https://www.graalvm.org/ 
public class org.graalvm.compiler.asm.amd64.AMD64Assembler$VexRROp extends org.graalvm.compiler.asm.amd64.AMD64Assembler$VexOp
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.graalvm.compiler.asm.amd64.AMD64Assembler$VexRROp
  super_class: org.graalvm.compiler.asm.amd64.AMD64Assembler$VexOp
{
  public static final org.graalvm.compiler.asm.amd64.AMD64Assembler$VexRROp VMASKMOVDQU;
    descriptor: Lorg/graalvm/compiler/asm/amd64/AMD64Assembler$VexRROp;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  static final boolean $assertionsDisabled;
    descriptor: Z
    flags: (0x1018) ACC_STATIC, ACC_FINAL, ACC_SYNTHETIC

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=10, locals=0, args_size=0
         0: .line 1130
            ldc Lorg/graalvm/compiler/asm/amd64/AMD64Assembler;
            invokevirtual java.lang.Class.desiredAssertionStatus:()Z
            ifne 1
            iconst_1
            goto 2
      StackMap locals:
      StackMap stack:
         1: iconst_0
      StackMap locals:
      StackMap stack: int
         2: putstatic org.graalvm.compiler.asm.amd64.AMD64Assembler$VexRROp.$assertionsDisabled:Z
         3: .line 1132
            new org.graalvm.compiler.asm.amd64.AMD64Assembler$VexRROp
            dup
            ldc "VMASKMOVDQU"
            iconst_1
            iconst_1
            iconst_0
            sipush 247
            getstatic org.graalvm.compiler.asm.amd64.AMD64Assembler$VEXOpAssertion.AVX1_128ONLY:Lorg/graalvm/compiler/asm/amd64/AMD64Assembler$VEXOpAssertion;
            getstatic org.graalvm.compiler.asm.amd64.AMD64BaseAssembler$EVEXTuple.INVALID:Lorg/graalvm/compiler/asm/amd64/AMD64BaseAssembler$EVEXTuple;
            iconst_0
            invokespecial org.graalvm.compiler.asm.amd64.AMD64Assembler$VexRROp.<init>:(Ljava/lang/String;IIIILorg/graalvm/compiler/asm/amd64/AMD64Assembler$VEXOpAssertion;Lorg/graalvm/compiler/asm/amd64/AMD64BaseAssembler$EVEXTuple;I)V
            putstatic org.graalvm.compiler.asm.amd64.AMD64Assembler$VexRROp.VMASKMOVDQU:Lorg/graalvm/compiler/asm/amd64/AMD64Assembler$VexRROp;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  protected void <init>(java.lang.String, int, int, int, int, org.graalvm.compiler.asm.amd64.AMD64Assembler$VEXOpAssertion, org.graalvm.compiler.asm.amd64.AMD64BaseAssembler$EVEXTuple, int);
    descriptor: (Ljava/lang/String;IIIILorg/graalvm/compiler/asm/amd64/AMD64Assembler$VEXOpAssertion;Lorg/graalvm/compiler/asm/amd64/AMD64BaseAssembler$EVEXTuple;I)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=9, locals=9, args_size=9
        start local 0 // org.graalvm.compiler.asm.amd64.AMD64Assembler$VexRROp this
        start local 1 // java.lang.String opcode
        start local 2 // int pp
        start local 3 // int mmmmm
        start local 4 // int w
        start local 5 // int op
        start local 6 // org.graalvm.compiler.asm.amd64.AMD64Assembler$VEXOpAssertion assertion
        start local 7 // org.graalvm.compiler.asm.amd64.AMD64BaseAssembler$EVEXTuple evexTuple
        start local 8 // int wEvex
         0: .line 1136
            aload 0 /* this */
            aload 1 /* opcode */
            iload 2 /* pp */
            iload 3 /* mmmmm */
            iload 4 /* w */
            iload 5 /* op */
            aload 6 /* assertion */
            aload 7 /* evexTuple */
            iload 8 /* wEvex */
