From: Ian Romanick <ian.d.roman...@intel.com> Signed-off-by: Ian Romanick <ian.d.roman...@intel.com> --- .../shared-atomicCompSwap-int.shader_test | 64 ++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 tests/spec/arb_compute_shader/execution/shared-atomicCompSwap-int.shader_test
diff --git a/tests/spec/arb_compute_shader/execution/shared-atomicCompSwap-int.shader_test b/tests/spec/arb_compute_shader/execution/shared-atomicCompSwap-int.shader_test new file mode 100644 index 000000000..b5b691cf4 --- /dev/null +++ b/tests/spec/arb_compute_shader/execution/shared-atomicCompSwap-int.shader_test @@ -0,0 +1,64 @@ +[require] +GL >= 3.3 +GLSL >= 3.30 +GL_ARB_compute_shader +GL_ARB_shader_atomic_counters + +[compute shader] +#version 330 +#extension GL_ARB_compute_shader: require +#extension GL_ARB_shader_atomic_counters: require + +layout(local_size_x = 32) in; + +shared int value; +shared uint mask; + +layout(binding = 0) uniform atomic_uint pass; +layout(binding = 0) uniform atomic_uint fail; + +void main() +{ + if (gl_LocalInvocationIndex == 0u) { + value = 0; + mask = 0u; + } + + barrier(); + + /* Each local invocation should see a unique value. Each value + * observed is tracked in "mask." The test automatically fails if a + * duplicate value is observed. The test passes once all 32 possible + * values have been observed. + */ + int f = value; + int a; + + /* This is an open-coded atomicAdd. */ + do { + a = f; + } while ((f = atomicCompSwap(value, f, f + 4)) != a); + + uint i = uint(f) / 4u; + uint bit = i % 32u; + uint m = 1u << bit; + + if (i < 32u) { + /* If the bit was already set, the test fails. */ + uint r = atomicOr(mask, m); + if ((r & m) != 0u) + atomicCounterIncrement(fail); + + /* Once all 32 bits are set, the test passes. */ + if ((r | m) == 0xffffffffu) + atomicCounterIncrement(pass); + } else { + atomicCounterIncrement(fail); + } +} + +[test] +atomic counters 2 +compute 2 3 4 +probe atomic counter 0 == 24 +probe atomic counter 1 == 0 -- 2.14.4 _______________________________________________ Piglit mailing list Piglit@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/piglit