12 Replies Latest reply on Mar 5, 2014 3:37 PM by bubu

    Standard Portable Intermediate Representation (SPIR)


      What are your plans for the Standard Portable Intermediate Representation SPIR ( OpenCL portable and vendor-independent IL ).Do you plan to update your SKA tool with it+


      Just curious.


      If you don-t know whats SPIR, take a look to


        • Re: Standard Portable Intermediate Representation (SPIR)

          I must say we're very excited about that.

          FINALLY Khronos undestood no commercial app would use OpenCL if they have to release the kernel source code.

          So, are you going to create some kind of CUDA-like nvcc.exe/DirectX fxc.exe compiler to allow us to precompile our kernels into an intermediate language finally, yay?

          • Re: Standard Portable Intermediate Representation (SPIR)

            So... how's going the SPIR implementation? We're very excited about it here because our company is using CUDA because we don't want to distribute our sources ...



              • Re: Standard Portable Intermediate Representation (SPIR)

                AFAIK these are the contents of an AMD OpenCL ELF image:

                - OpenCL source code

                - LLVMIR - it's the ocl source compiled/preoptimized into a binary representation

                - AMD_IL - it's generated from LLVMIR (you called it Radeon IL), it is in text, not binary. It's targeted to specific hardware.

                - EXE - the old CAL ELF image, compiled and optimized from the previous AMD_IL section. It's a standalone elf image, can be used in CAL directly.

                    The EXE section contains 2 subsections:

                    - AMD_IL binary representation.

                    - ISA microcode that can be uploaded to the hardware as it is.


                I think, the functionality you want can be done with the LLVMIR section:

                - There will be no OpenCL source in the file.

                - Also it will be hardware independent.


                Just compile the kernel with "-fno-bin-source -fbin-llvmir -fno-bin-amdil -fno-bin-exe" parameters, and it will contain only a binary LLVMIR section.

              • Re: Standard Portable Intermediate Representation (SPIR)

                Any progress on this, pls, AMD?

                  • Re: Standard Portable Intermediate Representation (SPIR)

                    just found out that new catalyst 14.1 beta drivers expose cl_khr_spir extension.

                      • Re: Re: Standard Portable Intermediate Representation (SPIR)

                        I confirm this (see last extension bellow). Does this mean that SPIR is already implemented in the AMD driver?


                          Platform Name:                                 AMD Accelerated Parallel Processing
                        Number of devices:                               2
                          Device Type:                                   CL_DEVICE_TYPE_GPU
                          Device ID:                                     4098
                          Board name:                                    AMD Radeon HD 7700 Series
                          Device Topology:                               PCI[ B#5, D#0, F#0 ]
                          Max compute units:                             8
                          Max work items dimensions:                     3
                            Max work items[0]:                           256
                            Max work items[1]:                           256
                            Max work items[2]:                           256
                          Max work group size:                           256
                          Preferred vector width char:                   4
                          Preferred vector width short:                  2
                          Preferred vector width int:                    1
                          Preferred vector width long:                   1
                          Preferred vector width float:                  1
                          Preferred vector width double:                 1
                          Native vector width char:                      4
                          Native vector width short:                     2
                          Native vector width int:                       1
                          Native vector width long:                      1
                          Native vector width float:                     1
                          Native vector width double:                    1
                          Max clock frequency:                           820Mhz
                          Address bits:                                  32
                          Max memory allocation:                         685349273
                          Image support:                                 Yes
                          Max number of images read arguments:           128
                          Max number of images write arguments:          8
                          Max image 2D width:                            16384
                          Max image 2D height:                           16384
                          Max image 3D width:                            2048
                          Max image 3D height:                           2048
                          Max image 3D depth:                            2048
                          Max samplers within kernel:                    16
                          Max size of kernel argument:                   1024
                          Alignment (bits) of base address:              2048
                          Minimum alignment (bytes) for any datatype:    128
                          Single precision floating point capability
                            Denorms:                                     No
                            Quiet NaNs:                                  Yes
                            Round to nearest even:                       Yes
                            Round to zero:                               Yes
                            Round to +ve and infinity:                   Yes
                            IEEE754-2008 fused multiply-add:             Yes
                          Cache type:                                    Read/Write
                          Cache line size:                               64
                          Cache size:                                    16384
                          Global memory size:                            802160640
                          Constant buffer size:                          65536
                          Max number of constant args:                   8
                          Local memory type:                             Scratchpad
                          Local memory size:                             32768
                          Kernel Preferred work group size multiple:     64
                          Error correction support:                      0
                          Unified memory for Host and Device:            0
                          Profiling timer resolution:                    1
                          Device endianess:                              Little
                          Available:                                     Yes
                          Compiler available:                            Yes
                          Execution capabilities:
                            Execute OpenCL kernels:                      Yes
                            Execute native function:                     No
                          Queue properties:
                            Out-of-Order:                                No
                            Profiling :                                  Yes
                          Platform ID:                                   0xb7446660
                          Name:                                          Capeverde
                          Vendor:                                        Advanced Micro Devices, Inc.
                          Device OpenCL C version:                       OpenCL C 1.2
                          Driver version:                                1411.4 (VM)
                          Profile:                                       FULL_PROFILE
                          Version:                                       OpenCL 1.2 AMD-APP (1411.4)
                          Extensions:                                    cl_khr_fp64 cl_amd_fp64 cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_int64_base_atomics cl_khr_int64_extended_atomics cl_khr_3d_image_writes cl_khr_byte_addressable_store cl_khr_gl_sharing cl_ext_atomic_counters_32 cl_amd_device_attribute_query cl_amd_vec3 cl_amd_printf cl_amd_media_ops cl_amd_media_ops2 cl_amd_popcnt cl_khr_image2d_from_buffer cl_khr_spir