[require]
GLSL >= 1.10

[vertex shader]
void main()
{
	gl_Position = gl_Vertex;
}

[fragment shader]
uniform vec4 arg0;
uniform vec4 arg1;
void main()
{
	gl_FragColor.x = float(arg0 != arg1); /* false */
	gl_FragColor.y = float(arg0.xxxx != arg1); /* true */
	gl_FragColor.z = float(arg0.wzyx != arg1.wzyx); /* false */
	gl_FragColor.w = float(arg0.wwww != arg1); /* true */
}

[test]
uniform vec4 arg0 0.0 1.0 2.0 3.0
uniform vec4 arg1 0.0 1.0 2.0 3.0
draw rect -1 -1 2 2
probe all rgba 0.0 1.0 0.0 1.0