            invokespecial org.graalvm.compiler.asm.amd64.AMD64Assembler$VexOp.<init>:(Ljava/lang/String;IIIILorg/graalvm/compiler/asm/amd64/AMD64Assembler$VEXOpAssertion;Lorg/graalvm/compiler/asm/amd64/AMD64BaseAssembler$EVEXTuple;I)V
         1: .line 1137
            return
        end local 8 // int wEvex
        end local 7 // org.graalvm.compiler.asm.amd64.AMD64BaseAssembler$EVEXTuple evexTuple
        end local 6 // org.graalvm.compiler.asm.amd64.AMD64Assembler$VEXOpAssertion assertion
        end local 5 // int op
        end local 4 // int w
        end local 3 // int mmmmm
        end local 2 // int pp
        end local 1 // java.lang.String opcode
        end local 0 // org.graalvm.compiler.asm.amd64.AMD64Assembler$VexRROp this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    2     0       this  Lorg/graalvm/compiler/asm/amd64/AMD64Assembler$VexRROp;
            0    2     1     opcode  Ljava/lang/String;
            0    2     2         pp  I
            0    2     3      mmmmm  I
            0    2     4          w  I
            0    2     5         op  I
            0    2     6  assertion  Lorg/graalvm/compiler/asm/amd64/AMD64Assembler$VEXOpAssertion;
            0    2     7  evexTuple  Lorg/graalvm/compiler/asm/amd64/AMD64BaseAssembler$EVEXTuple;
            0    2     8      wEvex  I
    MethodParameters:
           Name  Flags
      opcode     
      pp         
      mmmmm      
      w          
      op         
      assertion  
      evexTuple  
      wEvex      

  public void emit(org.graalvm.compiler.asm.amd64.AMD64Assembler, org.graalvm.compiler.asm.amd64.AVXKind$AVXSize, jdk.vm.ci.code.Register, jdk.vm.ci.code.Register);
    descriptor: (Lorg/graalvm/compiler/asm/amd64/AMD64Assembler;Lorg/graalvm/compiler/asm/amd64/AVXKind$AVXSize;Ljdk/vm/ci/code/Register;Ljdk/vm/ci/code/Register;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=10, locals=5, args_size=5
        start local 0 // org.graalvm.compiler.asm.amd64.AMD64Assembler$VexRROp this
        start local 1 // org.graalvm.compiler.asm.amd64.AMD64Assembler asm
        start local 2 // org.graalvm.compiler.asm.amd64.AVXKind$AVXSize size
        start local 3 // jdk.vm.ci.code.Register dst
        start local 4 // jdk.vm.ci.code.Register src
         0: .line 1140
            getstatic org.graalvm.compiler.asm.amd64.AMD64Assembler$VexRROp.$assertionsDisabled:Z
            ifne 1
            aload 0 /* this */
            getfield org.graalvm.compiler.asm.amd64.AMD64Assembler$VexRROp.assertion:Lorg/graalvm/compiler/asm/amd64/AMD64Assembler$VEXOpAssertion;
            aload 1 /* asm */
            getfield org.graalvm.compiler.asm.amd64.AMD64Assembler.target:Ljdk/vm/ci/code/TargetDescription;
            getfield jdk.vm.ci.code.TargetDescription.arch:Ljdk/vm/ci/code/Architecture;
            checkcast jdk.vm.ci.amd64.AMD64
            aload 2 /* size */
            aload 3 /* dst */
            aconst_null
            aload 4 /* src */
            invokevirtual org.graalvm.compiler.asm.amd64.AMD64Assembler$VEXOpAssertion.check:(Ljdk/vm/ci/amd64/AMD64;Lorg/graalvm/compiler/asm/amd64/AVXKind$AVXSize;Ljdk/vm/ci/code/Register;Ljdk/vm/ci/code/Register;Ljdk/vm/ci/code/Register;)Z
            ifne 1
            new java.lang.AssertionError
            dup
            invokespecial java.lang.AssertionError.<init>:()V
            athrow
         1: .line 1141
      StackMap locals:
      StackMap stack:
            getstatic org.graalvm.compiler.asm.amd64.AMD64Assembler$VexRROp.$assertionsDisabled:Z
            ifne 2
            aload 0 /* this */
