[.NET 7]Integer auto-vectorization bug #83387

Closed
#92333
Closed
[.NET 7]Integer auto-vectorization bug#83387
#92333
Assignees
jakobbotsch
Labels
area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMIbug
Milestone
8.0.0

Description

@koszeggy
koszeggy
opened on Mar 14, 2023

Description

The detailed description is here.

Summary: On some platforms uint/int vector initialization is wrong from ushort fields or arrays. Vector<T> and Vector128<T> are affected for sure, maybe others as well.

Reproduction Steps

usingSystem;usingSystem.Numerics;usingSystem.Runtime.Intrinsics;(ushortA,ushortR,ushortG,ushortB)c=(32768,65535,32768,16384);Vector128<uint>v1=Vector128.Create(c.R,c.G,c.B,0u);Console.WriteLine(v1);v1=v1*c.A/Vector128.Create(0xFFFFu);Console.WriteLine(v1);Span<uint>span=stackallocuint[Vector<uint>.Count];span[0]=c.R;span[1]=c.G;span[2]=c.B;Vector<uint>v2=newVector<uint>(span)*c.A/newVector<uint>(0xFFFF);Console.WriteLine(v2);Console.WriteLine();Console.WriteLine(Vector128.Create((int)c.A));Console.WriteLine(Vector128.Create((int)32768));Console.WriteLine(Vector128.Create((int)c.A,(int)c.A,(int)c.A,(int)c.A));

Please note that the results are correct in SharpLab Release mode but are incorrect in Debug mode.

Expected behavior

The expected output (works in SharpLab Release mode):

<65535, 32768, 16384, 0>
<32768, 16384, 8192, 0>
<32768, 16384, 8192, 0, 0, 0, 0, 0>
<32768, 32768, 32768, 32768>
<32768, 32768, 32768, 32768>
<32768, 32768, 32768, 32768>

Actual behavior

Incorrect output (eg. in SharpLab Debug mode, .NET Fiddle or on my computer both in Release and Debug builds):

<65535, 32768, 16384, 0>
<32769, 49152, 57344, 0>
<32769, 49152, 57344, 0, 0, 0, 0, 0>
<-32768, -32768, -32768, -32768>
<32768, 32768, 32768, 32768>
<32768, 32768, 32768, 32768>

Regression?

In .NET Fiddle the .NET 6 platform appears to be working; however, some of the used overloaded operators were not available in .NET 6 so I'm not sure what it actually executes.

Known Workarounds

Vanilla operations, explicit usage of HW intrinsics, copying the ushort field into an uint first.

Configuration

.NET 7.0.200
Intel i5-8300H
Windows 11 (Version 10.0.22621.1265)

Other information

No response

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    Skip to content
    [.NET 7]Integer auto-vectorization bug #83387
    Closed
    #92333
    Closed
    [.NET 7]Integer auto-vectorization bug#83387
    #92333
    Assignees
    jakobbotsch
    Labels
    area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMIbug
    Milestone
    8.0.0
    Description
    @koszeggy
    koszeggy
    opened on Mar 14, 2023
    Description
    The detailed description is here.
    Summary: On some platforms uint/int vector initialization is wrong from ushort fields or arrays. Vector<T> and Vector128<T> are affected for sure, maybe others as well.
    Reproduction Steps
    usingSystem;usingSystem.Numerics;usingSystem.Runtime.Intrinsics;(ushortA,ushortR,ushortG,ushortB)c=(32768,65535,32768,16384);Vector128<uint>v1=Vector128.Create(c.R,c.G,c.B,0u);Console.WriteLine(v1);v1=v1*c.A/Vector128.Create(0xFFFFu);Console.WriteLine(v1);Span<uint>span=stackallocuint[Vector<uint>.Count];span[0]=c.R;span[1]=c.G;span[2]=c.B;Vector<uint>v2=newVector<uint>(span)*c.A/newVector<uint>(0xFFFF);Console.WriteLine(v2);Console.WriteLine();Console.WriteLine(Vector128.Create((int)c.A));Console.WriteLine(Vector128.Create((int)32768));Console.WriteLine(Vector128.Create((int)c.A,(int)c.A,(int)c.A,(int)c.A));
    Please note that the results are correct in SharpLab Release mode but are incorrect in Debug mode.
    Expected behavior
    The expected output (works in SharpLab Release mode):
    <65535, 32768, 16384, 0>
<32768, 16384, 8192, 0>
<32768, 16384, 8192, 0, 0, 0, 0, 0>
<32768, 32768, 32768, 32768>
<32768, 32768, 32768, 32768>
<32768, 32768, 32768, 32768>

