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Replace i8x16/i16x8/i32x4.any_true with v128.any_true #423
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This proposal was voted on and accepted in the 1/8/2021 meeting. |
dtig
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Jan 11, 2021
proposals/simd/NewOpcodes.md
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| @@ -82,7 +82,6 @@ | |||
| | -------------------- | ------ | ------------------------ | ------ | ------------------------ | ------ | ------------- | ------ | | |||
| | i8x16.abs | 0x60 | i16x8.abs | 0x80 | i32x4.abs | 0xa0 | ---- | 0xc0 | | |||
| | i8x16.neg | 0x61 | i16x8.neg | 0x81 | i32x4.neg | 0xa1 | i64x2.neg | 0xc1 | | |||
| | i8x16.any_true | 0x62 | i16x8.any_true | 0x82 | i32x4.any_true | 0xa2 | ---- | 0xc2 | | |||
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For consistency with the rest of this document, perhaps leave in "----" for the operations being removed instead of deleting?
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dtig
approved these changes
Jan 12, 2021
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This wasn't captured in the meetings notes: i recall us saying we can use i8x16.any_true's opcode for this. Don't we want that? Or do we prefer to group it together with the other v128 logical ops? |
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My memory is the same as @ngzhian's. |
jlb6740
reviewed
Jan 15, 2021
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| | ------------- | 0x62 | ------------- | 0x82 | ------------- | 0xa2 | ------------- | 0xc2 | | ||
| | i8x16.all_true | 0x63 | i16x8.all_true | 0x83 | i32x4.all_true | 0xa3 | ------------- | 0xc3 | |
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@Maratyszcza Hi, I understand the removal of the type specific any_true but should the v128.any_true be associated with an opcode somewhere in this file?
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The opcodes is TBD. IIUC, the plan is to assign opcodes for newly added instructions once the instruction set is finalized.
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#421 tracks TBD opcodes.
luyahan
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Jan 26, 2021
In WebAssembly/simd#423, all any_true instructions were removed, and replaced with a single v128.any_true. This patch removes all but v8x16.any_true, and renames it to v128.any_true. Bug: v8:11331 Change-Id: Ie394ec841a1a1c4030c4f589eac2cee8a6a2a1f9 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2639033 Reviewed-by: Georg Neis <neis@chromium.org> Reviewed-by: Deepti Gandluri <gdeepti@chromium.org> Commit-Queue: Zhi An Ng <zhin@chromium.org> Cr-Commit-Position: refs/heads/master@{#72304}
pull bot
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Jan 26, 2021
This reverts commit 9c09c22. Reason for revert: gc stress failures https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux%20-%20arm64%20-%20sim%20-%20gc%20stress/20563/overview Original change's description: > [wasm-simd] Merge all any_true to v128.any_true > > In WebAssembly/simd#423, all any_true > instructions were removed, and replaced with a single v128.any_true. > > This patch removes all but v8x16.any_true, and renames it to > v128.any_true. > > Bug: v8:11331 > Change-Id: Ie394ec841a1a1c4030c4f589eac2cee8a6a2a1f9 > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2639033 > Reviewed-by: Georg Neis <neis@chromium.org> > Reviewed-by: Deepti Gandluri <gdeepti@chromium.org> > Commit-Queue: Zhi An Ng <zhin@chromium.org> > Cr-Commit-Position: refs/heads/master@{#72304} TBR=neis@chromium.org,gdeepti@chromium.org,neis@google.com,zhin@chromium.org Change-Id: I52dbf8de679059dd7b17908c1fe3ada0eb54ff84 No-Presubmit: true No-Tree-Checks: true No-Try: true Bug: v8:11331 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2649240 Reviewed-by: Zhi An Ng <zhin@chromium.org> Commit-Queue: Zhi An Ng <zhin@chromium.org> Cr-Commit-Position: refs/heads/master@{#72305}
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This patch implements the proposal #416 to make
any_trueinstruction untyped as semantically its operation is independent of lane types.