703512 - Float4 arithmetic failures on ARM, possible register allocation issue

Status: RESOLVED WONTFIX

(Tamarin Graveyard :: Baseline JIT (CodegenLIR), defect, P3)

Description

[William Maddox]

The following test case fails.  It is a reduced version of a failure in
test/acceptance/as3/Types/Float4/float4Operations.as, which has many
similar failure.  See also bug 700642, comment 2 and 4.  Note that the
incorrect value appears elsewhere in the computation, indicating that
a clobbered or misallocated register is likely the culprit.

// tr-float/deb32/shell/avmshell -Ojit tr-float/test/acceptance/as3/Types/Float4/fops.abc

class Flt4AnyOps {
    var _val;
    public function Flt4AnyOps(v){ _val = v; };
    public function add(value:float4):float4 { return _val+value; };
}

// This fails
function test1(){
    var obj:Flt4AnyOps = new Flt4AnyOps(float4(3.14f, -3.14f, 3.14f, -3.14f));
    trace(obj.add(float4(31.4f, -31.4f, -0f, 6.28f)));
}

// This works
function test2(){
    var val = float4(3.14f, -3.14f, 3.14f, -3.14f);
    trace(val + float4(31.4f, -31.4f, -0f, 6.28f));
}

// This works
function test3(){
    var val:float4 = float4(3.14f, -3.14f, 3.14f, -3.14f);
    trace(val + float4(31.4f, -31.4f, -0f, 6.28f));
}

// Print four lines, all of which should
// be identical to the first.

trace(float4(34.54f, -34.54f, 3.14f, 3.14f));
test1();
test2();
test3();

wmaddox@tamarin-panda:~/panda$ tr-float/deb32/shell/avmshell -Ojit tr-float/test/acceptance/as3/Types/Float4/fops.abc
34.540000915527344,-34.540000915527344,3.140000104904175,3.140000104904175
34.540000915527344,-34.540000915527344,3.140000104904175,34.540000915527344
34.540000915527344,-34.540000915527344,3.140000104904175,3.140000104904175
34.540000915527344,-34.540000915527344,3.140000104904175,3.140000104904175

Comment 1

[Tamarin Bot]

changeset: 7146:2550c3baa3d7
user:      Brent Baker <[e-mail]>
summary:   Bug 692402, Bug 703512: update the failconfig file for proper bug references

http://hg.mozilla.org/tamarin-redux/rev/2550c3baa3d7

Comment 2

[Sylvestre Ledru [:Sylvestre]]

Tamarin is a dead project now. Mass WONTFIX.

Comment 3

[Sylvestre Ledru [:Sylvestre]]

Tamarin isn't maintained anymore. WONTFIX remaining bugs.