From: Ian Romanick <ian.d.roman...@intel.com>
Signed-off-by: Ian Romanick <ian.d.roman...@intel.com>
---
.../ssbo-atomicCompSwap-float-NaN.shader_test | 64 ++++++++++++++++++++++
1 file changed, 64 insertions(+)
create mode 100644
tests/spec/intel_shader_atomic_float_minmax/execution/ssbo-atomicCompSwap-float-NaN.shader_test
diff --git
a/tests/spec/intel_shader_atomic_float_minmax/execution/ssbo-atomicCompSwap-float-NaN.shader_test
b/tests/spec/intel_shader_atomic_float_minmax/execution/ssbo-atomicCompSwap-float-NaN.shader_test
new file mode 100644
index 000000000..d693d0514
--- /dev/null
+++
b/tests/spec/intel_shader_atomic_float_minmax/execution/ssbo-atomicCompSwap-float-NaN.shader_test
@@ -0,0 +1,64 @@
+[require]
+GL >= 3.3
+GLSL >= 3.30
+GL_ARB_shader_storage_buffer_object
+GL_INTEL_shader_atomic_float_minmax
+
+[vertex shader passthrough]
+
+[fragment shader]
+#extension GL_ARB_shader_storage_buffer_object: require
+#extension GL_INTEL_shader_atomic_float_minmax: require
+
+layout(binding = 0) buffer bufblock {
+ float value[8];
+};
+
+#define POS_NAN(x) (0x7f800000u | (0x007fffffu & uint(x)))
+#define NEG_NAN(x) (0xff800000u | (0x007fffffu & uint(x)))
+
+uniform uint comparitors[] = uint[](POS_NAN(0x00ffffff),
+ NEG_NAN(0x00ffffff),
+ POS_NAN(0x00555555),
+ NEG_NAN(0x00555555),
+ POS_NAN(0x00aaaaaa),
+ NEG_NAN(0x00aaaaaa),
+ floatBitsToUint(0.0),
+ floatBitsToUint(1.0));
+
+out vec4 color;
+
+void main()
+{
+ uint idx = uint(gl_FragCoord.x + gl_FragCoord.y) % uint(value.length());
+
+ /* This compare-and-swap should never succeed because NaN is never
+ * equal to anything. Either the value in the SSBO or the value being
+ * compared is NaN. If the compare-and-swap succeeds, the SSBO
+ * element will forever be set to float(idx).
+ */
+ floatBitsToUint(atomicCompSwap(value[idx],
+ uintBitsToFloat(comparitors[idx]),
+ 42.0));
+
+ color = value[idx] == 42.0
+ ? vec4(1.0, 0.0, 0.0, 1.0)
+ : vec4(0.0, 1.0, 0.0, 1.0);
+}
+
+[test]
+ssbo 0 32
+ssbo 0 subdata int 0 0x7fffffff
+ssbo 0 subdata int 4 0xffffffff
+ssbo 0 subdata int 8 0x7fd55555
+ssbo 0 subdata int 12 0xffd55555
+ssbo 0 subdata float 16 0.0
+ssbo 0 subdata float 20 1.0
+ssbo 0 subdata int 24 0x7faaaaaa
+ssbo 0 subdata int 28 0xffaaaaaa
+
+clear color 0.5 0.5 0.5 0.5
+clear
+
+draw rect -1 -1 2 2
+probe all rgba 0.0 1.0 0.0 1.0
--
2.14.4
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