[Bug 89508] Bad int(floatBitsToInt(vec4))

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89508

--- Comment #3 from Iago Toral <itoral at igalia.com> ---
(In reply to Marc-Andre Lureau from comment #0)
> Created attachment 114179 [details]
> Piglit shader test
> 
> The attached piglit shader test fails with the i965 driver, and works with
> softpipe. The line:
> 
> addr0 = int(floatBitsToInt(temps[10].xxxx));
> 
> always retuns 0.

mmm... this is not what I see, if addr0 is always 0, then result should be a
red color (0.8, 0, 0, 0) and I see black (0.0, 0.0, 0.0, 0.0).

Just in case it helps, the expected execution of this to produce the expected
result should look like this:

Init:

temp[0] = 0.2,0,0,0 * 1,1,1,1 = 0.2,0,0,0
temp[9] = 0,0,0,0
temp[10] = 0,0,0,0

It0:

addr = 0
temp[addr] = 0.2,0,0,0
temps[9] = 0.2,0,0,0
temps[10].x = i2f(0,0,0,0 + 1,1,1,1).x = i2f(1,1,1,1).x = 1.45e-45
temps[10] = 1.4e-45,0.0.0

It1:

temp[11].x = 0
addr = 1
temp[addr] = 0,0.2,0.0 * 1,1,1,1 = 0,0.2,0,0
temps[9] = 0.2,0.2,0,0
temps[10].x = i2f(1,1,1,1 + 1,1,1,1).x = i2f(2,2,2,2).x = 2.8e-45
temps[10] = 2.8e-45,0.0.0

It2:
temp[11].x = 0
addr = 2
temp[addr] = 0,0,0.2.0 * 1,1,1,1 = 0,0,0.2,0
temps[9] = 0.2,0.2,0.2,0
temps[10].x = i2f(2,2,2,2 + 1,1,1,1).x = i2f(3,3,3,3).x = 4.2e-45
temps[10] = 4.2e-45,0.0.0

It3:
temp[11].x = 0
addr = 3
temp[addr] = 0.2,0.2,0,0 * 1,1,1,1 = 0.2,0.2,0,0
temps[9] = 0.4,0.4,0.2,0
temps[10].x = i2f(3,3,3,3 + 1,1,1,1).x = i2f(4,4,4,4).x = 5.6e-45
temps[10] = 5.6e-45,0.0.0

It4:
temp[11] = 1 => break;
Expected color = temp[9] = 0.4,0.4,0.2,0.0

I'll try to simplify the shader code, seems like it should be possible. If I am
successful I'll attach a new version.

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