The t6-t8 are scratch registers and should not be allocatable.

Besides, add s0, s1, s2, s5 and s8 as allocatable registers.

Change-Id: I0805cc5273d0e0ec5040a0376bcbfba276202077
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3147315
Commit-Queue: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76739}

No functionality change is expected.

Bug: v8:11217
Change-Id: I131d52794e4de24ec838cc23f15828edbfc656ff
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3131372Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76738}

Merge the SSE and AVX opcodes for I16x8Eq and I16x8GtS. We delegate to
the macro-assembler to check for AVX.

No functionality change is expected.

Bug: v8:11217
Change-Id: I873b261d6f949bfc6755fe4c0e09b964a02c3684
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3131371
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76737}

Change-Id: I8afa821412ae248ddea990755404a9bf5f33184e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3125434Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76736}

Rolling v8/base/trace_event/common: https://chromium.googlesource.com/chromium/src/base/trace_event/common/+log/3da1e2f..715537d

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/fbef918..1e4482b

Rolling v8/third_party/aemu-linux-x64: aSVGWUgGw-Nuh-08X80jtqA2bVKylBoNa1h7D-6Kzf0C..ExffPYjGXL4Gz5i52elIFTU-ZZZ3Rgom_ZGpSi12LBoC

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/d69b31c..7285666

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/195c102..c678081

Rolling v8/tools/luci-go: git_revision:3e1f1f7a109ed8aefc7feba94fa737f0b5b4847e..git_revision:7b62727dc713b47d7a7ce9bca27500cb8e82ebd7

Rolling v8/tools/luci-go: git_revision:3e1f1f7a109ed8aefc7feba94fa737f0b5b4847e..git_revision:7b62727dc713b47d7a7ce9bca27500cb8e82ebd7

Rolling v8/tools/luci-go: git_revision:3e1f1f7a109ed8aefc7feba94fa737f0b5b4847e..git_revision:7b62727dc713b47d7a7ce9bca27500cb8e82ebd7

TBR=v8-waterfall-sheriff@grotations.appspotmail.com,mtv-sf-v8-sheriff@grotations.appspotmail.com

Change-Id: Id805d5bb7032f8208273f5e2aaa0532c7b03fc67
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3149517Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#76735}

This CL takes advantage of the z15 `store byte reverse element`
instructions to optimize Simd StoreLane opcodes.

On the simulator we only run `store element` as reversing is
not required.

Change-Id: I723f6db535799470c46a1e298a9c1af7574ad5b6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3144373Reviewed-by: Junliang Yan <junyan@redhat.com>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/main@{#76734}

Combine the SSE and AVX versions, delegate to the macro-assembler
functions to check for AVX support.

Change Pand, Por, Pxor to generate the *ps version of the instruction
when AVX is not supported. The *ps versions are 1 byte shorter, and have
no performance difference on SSE-only processors.

Bug: v8:11589
Bug: v8:11217
Change-Id: I9d51054359dcc909efcbb2c3d3bb63d399cd6721
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3124101Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76733}

Do not require that dst == src1, this leaves more flexibility for the
operands. We check in the macro-assembler if dst alias any of the input
operands, then use vfma231/vfma132/vfma213 appropriately.

Bug: v8:11659
Change-Id: I3644f5e0e75bd047d4e5f5b52d4234e54d329d15
Fixed: v8:11659
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3131370
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76732}

Bug: v8:12191
Change-Id: I867e81a62341f9c95cf56466b9d97a877d9debdf
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3145990Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Francis McCabe <fgm@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76731}

globals are no longer LE enforced after https://crrev.com/c/2944437.
LANE is used instead to pick the correct lane on BE machines.

Change-Id: I106bebda2633a4673ad4b5165c0440cc445d9475
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3148036Reviewed-by: Zhi An Ng <zhin@chromium.org>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/main@{#76730}

In addition to inputs consisting entirely of random bits, the
bigint test shell now also generates inputs that are powers of
two (i.e. have many 0-bits) and inputs with many 1-bits.
Empirically, these kinds of inputs are more likely to flush out
corner case bugs.

Bug: v8:11515
Change-Id: Ib69f12bf215055991b028196dc54ebbc00780bae
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3055292
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76729}

R=clemensb@chromium.org

Bug: v8:8091
Change-Id: I99546c99de2283c1169b299b5ae3cd89298a8a95
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3148134Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76728}

No multiplications needed, just putting bits directly into
the right places.

Bug: v8:11515
Change-Id: I65e5658bb5ed12caec9325f414563526f8edbbf3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3055291
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76727}

This adds some basic tests for WebAssembly code protection, in four
different configurations:
- no protection
- mprotect-based protection
- PKU-based protection
- PKU with fallback to mprotect

If PKU is not supported by the OS or hardware, then PKU is identical to
no protection, and PKU with fallback is identical to mprotect. We always
execute all four configurations anyway.
If protection is effective, we expect code to be writable within a
{CodeSpaceWriteScope}, and not writable otherwise. When trying to write
to non-writable code, we expect a crash of the process (checked via
{ASSERT_DEATH_IF_SUPPORTED}).

