Detect missing vst1q_f32_x2 and provide replacement if necessary #1358
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betajippity
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Thanks for the fix, but see the suggestions above. |
Which suggestions? I don't see any; apologies if I'm looking in the wrong place. |
cmake/OpenEXRSetup.cmake
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| }" HAS_VLD1) | ||
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| if(NOT HAS_VLD1) | ||
| string(APPEND CMAKE_CXX_FLAGS " -DMISSING_ARM_VLD1") |
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This would be better as a CMake-generated define rather than a compiler flag:
| string(APPEND CMAKE_CXX_FLAGS " -DMISSING_ARM_VLD1") | |
| set(OPENEXR_MISSING_ARM_VLD1" 1) |
Then add:
#cmakedefine OPENEXR_MISSING_ARM_VLD1 0
to cmake/OpenEXRConfigInternal.h.in
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These notes are now implemented; the flag is now set as a CMake-generated define and is in cmake/OpenEXRConfigInternal.h.in.
src/lib/OpenEXR/ImfSimd.h
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| @@ -62,4 +62,17 @@ extern "C" { | |||
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| #if defined (MISSING_ARM_VLD1) | |||
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... and change this to OPENEXR_MISSING_ARM_VLD1 to identify it as an OpenEXR config thing.
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This change is now implemented; the flag is now named OPENEXR_MISSING_ARM_VLD1.
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Oops, I neglected to submit the review, sorry. Should be there now. |
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Whoops, sorry for the bevy of build test failures. I didn't realize that pushing a WIP to the branch on my fork would automatically update the merge request and kick off tests here! |
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Older versions of GCC (< 9) do not provide the vst1q_f32_x2 intrinsic on aarch64, so we must detect when vst1q_f32_x2 is not available and provide our own implementation instead. Signed-off-by: Yining Karl Li <betajippity@gmail.com>
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…demySoftwareFoundation#1358) Older versions of GCC (< 9) do not provide the vst1q_f32_x2 intrinsic on aarch64, so we must detect when vst1q_f32_x2 is not available and provide our own implementation instead. Signed-off-by: Yining Karl Li <betajippity@gmail.com>
…demySoftwareFoundation#1358) Older versions of GCC (< 9) do not provide the vst1q_f32_x2 intrinsic on aarch64, so we must detect when vst1q_f32_x2 is not available and provide our own implementation instead. Signed-off-by: Yining Karl Li <betajippity@gmail.com>
Older versions of GCC (< 9) do not provide the vst1q_f32_x2 intrinsic on aarch64, so we must detect when vst1q_f32_x2 is not available and provide our own implementation instead. Signed-off-by: Yining Karl Li <betajippity@gmail.com>
In ImfDwaCompressorSimd.h, convertFloatToHalf64_neon() uses the vst1q_f32_x2 intrinsic on aarch64. However, older versions of GCC (< 9) do not provide the vst1q_f32_x2 intrinsic on aarch64, so we must detect when vst1q_f32_x2 is not available and provide our own implementation instead.
Specific examples of platforms where this fix is needed are CentOS 8 on aarch64, and NVIDIA's Linux For Tegra 32.x on Jetson Nano.