[llvm] r317855 - [AMDGPU] Update code object description
Tony Tye via llvm-commits
llvm-commits at lists.llvm.org
Thu Nov 9 17:00:55 PST 2017
Author: t-tye
Date: Thu Nov 9 17:00:54 2017
New Revision: 317855
URL: http://llvm.org/viewvc/llvm-project?rev=317855&view=rev
Log:
[AMDGPU] Update code object description
- Use ELF header flags to identify processor.
- Remove isa note record.
- Add target feature section.
- Make metadata for NumVGPRs, NumSGPRs and MaxFlatWorkGroupSize required.
- Add FixedWorkGroupSize to CodeProps metadata.
- Add ReqdWorkGroupSize* to kernel descriptor and move MaxFlatWorkGroupSize to be adjacent.
- Move IsXNACKEnabled in the kernel descriptor to be at the end of the unused flags.
- Remove IsDynamicCallStack from the metadata and kernel descriptor.
- Remove legacy debugger metadata.
- Remove old XNACK enabled processor names.
Differential Revision: https://reviews.llvm.org/D39828
Modified:
llvm/trunk/docs/AMDGPUUsage.rst
Modified: llvm/trunk/docs/AMDGPUUsage.rst
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/docs/AMDGPUUsage.rst?rev=317855&r1=317854&r2=317855&view=diff
==============================================================================
--- llvm/trunk/docs/AMDGPUUsage.rst (original)
+++ llvm/trunk/docs/AMDGPUUsage.rst Thu Nov 9 17:00:54 2017
@@ -23,50 +23,55 @@ Target Triples
Use the ``clang -target <Architecture>-<Vendor>-<OS>-<Environment>`` option to
specify the target triple:
- .. table:: AMDGPU Target Triples
- :name: amdgpu-target-triples-table
+ .. table:: AMDGPU Architectures
+ :name: amdgpu-architecture-table
- ============ ======== ========= ===========
- Architecture Vendor OS Environment
- ============ ======== ========= ===========
- r600 amd <empty> <empty>
- amdgcn amd <empty> <empty>
- amdgcn amd amdhsa <empty>
- amdgcn amd amdhsa opencl
- amdgcn amd amdhsa amdgizcl
- amdgcn amd amdhsa amdgiz
- amdgcn amd amdhsa hcc
- ============ ======== ========= ===========
-
-``r600-amd--``
- Supports AMD GPUs HD2XXX-HD6XXX for graphics and compute shaders executed on
- the MESA runtime.
-
-``amdgcn-amd--``
- Supports AMD GPUs GCN GFX6 onwards for graphics and compute shaders executed on
- the MESA runtime.
-
-``amdgcn-amd-amdhsa-``
- Supports AMD GCN GPUs GFX6 onwards for compute kernels executed on HSA [HSA]_
- compatible runtimes such as AMD's ROCm [AMD-ROCm]_.
-
-``amdgcn-amd-amdhsa-opencl``
- Supports AMD GCN GPUs GFX6 onwards for OpenCL compute kernels executed on HSA
- [HSA]_ compatible runtimes such as AMD's ROCm [AMD-ROCm]_. See
- :ref:`amdgpu-opencl`.
-
-``amdgcn-amd-amdhsa-amdgizcl``
- Same as ``amdgcn-amd-amdhsa-opencl`` except a different address space mapping
- is used (see :ref:`amdgpu-address-spaces`).
-
-``amdgcn-amd-amdhsa-amdgiz``
- Same as ``amdgcn-amd-amdhsa-`` except a different address space mapping is
- used (see :ref:`amdgpu-address-spaces`).
-
-``amdgcn-amd-amdhsa-hcc``
- Supports AMD GCN GPUs GFX6 onwards for AMD HC language compute kernels
- executed on HSA [HSA]_ compatible runtimes such as AMD's ROCm [AMD-ROCm]_. See
- :ref:`amdgpu-hcc`.
+ ============ ==============================================================
+ Architecture Description
+ ============ ==============================================================
+ ``r600`` AMD GPUs HD2XXX-HD6XXX for graphics and compute shaders.
+ ``amdgcn`` AMD GPUs GCN GFX6 onwards for graphics and compute shaders.
+ ============ ==============================================================
+
+ .. table:: AMDGPU Vendors
+ :name: amdgpu-vendor-table
+
+ ============ ==============================================================
+ Vendor Description
+ ============ ==============================================================
+ ``amd`` Can be used for all AMD GPU usage.
+ ``mesa3d`` Can be used if the OS is ``mesa3d``.
+ ============ ==============================================================
+
+ .. table:: AMDGPU Operating Systems
+ :name: amdgpu-os-table
+
+ ============== ============================================================
+ OS Description
+ ============== ============================================================
+ *<empty>* Defaults to the *unknown* OS.
+ ``amdhsa`` Compute kernels executed on HSA [HSA]_ compatible runtimes
+ such as AMD's ROCm [AMD-ROCm]_.