    Actual behavior
    Incorrect output (eg. in SharpLab Debug mode, .NET Fiddle or on my computer both in Release and Debug builds):
    <65535, 32768, 16384, 0>
<32769, 49152, 57344, 0>
<32769, 49152, 57344, 0, 0, 0, 0, 0>
<-32768, -32768, -32768, -32768>
<32768, 32768, 32768, 32768>
<32768, 32768, 32768, 32768>

    Regression?
    In .NET Fiddle the .NET 6 platform appears to be working; however, some of the used overloaded operators were not available in .NET 6 so I'm not sure what it actually executes.
    Known Workarounds
    Vanilla operations, explicit usage of HW intrinsics, copying the ushort field into an uint first.
    Configuration
    .NET 7.0.200
    
Intel i5-8300H
    
Windows 11 (Version 10.0.22621.1265)
    Other information
    No response
    Metadata
    Metadata
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    Labels
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      Skip to content
      [.NET 7]Integer auto-vectorization bug #83387
      Closed
      #92333
      Closed
      [.NET 7]Integer auto-vectorization bug#83387
      #92333
      Assignees
      jakobbotsch
      Labels
      area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMIbug
      Milestone
      8.0.0
      Description
      @koszeggy
      koszeggy
      opened on Mar 14, 2023
      Description
      The detailed description is here.
      Summary: On some platforms uint/int vector initialization is wrong from ushort fields or arrays. Vector<T> and Vector128<T> are affected for sure, maybe others as well.
      Reproduction Steps
      usingSystem;usingSystem.Numerics;usingSystem.Runtime.Intrinsics;(ushortA,ushortR,ushortG,ushortB)c=(32768,65535,32768,16384);Vector128<uint>v1=Vector128.Create(c.R,c.G,c.B,0u);Console.WriteLine(v1);v1=v1*c.A/Vector128.Create(0xFFFFu);Console.WriteLine(v1);Span<uint>span=stackallocuint[Vector<uint>.Count];span[0]=c.R;span[1]=c.G;span[2]=c.B;Vector<uint>v2=newVector<uint>(span)*c.A/newVector<uint>(0xFFFF);Console.WriteLine(v2);Console.WriteLine();Console.WriteLine(Vector128.Create((int)c.A));Console.WriteLine(Vector128.Create((int)32768));Console.WriteLine(Vector128.Create((int)c.A,(int)c.A,(int)c.A,(int)c.A));
      Please note that the results are correct in SharpLab Release mode but are incorrect in Debug mode.
      Expected behavior
      The expected output (works in SharpLab Release mode):
      <65535, 32768, 16384, 0>
<32768, 16384, 8192, 0>
<32768, 16384, 8192, 0, 0, 0, 0, 0>
<32768, 32768, 32768, 32768>
<32768, 32768, 32768, 32768>
<32768, 32768, 32768, 32768>

      Actual behavior
      Incorrect output (eg. in SharpLab Debug mode, .NET Fiddle or on my computer both in Release and Debug builds):
      <65535, 32768, 16384, 0>
<32769, 49152, 57344, 0>
<32769, 49152, 57344, 0, 0, 0, 0, 0>
<-32768, -32768, -32768, -32768>
<32768, 32768, 32768, 32768>
<32768, 32768, 32768, 32768>