R=jkummerow@chromium.org
CC=​mpdenton@chromium.org

Bug: v8:11974
Cq-Include-Trybots: luci.v8.try:v8_mac_arm64_rel_ng
Cq-Include-Trybots: luci.v8.try:v8_mac_arm64_dbg_ng
Change-Id: I4ec0ce9426f70ff41a292b9ea25be1e8956a670e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3138210
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76726}

This is a port of the following 2 CL on Chromium:
https://crrev.com/c/3139927
https://crrev.com/c/2672580

Bug: gn:252
Change-Id: I7c0636fad9d9f07c73e5f77b9b0a342d0326800f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3145613Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/main@{#76725}

Bug: chromium:1233780
Change-Id: I92d097e04702f9db88113584c1d3e5e940d0f1ab
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3147317
Commit-Queue: Yoshisato Yanagisawa <yyanagisawa@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Auto-Submit: Yoshisato Yanagisawa <yyanagisawa@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76724}

Also bump the minimum size determined by manually testing with:
mjsunit/harmony/modules-import-13

Bug: v8:12197
Change-Id: Ic21d42547ba14cd927d158388ad4bc6f1891f45c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3147453
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76723}

Fixed: v8:12192
Change-Id: Ifcb006bd1746e7bcf3b16c0e31e8cda9c920483c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3147590
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76722}

We should use pc relative branch instruction rather than loading
target address from memory for better performance.

Besides, just like arm64, currently we assume that none of our
relocation types are pc relative pointing outside the code buffer
nor pc absolute pointing inside the code buffer.

Change-Id: I9cce2e79c0afb00af967638405469f65df1deda2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3147314Reviewed-by: Liu yu <liuyu@loongson.cn>
Commit-Queue: Liu yu <liuyu@loongson.cn>
Cr-Commit-Position: refs/heads/main@{#76721}

Bug: v8:8091, chromium:1247119
Change-Id: Icafd0bf9277aed835032396c2512e7d991407e0d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3144910Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76720}

These tests require a certain stack-size as otherwise range errors show
up in the test expectations, which are compared verbatim.

Bug: v8:12197
Change-Id: I0e420fe6b03965241003ac69fd7d96fa61682c1d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3147592
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76719}

We add an option to BuildTFGraph to not emit stack checks and call
tracing and use it in inlined functions.
Also, we add tests for zero/multiple return values, as well as infinite
loops in the inlined function.

Bug: v8:12166
Change-Id: I5f34c57d9870592085804853ff23ba94897cc8d5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3141589Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76718}

Change-Id: Ic917bf0e6a3d5f6624f77c72cb9d16626d6508fa
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3145418
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Patrick Thier <pthier@chromium.org>
Reviewed-by: Patrick Thier <pthier@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76717}

Rolling v8/third_party/google_benchmark/src: https://chromium.googlesource.com/external/github.com/google/benchmark/+log/4f80705..c23a001

Remove unused parameter from lambda. (#1223) (Dominic Hamon)
https://chromium.googlesource.com/external/github.com/google/benchmark/+/c23a001

add  to final releasing step (Dominic Hamon)
https://chromium.googlesource.com/external/github.com/google/benchmark/+/92f50a2

bump version to 1.6 in preparation for release (Dominic Hamon)
https://chromium.googlesource.com/external/github.com/google/benchmark/+/f91b6b4

TBR=v8-waterfall-sheriff@grotations.appspotmail.com,mtv-sf-v8-sheriff@grotations.appspotmail.com,mlippautz@chromium.org

Change-Id: I69c037d549e7d2887962e6d7cfa3ba87d990fe2b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3146793Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#76716}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/03a089b..fbef918

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/d579cbc..d69b31c

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/749fd8e..195c102

TBR=v8-waterfall-sheriff@grotations.appspotmail.com,mtv-sf-v8-sheriff@grotations.appspotmail.com

Change-Id: I08604eaa678dda32dda55016fcbb2a71183d1387
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3145268Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#76715}

I'm one of the v8 maintainers of mips, and I request to add
myself to MIPS_OWNERS.

Change-Id: If246f44e54497619d9d58929131e3d2d1dfc9c5b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3141031
Auto-Submit: Liu yu <liuyu@loongson.cn>
Reviewed-by: Lutz Vahl <vahl@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Liu yu <liuyu@loongson.cn>
Cr-Commit-Position: refs/heads/main@{#76714}

Bug: v8:11879
Change-Id: I02cfb6ca7cff418dc3e4ab422a1bc3437f0ea778
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3146075Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76713}

This is a reland of 65515ddd

Fix is to use AddWithWraparound for signed additions to avoid UB.

