powerpc32-unknown-linux-gnu" on an IBM Power7; run "make" and "make
check".

Aside from bug 16422 (llrint failures) and bug 16423 (logb_downward failure)
that are common with float and double, I'm seeing quite a number of
very-large-ulps failures in the long-double tests on powerpc32.  I'll attach
the full math-ldouble.out file, but here are some notable ones:

----

Failure: cbrt (-0x4p-1024): Exception "Underflow" set
Failure: Test: cbrt (-0x4p-1024)
Result:
 is:         -2.81264428523626182350e-103  -0x1.428a2f98d728ab896ccbp-341
 should be:  -2.81264428523626190396e-103  -0x1.428a2f98d728ae223ddbp-341
 difference:  8.04551122898042983566e-120   0x1.4c688811936040000000p-396
 ulp       :  1461947279494529.0000
 max.ulp   :  0.0000

...

Failure: cbrt (-0x8p-972): Exception "Underflow" set
Failure: cbrt (-0xf.ffffffffffff8p+1020): Exception "Invalid operation" set
Failure: cbrt (-0xf.ffffffffffff8p+1020): Exception "Overflow" set
Failure: Test: cbrt (-0xf.ffffffffffff8p+1020)
Result:
 is:         qNaN
 should be:  -5.64380309412236197351e+102  -0x1.428a2f98d728aac622b1p+341

...

Failure: sqrt_towardzero (0x8.a1p+8): Exception "Inexact" set

...

Failure: tgamma (0x1p-1024): Exception "Underflow" set

...

Failure: drem (-0x1.80000000000002p1, 2.0): Exception "Inexact" set
Failure: remainder (-0x1.80000000000002p1, 2.0): Exception "Inexact" set
Failure: nextafter (1.1, qNaN): Exception "Inexact" set
Failure: nexttoward (1.1, qNaN): Exception "Inexact" set

...

Failure: Real part of: cacos (1.0 - 0x1.fp-1025 i): Exception "Underflow" set
Failure: Real part of: cacos (-1.0 - 0x1.fp-1025 i): Exception "Underflow" set
Failure: Test: Real part of: cacos (0x1.0000000000001p0 + 0x1.fp-1025 i)
Result:
 is:          2.55717850395349441328e-301   0x1.5eb99734b41ee0000000p-999
 should be:   2.55717850395349434261e-301   0x1.5eb99734b41edd458700p-999
 difference:  7.06747072537819626541e-318   0x0.000000015d3c80000000p-1022
 ulp       :  1430472.0000
 max.ulp   :  0.0000

...

Failure: Real part of: cacosh (1.0 - 0x1.fp-1025 i): Exception "Underflow" set
Failure: Real part of: cacosh (-1.0 - 0x1.fp-1025 i): Exception "Underflow" set
Failure: Test: Imaginary part of: cacosh (0x1.0000000000001p0 + 0x1.fp-1025 i)
Result:
 is:          2.55717850395349441328e-301   0x1.5eb99734b41ee0000000p-999
 should be:   2.55717850395349434261e-301   0x1.5eb99734b41edd458700p-999
 difference:  7.06747072537819626541e-318   0x0.000000015d3c80000000p-1022
 ulp       :  1430472.0000
 max.ulp   :  0.0000

...

[similar things for casin, casinh, catan, catanh omitted]

...

Failure: Real part of: csqrt (-0x8p-152 - 0x4.0000000000004p-1024 i): Exception
"Underflow" set
Failure: Test: Real part of: csqrt (-0x8p-152 - 0x4.0000000000004p-1024 i)
Result:
 is:          2.97200210516769104218e-286   0x1.6a09e667f3bce0000000p-949
 should be:   2.97200210516769103231e-286   0x1.6a09e667f3bcdfa95162p-949
 difference:  9.87515318423588497104e-304   0x1.5aba79b5752400000000p-1007
 ulp       :  190615964531346.0000
 max.ulp   :  0.0000

...

est suite completed:
  21433 test cases plus 20373 tests for exception flags and
    20373 tests for errno executed.
  222 errors occurred.

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