https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106574
--- Comment #10 from Michael Hudson-Doyle <michael.hudson at canonical dot com>
---
FWIW, I see a similar error on ppc64el with what looks like a similar cause. (I
also see other errors that do not go away with s/O3/O2/ so that might be
something slightly different).
O3:
(kinetic-ppc64el)root@bobonevm3:/build/glibc-9T9BfE/glibc-2.36/build-tree/ppc64el-libc#
./elf/ld64.so.2 --library-path .:./elf:./math ./math/test-ibm128-y1
testing long double (without inline functions)
Failure: Test: y1_downward (0x2p+0)
Result:
is: -1.07032431540937546888370772277496e-01
-0x1.b667a3914664758b0c44371e580p-4
should be: -1.07032431540937546888370772277477e-01
-0x1.b667a3914664758b0c44371e520p-4
difference: 1.84889274661174641893373882488153e-32
0x1.800000000000000000000000000p-106
ulp : 12.0000
max.ulp : 11.0000
Maximal error of `y1_downward'
is : 12 ulp
accepted: 11 ulp
Failure: Test: y1_upward (0x1.c1bc2ep+0)
Result:
is: -2.49838507061808223791568937534715e-01
-0x1.ffab54c8e53c466a84209c10030p-3
should be: -2.49838507061808223791568937534759e-01
-0x1.ffab54c8e53c466a84209c100a0p-3
difference: 4.31408307542740831084539059139024e-32
0x1.c00000000000000000000000000p-105
ulp : 14.0000
max.ulp : 9.0000
Failure: Test: y1_upward (0x2p+0)
Result:
is: -1.07032431540937546888370772277458e-01
-0x1.b667a3914664758b0c44371e4c0p-4
should be: -1.07032431540937546888370772277475e-01
-0x1.b667a3914664758b0c44371e518p-4
difference: 1.69481835106076755068926058947474e-32
0x1.600000000000000000000000000p-106
ulp : 11.0000
max.ulp : 9.0000
Maximal error of `y1_upward'
is : 14 ulp
accepted: 9 ulp
Test suite completed:
175 test cases plus 171 tests for exception flags and
171 tests for errno executed.
O2:
(kinetic-ppc64el)root@bobonevm3:/build/glibc-9T9BfE/glibc-2.36/build-tree/ppc64el-libc#
./elf/ld64.so.2 --library-path .:./elf:./math ./math/test-ibm128-y1
testing long double (without inline functions)
Failure: Test: y1_upward (0x1.c1bc2ep+0)
Result:
is: -2.49838507061808223791568937534728e-01
-0x1.ffab54c8e53c466a84209c10050p-3
should be: -2.49838507061808223791568937534759e-01
-0x1.ffab54c8e53c466a84209c100a0p-3
difference: 3.08148791101957736488956470813589e-32
0x1.400000000000000000000000000p-105
ulp : 10.0000
max.ulp : 9.0000
Failure: Test: y1_upward (0x2p+0)
Result:
is: -1.07032431540937546888370772277458e-01
-0x1.b667a3914664758b0c44371e4c0p-4
should be: -1.07032431540937546888370772277475e-01
-0x1.b667a3914664758b0c44371e518p-4
difference: 1.69481835106076755068926058947474e-32
0x1.600000000000000000000000000p-106
ulp : 11.0000
max.ulp : 9.0000
Maximal error of `y1_upward'
is : 11 ulp
accepted: 9 ulp
Test suite completed:
175 test cases plus 171 tests for exception flags and
171 tests for errno executed.
3 errors occurred.
(I also see llround errors on ppc64el, no idea what's going on there...)