Original change's description:
> [wasm-simd][arm64] Fuse add and extmul
>
> We can select a better instruction for add+extmul, using one of the
> multiply-long-accumulate instruction.
>
> Define a helper struct to pattern match Add(x, OP(y, z)) and
> Add(OP(x, y) z), and ensure that the matched OP is always on the
> LHS, to simplify checking for matches.
>
> Bug: v8:11548
> Change-Id: I7ab488b262aa9f749785f973549ccd9fad72f4c8
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2826725
> Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
> Commit-Queue: Zhi An Ng <zhin@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#76708}

Bug: v8:11548
Change-Id: I675ab8b78d9c6c30b82a8c96c8e7098a548c6a60
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3144379
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76712}

A previous change (see ref) added a subset of 256-bit instructions to
the x64 assembler--this change adds a disassembly test for the added
instructions.

ref: https://chromium-review.googlesource.com/c/v8/v8/+/3123648
Change-Id: Ia56be7a7df636b8bf6c04f044912e914d949d19f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3133956
Auto-Submit: Andrew Brown <andrew.brown@intel.com>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Reviewed-by: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76711}

https://chromium.googlesource.com/external/github.com/tc39/test262/+log/45a913c0..50f3fca

Bug: v8:7834, v8:12167, v8:12168, v8:11544
Change-Id: I1cebc0a82cced63fbf9ec46111825f22ac01eeeb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3142539Reviewed-by: Shu-yu Guo <syg@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76710}

This reverts commit 65515ddd.

Reason for revert: https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux64%20UBSan/18117/overview

Original change's description:
> [wasm-simd][arm64] Fuse add and extmul
>
> We can select a better instruction for add+extmul, using one of the
> multiply-long-accumulate instruction.
>
> Define a helper struct to pattern match Add(x, OP(y, z)) and
> Add(OP(x, y) z), and ensure that the matched OP is always on the
> LHS, to simplify checking for matches.
>
> Bug: v8:11548
> Change-Id: I7ab488b262aa9f749785f973549ccd9fad72f4c8
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2826725
> Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
> Commit-Queue: Zhi An Ng <zhin@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#76708}

Bug: v8:11548
Change-Id: Ic1560616e7ee6df917fcedbb6ad139a1a9773d68
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3144377
Auto-Submit: Zhi An Ng <zhin@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#76709}

We can select a better instruction for add+extmul, using one of the
multiply-long-accumulate instruction.

Define a helper struct to pattern match Add(x, OP(y, z)) and
Add(OP(x, y) z), and ensure that the matched OP is always on the
LHS, to simplify checking for matches.

Bug: v8:11548
Change-Id: I7ab488b262aa9f749785f973549ccd9fad72f4c8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2826725Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76708}

On MacOS, `ps -e | grep foo` always finds a match, because `ps`
already sees the `grep` command, which matches the search string.
Luckily, `pgrep` exists as an elegant alternative.

No-Try: true
Change-Id: Ieedfe62ab11a59fb9a29ae1ebd39b164eec5193c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3144917
Auto-Submit: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76707}

Bug: v8:12094
Change-Id: Ibefce881cbfcd4445485197a4a2615bdf0599ada
Fixed: v8:12094
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3123638
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76706}

Change-Id: Iefd76cdf793578acf46717d99c8896c7df7e1970
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3145179Reviewed-by: Junliang Yan <junyan@redhat.com>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/main@{#76705}

Change-Id: Id37868f94a9ccebdee0530e9eb450c4acfa2f7c8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3145414Reviewed-by: Milad Fa <mfarazma@redhat.com>
Commit-Queue: Junliang Yan <junyan@redhat.com>
Cr-Commit-Position: refs/heads/main@{#76704}

Simply putting all features behind --experimental-wasm-gc.
The intent is to simplify command lines.

Bug: v8:7748
Change-Id: Ibfaa4dc720087a490b177a2b95841620a4d25d89
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3141583
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Auto-Submit: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76703}

Change-Id: Ie614bf368d6cf955cb1a7537ef81aafd6925ccbb
No-Tree-Checks: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3144149
Auto-Submit: Deepti Gandluri <gdeepti@chromium.org>
Reviewed-by: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76702}

That makes it easier to try various values.

Change-Id: I3f4784d148cd5c7524773972e72e1a37ce861210
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2972731
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76701}

 - Add vsetivli/I8x16Add/vl/vse8
 - In Rvv, Vector regs is different from Float Regs. But in this cl, in order to facilitate modification, it is assumed that the vector register and float register share a set of register codes.
 - Because v0 is mask reg, we can't allocate it . And transfer float into vector reg, so i delete ft0 from AllocateReg.

Bug: v8:11976
Change-Id: I66185d1f5ead985489bcbdf671b131f02a6bd7c2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3005768
Commit-Queue: Ji Qiu <qiuji@iscas.ac.cn>
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Reviewed-by: Ji Qiu <qiuji@iscas.ac.cn>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76700}