reference/shaders-msl/comp/dowhile.comp

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

using namespace metal;

struct SSBO
{
    float4x4 mvp;
    float4 in_data[1];
};

struct SSBO2
{
    float4 out_data[1];
};

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

kernel void main0(const device SSBO& _28 [[buffer(0)]], device SSBO2& _52 [[buffer(1)]], uint3 gl_GlobalInvocationID [[thread_position_in_grid]])
{
    uint ident = gl_GlobalInvocationID.x;
    int i = 0;
    float4 idat = _28.in_data[ident];
    do
    {
        idat = _28.mvp * idat;
        i++;
    } while (i < 16);
    _52.out_data[ident] = idat;
}