            getfield org.graalvm.compiler.asm.amd64.AMD64Assembler$VexRROp.op:I
            bipush 26
            if_icmpne 2
            aload 0 /* this */
            getfield org.graalvm.compiler.asm.amd64.AMD64Assembler$VexRROp.op:I
            bipush 90
            if_icmpne 2
            new java.lang.AssertionError
            dup
            invokespecial java.lang.AssertionError.<init>:()V
            athrow
         2: .line 1142
      StackMap locals:
      StackMap stack:
            aload 1 /* asm */
            aload 3 /* dst */
            getstatic jdk.vm.ci.code.Register.None:Ljdk/vm/ci/code/Register;
            aload 4 /* src */
            aload 2 /* size */
            aload 0 /* this */
            getfield org.graalvm.compiler.asm.amd64.AMD64Assembler$VexRROp.pp:I
            aload 0 /* this */
            getfield org.graalvm.compiler.asm.amd64.AMD64Assembler$VexRROp.mmmmm:I
            aload 0 /* this */
            getfield org.graalvm.compiler.asm.amd64.AMD64Assembler$VexRROp.w:I
            aload 0 /* this */
            getfield org.graalvm.compiler.asm.amd64.AMD64Assembler$VexRROp.wEvex:I
            iconst_0
            invokevirtual org.graalvm.compiler.asm.amd64.AMD64Assembler.vexPrefix:(Ljdk/vm/ci/code/Register;Ljdk/vm/ci/code/Register;Ljdk/vm/ci/code/Register;Lorg/graalvm/compiler/asm/amd64/AVXKind$AVXSize;IIIIZ)Z
            pop
         3: .line 1143
            aload 1 /* asm */
            aload 0 /* this */
            getfield org.graalvm.compiler.asm.amd64.AMD64Assembler$VexRROp.op:I
            invokevirtual org.graalvm.compiler.asm.amd64.AMD64Assembler.emitByte:(I)V
         4: .line 1144
            aload 1 /* asm */
            aload 3 /* dst */
            aload 4 /* src */
            invokevirtual org.graalvm.compiler.asm.amd64.AMD64Assembler.emitModRM:(Ljdk/vm/ci/code/Register;Ljdk/vm/ci/code/Register;)V
         5: .line 1145
            return
        end local 4 // jdk.vm.ci.code.Register src
        end local 3 // jdk.vm.ci.code.Register dst
        end local 2 // org.graalvm.compiler.asm.amd64.AVXKind$AVXSize size
        end local 1 // org.graalvm.compiler.asm.amd64.AMD64Assembler asm
        end local 0 // org.graalvm.compiler.asm.amd64.AMD64Assembler$VexRROp this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    6     0  this  Lorg/graalvm/compiler/asm/amd64/AMD64Assembler$VexRROp;
            0    6     1   asm  Lorg/graalvm/compiler/asm/amd64/AMD64Assembler;
            0    6     2  size  Lorg/graalvm/compiler/asm/amd64/AVXKind$AVXSize;
            0    6     3   dst  Ljdk/vm/ci/code/Register;
            0    6     4   src  Ljdk/vm/ci/code/Register;
    MethodParameters:
      Name  Flags
      asm   
      size  
      dst   
      src   
}
SourceFile: "AMD64Assembler.java"
NestHost: org.graalvm.compiler.asm.amd64.AMD64Assembler
InnerClasses:
  private final VEXOpAssertion = org.graalvm.compiler.asm.amd64.AMD64Assembler$VEXOpAssertion of org.graalvm.compiler.asm.amd64.AMD64Assembler
  public VexOp = org.graalvm.compiler.asm.amd64.AMD64Assembler$VexOp of org.graalvm.compiler.asm.amd64.AMD64Assembler
  public VexRROp = org.graalvm.compiler.asm.amd64.AMD64Assembler$VexRROp of org.graalvm.compiler.asm.amd64.AMD64Assembler
  protected final EVEXTuple = org.graalvm.compiler.asm.amd64.AMD64BaseAssembler$EVEXTuple of org.graalvm.compiler.asm.amd64.AMD64BaseAssembler
  public final AVXSize = org.graalvm.compiler.asm.amd64.AVXKind$AVXSize of org.graalvm.compiler.asm.amd64.AVXKind