Expose the ConvertToIntegerNative APIs (dotnet#100993)

* Expose the ConvertToIntegerNative APIs for the floating-point types

* Accelerate the ConvertToInteger and related APIs

* Applying formatting patch

* Fixing some tests for x86 and skipping some tests on Mono

Author: tannergooding

src/coreclr/jit/compiler.h

@@ -3188,13 +3188,17 @@ class Compiler
                                  CorInfoType simdBaseJitType,
                                  unsigned    simdSize);
 
-#if defined(TARGET_XARCH)
-    GenTree* gtNewSimdCvtNode(var_types              type,
-                              GenTree*               op1,
-                              CorInfoType            simdTargetBaseJitType,
-                              CorInfoType            simdSourceBaseJitType,
-                              unsigned               simdSize);
-#endif //TARGET_XARCH
+    GenTree* gtNewSimdCvtNode(var_types   type,
+                              GenTree*    op1,
+                              CorInfoType simdTargetBaseJitType,
+                              CorInfoType simdSourceBaseJitType,
+                              unsigned    simdSize);
+
+    GenTree* gtNewSimdCvtNativeNode(var_types   type,
+                                    GenTree*    op1,
+                                    CorInfoType simdTargetBaseJitType,
+                                    CorInfoType simdSourceBaseJitType,
+                                    unsigned    simdSize);
 
     GenTree* gtNewSimdCreateBroadcastNode(
         var_types type, GenTree* op1, CorInfoType simdBaseJitType, unsigned simdSize);
@@ -5928,7 +5932,7 @@ class Compiler
     void fgReplaceEhfSuccessor(BasicBlock* block, BasicBlock* oldSucc, BasicBlock* newSucc);
 
     void fgRemoveEhfSuccessor(BasicBlock* block, const unsigned succIndex);
-    
+
     void fgRemoveEhfSuccessor(FlowEdge* succEdge);
 
     void fgReplaceJumpTarget(BasicBlock* block, BasicBlock* oldTarget, BasicBlock* newTarget);

src/coreclr/jit/emit.h

@@ -4020,6 +4020,8 @@ emitAttr emitter::emitGetBaseMemOpSize(instrDesc* id) const
         case INS_subss:
         case INS_ucomiss:
         case INS_vbroadcastss:
+        case INS_vcvttss2usi32:
+        case INS_vcvttss2usi64:
         case INS_vfmadd132ss:
         case INS_vfmadd213ss:
         case INS_vfmadd231ss:
@@ -4067,6 +4069,8 @@ emitAttr emitter::emitGetBaseMemOpSize(instrDesc* id) const
         case INS_subsd:
         case INS_ucomisd:
         case INS_vbroadcastsd:
+        case INS_vcvttsd2usi32:
+        case INS_vcvttsd2usi64:
         case INS_vfmadd132sd:
         case INS_vfmadd213sd:
         case INS_vfmadd231sd: