Validate Windows native M FP8 and reduce operand packing cost

scripts/windows/test-native-m-fp8.ps1

@@ -0,0 +1,28 @@
+[CmdletBinding()]
+param([Parameter(Mandatory=$true)][string]$CaptureDirectory,
+    [Parameter(Mandatory=$true)][string]$BaselineValidation,
+    [string]$ModuleDirectory, [string]$HipRoot, [string]$OutputDirectory, [switch]$Benchmark)
+$ErrorActionPreference='Stop'
+$repo=[IO.Path]::GetFullPath((Join-Path $PSScriptRoot '../..'))
+if (!$ModuleDirectory) { $ModuleDirectory=Join-Path $repo 'build/native-m-fp8-experimental' }
+if (!$HipRoot) { $HipRoot=Join-Path $repo '.tools/therock-10.2.0a20260929/_rocm_sdk_core' }
+if (!$OutputDirectory) { $OutputDirectory=Join-Path $repo 'test-results/m-native-fp8-replay' }
+$previousPython=$env:PYTHONPATH
+try {
+    $env:PYTHONPATH="$(Join-Path $repo '.tools/python/vendor');$previousPython"
+    $metadata=Get-Content -LiteralPath (Join-Path $ModuleDirectory 'build-info.json') -Raw | ConvertFrom-Json
+    if ($metadata.hardwarePacking) {
+        & python -u (Join-Path $repo 'tools/windows/fp8_pack_validate.py') `
+            --probe (Join-Path $repo 'dist/windows-rdna4-command-list/bin/d4r_native_replay_probe.exe') `
+            --module (Join-Path $ModuleDirectory 'packing-probe/fp8_pack_probe.hsaco') `
+            --hip-root $HipRoot --output-dir (Join-Path $OutputDirectory 'packing-check')
+        if ($LASTEXITCODE) { throw 'Hardware packing does not preserve every finite FP8 encoding; stopping before network replay.' }
+    }
+    $benchmarkArguments=@()
+    if ($Benchmark) { $benchmarkArguments=@('--benchmark-control-dir',(Join-Path $repo 'build/native-m-gfx1201')) }
+    & python -u (Join-Path $repo 'tools/windows/m_native_replay_compare.py') `
+        --capture-dir $CaptureDirectory --module-dir $ModuleDirectory --hip-root $HipRoot `
+        --probe (Join-Path $repo 'dist/windows-rdna4-command-list/bin/d4r_native_replay_probe.exe') `
+        --baseline-validation $BaselineValidation --output-dir $OutputDirectory @benchmarkArguments
+    if ($LASTEXITCODE) { throw "Experimental FP8 validation failed; baseline unchanged. Logs: $OutputDirectory" }
+} finally { $env:PYTHONPATH=$previousPython }