Closed
Bug 1755721
Opened 2 years ago
Closed 2 years ago
x64/x86: Improve encoding of SIMD float min/max operations using AVX
Categories
(Core :: JavaScript: WebAssembly, enhancement, P3)
Core
JavaScript: WebAssembly
Tracking
()
RESOLVED
FIXED
99 Branch
| Tracking | Status | |
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| firefox99 | --- | fixed |
People
(Reporter: yury, Assigned: yury)
References
Details
Attachments
(2 files)
Currently our minMaxFloat64x2 and minMaxFloat32x4 methods are too "heavy". They generate about 22 instructions (7 are just regular moves). Some of OR/AND operations make functionality of BLENDV instruction. It is expected to reduce amount of instructions by 50% by using VEX encoding and VBLENDVx
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Assignee | |
Comment 1•2 years ago
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Updated•2 years ago
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Attachment #9264174 -
Attachment description: WIP: Bug 1755721 = Improve SIMD min/max using AVX → WIP: Bug 1755721 - Improve SIMD float min/max using AVX
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Comment 2•2 years ago
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Nice...
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Assignee | |
Comment 3•2 years ago
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Macrobenching of f32x4.min+f32x4.max shows that with AVX improves performance by 25% in generic case (with NaN) and by 19% when input data has no NaNs. The amount of instructions decreased by 53, and gives 100 bytes back.
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Updated•2 years ago
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Attachment #9264174 -
Attachment description: WIP: Bug 1755721 - Improve SIMD float min/max using AVX → Bug 1755721 - Improve SIMD float min/max using AVX
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Updated•2 years ago
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Attachment #9264174 -
Attachment description: Bug 1755721 - Improve SIMD float min/max using AVX → Bug 1755721 - Improve SIMD float min/max using AVX. r=jseward
Pushed by ydelendik@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/c6f1243c3ba4 Improve SIMD float min/max using AVX. r=jseward
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Comment 5•2 years ago
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| bugherder | ||
Status: ASSIGNED → RESOLVED
Closed: 2 years ago
status-firefox99:
--- → fixed
Resolution: --- → FIXED
Target Milestone: --- → 99 Branch
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Description
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