I expect PackSources0 and PackSources1 to have exactly the same codegen in the following code snippet:
static Vector128<byte> PackSources1(Vector128<ushort> lower, Vector128<ushort> upper)
=> Vector128.NarrowWithSaturation(lower, upper);
static Vector128<byte> PackSources0(Vector128<ushort> lower, Vector128<ushort> upper)
=> Sse2.PackUnsignedSaturate(
Vector128.Min(lower, Vector128.Create((ushort)255)).AsInt16(),
Vector128.Min(upper, Vector128.Create((ushort)255)).AsInt16());// coreclr trunk-20250611+5415b7342d44af9c974905760539f198fad13682
C:PackSources1(System.Runtime.Intrinsics.Vector128`1[ushort],System.Runtime.Intrinsics.Vector128`1[ushort]):System.Runtime.Intrinsics.Vector128`1[byte] (FullOpts):
vbroadcastss xmm0, dword ptr [reloc @RWD00]
vpminuw xmm1, xmm0, xmmword ptr [rsp+0x08]
vpand xmm1, xmm1, xmm0
vpminuw xmm2, xmm0, xmmword ptr [rsp+0x18]
vpand xmm0, xmm2, xmm0
vpackuswb xmm0, xmm1, xmm0
vmovups xmmword ptr [rdi], xmm0
mov rax, rdi
ret
RWD00 dd 00FF00FFh ; 2.34184e-38
C:PackSources0(System.Runtime.Intrinsics.Vector128`1[ushort],System.Runtime.Intrinsics.Vector128`1[ushort]):System.Runtime.Intrinsics.Vector128`1[byte] (FullOpts):
vbroadcastss xmm0, dword ptr [reloc @RWD00]
vpminuw xmm1, xmm0, xmmword ptr [rsp+0x08]
vpminuw xmm0, xmm0, xmmword ptr [rsp+0x18]
vpackuswb xmm0, xmm1, xmm0
vmovups xmmword ptr [rdi], xmm0
mov rax, rdi
ret
RWD00 dd 00FF00FFh ; 2.34184e-38https://csharp.godbolt.org/z/o39G8GP9T
Related: #115525
cc: @tannergooding
I expect
PackSources0andPackSources1to have exactly the same codegen in the following code snippet:https://csharp.godbolt.org/z/o39G8GP9T
Related: #115525
cc: @tannergooding