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97668c8c37
Add `transform::DecomposeStridedMatrix`, which replaces matrix members of storage or uniform buffer structures, that have a [[stride]] decoration, into an array of N column vectors. This is required to correctly handle `mat2x2` matrices in UBOs, as std140 rules will expect a default stride of 16 bytes, when in WGSL the default structure layout expects a stride of 8 bytes. Bug: tint:1047 Change-Id: If5ca3c6ec087bbc1ac31a8d9a657b99bf34042a4 Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/59840 Reviewed-by: David Neto <dneto@google.com> Commit-Queue: Ben Clayton <bclayton@google.com> Kokoro: Kokoro <noreply+kokoro@google.com>
34 lines
2.0 KiB
Plaintext
34 lines
2.0 KiB
Plaintext
OpCapability Shader
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OpMemoryModel Logical GLSL450
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OpEntryPoint GLCompute %f "f"
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OpExecutionMode %f LocalSize 1 1 1
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OpName %SSBO "SSBO"
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OpMemberName %SSBO 0 "m"
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OpName %ssbo "ssbo"
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OpName %f "f"
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OpDecorate %SSBO Block
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OpMemberDecorate %SSBO 0 Offset 0
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OpMemberDecorate %SSBO 0 ColMajor
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OpMemberDecorate %SSBO 0 MatrixStride 16
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OpDecorate %ssbo DescriptorSet 0
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OpDecorate %ssbo Binding 0
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%float = OpTypeFloat 32
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%v2float = OpTypeVector %float 2
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%mat2v2float = OpTypeMatrix %v2float 2
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%SSBO = OpTypeStruct %mat2v2float
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%_ptr_StorageBuffer_SSBO = OpTypePointer StorageBuffer %SSBO
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%ssbo = OpVariable %_ptr_StorageBuffer_SSBO StorageBuffer
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%void = OpTypeVoid
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%7 = OpTypeFunction %void
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%uint = OpTypeInt 32 0
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%uint_0 = OpConstant %uint 0
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%_ptr_StorageBuffer_mat2v2float = OpTypePointer StorageBuffer %mat2v2float
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%f = OpFunction %void None %7
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%10 = OpLabel
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%14 = OpAccessChain %_ptr_StorageBuffer_mat2v2float %ssbo %uint_0
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%15 = OpLoad %mat2v2float %14
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%16 = OpAccessChain %_ptr_StorageBuffer_mat2v2float %ssbo %uint_0
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OpStore %16 %15
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OpReturn
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OpFunctionEnd
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