From: Ian Romanick <ian.d.roman...@intel.com> Signed-off-by: Ian Romanick <ian.d.roman...@intel.com> --- .../shared-atomicExchange-int.shader_test | 75 ++++++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 tests/spec/arb_compute_shader/execution/shared-atomicExchange-int.shader_test
diff --git a/tests/spec/arb_compute_shader/execution/shared-atomicExchange-int.shader_test b/tests/spec/arb_compute_shader/execution/shared-atomicExchange-int.shader_test new file mode 100644 index 000000000..2bd2bf1c1 --- /dev/null +++ b/tests/spec/arb_compute_shader/execution/shared-atomicExchange-int.shader_test @@ -0,0 +1,75 @@ +[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) { + /* Bootstrapping this with zero is unavoidable, bit it + * also causes problems later. Namely it means that + * bit 0 will get set twice and invocation 0 can see a + * zero value. Note the explicit checks for bit != 0 + * and gl_LocalInvocationIndex != 0 below. + */ + value = 0; + mask = 0u; + } + + barrier(); + + int f = atomicExchange(value, 2 * int(gl_LocalInvocationIndex)); + uint i = uint(f) / 2u; + 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 (bit != 0u && (r & m) != 0u) + atomicCounterIncrement(fail); + + /* Invocation index 0 can read it's own index (due to + * bootstrapping with zero), but no other invocation should. + */ + if (gl_LocalInvocationIndex != 0u && + bit == gl_LocalInvocationIndex) + atomicCounterIncrement(fail); + } else { + atomicCounterIncrement(fail); + } + + barrier(); + + if (gl_LocalInvocationIndex == 0u) { + uint i = uint(value / 2); + uint bit = i % 32u; + uint m = 1u << bit; + + uint final = m | mask; + + /* If all 32 bits are set, the test passes. */ + if (final == 0xffffffffu) + atomicCounterIncrement(pass); + } +} + +[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