SPIRV-Cross/reference/shaders-msl/asm/comp/atomic-decrement.asm.comp
2018-09-12 09:43:12 -05:00

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#pragma clang diagnostic ignored "-Wmissing-prototypes"
#pragma clang diagnostic ignored "-Wunused-variable"
#include <metal_stdlib>
#include <simd/simd.h>
#include <metal_atomic>
using namespace metal;
struct u0_counters
{
uint c;
};
// Returns 2D texture coords corresponding to 1D texel buffer coords
uint2 spvTexelBufferCoord(uint tc)
{
return uint2(tc % 4096, tc / 4096);
}
kernel void main0(device u0_counters& u0_counter [[buffer(0)]], texture2d<uint, access::write> u0 [[texture(0)]], uint3 gl_GlobalInvocationID [[thread_position_in_grid]])
{
uint _29 = atomic_fetch_sub_explicit((volatile device atomic_uint*)&u0_counter.c, 1, memory_order_relaxed);
float4 r0;
r0.x = as_type<float>(_29);
u0.write(uint4(uint(int(gl_GlobalInvocationID.x))), spvTexelBufferCoord(((uint(as_type<int>(r0.x)) * 1u) + (uint(0) >> 2u))));
}