      Regression?
      In .NET Fiddle the .NET 6 platform appears to be working; however, some of the used overloaded operators were not available in .NET 6 so I'm not sure what it actually executes.
      Known Workarounds
      Vanilla operations, explicit usage of HW intrinsics, copying the ushort field into an uint first.
      Configuration
      .NET 7.0.200
      
Intel i5-8300H
      
Windows 11 (Version 10.0.22621.1265)
      Other information
      No response
      Metadata
      Metadata
      Assignees
      Labels
      area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMIbug
      Type
      No type
      Projects
      No projects
        Milestone
        Relationships
        None yet
        Development
        No branches or pull requests
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var __m = "*";
var __re = new RegExp('^' + ".*" + '

        Skip to content
        [.NET 7]Integer auto-vectorization bug #83387
        Closed
        #92333
        Closed
        [.NET 7]Integer auto-vectorization bug#83387
        #92333
        Assignees
        jakobbotsch
        Labels
        area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMIbug
        Milestone
        8.0.0
        Description
        @koszeggy
        koszeggy
        opened on Mar 14, 2023
        Description
        The detailed description is here.
        Summary: On some platforms uint/int vector initialization is wrong from ushort fields or arrays. Vector<T> and Vector128<T> are affected for sure, maybe others as well.
        Reproduction Steps
        usingSystem;usingSystem.Numerics;usingSystem.Runtime.Intrinsics;(ushortA,ushortR,ushortG,ushortB)c=(32768,65535,32768,16384);Vector128<uint>v1=Vector128.Create(c.R,c.G,c.B,0u);Console.WriteLine(v1);v1=v1*c.A/Vector128.Create(0xFFFFu);Console.WriteLine(v1);Span<uint>span=stackallocuint[Vector<uint>.Count];span[0]=c.R;span[1]=c.G;span[2]=c.B;Vector<uint>v2=newVector<uint>(span)*c.A/newVector<uint>(0xFFFF);Console.WriteLine(v2);Console.WriteLine();Console.WriteLine(Vector128.Create((int)c.A));Console.WriteLine(Vector128.Create((int)32768));Console.WriteLine(Vector128.Create((int)c.A,(int)c.A,(int)c.A,(int)c.A));
        Please note that the results are correct in SharpLab Release mode but are incorrect in Debug mode.
        Expected behavior
        The expected output (works in SharpLab Release mode):
        <65535, 32768, 16384, 0>
<32768, 16384, 8192, 0>
<32768, 16384, 8192, 0, 0, 0, 0, 0>
<32768, 32768, 32768, 32768>
<32768, 32768, 32768, 32768>
<32768, 32768, 32768, 32768>

        Actual behavior
        Incorrect output (eg. in SharpLab Debug mode, .NET Fiddle or on my computer both in Release and Debug builds):
        <65535, 32768, 16384, 0>
<32769, 49152, 57344, 0>
<32769, 49152, 57344, 0, 0, 0, 0, 0>
<-32768, -32768, -32768, -32768>
<32768, 32768, 32768, 32768>
<32768, 32768, 32768, 32768>

        Regression?
        In .NET Fiddle the .NET 6 platform appears to be working; however, some of the used overloaded operators were not available in .NET 6 so I'm not sure what it actually executes.
        Known Workarounds
        Vanilla operations, explicit usage of HW intrinsics, copying the ushort field into an uint first.
        Configuration
        .NET 7.0.200
        
Intel i5-8300H
        
Windows 11 (Version 10.0.22621.1265)
        Other information
        No response
        Metadata
        Metadata
        Assignees
        Labels
        area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMIbug
        Type
        No type
        Projects
        No projects
          Milestone
          Relationships
          None yet
          Development
          No branches or pull requests
          Issue actions
          
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})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