+ ``amdpal`` Graphic shaders and compute kernels executed on AMD PAL
+ runtime.
+ ``mesa3d`` Graphic shaders and compute kernels executed on Mesa 3D
+ runtime.
+ ============== ============================================================
+
+ .. table:: AMDGPU Environments
+ :name: amdgpu-environment-table
+
+ ============ ==============================================================
+ Environment Description
+ ============ ==============================================================
+ *<empty>* Defaults to ``opencl``.
+ ``opencl`` OpenCL compute kernel (see :ref:`amdgpu-opencl`).
+ ``amdgizcl`` Same as ``opencl`` except a different address space mapping is
+ used (see :ref:`amdgpu-address-spaces`).
+ ``amdgiz`` Same as ``opencl`` except a different address space mapping is
+ used (see :ref:`amdgpu-address-spaces`).
+ ``hcc`` AMD HC language compute kernel (see :ref:`amdgpu-hcc`).
+ ============ ==============================================================
.. _amdgpu-processors:
@@ -77,139 +82,179 @@ Use the ``clang -mcpu <Processor>`` opti
names from both the *Processor* and *Alternative Processor* can be used.
.. table:: AMDGPU Processors
- :name: amdgpu-processors-table
+ :name: amdgpu-processor-table
- ========== =========== ============ ===== ======= ==================
- Processor Alternative Target dGPU/ Runtime Example
- Processor Triple APU Support Products
- Architecture
- ========== =========== ============ ===== ======= ==================
+ =========== =============== ============ ===== ======= ==================
+ Processor Alternative Target dGPU/ ROCm Example
+ Processor Triple APU Support Products
+ Architecture
+ =========== =============== ============ ===== ======= ==================
**Radeon HD 2000/3000 Series (R600)** [AMD-RADEON-HD-2000-3000]_
- --------------------------------------------------------------------
- r600 r600 dGPU
- r630 r600 dGPU
- rs880 r600 dGPU
- rv670 r600 dGPU
+ -------------------------------------------------------------------------
+ ``r600`` ``r600`` dGPU
+ ``r630`` ``r600`` dGPU
+ ``rs880`` ``r600`` dGPU
+ ``rv670`` ``r600`` dGPU
**Radeon HD 4000 Series (R700)** [AMD-RADEON-HD-4000]_
- --------------------------------------------------------------------
- rv710 r600 dGPU
- rv730 r600 dGPU
- rv770 r600 dGPU
+ -------------------------------------------------------------------------
+ ``rv710`` ``r600`` dGPU
+ ``rv730`` ``r600`` dGPU
+ ``rv770`` ``r600`` dGPU
**Radeon HD 5000 Series (Evergreen)** [AMD-RADEON-HD-5000]_
- --------------------------------------------------------------------
- cedar r600 dGPU
- redwood r600 dGPU
- sumo r600 dGPU
- juniper r600 dGPU
- cypress r600 dGPU
+ -------------------------------------------------------------------------
+ ``cedar`` ``r600`` dGPU
+ ``redwood`` ``r600`` dGPU
+ ``sumo`` ``r600`` dGPU
+ ``juniper`` ``r600`` dGPU
+ ``cypress`` ``r600`` dGPU
**Radeon HD 6000 Series (Northern Islands)** [AMD-RADEON-HD-6000]_
- --------------------------------------------------------------------
- barts r600 dGPU
- turks r600 dGPU
- caicos r600 dGPU
- cayman r600 dGPU
+ -------------------------------------------------------------------------
+ ``barts`` ``r600`` dGPU
+ ``turks`` ``r600`` dGPU
+ ``caicos`` ``r600`` dGPU
+ ``cayman`` ``r600`` dGPU
**GCN GFX6 (Southern Islands (SI))** [AMD-GCN-GFX6]_
- --------------------------------------------------------------------
- gfx600 - tahiti amdgcn dGPU
- gfx601 - pitcairn amdgcn dGPU
- - verde
- - oland
- - hainan
+ -------------------------------------------------------------------------
+ ``gfx600`` - ``tahiti`` ``amdgcn`` dGPU
+ ``gfx601`` - ``pitcairn`` ``amdgcn`` dGPU
+ - ``verde``
+ - ``oland``
+ - ``hainan``
**GCN GFX7 (Sea Islands (CI))** [AMD-GCN-GFX7]_
- --------------------------------------------------------------------
