| [require] |
| VK_KHR_spirv_1_4 |
| VK_KHR_variable_pointers |
| VariablePointerFeatures.variablePointersStorageBuffer |
| VK_KHR_storage_buffer_storage_class |
| VK_KHR_get_physical_device_properties2 |
| |
| [compute shader spirv] |
| ; Tests use of private variables holding SSBO pointers and pointer comparisons. |
| |
| ; Two iterators are each stored in Private variables: one moves forward, one |
| ; moves backward. In each iteration an OpPtrNotEqual comparison is written. |
| ; Iterators are then moved forward (or backward respectively) one index. |
| |
| OpCapability Shader |
| OpCapability VariablePointersStorageBuffer |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint GLCompute %main "main" %in_var %out_var %forward_var %backward_var |
| OpExecutionMode %main LocalSize 1 1 1 |
| |
| OpDecorate %int_rta ArrayStride 4 |
| OpDecorate %in_struct Block |
| OpMemberDecorate %in_struct 0 Offset 0 |
| OpMemberDecorate %in_struct 1 Offset 4 |
| OpDecorate %in_var DescriptorSet 0 |
| OpDecorate %in_var Binding 0 |
| |
| OpDecorate %out_struct Block |
| OpMemberDecorate %out_struct 0 Offset 0 |
| OpDecorate %out_var DescriptorSet 0 |
| OpDecorate %out_var Binding 1 |
| |
| OpDecorate %ptr_ssbo_int ArrayStride 4 |
| |
| %void = OpTypeVoid |
| %bool = OpTypeBool |
| %int = OpTypeInt 32 1 |
| %int_n1 = OpConstant %int -1 |
| %int_0 = OpConstant %int 0 |
| %int_1 = OpConstant %int 1 |
| %int_2 = OpConstant %int 2 |
| %int_3 = OpConstant %int 3 |
| |
| %int_rta = OpTypeRuntimeArray %int |
| %in_struct = OpTypeStruct %int %int_rta |
| %ptr_ssbo_in_struct = OpTypePointer StorageBuffer %in_struct |
| %in_var = OpVariable %ptr_ssbo_in_struct StorageBuffer |
| |
| %out_struct = OpTypeStruct %int_rta |
| %ptr_ssbo_out_struct = OpTypePointer StorageBuffer %out_struct |
| %out_var = OpVariable %ptr_ssbo_out_struct StorageBuffer |
| |
| %ptr_ssbo_int = OpTypePointer StorageBuffer %int |
| %ptr_ptr = OpTypePointer Private %ptr_ssbo_int |
| %forward_var = OpVariable %ptr_ptr Private |
| %backward_var = OpVariable %ptr_ptr Private |
| |
| %ptr_ssbo_n = OpTypePointer StorageBuffer %int |
| %void_fn = OpTypeFunction %void |
| %main = OpFunction %void None %void_fn |
| %entry = OpLabel |
| %n_gep = OpAccessChain %ptr_ssbo_n %in_var %int_0 |
| %n = OpLoad %int %n_gep |
| %first_gep = OpAccessChain %ptr_ssbo_int %in_var %int_1 %int_0 |
| OpStore %forward_var %first_gep |
| %last_gep = OpPtrAccessChain %ptr_ssbo_int %first_gep %n |
| OpStore %backward_var %last_gep |
| %cmp_n = OpSLessThanEqual %bool %n %int_0 |
| OpSelectionMerge %exit None |
| OpBranchConditional %cmp_n %exit %loop |
| |
| %loop = OpLabel |
| %i = OpPhi %int %int_0 %entry %inc_i %loop |
| %forward_gep = OpLoad %ptr_ssbo_int %forward_var |
| %backward_gep = OpLoad %ptr_ssbo_int %backward_var |
| %forward_next = OpPtrAccessChain %ptr_ssbo_int %forward_gep %int_1 |
| %backward_next = OpPtrAccessChain %ptr_ssbo_int %backward_gep %int_n1 |
| %inc_i = OpIAdd %int %i %int_1 |
| OpStore %forward_var %forward_next |
| OpStore %backward_var %backward_next |
| |
| %not_equal = OpPtrNotEqual %bool %forward_gep %backward_gep |
| %not_equal_int = OpSelect %int %not_equal %int_1 %int_0 |
| %out_gep = OpAccessChain %ptr_ssbo_int %out_var %int_0 %i |
| OpStore %out_gep %not_equal_int |
| |
| %cmp = OpSGreaterThanEqual %bool %i %n |
| OpLoopMerge %loop_exit %loop None |
| OpBranchConditional %cmp %loop_exit %loop |
| |
| %loop_exit = OpLabel |
| OpBranch %exit |
| %exit = OpLabel |
| OpReturn |
| OpFunctionEnd |
| |
| [test] |
| ssbo 0:0 132 |
| # Only data for number of iterations matters. |
| ssbo 0:0 subdata int 0 32 |
| ssbo 0:1 128 |
| |
| compute entrypoint main |
| compute 1 1 1 |
| |
| probe ssbo int 0:1 0 == 1 |
| probe ssbo int 0:1 4 == 1 |
| probe ssbo int 0:1 8 == 1 |
| probe ssbo int 0:1 12 == 1 |
| probe ssbo int 0:1 16 == 1 |
| probe ssbo int 0:1 20 == 1 |
| probe ssbo int 0:1 24 == 1 |
| probe ssbo int 0:1 28 == 1 |
| probe ssbo int 0:1 32 == 1 |
| probe ssbo int 0:1 36 == 1 |
| probe ssbo int 0:1 40 == 1 |
| probe ssbo int 0:1 44 == 1 |
| probe ssbo int 0:1 48 == 1 |
| probe ssbo int 0:1 52 == 1 |
| probe ssbo int 0:1 56 == 1 |
| probe ssbo int 0:1 60 == 1 |
| probe ssbo int 0:1 64 == 0 |
| probe ssbo int 0:1 68 == 1 |
| probe ssbo int 0:1 72 == 1 |
| probe ssbo int 0:1 76 == 1 |
| probe ssbo int 0:1 80 == 1 |
| probe ssbo int 0:1 84 == 1 |
| probe ssbo int 0:1 88 == 1 |
| probe ssbo int 0:1 92 == 1 |
| probe ssbo int 0:1 96 == 1 |
| probe ssbo int 0:1 100 == 1 |
| probe ssbo int 0:1 104 == 1 |
| probe ssbo int 0:1 108 == 1 |
| probe ssbo int 0:1 112 == 1 |
| probe ssbo int 0:1 116 == 1 |
| probe ssbo int 0:1 120 == 1 |
| probe ssbo int 0:1 124 == 1 |
| |
| |
