< prev index next >
src/cpu/ppc/vm/templateInterpreterGenerator_ppc.cpp
Print this page
rev 12672 : [mq]: crc32_ppc.patch
@@ -1,8 +1,8 @@
/*
* Copyright (c) 2014, 2017, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2015, 2016 SAP SE. All rights reserved.
+ * Copyright (c) 2015, 2017, SAP SE. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
@@ -1893,11 +1893,11 @@
// Being passed from java as an int, the single byte is at offset +3.
#endif
__ lwz(crc, 2*wordSize, argP); // Current crc state, zero extend to 64 bit to have a clean register.
StubRoutines::ppc64::generate_load_crc_table_addr(_masm, table);
- __ kernel_crc32_singleByte(crc, data, dataLen, table, tmp);
+ __ kernel_crc32_singleByte(crc, data, dataLen, table, tmp, true);
// Restore caller sp for c2i case and return.
__ mr(R1_SP, R21_sender_SP); // Cut the stack back to where the caller started.
__ blr();
@@ -1909,10 +1909,14 @@
}
return NULL;
}
+// TODO: generate_CRC32_updateBytes_entry and generate_CRC32C_updateBytes_entry are identical
+// except for using different crc tables and some block comment strings.
+// We should provide a common implementation.
+
// CRC32 Intrinsics.
/**
* Method entry for static native methods:
* int java.util.zip.CRC32.updateBytes( int crc, byte[] b, int off, int len)
* int java.util.zip.CRC32.updateByteBuffer(int crc, long* buf, int off, int len)
@@ -1985,11 +1989,11 @@
StubRoutines::ppc64::generate_load_crc_table_addr(_masm, table);
// Performance measurements show the 1word and 2word variants to be almost equivalent,
// with very light advantages for the 1word variant. We chose the 1word variant for
// code compactness.
- __ kernel_crc32_1word(crc, data, dataLen, table, t0, t1, t2, t3, tc0, tc1, tc2, tc3);
+ __ kernel_crc32_1word(crc, data, dataLen, table, t0, t1, t2, t3, tc0, tc1, tc2, tc3, true);
// Restore caller sp for c2i case and return.
__ mr(R1_SP, R21_sender_SP); // Cut the stack back to where the caller started.
__ blr();
@@ -2001,12 +2005,88 @@
}
return NULL;
}
-// Not supported
+// CRC32C Intrinsics.
+/**
+ * Method entry for static native methods:
+ * int java.util.zip.CRC32C.updateBytes( int crc, byte[] b, int off, int len)
+ * int java.util.zip.CRC32C.updateDirectByteBuffer(int crc, long* buf, int off, int len)
+ **/
address TemplateInterpreterGenerator::generate_CRC32C_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
+ if (UseCRC32CIntrinsics) {
+ address start = __ pc(); // Remember stub start address (is rtn value).
+
+ // We don't generate local frame and don't align stack because
+ // we not even call stub code (we generate the code inline)
+ // and there is no safepoint on this path.
+
+ // Load parameters.
+ // Z_esp is callers operand stack pointer, i.e. it points to the parameters.
+ const Register argP = R15_esp;
+ const Register crc = R3_ARG1; // crc value
+ const Register data = R4_ARG2; // address of java byte array
+ const Register dataLen = R5_ARG3; // source data len
+ const Register table = R6_ARG4; // address of crc32c table
+
+ const Register t0 = R9; // scratch registers for crc calculation
+ const Register t1 = R10;
+ const Register t2 = R11;
+ const Register t3 = R12;
+
+ const Register tc0 = R2; // registers to hold pre-calculated column addresses
+ const Register tc1 = R7;
+ const Register tc2 = R8;
+ const Register tc3 = table; // table address is reconstructed at the end of kernel_crc32_* emitters
+
+ const Register tmp = t0; // Only used very locally to calculate byte buffer address.
+
+ // Arguments are reversed on java expression stack.
+ // Calculate address of start element.
+ if (kind == Interpreter::java_util_zip_CRC32C_updateDirectByteBuffer) { // Used for "updateDirectByteBuffer".
+ BLOCK_COMMENT("CRC32C_updateDirectByteBuffer {");
+ // crc @ (SP + 5W) (32bit)
+ // buf @ (SP + 3W) (64bit ptr to long array)
+ // off @ (SP + 2W) (32bit)
+ // dataLen @ (SP + 1W) (32bit)
+ // data = buf + off
+ __ ld( data, 3*wordSize, argP); // start of byte buffer
+ __ lwa( tmp, 2*wordSize, argP); // byte buffer offset
+ __ lwa( dataLen, 1*wordSize, argP); // #bytes to process
+ __ lwz( crc, 5*wordSize, argP); // current crc state
+ __ add( data, data, tmp); // Add byte buffer offset.
+ } else { // Used for "updateBytes update".
+ BLOCK_COMMENT("CRC32C_updateBytes {");
+ // crc @ (SP + 4W) (32bit)
+ // buf @ (SP + 3W) (64bit ptr to byte array)
+ // off @ (SP + 2W) (32bit)
+ // dataLen @ (SP + 1W) (32bit)
+ // data = buf + off + base_offset
+ __ ld( data, 3*wordSize, argP); // start of byte buffer
+ __ lwa( tmp, 2*wordSize, argP); // byte buffer offset
+ __ lwa( dataLen, 1*wordSize, argP); // #bytes to process
+ __ add( data, data, tmp); // add byte buffer offset
+ __ lwz( crc, 4*wordSize, argP); // current crc state
+ __ addi(data, data, arrayOopDesc::base_offset_in_bytes(T_BYTE));
+ }
+
+ StubRoutines::ppc64::generate_load_crc32c_table_addr(_masm, table);
+
+ // Performance measurements show the 1word and 2word variants to be almost equivalent,
+ // with very light advantages for the 1word variant. We chose the 1word variant for
+ // code compactness.
+ __ kernel_crc32_1word(crc, data, dataLen, table, t0, t1, t2, t3, tc0, tc1, tc2, tc3, false);
+
+ // Restore caller sp for c2i case and return.
+ __ mr(R1_SP, R21_sender_SP); // Cut the stack back to where the caller started.
+ __ blr();
+
+ BLOCK_COMMENT("} CRC32C_update{Bytes|DirectByteBuffer}");
+ return start;
+ }
+
return NULL;
}
// =============================================================================
// Exceptions
< prev index next >