- gfx700 - bonaire amdgcn dGPU - Radeon HD 7790
- - Radeon HD 8770
- - R7 260
- - R7 260X
- \ - kaveri amdgcn APU - A6-7000
- - A6 Pro-7050B
- - A8-7100
- - A8 Pro-7150B
- - A10-7300
- - A10 Pro-7350B
- - FX-7500
- - A8-7200P
- - A10-7400P
- - FX-7600P
- gfx701 - hawaii amdgcn dGPU ROCm - FirePro W8100
- - FirePro W9100
- - FirePro S9150
- - FirePro S9170
- gfx702 dGPU ROCm - Radeon R9 290
- - Radeon R9 290x
- - Radeon R390
- - Radeon R390x
- gfx703 - kabini amdgcn APU - E1-2100
- - mullins - E1-2200
- - E1-2500
- - E2-3000
- - E2-3800
- - A4-5000
- - A4-5100
- - A6-5200
- - A4 Pro-3340B
+ -------------------------------------------------------------------------
+ ``gfx700`` - ``bonaire`` ``amdgcn`` dGPU - Radeon HD 7790
+ - Radeon HD 8770
+ - R7 260
+ - R7 260X
+ \ - ``kaveri`` ``amdgcn`` APU - A6-7000
+ - A6 Pro-7050B
+ - A8-7100
+ - A8 Pro-7150B
+ - A10-7300
+ - A10 Pro-7350B
+ - FX-7500
+ - A8-7200P
+ - A10-7400P
+ - FX-7600P
+ ``gfx701`` - ``hawaii`` ``amdgcn`` dGPU ROCm - FirePro W8100
+ - FirePro W9100
+ - FirePro S9150
+ - FirePro S9170
+ ``gfx702`` ``amdgcn`` dGPU ROCm - Radeon R9 290
+ - Radeon R9 290x
+ - Radeon R390
+ - Radeon R390x
+ ``gfx703`` - ``kabini`` ``amdgcn`` APU - E1-2100
+ - ``mullins`` - E1-2200
+ - E1-2500
+ - E2-3000
+ - E2-3800
+ - A4-5000
+ - A4-5100
+ - A6-5200
+ - A4 Pro-3340B
**GCN GFX8 (Volcanic Islands (VI))** [AMD-GCN-GFX8]_
- --------------------------------------------------------------------
- gfx800 - iceland amdgcn dGPU - FirePro S7150
- - FirePro S7100
- - FirePro W7100
- - Radeon R285
- - Radeon R9 380
- - Radeon R9 385
- - Mobile FirePro
- M7170
- gfx801 - carrizo amdgcn APU - A6-8500P
- - Pro A6-8500B
- - A8-8600P
- - Pro A8-8600B
- - FX-8800P
- - Pro A12-8800B
- \ amdgcn APU ROCm - A10-8700P
- - Pro A10-8700B
- - A10-8780P
- \ amdgcn APU - A10-9600P
- - A10-9630P
- - A12-9700P
- - A12-9730P
- - FX-9800P
- - FX-9830P
- \ amdgcn APU - E2-9010
- - A6-9210
- - A9-9410
- gfx802 - tonga amdgcn dGPU ROCm Same as gfx800
- gfx803 - fiji amdgcn dGPU ROCm - Radeon R9 Nano
- - Radeon R9 Fury
- - Radeon R9 FuryX
- - Radeon Pro Duo
- - FirePro S9300x2
- - Radeon Instinct MI8
- \ - polaris10 amdgcn dGPU ROCm - Radeon RX 470
- - Radeon RX 480
- - Radeon Instinct MI6
- \ - polaris11 amdgcn dGPU ROCm - Radeon RX 460
- gfx804 amdgcn dGPU Same as gfx803
- gfx810 - stoney amdgcn APU
+ -------------------------------------------------------------------------
+ ``gfx800`` - ``iceland`` ``amdgcn`` dGPU - FirePro S7150
+ - FirePro S7100
+ - FirePro W7100
+ - Radeon R285
+ - Radeon R9 380
+ - Radeon R9 385
+ - Mobile FirePro
+ M7170
+ ``gfx801`` - ``carrizo`` ``amdgcn`` APU - A6-8500P
+ - Pro A6-8500B
+ - A8-8600P
+ - Pro A8-8600B
+ - FX-8800P
+ - Pro A12-8800B
+ \ ``amdgcn`` APU ROCm - A10-8700P
+ - Pro A10-8700B
+ - A10-8780P
+ \ ``amdgcn`` APU - A10-9600P
+ - A10-9630P
+ - A12-9700P
+ - A12-9730P
+ - FX-9800P
+ - FX-9830P
+ \ ``amdgcn`` APU - E2-9010
+ - A6-9210
+ - A9-9410
+ ``gfx802`` - ``tonga`` ``amdgcn`` dGPU ROCm Same as gfx800
+ ``gfx803`` - ``fiji`` ``amdgcn`` dGPU ROCm - Radeon R9 Nano
+ - Radeon R9 Fury
+ - Radeon R9 FuryX
+ - Radeon Pro Duo
+ - FirePro S9300x2
+ - Radeon Instinct MI8
+ \ - ``polaris10`` ``amdgcn`` dGPU ROCm - Radeon RX 470
+ - Radeon RX 480
+ - Radeon Instinct MI6
+ \ - ``polaris11`` ``amdgcn`` dGPU ROCm - Radeon RX 460
+ ``gfx810`` - ``stoney`` ``amdgcn`` APU
**GCN GFX9** [AMD-GCN-GFX9]_
- --------------------------------------------------------------------
- gfx900 amdgcn dGPU - Radeon Vega
- Frontier Edition
- - Radeon RX Vega 56
- - Radeon RX Vega 64
- - Radeon RX Vega 64
- Liquid
- - Radeon Instinct MI25
- gfx901 amdgcn dGPU ROCm Same as gfx900
- except XNACK is
- enabled
- gfx902 amdgcn APU *TBA*
-
- .. TODO
- Add product
- names.