          Skip to content
          [.NET 7]Integer auto-vectorization bug #83387
          Closed
          #92333
          Closed
          [.NET 7]Integer auto-vectorization bug#83387
          #92333
          Assignees
          jakobbotsch
          Labels
          area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMIbug
          Milestone
          8.0.0
          Description
          @koszeggy
          koszeggy
          opened on Mar 14, 2023
          Description
          The detailed description is here.
          Summary: On some platforms uint/int vector initialization is wrong from ushort fields or arrays. Vector<T> and Vector128<T> are affected for sure, maybe others as well.
          Reproduction Steps
          usingSystem;usingSystem.Numerics;usingSystem.Runtime.Intrinsics;(ushortA,ushortR,ushortG,ushortB)c=(32768,65535,32768,16384);Vector128<uint>v1=Vector128.Create(c.R,c.G,c.B,0u);Console.WriteLine(v1);v1=v1*c.A/Vector128.Create(0xFFFFu);Console.WriteLine(v1);Span<uint>span=stackallocuint[Vector<uint>.Count];span[0]=c.R;span[1]=c.G;span[2]=c.B;Vector<uint>v2=newVector<uint>(span)*c.A/newVector<uint>(0xFFFF);Console.WriteLine(v2);Console.WriteLine();Console.WriteLine(Vector128.Create((int)c.A));Console.WriteLine(Vector128.Create((int)32768));Console.WriteLine(Vector128.Create((int)c.A,(int)c.A,(int)c.A,(int)c.A));
          Please note that the results are correct in SharpLab Release mode but are incorrect in Debug mode.
          Expected behavior
          The expected output (works in SharpLab Release mode):
          <65535, 32768, 16384, 0>
<32768, 16384, 8192, 0>
<32768, 16384, 8192, 0, 0, 0, 0, 0>
<32768, 32768, 32768, 32768>
<32768, 32768, 32768, 32768>
<32768, 32768, 32768, 32768>

          Actual behavior
          Incorrect output (eg. in SharpLab Debug mode, .NET Fiddle or on my computer both in Release and Debug builds):
          <65535, 32768, 16384, 0>
<32769, 49152, 57344, 0>
<32769, 49152, 57344, 0, 0, 0, 0, 0>
<-32768, -32768, -32768, -32768>
<32768, 32768, 32768, 32768>
<32768, 32768, 32768, 32768>

          Regression?
          In .NET Fiddle the .NET 6 platform appears to be working; however, some of the used overloaded operators were not available in .NET 6 so I'm not sure what it actually executes.
          Known Workarounds
          Vanilla operations, explicit usage of HW intrinsics, copying the ushort field into an uint first.
          Configuration
          .NET 7.0.200
          
Intel i5-8300H
          
Windows 11 (Version 10.0.22621.1265)
          Other information
          No response
          Metadata
          Metadata
          Assignees
          Labels
          area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMIbug
          Type
          No type
          Projects
          No projects
            Milestone
            Relationships
            None yet
            Development
            No branches or pull requests
            Issue actions
            
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(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

