8283598: [vectorapi] Add new vector operation for compress and expand bits

Reviewed-by: psandoz, sviswanathan

Author: Smita Kamath

src/hotspot/share/opto/classes.hpp

@@ -76,6 +76,8 @@ macro(Catch)
 macro(CatchProj)
 macro(CheckCastPP)
 macro(ClearArray)
+macro(CompressBits)
+macro(ExpandBits)
 macro(ConstraintCast)
 macro(CMoveD)
 macro(CMoveVD)

src/hotspot/share/opto/mulnode.hpp

@@ -389,4 +389,20 @@ class MulAddS2INode : public Node {
   virtual uint ideal_reg() const { return Op_RegI; }
 };
 
+//------------------------------CompressBitsNode-------------------------------
+// CompressBits placeholder node
+class CompressBitsNode : public Node {
+public:
+  CompressBitsNode(Node *in1, Node *in2) : Node(0,in1,in2) {}
+  virtual int Opcode() const;
+};
+
+//------------------------------ExpandBitsNode---------------------------------
+// ExpandBits placeholder node
+class ExpandBitsNode : public Node {
+public:
+  ExpandBitsNode(Node *in1, Node *in2) : Node(0,in1,in2) {}
+  virtual int Opcode() const;
+};
+
 #endif // SHARE_OPTO_MULNODE_HPP

src/hotspot/share/opto/vectornode.cpp

@@ -161,6 +161,12 @@ int VectorNode::opcode(int sopc, BasicType bt) {
   case Op_ReverseBytesI:
   case Op_ReverseBytesL:
     return (is_integral_type(bt) ? Op_ReverseBytesV : 0);
+  case Op_CompressBits:
+    // Not implemented. Returning 0 temporarily
+    return 0;
+  case Op_ExpandBits:
+    // Not implemented. Returning 0 temporarily
+    return 0;
   case Op_LShiftI:
     switch (bt) {
     case T_BOOLEAN:

src/hotspot/share/prims/vectorSupport.cpp

@@ -480,7 +480,7 @@ int VectorSupport::vop2ideal(jint id, BasicType bt) {
       break;
     }
     case VECTOR_OP_BIT_COUNT: {
-     switch (bt) {
+      switch (bt) {
         case T_BYTE:  // Returning Op_PopCountI
         case T_SHORT: // for byte and short types temporarily
         case T_INT:   return Op_PopCountI;
@@ -490,7 +490,7 @@ int VectorSupport::vop2ideal(jint id, BasicType bt) {
       break;
     }
     case VECTOR_OP_TZ_COUNT: {
-     switch (bt) {
+      switch (bt) {
         case T_BYTE:
         case T_SHORT:
         case T_INT:   return Op_CountTrailingZerosI;
@@ -500,7 +500,7 @@ int VectorSupport::vop2ideal(jint id, BasicType bt) {
       break;
     }
     case VECTOR_OP_LZ_COUNT: {
-     switch (bt) {
+      switch (bt) {
         case T_BYTE:
         case T_SHORT:
         case T_INT:   return Op_CountLeadingZerosI;
@@ -510,7 +510,7 @@ int VectorSupport::vop2ideal(jint id, BasicType bt) {
       break;
     }
     case VECTOR_OP_REVERSE: {
-     switch (bt) {
+      switch (bt) {
         case T_BYTE:  // Temporarily returning
         case T_SHORT: // Op_ReverseI for byte and short
         case T_INT:   return Op_ReverseI;
@@ -520,7 +520,7 @@ int VectorSupport::vop2ideal(jint id, BasicType bt) {
       break;
     }
     case VECTOR_OP_REVERSE_BYTES: {
-     switch (bt) {
+      switch (bt) {
         case T_BYTE:
         case T_SHORT:
         case T_INT:   return Op_ReverseBytesI;
@@ -529,6 +529,22 @@ int VectorSupport::vop2ideal(jint id, BasicType bt) {
       }
       break;
     }
+    case VECTOR_OP_COMPRESS_BITS: {
+      switch (bt) {
+        case T_INT:
+        case T_LONG: return Op_CompressBits;
+        default: fatal("COMPRESS_BITS: %s", type2name(bt));
+      }
+      break;
+    }
+    case VECTOR_OP_EXPAND_BITS: {
+      switch (bt) {
+        case T_INT:
+        case T_LONG: return Op_ExpandBits;
+        default: fatal("EXPAND_BITS: %s", type2name(bt));
+      }
+      break;
+    }
 
     case VECTOR_OP_TAN:
     case VECTOR_OP_TANH:

src/hotspot/share/prims/vectorSupport.hpp

@@ -98,6 +98,8 @@ class VectorSupport : AllStatic {
     VECTOR_OP_LZ_COUNT = 30,
     VECTOR_OP_REVERSE  = 31,
     VECTOR_OP_REVERSE_BYTES = 32,
+    VECTOR_OP_COMPRESS_BITS = 33,
+    VECTOR_OP_EXPAND_BITS = 34,
 
     // Vector Math Library
     VECTOR_OP_TAN   = 101,

src/java.base/share/classes/jdk/internal/vm/vector/VectorSupport.java

@@ -90,6 +90,10 @@ public class VectorSupport {
     public static final int VECTOR_OP_REVERSE   = 31;
     public static final int VECTOR_OP_REVERSE_BYTES = 32;
 
+    // Compress and Expand Bits operation
+    public static final int VECTOR_OP_COMPRESS_BITS = 33;
+    public static final int VECTOR_OP_EXPAND_BITS = 34;
+
     // Math routines
     public static final int VECTOR_OP_TAN = 101;
     public static final int VECTOR_OP_TANH = 102;