- gfx903 amdgcn APU Same as gfx902
- except XNACK is
- enabled
- ========== =========== ============ ===== ======= ==================
+ -------------------------------------------------------------------------
+ ``gfx900`` ``amdgcn`` dGPU ROCm - Radeon Vega
+ Frontier Edition
+ - Radeon RX Vega 56
+ - Radeon RX Vega 64
+ - Radeon RX Vega 64
+ Liquid
+ - Radeon Instinct MI25
+ ``gfx902`` ``amdgcn`` APU *TBA*
+
+ .. TODO
+ Add product
+ names.
+ =========== =============== ============ ===== ======= ==================
+
+.. _amdgpu-target-features:
+
+Target Features
+---------------
+
+Target features control how code is generated to support certain
+features. Not all target features are supported by all processors. The
+runtime must ensure that the features supported by the device used to
+execute the code match the features enabled when generating the
+code. A mismatch of features may result in incorrect execution, or a
+reduction in performance.
+
+Use the ``clang -m[no-]<TargetFeature>`` option to specify the AMD GPU
+target features.
+
+For example:
+
+``-mxnack``
+ Enable the *XNACK* feature.
+``-mno-xnack``
+ Disable the *XNACK* feature.
+
+ .. table:: AMDGPU Target Features
+ :name: amdgpu-target-feature-table
+
+ ============== ======== ==================================================
+ Target Feature Default Description
+ ============== ======== ==================================================
+ -m[no-]xnack disabled Enable/disable generating code that has
+ memory clauses that are compatible with
+ having XNACK replay enabled.
+
+ This is used for demand paging and page
+ migration. If XNACK replay is enabled in
+ the device, then if a page fault occurs
+ the code may execute incorrectly if the
+ XNACK feature is not enabled. Executing
+ code that has the feature enabled on a
+ device that does not have XNACK replay
+ enabled will execute correctly, but may
+ be less performant than code with the
+ feature disabled.
+
+ This feature is supported by the
+ ``amdgcn`` architecture for GFX7-GFX9.
+ ============== ======== ==================================================
.. _amdgpu-address-spaces:
@@ -268,14 +313,14 @@ The memory model supported is based on t
based in turn on HRF-indirect with scope inclusion [HRF]_. The happens-before
relation is transitive over the synchonizes-with relation independent of scope,
and synchonizes-with allows the memory scope instances to be inclusive (see
-table :ref:`amdgpu-amdhsa-llvm-sync-scopes-amdhsa-table`).
+table :ref:`amdgpu-amdhsa-llvm-sync-scopes-table`).
This is different to the OpenCL [OpenCL]_ memory model which does not have scope
inclusion and requires the memory scopes to exactly match. However, this
is conservatively correct for OpenCL.
- .. table:: AMDHSA LLVM Sync Scopes for AMDHSA
- :name: amdgpu-amdhsa-llvm-sync-scopes-amdhsa-table
+ .. table:: AMDHSA LLVM Sync Scopes
+ :name: amdgpu-amdhsa-llvm-sync-scopes-table
================ ==========================================================
LLVM Sync Scope Description
@@ -364,16 +409,18 @@ The AMDGPU backend uses the following EL
========================== ===============================
``e_ident[EI_CLASS]`` ``ELFCLASS64``
``e_ident[EI_DATA]`` ``ELFDATA2LSB``
- ``e_ident[EI_OSABI]`` ``ELFOSABI_AMDGPU_HSA``,
- ``ELFOSABI_AMDGPU_PAL`` or
- ``ELFOSABI_AMDGPU_MESA3D``
- ``e_ident[EI_ABIVERSION]`` ``ELFABIVERSION_AMDGPU_HSA``,
- ``ELFABIVERSION_AMDGPU_PAL`` or
- ``ELFABIVERSION_AMDGPU_MESA3D``
- ``e_type`` ``ET_REL`` or ``ET_DYN``
+ ``e_ident[EI_OSABI]`` - ``ELFOSABI_NONE``
+ - ``ELFOSABI_AMDGPU_HSA``
+ - ``ELFOSABI_AMDGPU_PAL``
+ - ``ELFOSABI_AMDGPU_MESA3D``
+ ``e_ident[EI_ABIVERSION]`` - ``ELFABIVERSION_AMDGPU_HSA``
+ - ``ELFABIVERSION_AMDGPU_PAL``
+ - ``ELFABIVERSION_AMDGPU_MESA3D``
+ ``e_type`` - ``ET_REL``
+ - ``ET_DYN``
``e_machine`` ``EM_AMDGPU``
``e_entry`` 0
- ``e_flags`` 0
+ ``e_flags`` See :ref:`amdgpu-elf-header-e_flags-table`
========================== ===============================
..
