[mlir][dxsa] Add dcl constant buffer instruction#133
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tagolog merged 1 commit intoMay 29, 2026
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asavonic
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May 21, 2026
| if (!accessPattern) | ||
| return emitError(loc, "unknown constant buffer access pattern: ") | ||
| << rawAccessPattern; | ||
| auto operand = parseInlineOperand(); |
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The operand for dcl_constantBuffer is fake - it can only be D3D10_SB_OPERAND_TYPE_CONSTANT_BUFFER, and we only need indices from it. The second index is also fake: it defines size of a buffer. Other properties of operands are meaningless - components, mask, swizzle. I don't think they are used for this instruction.
asavonic
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May 21, 2026
| LogicalResult | ||
| InlineOperandAttr::verify(function_ref<InFlightDiagnostic()> emitError, | ||
| ::mlir::dxsa::InlineOperandType /*type*/, | ||
| uint32_t components, |
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Do we verify that components can only be 0, 1, or 4?
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I plan to handle this in the separate PR that refines operands.
asavonic
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May 21, 2026
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Example: dxsa.dcl_constant_buffer <slot = 0, size = 1>, <immediateIndexed> dxsa.dcl_constant_buffer <id = 0, lbound = 0, ubound = 3, size = 4, space = 1>, <dynamicIndexed> Signed-off-by: Vladimir Shiryaev <tagolog@users.noreply.github.com>
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Example:
dxsa.dcl_constant_buffer <slot = 0, size = 1>,
dxsa.dcl_constant_buffer <id = 0, lbound = 0, ubound = 3, size = 4, space = 1>,