[PATCH] Regenerate ULPs for i486 builds.

Carlos O'Donell carlos@redhat.com
Fri Oct 28 03:02:00 GMT 2016


Joseph,

On i486 builds I see 3 failures:

FAIL: math/test-ildouble
FAIL: math/test-ldouble
FAIL: math/test-ldouble-finite
Summary of test results:
      3 FAIL
   2553 PASS
     45 XFAIL

They are all ULPs related e.g.
~~~
Failure: Test: pow_towardzero (0x1.000002p+0, -0x2p+0)
Result:
 is:          9.99999761581463530839e-01   0xf.ffffc00000bfffd0p-4
 should be:   9.99999761581463530947e-01   0xf.ffffc00000bffff0p-4
 difference:  1.08420217248550443400e-19   0x8.0000000000000000p-66
 ulp       :  2.0000
 max.ulp   :  1.0000
~~~

Why might we be 1-3 ULP worse than the previously checked in baseline?
The baseline were accurate when you added them in 2012, but perhaps
compiler changes have caused this regerssion.

It's not entirely out of line with what we have for the other pow
baselines, so I'm going to suggest updating the baseline, to avoid the
failures.

Regenerated with `make regen-ulps`.

OK to checkin?

2016-10-27  Carlos O'Donell  <carlos@redhat.com>

	* sysdeps/i386/fpu/libm-test-ulps: Regenerate.

diff --git a/sysdeps/i386/fpu/libm-test-ulps b/sysdeps/i386/fpu/libm-test-ulps
index 84da475..1858c06 100644
--- a/sysdeps/i386/fpu/libm-test-ulps
+++ b/sysdeps/i386/fpu/libm-test-ulps
@@ -1901,14 +1901,14 @@ ldouble: 4
 Function: "pow_towardzero":
 double: 1
 idouble: 1
-ildouble: 1
-ldouble: 1
+ildouble: 4
+ldouble: 4
 
 Function: "pow_upward":
 double: 1
 idouble: 1
-ildouble: 2
-ldouble: 2
+ildouble: 4
+ldouble: 4
 
 Function: "sin":
 float: 1
---

-- 
Cheers,
Carlos.



More information about the Libc-alpha mailing list