@@ -385,6 +432,7 @@ The AMDGPU backend uses the following EL
Name Value
=============================== =====
``EM_AMDGPU`` 224
+ ``ELFOSABI_NONE`` 0
``ELFOSABI_AMDGPU_HSA`` 64
``ELFOSABI_AMDGPU_PAL`` 65
``ELFOSABI_AMDGPU_MESA3D`` 66
@@ -394,23 +442,27 @@ The AMDGPU backend uses the following EL
=============================== =====
``e_ident[EI_CLASS]``
- The ELF class is always ``ELFCLASS64``. The AMDGPU backend only supports 64
- bit applications.
+ The ELF class is:
+
+ * ``ELFCLASS32`` for ``r600`` architecture.
+
+ * ``ELFCLASS64`` for ``amdgcn`` architecture which only supports 64
+ bit applications.
``e_ident[EI_DATA]``
- All AMDGPU targets use ELFDATA2LSB for little-endian byte ordering.
+ All AMDGPU targets use ``ELFDATA2LSB`` for little-endian byte ordering.
``e_ident[EI_OSABI]``
- One of the following AMD GPU architecture specific OS ABIs:
+ One of the following AMD GPU architecture specific OS ABIs
+ (see :ref:`amdgpu-os-table`):
- * ``ELFOSABI_AMDGPU_HSA`` is used to specify that the code object conforms to
- the AMD HSA runtime ABI [HSA]_.
+ * ``ELFOSABI_NONE`` for *unknown* OS.
- * ``ELFOSABI_AMDGPU_PAL`` is used to specify that the code object conforms to
- the AMD PAL runtime ABI.
+ * ``ELFOSABI_AMDGPU_HSA`` for ``amdhsa`` OS.
- * ``ELFOSABI_AMDGPU_MESA3D`` is used to specify that the code object conforms
- to the AMD MESA runtime ABI.
+ * ``ELFOSABI_AMDGPU_PAL`` for ``amdpal`` OS.
+
+ * ``ELFOSABI_AMDGPU_MESA3D`` for ``mesa3D`` OS.
``e_ident[EI_ABIVERSION]``
The ABI version of the AMD GPU architecture specific OS ABI to which the code
@@ -423,7 +475,7 @@ The AMDGPU backend uses the following EL
runtime ABI.
* ``ELFABIVERSION_AMDGPU_MESA3D`` is used to specify the version of AMD MESA
- runtime ABI.
+ 3D runtime ABI.
``e_type``
Can be one of the following values:
@@ -439,17 +491,74 @@ The AMDGPU backend uses the following EL
The AMD HSA runtime loader requires a ``ET_DYN`` code object.
``e_machine``
- The value ``EM_AMDGPU`` is used for the machine for all members of the AMD GPU
- architecture family. The specific member is specified in the
- ``NT_AMD_AMDGPU_ISA`` entry in the ``.note`` section (see
- :ref:`amdgpu-note-records`).
+ The value ``EM_AMDGPU`` is used for the machine for all processors supported
+ by the ``r600`` and ``amdgcn`` architectures (see
+ :ref:`amdgpu-processor-table`). The specific processor is specified in the
+ ``EF_AMDGPU_MACH`` bit field of the ``e_flags`` (see
+ :ref:`amdgpu-elf-header-e_flags-table`).
``e_entry``
The entry point is 0 as the entry points for individual kernels must be
selected in order to invoke them through AQL packets.
``e_flags``
- The value is 0 as no flags are used.
+ The AMDGPU backend uses the following ELF header flags:
+
+ .. table:: AMDGPU ELF Header ``e_flags``
+ :name: amdgpu-elf-header-e_flags-table
+
+ ================================= ========== =============================
+ Name Value Description
+ ================================= ========== =============================
+ **AMDGPU Processor Flag** See :ref:`amdgpu-processor-table`.
+ -------------------------------------------- -----------------------------
+ ``EF_AMDGPU_MACH`` 0x000000ff AMDGPU processor selection
+ mask for
+ ``EF_AMDGPU_MACH_xxx`` values
+ defined in
+ :ref:`amdgpu-ef-amdgpu-mach-table`.
