reference/shaders-msl/comp/threadgroup-boolean-workaround.comp

#pragma clang diagnostic ignored "-Wmissing-prototypes"

#include <metal_stdlib>
#include <simd/simd.h>

using namespace metal;

struct SSBO
{
    float4 values[1];
};

constant uint3 gl_WorkGroupSize [[maybe_unused]] = uint3(4u, 1u, 1u);

static inline __attribute__((always_inline))
void in_function(threadgroup short4 (&foo)[4], thread uint& gl_LocalInvocationIndex, device SSBO& v_23, thread uint3& gl_GlobalInvocationID)
{
    foo[gl_LocalInvocationIndex] = short4(v_23.values[gl_GlobalInvocationID.x] != float4(10.0));
    threadgroup_barrier(mem_flags::mem_threadgroup);
    v_23.values[gl_GlobalInvocationID.x] = select(float4(40.0), float4(30.0), bool4(foo[gl_LocalInvocationIndex ^ 3u]));
}

kernel void main0(device SSBO& v_23 [[buffer(0)]], uint gl_LocalInvocationIndex [[thread_index_in_threadgroup]], uint3 gl_GlobalInvocationID [[thread_position_in_grid]])
{
    threadgroup short4 foo[4];
    in_function(foo, gl_LocalInvocationIndex, v_23, gl_GlobalInvocationID);
}