System.Numerics.Tests.Perf_VectorConvert.Convert_ulong_double has regressed a lot on x86 #66832
Description
System.Numerics.Tests.Perf_VectorConvert.Convert_ulong_double has regressed x25 on x86, but improved for x64.
Repro:
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 net7.0 --filter System.Numerics.Tests.Perf_VectorConvert.Convert_ulong_double --architecture x86Details
| Result | Base | Diff | Ratio | Operating System | Bit |
|---|---|---|---|---|---|
| Faster | 1617.02 | 574.60 | 2.81 | Windows 11 | X64 |
| Faster | 890.92 | 410.82 | 2.17 | Windows 11 | X64 |
| Faster | 3121.80 | 1263.22 | 2.47 | Windows 11 | X64 |
| Faster | 1445.69 | 725.92 | 1.99 | Windows 10 | X64 |
| Faster | 2120.73 | 809.30 | 2.62 | Windows 11 | X64 |
| Faster | 2465.62 | 1009.49 | 2.44 | Windows 11 | X64 |
| Faster | 953.99 | 423.17 | 2.25 | ubuntu 18.04 | X64 |
| Faster | 966.86 | 425.70 | 2.27 | ubuntu 20.04 | X64 |
| Faster | 2308.55 | 965.59 | 2.39 | ubuntu 18.04 | X64 |
| Faster | 2771.01 | 1333.80 | 2.08 | ubuntu 18.04 | X64 |
| Faster | 2147.64 | 991.60 | 2.17 | pop 20.04 | X64 |
| Faster | 1263.20 | 736.57 | 1.71 | alpine 3.13 | X64 |
| Faster | 1259.47 | 730.80 | 1.72 | debian 11 | X64 |
| Same | 585.29 | 579.48 | 1.01 | macOS Monterey 12.2.1 | Arm64 |
| Same | 676.53 | 676.12 | 1.00 | Windows 10 | Arm64 |
| Same | 678.29 | 678.43 | 1.00 | Windows 11 | Arm64 |
| Slower | 3176.11 | 43751.84 | 0.07 | Windows 10 | X86 |
| Slower | 1597.47 | 32929.64 | 0.05 | Windows 10 | X86 |
| Slower | 1446.79 | 33592.24 | 0.04 | Windows 10 | X86 |
| Faster | 53217.69 | 34251.08 | 1.55 | Windows 10 | Arm |
| Faster | 2875.52 | 1047.20 | 2.75 | macOS Big Sur 11.6.3 | X64 |
| Faster | 2455.51 | 887.62 | 2.77 | macOS Monterey 12.2.1 | X64 |
| Faster | 2373.55 | 984.52 | 2.41 | macOS Monterey 12.2.1 | X64 |
Most likely related to #65189