+ ================================= ========== =============================
+
+ .. table:: AMDGPU ``EF_AMDGPU_MACH`` Values
+ :name: amdgpu-ef-amdgpu-mach-table
+
+ ================================= ========== =============================
+ Name Value Description (see
+ :ref:`amdgpu-processor-table`)
+ ================================= ========== =============================
+ ``EF_AMDGPU_MACH_NONE`` 0 *not specified*
+ ``EF_AMDGPU_MACH_R600_R600`` 1 ``r600``
+ ``EF_AMDGPU_MACH_R600_R630`` 2 ``r630``
+ ``EF_AMDGPU_MACH_R600_RS880`` 3 ``rs880``
+ ``EF_AMDGPU_MACH_R600_RV670`` 4 ``rv670``
+ ``EF_AMDGPU_MACH_R600_RV710`` 5 ``rv710``
+ ``EF_AMDGPU_MACH_R600_RV730`` 6 ``rv730``
+ ``EF_AMDGPU_MACH_R600_RV770`` 7 ``rv770``
+ ``EF_AMDGPU_MACH_R600_CEDAR`` 8 ``cedar``
+ ``EF_AMDGPU_MACH_R600_REDWOOD`` 9 ``redwood``
+ ``EF_AMDGPU_MACH_R600_SUMO`` 10 ``sumo``
+ ``EF_AMDGPU_MACH_R600_JUNIPER`` 11 ``juniper``
+ ``EF_AMDGPU_MACH_R600_CYPRESS`` 12 ``cypress``
+ ``EF_AMDGPU_MACH_R600_BARTS`` 13 ``barts``
+ ``EF_AMDGPU_MACH_R600_TURKS`` 14 ``turks``
+ ``EF_AMDGPU_MACH_R600_CAICOS`` 15 ``caicos``
+ ``EF_AMDGPU_MACH_R600_CAYMAN`` 16 ``cayman``
+ *reserved* 17-31 Reserved for ``r600``
+ architecture processors.
+ ``EF_AMDGPU_MACH_AMDGCN_GFX600`` 32 ``gfx600``
+ ``EF_AMDGPU_MACH_AMDGCN_GFX601`` 33 ``gfx601``
+ ``EF_AMDGPU_MACH_AMDGCN_GFX700`` 34 ``gfx700``
+ ``EF_AMDGPU_MACH_AMDGCN_GFX701`` 35 ``gfx701``
+ ``EF_AMDGPU_MACH_AMDGCN_GFX702`` 36 ``gfx702``
+ ``EF_AMDGPU_MACH_AMDGCN_GFX703`` 37 ``gfx703``
+ ``EF_AMDGPU_MACH_AMDGCN_GFX800`` 38 ``gfx800``
+ ``EF_AMDGPU_MACH_AMDGCN_GFX801`` 39 ``gfx801``
+ ``EF_AMDGPU_MACH_AMDGCN_GFX802`` 40 ``gfx802``
+ ``EF_AMDGPU_MACH_AMDGCN_GFX803`` 41 ``gfx803``
+ ``EF_AMDGPU_MACH_AMDGCN_GFX810`` 42 ``gfx810``
+ ``EF_AMDGPU_MACH_AMDGCN_GFX900`` 43 ``gfx900``
+ ``EF_AMDGPU_MACH_AMDGCN_GFX902`` 44 ``gfx902``
+ ================================= ========== =============================
Sections
--------
@@ -515,11 +624,11 @@ if needed.
Note Records
------------
-As required by ``ELFCLASS64``, minimal zero byte padding must be generated after
-the ``name`` field to ensure the ``desc`` field is 4 byte aligned. In addition,
-minimal zero byte padding must be generated to ensure the ``desc`` field size is
-a multiple of 4 bytes. The ``sh_addralign`` field of the ``.note`` section must
-be at least 4 to indicate at least 8 byte alignment.
+As required by ``ELFCLASS32`` and ``ELFCLASS64``, minimal zero byte padding must
+be generated after the ``name`` field to ensure the ``desc`` field is 4 byte
+aligned. In addition, minimal zero byte padding must be generated to ensure the
+``desc`` field size is a multiple of 4 bytes. The ``sh_addralign`` field of the
+``.note`` section must be at least 4 to indicate at least 8 byte alignment.
The AMDGPU backend code object uses the following ELF note records in the
``.note`` section. The *Description* column specifies the layout of the note
@@ -537,7 +646,6 @@ Additional note records can be present.
Name Type Description
===== ============================== ======================================
"AMD" ``NT_AMD_AMDGPU_HSA_METADATA`` <metadata null terminated string>
- "AMD" ``NT_AMD_AMDGPU_ISA`` <isa name null terminated string>
===== ============================== ======================================
..
@@ -550,49 +658,9 @@ Additional note records can be present.
============================== =====
*reserved* 0-9
``NT_AMD_AMDGPU_HSA_METADATA`` 10
- ``NT_AMD_AMDGPU_ISA`` 11
+ *reserved* 11
============================== =====
-``NT_AMD_AMDGPU_ISA``
- Specifies the instruction set architecture used by the machine code contained
- in the code object.
