https://github.com/halide/Halide
Revision d80bb234b2fee34a37967e59e4e8565a441969b9 authored by Andrew Adams on 19 October 2021, 16:43:07 UTC, committed by GitHub on 19 October 2021, 16:43:07 UTC
* Add a new unsigned division method
It uses averages rounding up instead of averages rounding down, to
reduce instruction count on x86.
Division by 7 before:
vpmulhuw .LCPI0_1(%rip), %ymm0, %ymm1
vpsubw %ymm1, %ymm0, %ymm0
vpsrlw $1, %ymm0, %ymm0
vpaddw %ymm1, %ymm0, %ymm0
vpsrlw $2, %ymm0, %ymm0
Division by 7 after:
vpmulhuw .LCPI0_1(%rip), %ymm0, %ymm1
vpavgw %ymm0, %ymm1, %ymm0
vpsrlw $2, %ymm0, %ymm0
* Remove debugging code
* Add comment elaborating on why this is a good idea 1 parent deeb6bc
- HEAD
- refs/heads/Halide_unsharp
- refs/heads/abadams/align_strided_const_loads
- refs/heads/abadams/alloca
- refs/heads/abadams/atomic_parallel_compiled_in
- refs/heads/abadams/atomic_vector_non_recursive
- refs/heads/abadams/averaging_tree
- refs/heads/abadams/avoid_name_mangling_in_cross_module_dependencies
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- d80bb234b2fee34a37967e59e4e8565a441969b9
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Tip revision: d80bb234b2fee34a37967e59e4e8565a441969b9 authored by Andrew Adams on 19 October 2021, 16:43:07 UTC
Add a new unsigned division method (#6322)
Add a new unsigned division method (#6322)
Tip revision: d80bb23
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| .clang-format | -rw-r--r-- | 1.4 KB |
| .clang-format-ignore | -rw-r--r-- | 265 bytes |
| .clang-tidy | -rw-r--r-- | 1.8 KB |
| .gitattributes | -rw-r--r-- | 342 bytes |
| .gitignore | -rw-r--r-- | 1.1 KB |
| .gitmodules | -rw-r--r-- | 0 bytes |
| CMakeLists.txt | -rw-r--r-- | 5.5 KB |
| CMakePresets.json | -rw-r--r-- | 5.2 KB |
| CODE_OF_CONDUCT.md | -rw-r--r-- | 3.5 KB |
| LICENSE.txt | -rw-r--r-- | 3.2 KB |
| Makefile | -rw-r--r-- | 101.0 KB |
| README.md | -rw-r--r-- | 16.5 KB |
| README_cmake.md | -rw-r--r-- | 69.3 KB |
| README_rungen.md | -rw-r--r-- | 12.1 KB |
| README_webassembly.md | -rw-r--r-- | 8.6 KB |
| run-clang-format.sh | -rwxr-xr-x | 1.4 KB |
| run-clang-tidy.sh | -rwxr-xr-x | 3.2 KB |
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