[WASM] PackedSimd.IsSupported returns false in .NET 8.0.11~9.0.0

[zyl910]

Description

On .NET 8.0.7, the Blazor WASM project has SIMD hardware acceleration. Both Vector128.IsHardwareAccelerated and PackedSimd.IsSupported return true.

.NET was updated to version 8.0.11 after the Visual Studio 2022 upgrade. The SIMD hardware acceleration of the WASM project is not work. Both Vector128.IsHardwareAccelerated and PackedSimd.IsSupported return false.

Changed the target framework of the project to net 9.0, still no SIMD hardware acceleration. Both Vector128.IsHardwareAccelerated and PackedSimd.IsSupported return false.

Tested on Edge, Chrome, and Firefox browsers with the same results.

Log from .NET 8.0.7

RuntimeInformation.FrameworkDescription:	.NET 8.0.7
RuntimeInformation.OSArchitecture:	Wasm
RuntimeInformation.OSDescription:	Browser
RuntimeInformation.RuntimeIdentifier:	browser-wasm
Vector128.IsHardwareAccelerated:	True
PackedSimd.IsSupported:	True

Log from .NET 8.0.11

RuntimeInformation.FrameworkDescription:	.NET 8.0.11
RuntimeInformation.OSArchitecture:	Wasm
RuntimeInformation.OSDescription:	Browser
RuntimeInformation.RuntimeIdentifier:	browser-wasm
Vector128.IsHardwareAccelerated:	False
PackedSimd.IsSupported:	False

Reproduction Steps

From a Standalone Blazor WASM project starting on 8.0.7, compile and run. Then, upgrade to 8.0.11/9.0.0 and try again.

Expected behavior

Vector128.IsHardwareAccelerated = true
PackedSimd.IsSupported = true

Actual behavior

Vector128.IsHardwareAccelerated = false
PackedSimd.IsSupported = false

Regression?

No response

Known Workarounds

No response

Configuration

.NET Version: 8.0.11/9.0.0
OS: Windows 11 24H2 build 26100.2605
Architecture: x64
CPU: AMD Ryzen 7 7840H

Browsers:

• Edge 131
• Chrome 131
• FireFox 2023.6

dotnet --info：

.NET SDK:
 Version:           9.0.101
 Commit:            eedb237549
 Workload version:  9.0.100-manifests.4a280210
 MSBuild version:   17.12.12+1cce77968

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.26100
 OS Platform: Windows
 RID:         win-x64
 Base Path:   C:\Program Files\dotnet\sdk\9.0.101\

.NET workloads installed:
 [wasm-tools-net8]
   Installation Source: VS 17.12.35527.113
   Manifest Version:    9.0.0/9.0.100
   Manifest Path:       C:\Program Files\dotnet\sdk-manifests\9.0.100\microsoft.net.workload.mono.toolchain.net8\9.0.0\WorkloadManifest.json
   Install Type:              Msi

Other information

No response

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