-
- This note record is required for code objects containing machine code for
- processors matching the ``amdgcn`` architecture in table
- :ref:`amdgpu-processors`.
-
- The null terminated string has the following syntax:
-
- *architecture*\ ``-``\ *vendor*\ ``-``\ *os*\ ``-``\ *environment*\ ``-``\ *processor*
-
- where:
-
- *architecture*
- The architecture from table :ref:`amdgpu-target-triples-table`.
-
- This is always ``amdgcn`` when the target triple OS is ``amdhsa`` (see
- :ref:`amdgpu-target-triples`).
-
- *vendor*
- The vendor from table :ref:`amdgpu-target-triples-table`.
-
- For the AMDGPU backend this is always ``amd``.
-
- *os*
- The OS from table :ref:`amdgpu-target-triples-table`.
-
- *environment*
- An environment from table :ref:`amdgpu-target-triples-table`, or blank if
- the environment has no affect on the execution of the code object.
-
- For the AMDGPU backend this is currently always blank.
- *processor*
- The processor from table :ref:`amdgpu-processors-table`.
-
- For example:
-
- ``amdgcn-amd-amdhsa--gfx901``
-
``NT_AMD_AMDGPU_HSA_METADATA``
Specifies extensible metadata associated with the code objects executed on HSA
[HSA]_ compatible runtimes such as AMD's ROCm [AMD-ROCm]_. It is required when
@@ -904,10 +972,6 @@ non-AMD key names should be prefixed by
the kernel code. See
:ref:`amdgpu-amdhsa-code-object-kernel-code-properties-metadata-mapping-table`
for the mapping definition.
- "DebugProps" mapping Mapping of properties related to
- the kernel debugging. See
- :ref:`amdgpu-amdhsa-code-object-kernel-debug-properties-metadata-mapping-table`
- for the mapping definition.
================= ============== ========= ================================
..
@@ -1175,9 +1239,9 @@ non-AMD key names should be prefixed by
private address space
memory required for a
work-item in
- bytes. If
- IsDynamicCallstack
- is 1 then additional
+ bytes. If the kernel
+ uses a dynamic call
+ stack then additional
space must be added
to this value for the
call stack.
@@ -1188,7 +1252,7 @@ non-AMD key names should be prefixed by
be a power of 2.
"WavefrontSize" integer Required Wavefront size. Must
be a power of 2.
- "NumSGPRs" integer Number of scalar
+ "NumSGPRs" integer Required Number of scalar
registers used by a
wavefront for
GFX6-GFX9. This
@@ -1204,44 +1268,37 @@ non-AMD key names should be prefixed by
rounded up to the
allocation
granularity.
- "NumVGPRs" integer Number of vector
+ "NumVGPRs" integer Required Number of vector
registers used by
each work-item for
GFX6-GFX9
- "MaxFlatWorkGroupSize" integer Maximum flat
+ "MaxFlatWorkGroupSize" integer Required Maximum flat
work-group size
supported by the
kernel in work-items.
- "IsDynamicCallStack" boolean Indicates if the
- generated machine
- code is using a
- dynamically sized
- call stack.
+ Must be >=1 and
+ consistent with any
+ non-0 values in
+ FixedWorkGroupSize.
+ "FixedWorkGroupSize" sequence of Corresponds to the
+ 3 integers dispatch work-group
+ size X, Y, Z. If
+ omitted, defaults to
+ 0, 0, 0. If an
+ element is non-0 then
+ the kernel must only
+ be launched with a
+ matching corresponding
+ work-group size.
"IsXNACKEnabled" boolean Indicates if the
generated machine
code is capable of
- supporting XNACK.
+ supporting XNACK. See
+ :ref:`amdgpu-target-features`.
============================ ============== ========= =====================
..
- .. table:: AMDHSA Code Object Kernel Debug Properties Metadata Mapping
- :name: amdgpu-amdhsa-code-object-kernel-debug-properties-metadata-mapping-table
-
- =================================== ============== ========= ==============
- String Key Value Type Required? Description
- =================================== ============== ========= ==============
- "DebuggerABIVersion" sequence of
- 2 integers
- "ReservedNumVGPRs" integer
- "ReservedFirstVGPR" integer
- "PrivateSegmentBufferSGPR" integer
- "WavefrontPrivateSegmentOffsetSGPR" integer
- =================================== ============== ========= ==============
-
-.. TODO
- Plan to remove the debug properties metadata.
-
Kernel Dispatch
~~~~~~~~~~~~~~~
@@ -1451,17 +1508,7 @@ CP microcode requires the Kernel descrit
then additional space must
be added to this value for
the call stack.
- 95:64 4 bytes MaxFlatWorkGroupSize Maximum flat work-group
- size supported by the
- kernel in work-items.
- 96 1 bit IsDynamicCallStack Indicates if the generated
- machine code is using a
- dynamically sized call
- stack.