            Skip to content
            [.NET 7]Integer auto-vectorization bug #83387
            Closed
            #92333
            Closed
            [.NET 7]Integer auto-vectorization bug#83387
            #92333
            Assignees
            jakobbotsch
            Labels
            area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMIbug
            Milestone
            8.0.0
            Description
            @koszeggy
            koszeggy
            opened on Mar 14, 2023
            Description
            The detailed description is here.
            Summary: On some platforms uint/int vector initialization is wrong from ushort fields or arrays. Vector<T> and Vector128<T> are affected for sure, maybe others as well.
            Reproduction Steps
            usingSystem;usingSystem.Numerics;usingSystem.Runtime.Intrinsics;(ushortA,ushortR,ushortG,ushortB)c=(32768,65535,32768,16384);Vector128<uint>v1=Vector128.Create(c.R,c.G,c.B,0u);Console.WriteLine(v1);v1=v1*c.A/Vector128.Create(0xFFFFu);Console.WriteLine(v1);Span<uint>span=stackallocuint[Vector<uint>.Count];span[0]=c.R;span[1]=c.G;span[2]=c.B;Vector<uint>v2=newVector<uint>(span)*c.A/newVector<uint>(0xFFFF);Console.WriteLine(v2);Console.WriteLine();Console.WriteLine(Vector128.Create((int)c.A));Console.WriteLine(Vector128.Create((int)32768));Console.WriteLine(Vector128.Create((int)c.A,(int)c.A,(int)c.A,(int)c.A));
            Please note that the results are correct in SharpLab Release mode but are incorrect in Debug mode.
            Expected behavior
            The expected output (works in SharpLab Release mode):
            <65535, 32768, 16384, 0>
<32768, 16384, 8192, 0>
<32768, 16384, 8192, 0, 0, 0, 0, 0>
<32768, 32768, 32768, 32768>
<32768, 32768, 32768, 32768>
<32768, 32768, 32768, 32768>

            Actual behavior
            Incorrect output (eg. in SharpLab Debug mode, .NET Fiddle or on my computer both in Release and Debug builds):
            <65535, 32768, 16384, 0>
<32769, 49152, 57344, 0>
<32769, 49152, 57344, 0, 0, 0, 0, 0>
<-32768, -32768, -32768, -32768>
<32768, 32768, 32768, 32768>
<32768, 32768, 32768, 32768>

            Regression?
            In .NET Fiddle the .NET 6 platform appears to be working; however, some of the used overloaded operators were not available in .NET 6 so I'm not sure what it actually executes.
            Known Workarounds
            Vanilla operations, explicit usage of HW intrinsics, copying the ushort field into an uint first.
            Configuration
            .NET 7.0.200
            
Intel i5-8300H
            
Windows 11 (Version 10.0.22621.1265)
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if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
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function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
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              Skip to content
              [.NET 7]Integer auto-vectorization bug #83387
              Closed
              #92333
              Closed
              [.NET 7]Integer auto-vectorization bug#83387
              #92333
              Assignees
              jakobbotsch
              Labels
              area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMIbug
              Milestone
              8.0.0
              Description
              @koszeggy
              koszeggy
              opened on Mar 14, 2023
              Description
              The detailed description is here.
              Summary: On some platforms uint/int vector initialization is wrong from ushort fields or arrays. Vector<T> and Vector128<T> are affected for sure, maybe others as well.
              Reproduction Steps
              usingSystem;usingSystem.Numerics;usingSystem.Runtime.Intrinsics;(ushortA,ushortR,ushortG,ushortB)c=(32768,65535,32768,16384);Vector128<uint>v1=Vector128.Create(c.R,c.G,c.B,0u);Console.WriteLine(v1);v1=v1*c.A/Vector128.Create(0xFFFFu);Console.WriteLine(v1);Span<uint>span=stackallocuint[Vector<uint>.Count];span[0]=c.R;span[1]=c.G;span[2]=c.B;Vector<uint>v2=newVector<uint>(span)*c.A/newVector<uint>(0xFFFF);Console.WriteLine(v2);Console.WriteLine();Console.WriteLine(Vector128.Create((int)c.A));Console.WriteLine(Vector128.Create((int)32768));Console.WriteLine(Vector128.Create((int)c.A,(int)c.A,(int)c.A,(int)c.A));
              Please note that the results are correct in SharpLab Release mode but are incorrect in Debug mode.
              Expected behavior
              The expected output (works in SharpLab Release mode):
              <65535, 32768, 16384, 0>
<32768, 16384, 8192, 0>
<32768, 16384, 8192, 0, 0, 0, 0, 0>
<32768, 32768, 32768, 32768>
<32768, 32768, 32768, 32768>
<32768, 32768, 32768, 32768>

