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[circle-schema] Add MX dtype restrictions comment #16344

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Merged
jinevening merged 1 commit into from
Jan 14, 2026
Merged

[circle-schema] Add MX dtype restrictions comment #16344

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7 changes: 7 additions & 0 deletions nnpackage/schema/circle_schema.fbs
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Original file line number Diff line number Diff line change
Expand Up @@ -87,6 +87,13 @@ enum TensorType : byte {
GGML_Q8_1 = -5,

// MX dtypes
// Current restrictions of MX dtypes
// - MX dtypes are not used for model I/O
// - MX dtypes are used for activations, not for constant inputs (ex. weight)
// - MX dtype's parameters (block size, exponent scale, etc) follows
// OCP Microscaling Formats Specification
// - Model does not have exponent scale data.
// Backend should define and use internally if needed
MXFP4 = -6,
MXINT8 = -7,
}
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7 changes: 7 additions & 0 deletions res/CircleSchema/0.10/circle_schema.fbs
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Original file line number Diff line number Diff line change
Expand Up @@ -87,6 +87,13 @@ enum TensorType : byte {
GGML_Q8_1 = -5,

// MX dtypes
// Current restrictions of MX dtypes
// - MX dtypes are not used for model I/O
// - MX dtypes are used for activations, not for constant inputs (ex. weight)
// - MX dtype's parameters (block size, exponent scale, etc) follows
// OCP Microscaling Formats Specification
// - Model does not have exponent scale data.
// Backend should define and use internally if needed
MXFP4 = -6,
MXINT8 = -7,
}
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7 changes: 7 additions & 0 deletions runtime/libs/circle-schema/circle_schema.fbs
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Original file line number Diff line number Diff line change
Expand Up @@ -87,6 +87,13 @@ enum TensorType : byte {
GGML_Q8_1 = -5,

// MX dtypes
// Current restrictions of MX dtypes
// - MX dtypes are not used for model I/O
// - MX dtypes are used for activations, not for constant inputs (ex. weight)
// - MX dtype's parameters (block size, exponent scale, etc) follows
// OCP Microscaling Formats Specification
// - Model does not have exponent scale data.
// Backend should define and use internally if needed
MXFP4 = -6,
MXINT8 = -7,
}
Expand Down