- 97 1 bit IsXNACKEnabled Indicates if the generated
- machine code is capable of
- suppoting XNACK.
- 127:98 30 bits Reserved, must be 0.
+ 127:64 8 bytes Reserved, must be 0.
191:128 8 bytes KernelCodeEntryByteOffset Byte offset (possibly
negative) from base
address of kernel
@@ -1469,7 +1516,30 @@ CP microcode requires the Kernel descrit
entry point instruction
which must be 256 byte
aligned.
- 383:192 24 Reserved, must be 0.
+ 223:192 4 bytes MaxFlatWorkGroupSize Maximum flat work-group
+ size supported by the
+ kernel in work-items. If
+ an exact work-group size
+ is required then must be
+ omitted or 0 and
+ ReqdWorkGroupSize* must
+ be set to non-0.
+ 239:224 2 bytes ReqdWorkGroupSizeX If present and non-0 then
+ the kernel
+ must be executed with the
+ specified work-group size
+ for X.
+ 255:240 2 bytes ReqdWorkGroupSizeY If present and non-0 then
+ the kernel
+ must be executed with the
+ specified work-group size
+ for Y.
+ 271:256 2 bytes ReqdWorkGroupSizeZ If present and non-0 then
+ the kernel
+ must be executed with the
+ specified work-group size
+ for Z.
+ 383:271 14 Reserved, must be 0.
bytes
415:384 4 bytes ComputePgmRsrc1 Compute Shader (CS)
program settings used by
@@ -1509,7 +1579,10 @@ CP microcode requires the Kernel descrit
should always be 0.
457 1 bit EnableSGPRGridWorkgroupCountZ Not implemented in CP and
should always be 0.
- 463:458 6 bits Reserved, must be 0.
+ 462:458 5 bits Reserved, must be 0.
+ 463 1 bit IsXNACKEnabled Indicates if the generated
+ machine code is capable of
+ supporting XNACK.
511:464 6 Reserved, must be 0.
bytes
512 **Total size 64 bytes.**
@@ -1528,7 +1601,7 @@ CP microcode requires the Kernel descrit
granularity is device
specific:
- GFX6-9
+ GFX6-GFX9
- max_vgpr 1..256
- roundup((max_vgpg + 1)
/ 4) - 1
@@ -1540,7 +1613,7 @@ CP microcode requires the Kernel descrit
granularity is device
specific:
- GFX6-8
+ GFX6-GFX8
- max_sgpr 1..112
- roundup((max_sgpg + 1)
/ 8) - 1
@@ -1679,7 +1752,7 @@ CP microcode requires the Kernel descrit
CP is responsible for
filling in
``COMPUTE_PGM_RSRC1.CDBG_USER``.
- 26 1 bit FP16_OVFL GFX6-8
+ 26 1 bit FP16_OVFL GFX6-GFX8
Reserved, must be 0.
GFX9
Wavefront starts execution
@@ -2166,7 +2239,7 @@ Flat Scratch register pair are adjacent
value to the hardware required SGPRn-3 and SGPRn-4 respectively.
The global segment can be accessed either using buffer instructions (GFX6 which
-has V# 64 bit address support), flat instructions (GFX7-9), or global
+has V# 64 bit address support), flat instructions (GFX7-GFX9), or global
instructions (GFX9).
If buffer operations are used then the compiler can generate a V# with the
@@ -2212,7 +2285,7 @@ Offset SGPR registers (see :ref:`amdgpu-
GFX6
Flat scratch is not supported.
-GFX7-8
+GFX7-GFX8
1. The low word of Flat Scratch Init is 32 bit byte offset from
``SH_HIDDEN_PRIVATE_BASE_VIMID`` to the base of scratch backing memory
being managed by SPI for the queue executing the kernel dispatch. This is
@@ -2305,7 +2378,7 @@ For GFX6-GFX9:
same wavefront.
* The vector memory operations are performed as wavefront wide operations and
completion is reported to a wavefront in execution order. The exception is
- that for GFX7-9 ``flat_load/store/atomic`` instructions can report out of
+ that for GFX7-GFX9 ``flat_load/store/atomic`` instructions can report out of
vector memory order if they access LDS memory, and out of LDS operation order
if they access global memory.
* The vector memory operations access a single vector L1 cache shared by all
@@ -2332,7 +2405,7 @@ For GFX6-GFX9:
* The L2 cache can be kept coherent with other agents on some targets, or ranges
of virtual addresses can be set up to bypass it to ensure system coherence.
-Private address space uses ``buffer_load/store`` using the scratch V# (GFX6-8),
+Private address space uses ``buffer_load/store`` using the scratch V# (GFX6-GFX8),
or ``scratch_load/store`` (GFX9). Since only a single thread is accessing the
memory, atomic memory orderings are not meaningful and all accesses are treated
as non-atomic.
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