% TPF does not define instructions for inverse trig; these intrinsics are
% decomposed into other instructions. FXC emits code which may vary wrt other
% implementations. DXIL defines intrinsics for inverse trig, to be implemented
% by the backend.

[pixel shader]
uniform float4 a;

float4 main() : sv_target
{
    return float4(acos(a.x), 0.0, 0.0, 0.0);
}

[test]
uniform 0 float4 -1.0 0.0 0.0 0.0
draw quad
probe (0, 0) f32(3.14159274, 0.0, 0.0, 0.0) 128

uniform 0 float4 -0.5 0.0 0.0 0.0
draw quad
probe (0, 0) f32(2.094441441, 0.0, 0.0, 0.0) 256

uniform 0 float4 0.0 0.0 0.0 0.0
draw quad
probe (0, 0) f32(1.57072878, 0.0, 0.0, 0.0) 1024

uniform 0 float4 0.5 0.0 0.0 0.0
draw quad
probe (0, 0) f32(1.04715133, 0.0, 0.0, 0.0) 512

uniform 0 float4 1.0 0.0 0.0 0.0
draw quad
probe (0, 0) f32(0.0, 0.0, 0.0, 0.0) 128

[pixel shader]
uniform float4 a;

float4 main() : sv_target
{
    float4 result = float4(asin(a.x), 0.0, 0.0, 0.0);
    // Quantize to cover implementation variations, which are quite large for asin().
    return round(result * 20000.0);
}

[test]
uniform 0 float4 -1.0 0.0 0.0 0.0
draw quad
probe (0, 0) f32(-31416.0, 0.0, 0.0, 0.0)

[require]
shader model < 6.0

[test]
uniform 0 float4 -0.5 0.0 0.0 0.0
draw quad
probe (0, 0) f32(-10473.0, 0.0, 0.0, 0.0)

uniform 0 float4 0.0 0.0 0.0 0.0
draw quad
probe (0, 0) f32(1.0, 0.0, 0.0, 0.0)

uniform 0 float4 0.5 0.0 0.0 0.0
draw quad
probe (0, 0) f32(10473.0, 0.0, 0.0, 0.0)

[require]
shader model >= 6.0

% We implement SM 6.0 inverse trig instructions using the native equivalents
% available in the backend. We have to quantize even more to account for
% different implementations.

[pixel shader]
uniform float4 a;

float4 main() : sv_target
{
    float4 result = float4(asin(a.x), 0.0, 0.0, 0.0);
    return round(result * 2000.0);
}

[test]
uniform 0 float4 -0.5 0.0 0.0 0.0
draw quad
probe (0, 0) f32(-1047.0, 0.0, 0.0, 0.0)

uniform 0 float4 0.0 0.0 0.0 0.0
draw quad
probe (0, 0) f32(0.0, 0.0, 0.0, 0.0)

uniform 0 float4 0.5 0.0 0.0 0.0
draw quad
probe (0, 0) f32(1047.0, 0.0, 0.0, 0.0)

[test]
uniform 0 float4 1.0 0.0 0.0 0.0
draw quad
probe (0, 0) f32(3142.0, 0.0, 0.0, 0.0)

[require]
% reset requirements

[pixel shader]
uniform float4 a;

float4 main() : sv_target
{
    return float4(atan(a.x), 0.0, 0.0, 0.0);
}

[test]
uniform 0 float4 -1.0 0.0 0.0 0.0
draw quad
probe (0, 0) f32(-0.785409629, 0.0, 0.0, 0.0) 512

uniform 0 float4 -0.5 0.0 0.0 0.0
draw quad
probe (0, 0) f32(-0.4636476, 0.0, 0.0, 0.0) 256

uniform 0 float4 0.0 0.0 0.0 0.0
draw quad
probe (0, 0) f32(0.0, 0.0, 0.0, 0.0) 256

uniform 0 float4 0.5 0.0 0.0 0.0
draw quad
probe (0, 0) f32(0.4636476, 0.0, 0.0, 0.0) 256

uniform 0 float4 1.0 0.0 0.0 0.0
draw quad
probe (0, 0) f32(0.785409629, 0.0, 0.0, 0.0) 512

[pixel shader]
uniform float4 a;

float4 main() : sv_target
{
    // The argument order is (y,x), and test case inputs are (y,x) also.
    return float4(atan2(a.x, a.y), 0.0, 0.0, 0.0);
}

[test]
% Non-degenerate cases
uniform 0 float4 1.0 1.0 0.0 0.0
draw quad
probe (0, 0) f32(0.785385, 0.0, 0.0, 0.0) 512

uniform 0 float4 5.0 -5.0 0.0 0.0
draw quad
probe (0, 0) f32(2.356194, 0.0, 0.0, 0.0) 256

uniform 0 float4 -3.0 -3.0 0.0 0.0
draw quad
probe (0, 0) f32(-2.356194, 0.0, 0.0, 0.0) 256

uniform 0 float4 1.0 0.0 0.0 0.0
draw quad
probe (0, 0) f32(1.570796, 0.0, 0.0, 0.0) 256

uniform 0 float4 -1.0 0.0 0.0 0.0
draw quad
probe (0, 0) f32(-1.570796, 0.0, 0.0, 0.0) 256

uniform 0 float4 0.0 1.0 0.0 0.0
draw quad
probe (0, 0) f32(0.0, 0.0, 0.0, 0.0) 256

uniform 0 float4 0.0 -1.0 0.0 0.0
draw quad
probe (0, 0) f32(3.1415927, 0.0, 0.0, 0.0) 256

% Degenerate cases
uniform 0 float4 0.00001 0.00002 0.0 0.0
draw quad
probe (0, 0) f32(0.463647, 0.0, 0.0, 0.0) 256

uniform 0 float4 0.00001 -0.00002 0.0 0.0
draw quad
probe (0, 0) f32(2.677945, 0.0, 0.0, 0.0) 256

uniform 0 float4 -0.00001 100000.0 0.0 0.0
draw quad
probe (0, 0) f32(-0.000000000099986595, 0.0, 0.0, 0.0) 2048

uniform 0 float4 10000000.0 0.00000001 0.0 0.0
draw quad
probe (0, 0) f32(1.570796, 0.0, 0.0, 0.0) 256

% Negative zero behavior should be to treat it the
% same as normal zero.
uniform 0 float4 1000000000.0 0.0 0.0 0.0
draw quad
probe (0, 0) f32(1.570796, 0.0, 0.0, 0.0) 256

uniform 0 float4 1000000000.0 -0.0 0.0 0.0
draw quad
probe (0, 0) f32(1.570796, 0.0, 0.0, 0.0) 256

uniform 0 float4 0.0 -1.0 0.0 0.0
draw quad
probe (0, 0) f32(3.1415927, 0.0, 0.0, 0.0) 256

uniform 0 float4 -0.0 -1.0 0.0 0.0
draw quad
probe (0, 0) f32(3.1415927, 0.0, 0.0, 0.0) 256