Ассемблерные вставки теперь и в Java

A user has to provide (1) machine code snippet; and (2) method type:

    MethodHandle jdk.internal.panama.CodeSnippet.make(
	String     name,
	MethodType type,
	boolean    isSupported,
	int...     code)

256-bit memory-to-memory move with double-register addressing mode:

   MethodHandle mov256MH = CodeSnippet.make("move256",
     MethodType.methodType(void.class,            // return type
                           Object.class /*rdi*/,  // src
                           long.class   /*rsi*/,  // offset
                           Object.class /*rdx*/,  // dst
                           long.class   /*rcx*/), // offset
     CPUID.has(AVX),
     0xC4, 0xE1, 0x7E, 0x6F, 0x04, 0x37,  // vmovdqu ymm0,[rsi+rdi]
     0xC4, 0xE1, 0x7E, 0x7F, 0x04, 0x0A); // vmovdqu [rdx+rcx],ymm0


   static void move256(Object src, long off1, Object dst, long off2) {
       try {
           mov256MH.invokeExact(src, off1, dst, off2);
       } catch (Throwable e) {
           throw new Error(e);
       }
   }

   byte[] src = ...; long off1 = ...;
   byte[] dst = ...; long off2 = ...;
   move256(src, off1, dst, off2);