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precision_
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56de4cda80 |
@@ -9,16 +9,14 @@
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Data types and precision support
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*************************************************************
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This topic lists the supported data types of AMD GPUs and ROCm libraries.
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Corresponding :doc:`HIP <hip:index>` data types are also noted.
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This topic lists the data types support on AMD GPUs, ROCm libraries along
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with corresponding :doc:`HIP <hip:index>` data types.
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Integral types
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==========================================
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==============
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The signed and unsigned integral types supported by ROCm are listed in
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the following table, along with their corresponding HIP type and a short
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description.
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the following table.
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.. list-table::
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:header-rows: 1
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@@ -48,10 +46,9 @@ description.
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.. _precision_support_floating_point_types:
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Floating-point types
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==========================================
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====================
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The floating-point types supported by ROCm are listed in the following
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table, along with their corresponding HIP type and a short description.
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The floating-point types supported by ROCm are listed in the following table.
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.. image:: ../data/about/compatibility/floating-point-data-types.png
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:alt: Supported floating-point types
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@@ -66,18 +63,18 @@ table, along with their corresponding HIP type and a short description.
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- Description
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*
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- float8 (E4M3)
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- ``-``
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- ``__hip_fp8_e4m3_fnuz``
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- An 8-bit floating-point number that mostly follows IEEE-754 conventions
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and **S1E4M3** bit layout, as described in `8-bit Numerical Formats for Deep Neural Networks <https://arxiv.org/abs/2206.02915>`_ ,
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with expanded range and no infinity or signed zero. NaN is
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represented as negative zero.
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and **S1E4M3** bit layout, as described in `8-bit Numerical Formats for Deep Neural Networks <https://arxiv.org/abs/2206.02915>`_,
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with expanded range and no infinity or signed zero. NaN is represented
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as negative zero.
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*
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- float8 (E5M2)
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- ``-``
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- ``__hip_fp8_e5m2_fnuz``
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- An 8-bit floating-point number mostly following IEEE-754 conventions and
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**S1E5M2** bit layout, as described in `8-bit Numerical Formats for Deep Neural Networks <https://arxiv.org/abs/2206.02915>`_ ,
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with expanded range and no infinity or signed zero. NaN is
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represented as negative zero.
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**S1E5M2** bit layout, as described in `8-bit Numerical Formats for Deep Neural Networks <https://arxiv.org/abs/2206.02915>`_,
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with expanded range and no infinity or signed zero. NaN is represented
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as negative zero.
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*
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- float16
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- ``half``
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@@ -90,7 +87,7 @@ table, along with their corresponding HIP type and a short description.
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format.
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*
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- tensorfloat32
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- ``-``
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- Not available
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- A floating-point number that occupies 32 bits or less of storage,
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providing improved range compared to half (16-bit) format, at
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(potentially) greater throughput than single-precision (32-bit) formats.
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@@ -117,12 +114,15 @@ table, along with their corresponding HIP type and a short description.
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* In some AMD documents and articles, float8 (E5M2) is referred to as bfloat8.
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ROCm support icons
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==========================================
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* The :doc:`low precision floating point types page <hip:reference/low_fp_types>`
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describes how to use these types in HIP with examples.
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In the following sections, icons represent the level of support. These
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icons, described in the following table, are also used in the library data type
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support pages.
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Level of support definitions
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============================
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In the following sections, icons represent the level of support. These icons,
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described in the following table, are also used in the library data type support
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pages.
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.. list-table::
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:header-rows: 1
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@@ -130,6 +130,11 @@ support pages.
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*
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- Icon
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- Definition
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*
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- NA
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- Not applicable
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*
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- ❌
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- Not supported
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@@ -158,16 +163,15 @@ support pages.
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* Any type can be emulated by software, but this page does not cover such
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cases.
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Hardware data type support
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Data type support by Hardware Architecture
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==========================================
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The following tables provide information about AMD Instinct accelerators support
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for various data types. The MI200 series GPUs, which include MI210, MI250, and
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MI250X, are based on the CDNA2 architecture. The MI300 series GPUs, consisting
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of MI300A, MI300X, and MI325X, are built on the CDNA3 architecture.
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The MI200 series GPUs, which include MI210, MI250, and MI250X, are based on the
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CDNA2 architecture. The MI300 series GPUs, consisting of MI300A, MI300X, and
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MI325X, are based on the CDNA3 architecture.
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Compute units support
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-------------------------------------------------------------------------------
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---------------------
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The following table lists data type support for compute units.
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@@ -248,7 +252,7 @@ The following table lists data type support for compute units.
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- ✅
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Matrix core support
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-------------------------------------------------------------------------------
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-------------------
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The following table lists data type support for AMD GPU matrix cores.
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@@ -329,7 +333,7 @@ The following table lists data type support for AMD GPU matrix cores.
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- ✅
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Atomic operations support
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-------------------------------------------------------------------------------
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-------------------------
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The following table lists data type support for atomic operations.
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@@ -416,14 +420,14 @@ The following table lists data type support for atomic operations.
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performance impact when they frequently access the same memory address.
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Data type support in ROCm libraries
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==========================================
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===================================
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ROCm library support for int8, float8 (E4M3), float8 (E5M2), int16, float16,
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bfloat16, int32, tensorfloat32, float32, int64, and float64 is listed in the
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following tables.