              Actual behavior
              Incorrect output (eg. in SharpLab Debug mode, .NET Fiddle or on my computer both in Release and Debug builds):
              <65535, 32768, 16384, 0>
<32769, 49152, 57344, 0>
<32769, 49152, 57344, 0, 0, 0, 0, 0>
<-32768, -32768, -32768, -32768>
<32768, 32768, 32768, 32768>
<32768, 32768, 32768, 32768>

              Regression?
              In .NET Fiddle the .NET 6 platform appears to be working; however, some of the used overloaded operators were not available in .NET 6 so I'm not sure what it actually executes.
              Known Workarounds
              Vanilla operations, explicit usage of HW intrinsics, copying the ushort field into an uint first.
              Configuration
              .NET 7.0.200
              
Intel i5-8300H
              
Windows 11 (Version 10.0.22621.1265)
              Other information
              No response
              Metadata
              Metadata
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              Labels
              area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMIbug
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if (!enabled) return;
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var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
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var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
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document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

                Skip to content
                [.NET 7]Integer auto-vectorization bug #83387
                Closed
                #92333
                Closed
                [.NET 7]Integer auto-vectorization bug#83387
                #92333
                Assignees
                jakobbotsch
                Labels
                area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMIbug
                Milestone
                8.0.0
                Description
                @koszeggy
                koszeggy
                opened on Mar 14, 2023
                Description
                The detailed description is here.
                Summary: On some platforms uint/int vector initialization is wrong from ushort fields or arrays. Vector<T> and Vector128<T> are affected for sure, maybe others as well.
                Reproduction Steps
                usingSystem;usingSystem.Numerics;usingSystem.Runtime.Intrinsics;(ushortA,ushortR,ushortG,ushortB)c=(32768,65535,32768,16384);Vector128<uint>v1=Vector128.Create(c.R,c.G,c.B,0u);Console.WriteLine(v1);v1=v1*c.A/Vector128.Create(0xFFFFu);Console.WriteLine(v1);Span<uint>span=stackallocuint[Vector<uint>.Count];span[0]=c.R;span[1]=c.G;span[2]=c.B;Vector<uint>v2=newVector<uint>(span)*c.A/newVector<uint>(0xFFFF);Console.WriteLine(v2);Console.WriteLine();Console.WriteLine(Vector128.Create((int)c.A));Console.WriteLine(Vector128.Create((int)32768));Console.WriteLine(Vector128.Create((int)c.A,(int)c.A,(int)c.A,(int)c.A));
                Please note that the results are correct in SharpLab Release mode but are incorrect in Debug mode.
                Expected behavior
                The expected output (works in SharpLab Release mode):
                <65535, 32768, 16384, 0>
<32768, 16384, 8192, 0>
<32768, 16384, 8192, 0, 0, 0, 0, 0>
<32768, 32768, 32768, 32768>
<32768, 32768, 32768, 32768>
<32768, 32768, 32768, 32768>

                Actual behavior
                Incorrect output (eg. in SharpLab Debug mode, .NET Fiddle or on my computer both in Release and Debug builds):
                <65535, 32768, 16384, 0>
<32769, 49152, 57344, 0>
<32769, 49152, 57344, 0, 0, 0, 0, 0>
<-32768, -32768, -32768, -32768>
<32768, 32768, 32768, 32768>
<32768, 32768, 32768, 32768>

                Regression?
                In .NET Fiddle the .NET 6 platform appears to be working; however, some of the used overloaded operators were not available in .NET 6 so I'm not sure what it actually executes.
                Known Workarounds
                Vanilla operations, explicit usage of HW intrinsics, copying the ushort field into an uint first.
                Configuration
                .NET 7.0.200
                
Intel i5-8300H
                
Windows 11 (Version 10.0.22621.1265)
                Other information
                No response
                Metadata
                Metadata
                Assignees
                Labels
                area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMIbug
                Type
                No type
                Projects
                No projects
                  Milestone
                  Relationships
                  None yet
                  Development
                  No branches or pull requests
                  Issue actions