src/cpu/ppc/vm/stubGenerator_ppc.cpp

rev 11916 : 8164920: ppc: enhancement of CRC32 intrinsic

*** 3203,3214 ****
  
      // arguments to kernel_crc32:
      const Register crc     = R3_ARG1;  // Current checksum, preset by caller or result from previous call.
      const Register data    = R4_ARG2;  // source byte array
      const Register dataLen = R5_ARG3;  // #bytes to process
-     const Register table   = R6_ARG4;  // crc table address
  
      const Register t0      = R2;
      const Register t1      = R7;
      const Register t2      = R8;
      const Register t3      = R9;
      const Register tc0     = R10;
--- 3203,3243 ----
  
      // arguments to kernel_crc32:
      const Register crc     = R3_ARG1;  // Current checksum, preset by caller or result from previous call.
      const Register data    = R4_ARG2;  // source byte array
      const Register dataLen = R5_ARG3;  // #bytes to process
  
+     const Register table   = R6;       // crc table address
+ 
+ #ifdef VM_LITTLE_ENDIAN
+     if (VM_Version::has_vpmsumb()) {
+       const Register constants    = R2;  // constants address
+       const Register bconstants   = R8;  // barret table address
+ 
+       const Register t0      = R9;
+       const Register t1      = R10;
+       const Register t2      = R11;
+       const Register t3      = R12;
+       const Register t4      = R7;
+ 
+       BLOCK_COMMENT("Stub body {");
+       assert_different_registers(crc, data, dataLen, table);
+ 
+       StubRoutines::ppc64::generate_load_crc_table_addr(_masm, table);
+       StubRoutines::ppc64::generate_load_crc_constants_addr(_masm, constants);
+       StubRoutines::ppc64::generate_load_crc_barret_constants_addr(_masm, bconstants);
+ 
+       __ kernel_crc32_1word_vpmsumd(crc, data, dataLen, table, constants, bconstants, t0, t1, t2, t3, t4);
+ 
+       BLOCK_COMMENT("return");
+       __ mr_if_needed(R3_RET, crc);      // Updated crc is function result. No copying required (R3_ARG1 == R3_RET).
+       __ blr();
+ 
+       BLOCK_COMMENT("} Stub body");
+     } else
+ #endif
+     {
        const Register t0      = R2;
        const Register t1      = R7;
        const Register t2      = R8;
        const Register t3      = R9;
        const Register tc0     = R10;
*** 3225,3234 ****
--- 3254,3265 ----
        BLOCK_COMMENT("return");
        __ mr_if_needed(R3_RET, crc);      // Updated crc is function result. No copying required (R3_ARG1 == R3_RET).
        __ blr();
  
        BLOCK_COMMENT("} Stub body");
+     }
+ 
      return start;
    }
  
    // Initialization
    void generate_initial() {