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Libraries input/output type support
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-------------------------------------------------------------------------------
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-----------------------------------
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The following tables list ROCm library support for specific input and output
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data types. Refer to the corresponding library data type support page for a
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@@ -444,37 +448,37 @@ detailed description.
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- int32
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- int64
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*
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- hipSPARSELt (:doc:`details <hipsparselt:reference/data-type-support>`)
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- :doc:`hipSPARSELt <hipsparselt:reference/data-type-support>`
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- ✅/✅
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- ❌/❌
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- ❌/❌
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- ❌/❌
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*
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- rocRAND (:doc:`details <rocrand:api-reference/data-type-support>`)
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- -/✅
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- -/✅
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- -/✅
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- -/✅
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- :doc:`rocRAND <rocrand:api-reference/data-type-support>`
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- NA/✅
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- NA/✅
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- NA/✅
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- NA/✅
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*
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- hipRAND (:doc:`details <hiprand:api-reference/data-type-support>`)
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- -/✅
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- -/✅
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- -/✅
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- -/✅
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- :doc:`hipRAND <hiprand:api-reference/data-type-support>`
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- NA/✅
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- NA/✅
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- NA/✅
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- NA/✅
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*
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- rocPRIM (:doc:`details <rocprim:reference/data-type-support>`)
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- :doc:`rocPRIM <rocprim:reference/data-type-support>`
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- ✅/✅
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- ✅/✅
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- ✅/✅
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- ✅/✅
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*
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- hipCUB (:doc:`details <hipcub:api-reference/data-type-support>`)
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- :doc:`hipCUB <hipcub:api-reference/data-type-support>`
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- ✅/✅
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- ✅/✅
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- ✅/✅
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- ✅/✅
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*
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- rocThrust (:doc:`details <rocthrust:data-type-support>`)
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- :doc:`rocThrust <rocthrust:data-type-support>`
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- ✅/✅
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- ✅/✅
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- ✅/✅
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@@ -496,7 +500,7 @@ detailed description.
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- float32
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- float64
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*
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- hipSPARSELt (:doc:`details <hipsparselt:reference/data-type-support>`)
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- :doc:`hipSPARSELt <hipsparselt:reference/data-type-support>`
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- ❌/❌
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- ❌/❌
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- ✅/✅
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@@ -505,25 +509,25 @@ detailed description.
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- ❌/❌
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- ❌/❌
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*
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- rocRAND (:doc:`details <rocrand:api-reference/data-type-support>`)
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- -/❌
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- -/❌
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- -/✅
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- -/❌
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- -/❌
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- -/✅
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- -/✅
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- :doc:`rocRAND <rocrand:api-reference/data-type-support>`
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- NA/❌
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- NA/❌
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- NA/✅
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- NA/❌
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- NA/❌
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- NA/✅
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- NA/✅
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*
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- hipRAND (:doc:`details <hiprand:api-reference/data-type-support>`)
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- -/❌
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- -/❌
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- -/✅
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- -/❌
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- -/❌
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- -/✅
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- -/✅
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- :doc:`hipRAND <hiprand:api-reference/data-type-support>`
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- NA/❌
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- NA/❌
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- NA/✅
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- NA/❌
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- NA/❌
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- NA/✅
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- NA/✅
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*
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- rocPRIM (:doc:`details <rocprim:reference/data-type-support>`)
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- :doc:`rocPRIM <rocprim:reference/data-type-support>`
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- ❌/❌
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- ❌/❌
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- ✅/✅
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@@ -532,7 +536,7 @@ detailed description.
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- ✅/✅
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- ✅/✅
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*
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- hipCUB (:doc:`details <hipcub:api-reference/data-type-support>`)
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- :doc:`hipCUB <hipcub:api-reference/data-type-support>`
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- ❌/❌
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- ❌/❌
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- ✅/✅
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@@ -541,7 +545,7 @@ detailed description.
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- ✅/✅
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- ✅/✅
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*
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- rocThrust (:doc:`details <rocthrust:data-type-support>`)
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- :doc:`rocThrust <rocthrust:data-type-support>`
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- ❌/❌
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- ❌/❌
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- ⚠️/⚠️
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@@ -550,9 +554,14 @@ detailed description.
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- ✅/✅
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- ✅/✅
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.. note::
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As random number generation libraries, rocRAND and hipRAND only specify output
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data types for the random values they generate, with no need for input data
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types.
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Libraries internal calculations type support
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-------------------------------------------------------------------------------
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--------------------------------------------
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The following tables list ROCm library support for specific internal data types.
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Refer to the corresponding library data type support page for a detailed
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@@ -573,7 +582,7 @@ description.
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- int32
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- int64
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*
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- hipSPARSELt (:doc:`details <hipsparselt:reference/data-type-support>`)
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- :doc:`hipSPARSELt <hipsparselt:reference/data-type-support>`
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- ❌
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- ❌
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- ✅
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@@ -596,7 +605,7 @@ description.
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- float32
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- float64
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*
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- hipSPARSELt (:doc:`details <hipsparselt:reference/data-type-support>`)
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- :doc:`hipSPARSELt <hipsparselt:reference/data-type-support>`
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- ❌
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- ❌
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- ❌
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Reference in New Issue
Block a user