| 38e380b3c5139c0993495a7a0f040bfe8aa1e9e9 |
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30-Oct-2017 |
Lena Djokic <Lena.Djokic@imgtec.com> |
MIPS: Implement Sum-of-Abs-Differences
Test: test-art-host test-art-target
Change-Id: I32a3e21f96cdcbab2e108d71746670408deb901a
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| 68ca702c800d40b3e1f9aecdb6d5385b3492fda1 |
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27-Sep-2017 |
Aart Bik <ajcbik@google.com> |
Added SAD test. Generalized vector analysis of narrow type.
Rationale:
The new example shows that scalar type of array reference does not
reflect signed-ness or unsigned-ness of vector operation. Instead
the vectorizer's analysis looks at zero or sign extension to determine
what operation is required and passes this as explicit or implicit
attribute to the code generator. So don't use packed data type to
decide what operation to perform. This become relevant while switching
to explicit signed and unsigned data types, where we want to pass the
right type to make this decision in the future
Test: test-art-host test-art-target
Bug: 64091002
Change-Id: I49a8827a13dd703910effcb5a5ebc4b9646cd1e8
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| dbbac8f812a866b1b53f3007721f66038d208549 |
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01-Sep-2017 |
Aart Bik <ajcbik@google.com> |
Implement Sum-of-Abs-Differences idiom recognition.
Rationale:
Currently just on ARM64 (x86 lacks proper support),
using the SAD idiom yields great speedup on loops
that compute the sum-of-abs-difference operation.
Also includes some refinements around type conversions.
Speedup ExoPlayerAudio (golem run):
1.3x on ARM64
1.1x on x86
Test: test-art-host test-art-target
Bug: 64091002
Change-Id: Ia2b711d2bc23609a2ed50493dfe6719eedfe0130
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