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Add fp8/fp6/fp4 types #158

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Merged
tqchen merged 4 commits into from
Mar 10, 2025
Merged

Add fp8/fp6/fp4 types #158

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1ab3fb1
add fp8/fp6/fp4 types
leofang Feb 13, 2025
46122b1
incorporate review comments to ensure we allow packed layouts for now
leofang Feb 22, 2025
ed3015f
Merge branch 'main' into exotic
leofang Feb 22, 2025
a0a1597
add notes on endianness of packed data; add is_padded bit mask
leofang Mar 7, 2025
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14 changes: 14 additions & 0 deletions include/dlpack/dlpack.h
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Original file line number Diff line number Diff line change
Expand Up @@ -157,6 +157,20 @@ typedef enum {
kDLComplex = 5U,
/*! \brief boolean */
kDLBool = 6U,
/*! \brief FP8 data types. Must set DLDataType.bits=8. */
kDLFloat8_e3m4 = 7U,
kDLFloat8_e4m3 = 8U,
kDLFloat8_e4m3b11fnuz = 9U,
kDLFloat8_e4m3fn = 10U,
Comment on lines +162 to +164
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@MasterJH5574 MasterJH5574 Mar 6, 2025

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One quick question: what's the spec difference between e4m3 and e4m3fn?

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@seberg seberg Mar 6, 2025

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https://github.com/jax-ml/ml_dtypes (linking there may make sense)

kDLFloat8_e4m3fnuz = 11U,
kDLFloat8_e5m2 = 12U,
kDLFloat8_e5m2fnuz = 13U,
kDLFloat8_e8m0fnu = 14U,
/*! \brief FP6 data types. Must set DLDataType.bits=6. */
kDLFloat6_e2m3fn = 15U,
kDLFloat6_e3m2fn = 16U,
/*! \brief FP4 data types. Must set DLDataType.bits=4. */
kDLFloat4_e2m1fn = 17U,
} DLDataTypeCode;

/*!
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