Revert "Revert "[RISC-V] Added designated output instruction emitters (dotnet#96741)""

This reverts commit ecc044d.

Author: Bajtazar

src/coreclr/jit/emit.cpp

@@ -707,7 +707,7 @@ void emitLclVarAddr::initLclVarAddr(int varNum, unsigned offset)
 }
 
 // Returns the variable to access. Note that it returns a negative number for compiler spill temps.
-int emitLclVarAddr::lvaVarNum()
+int emitLclVarAddr::lvaVarNum() const
 {
     switch (_lvaTag)
     {
@@ -721,7 +721,7 @@ int emitLclVarAddr::lvaVarNum()
     }
 }
 
-unsigned emitLclVarAddr::lvaOffset() // returns the offset into the variable to access
+unsigned emitLclVarAddr::lvaOffset() const // returns the offset into the variable to access
 {
     switch (_lvaTag)
     {
@@ -9777,7 +9777,7 @@ void emitter::emitRemoveLastInstruction()
  *  emitGetInsSC: Get the instruction's constant value.
  */
 
-cnsval_ssize_t emitter::emitGetInsSC(instrDesc* id)
+cnsval_ssize_t emitter::emitGetInsSC(const instrDesc* id) const
 {
 #ifdef TARGET_ARM // should it be TARGET_ARMARCH? Why do we need this? Note that on ARM64 we store scaled immediates
                   // for some formats

src/coreclr/jit/emit.h

@@ -418,8 +418,9 @@ struct emitLclVarAddr
     // Constructor
     void initLclVarAddr(int varNum, unsigned offset);
 
-    int lvaVarNum(); // Returns the variable to access. Note that it returns a negative number for compiler spill temps.
-    unsigned lvaOffset(); // returns the offset into the variable to access
+    int lvaVarNum() const; // Returns the variable to access. Note that it returns a negative number for compiler spill
+                           // temps.
+    unsigned lvaOffset() const; // returns the offset into the variable to access
 
     // This struct should be 32 bits in size for the release build.
     // We have this constraint because this type is used in a union
@@ -2225,7 +2226,7 @@ class emitter
     static const IS_INFO emitGetSchedInfo(insFormat f);
 #endif // TARGET_XARCH
 
-    cnsval_ssize_t emitGetInsSC(instrDesc* id);
+    cnsval_ssize_t emitGetInsSC(const instrDesc* id) const;
     unsigned emitInsCount;
 
     /************************************************************************/