vkd3d/tests/hlsl/sm1-const-folding.shader_test

% Test the interaction between integer constant folding and the fact
% that integers are secretly considered floats in SM1-3

[pixel shader]
float4 main() : SV_TARGET
{
    uint x = 3000000000u;
    return float4(x, 0.0, 0.0, 0.0);
}

[test]
draw quad
probe (0, 0) rgba (3.0e+009, 0.0, 0.0, 0.0)

% The uint value is never casted to int on SM1-3, just casted to float and treated as such
[pixel shader]
float4 main() : SV_TARGET
{
    int x = 3000000000u;
    return float4(x, 0.0, 0.0, 0.0);
}

[test]
draw quad
if(sm<4) todo probe (0,0) rgba (3.0e+009, 0.0, 0.0, 0.0)
if(sm>=4) probe (0,0) rgba (-1.29496730e+009, 0.0, 0.0, 0.0)

% On SM1-5 (FXC) the literal is considered signed independently of its value and casted to uint;
% on SM1-3 compilation fails because the uint would be negative
[pixel shader fail(sm<4) todo(sm<4)]
float4 main() : SV_TARGET
{
    uint x = 3000000000;
    return float4(x, 0.0, 0.0, 0.0);
}

[test]
draw quad
if(sm>=4) probe (0,0) rgba (3.0e+009, 0.0, 0.0, 0.0)

[pixel shader]
float4 main() : SV_TARGET
{
    int x = 3000000000;
    return float4(x, 0.0, 0.0, 0.0);
}

[test]
draw quad
probe (0, 0) rgba (-1.29496730e+009, 0.0, 0.0, 0.0)

[pixel shader]
float4 main() : SV_TARGET
{
    return float4(3000000000u, 0.0, 0.0, 0.0);
}

[test]
draw quad
probe (0, 0) rgba (3.0e+009, 0.0, 0.0, 0.0)

% Unsuffixed literals can instead be considered unsigned on SM6
[pixel shader]
float4 main() : SV_TARGET
{
    return float4(3000000000, 0.0, 0.0, 0.0);
}

[test]
draw quad
if(sm<6) probe (0,0) rgba (-1.29496730e+009, 0.0, 0.0, 0.0)
if(sm>=6) probe (0,0) rgba (3.0e+009, 0.0, 0.0, 0.0)

% Constant folding is done with uint semantics before converting to float;
% so constant folding seems to happen before converting integer operations to floats
[pixel shader]
float4 main() : SV_TARGET
{
    uint x = 3000000000u + 3000000000u;
    return float4(x, 0.0, 0.0, 0.0);
}

[test]
draw quad
probe (0, 0) rgba (1.70503270e+009, 0.0, 0.0, 0.0)

% SM1-3 complains that uint values must be positive, but it's not clear why this is a problem here:
% the sum should be done before casting to uint, and the result of the int sum should be positive,
% so it seems that the declared type of x means something on how constant folding is done.
% I'm not sure what's happening for SM4 anyway
[pixel shader fail(sm<4) todo(sm<4)]
float4 main() : SV_TARGET
{
    uint x = 3000000000 + 3000000000;
    return float4(x, 0.0, 0.0, 0.0);
}

[test]
draw quad
todo probe (0,0) rgba (2.14748365e+009, 0.0, 0.0, 0.0)

% Again, no idea of what's happening here
[pixel shader]
float4 main() : SV_TARGET
{
    int x = 3000000000 + 3000000000;
    return float4(x, 0.0, 0.0, 0.0);
}

[test]
draw quad
todo probe (0,0) rgba (-2.14748365e+009, 0.0, 0.0, 0.0)

% This makes sense
[pixel shader]
float4 main() : SV_TARGET
{
    return float4(3000000000u + 3000000000u, 0.0, 0.0, 0.0);
}

[test]
draw quad
probe (0, 0) rgba (1.70503270e+009, 0.0, 0.0, 0.0)

% This does not again
[pixel shader]
float4 main() : SV_TARGET
{
    return float4(3000000000 + 3000000000, 0.0, 0.0, 0.0);
}

[test]
draw quad
todo probe (0,0) rgba (-2.14748365e+009, 0.0, 0.0, 0.0)

% Explicit float literals use float semantics, at least
[pixel shader]
float4 main() : SV_TARGET
{
    float x = 3000000000.0 + 3000000000.0;
    return float4(x, 0.0, 0.0, 0.0);
}

[test]
draw quad
probe (0, 0) rgba (6.0e+009, 0.0, 0.0, 0.0)