#530: Failure of atan2 in jit core - ref TT #38
--------------------+-------------------------------------------------------
Reporter: mikehh | Type: bug
Status: new | Priority: normal
Milestone: | Component: none
Version: trunk | Severity: medium
Keywords: | Lang:
Patch: | Platform: linux
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Comment(by mikehh):
I thought I would have a look at this again - r37921
The test in question t/op/trans.t generates various .pasm files - the
failing one bring t/op/trans_13.pasm:
{{{
.include 'include/fp_equality.pasm'
set N0, 0.0
set I0, 0
set N1, 1.0
set I1, 1
set N2, 1.0
set I2, 1
set I3, -1
set N3, -1.0
atan N4, N1, N2
.fp_eq_pasm (N4, 0.785398, EQ1)
print "not "
EQ1: print "ok 1\n"
atan N4, N1, I2
.fp_eq_pasm (N4, 0.785398, EQ2)
print "not "
EQ2: print "ok 2\n"
atan N4, I1, N2
.fp_eq_pasm (N4, 0.785398, EQ3)
print "not "
EQ3: print "ok 3\n"
atan N4, I1, I2
.fp_eq_pasm (N4, 0.785398, EQ4)
print "not "
EQ4: print "ok 4\n"
atan N4, N3, 1.0
.fp_eq_pasm (N4, -0.785398, EQ5)
print "not "
EQ5: print "ok 5\n"
atan N4, N1, 0
.fp_eq_pasm (N4, 1.570796, EQ6)
print "not "
EQ6: print "ok 6\n"
atan N4, I3, 0.0
.fp_eq_pasm (N4, -1.570796, EQ7)
print "not "
EQ7: print "ok 7\n"
atan N4, I3, -1
.fp_eq_pasm (N4, -2.356194, EQ8)
print "not "
EQ8: print "ok 8\n"
atan N4, 1.0, N3
.fp_eq_pasm (N4, 2.356194, EQ9)
print "not "
EQ9: print "ok 9\n"
atan N4, 1.0, I0
.fp_eq_pasm (N4, 1.570796, EQ10)
print "not "
EQ10: print "ok 10\n"
atan N4, 1, N1
.fp_eq_pasm (N4, 0.785398, EQ11)
print "not "
EQ11: print "ok 11\n"
atan N4, 1, I1
.fp_eq_pasm (N4, 0.785398, EQ12)
print "not "
EQ12: print "ok 12\n"
atan N4, 0.0, 1.0
.fp_eq_pasm (N4, 0.000000, EQ13)
print "not "
EQ13: print "ok 13\n"
atan N4, -1.0, 0
.fp_eq_pasm (N4, -1.570796, EQ14)
print "not "
EQ14: print "ok 14\n"
atan N4, 1, -1.0
.fp_eq_pasm (N4, 2.356194, EQ15)
print "not "
EQ15: print "ok 15\n"
atan N4, 0, 1
.fp_eq_pasm (N4, 0.000000, EQ16)
print "not "
EQ16: print "ok 16\n"
end
}}}
running with the jit core gives the failing result:[[BR]]
./parrot -Rjit t/op/trans_13.pasm ->
{{{
not ok 1
not ok 2
not ok 3
not ok 4
not ok 5
not ok 6
not ok 7
not ok 8
not ok 9
not ok 10
not ok 11
not ok 12
ok 13
ok 14
ok 15
ok 16
}}}
runnung without the jit core produces OK results.
I then edited the .pasm file removing the test stuff and inserting print
statements - trans_test_13.pasm ->
{{{
set N0, 0.0
set I0, 0
set N1, 1.0
set I1, 1
set N2, 1.0
set I2, 1
set I3, -1
set N3, -1.0
atan N4, N1, N2
print N4
print "\n"
atan N4, N1, I2
print N4
print "\n"
atan N4, I1, N2
print N4
print "\n"
atan N4, I1, I2
print N4
print "\n"
atan N4, N3, 1.0
print N4
print "\n"
atan N4, N1, 0
print N4
print "\n"
atan N4, I3, 0.0
print N4
print "\n"
atan N4, I3, -1
print N4
print "\n"
atan N4, 1.0, N3
print N4
print "\n"
atan N4, 1.0, I0
print N4
print "\n"
atan N4, 1, N1
print N4
print "\n"
atan N4, 1, I1
print N4
print "\n"
atan N4, 0.0, 1.0
print N4
print "\n"
atan N4, -1.0, 0
print N4
print "\n"
atan N4, 1, -1.0
print N4
print "\n"
atan N4, 0, 1
print N4
print "\n"
end
}}}
This generated the following - ./parrot -Rjit trans_test_13.pasm ->
{{{
NaN
0.785398163397448
0.785398163397448
0.785398163397448
-0.785398163397448
1.5707963267949
-1.5707963267949
-2.35619449019234
2.35619449019234
1.5707963267949
0.785398163397448
0.785398163397448
0
-1.5707963267949
2.35619449019234
0
}}}
Running this without the jit core replaces the first line Nan with
0.785398163397448
I then inserted the following lines afrer the first call and print (line
19) ->
{{{
print "do it again\n"
atan N4, N1, N2
print N4
print "\n"
./parrot -Rjit trans_test_13.pasm
NaN
do it again
0.785398163397448
0.785398163397448
0.785398163397448
0.785398163397448
-0.785398163397448
1.5707963267949
-1.5707963267949
-2.35619449019234
2.35619449019234
1.5707963267949
0.785398163397448
0.785398163397448
0
-1.5707963267949
2.35619449019234
0
}}}
It appears that the jit core produces a Nan the first time it is run and
afterwards produces the correct results. This is NOT reflected in the
test.
Cheers, Michael (mikehh)
--
Ticket URL: <https://trac.parrot.org/parrot/ticket/530#comment:2>
Parrot <https://trac.parrot.org/parrot/>
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