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src/hotspot/cpu/ppc/stubGenerator_ppc.cpp
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rev 53302 : 8216060: [PPC64] Vector CRC implementation should be used by interpreter and be faster for short arrays
Reviewed-by: gromero, goetz
@@ -1,8 +1,8 @@
/*
- * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2012, 2018, SAP SE. All rights reserved.
+ * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2019, 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.
@@ -3186,29 +3186,25 @@
return start;
}
// Compute CRC32/CRC32C function.
- void generate_CRC_updateBytes(const char* name, Register table, bool invertCRC) {
+ void generate_CRC_updateBytes(const char* name, Register table, Register vector_constants, bool invertCRC) {
// 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 t0 = R2;
- const Register t1 = R7;
- const Register t2 = R8;
- const Register t3 = R9;
- const Register tc0 = R10;
- const Register tc1 = R11;
- const Register tc2 = R12;
-
BLOCK_COMMENT("Stub body {");
assert_different_registers(crc, data, dataLen, table);
- __ kernel_crc32_1word(crc, data, dataLen, table, t0, t1, t2, t3, tc0, tc1, tc2, table, invertCRC);
+ if (vector_constants == noreg) {
+ __ kernel_crc32_1word(crc, data, dataLen, table, R2, R7, R8, R9, R10, R11, R12, table, invertCRC);
+ } else {
+ __ kernel_crc32_vpmsum(crc, data, dataLen, table, vector_constants, R7, R8, R9, R10, R11, R12, invertCRC);
+ }
BLOCK_COMMENT("return");
__ mr_if_needed(R3_RET, crc); // Updated crc is function result. No copying required (R3_ARG1 == R3_RET).
__ blr();
@@ -3495,46 +3491,24 @@
address generate_CRC32_updateBytes(const char* name) {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", name);
address start = __ function_entry(); // Remember stub start address (is rtn value).
- const Register table = R6; // crc table address
-
// 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
- 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_vpmsum(crc, data, dataLen, table, constants, bconstants, t0, t1, t2, t3, t4, true);
-
- BLOCK_COMMENT("return");
- __ mr_if_needed(R3_RET, crc); // Updated crc is function result. No copying required (R3_ARG1 == R3_RET).
- __ blr();
+ const Register table = R6; // crc table address
+ Register vector_constants = noreg;
- BLOCK_COMMENT("} Stub body");
- } else {
StubRoutines::ppc64::generate_load_crc_table_addr(_masm, table);
- generate_CRC_updateBytes(name, table, true);
+ if (VM_Version::has_vpmsumb()) {
+ vector_constants = R2;
+ StubRoutines::ppc64::generate_load_crc_constants_addr(_masm, vector_constants);
}
-
+ generate_CRC_updateBytes(name, table, vector_constants, true);
return start;
}
/**
@@ -3555,46 +3529,24 @@
address generate_CRC32C_updateBytes(const char* name) {
__ align(CodeEntryAlignment);
StubCodeMark mark(this, "StubRoutines", name);
address start = __ function_entry(); // Remember stub start address (is rtn value).
- const Register table = R6; // crc table address
-
// 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
- 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_crc32c_table_addr(_masm, table);
- StubRoutines::ppc64::generate_load_crc32c_constants_addr(_masm, constants);
- StubRoutines::ppc64::generate_load_crc32c_barret_constants_addr(_masm, bconstants);
-
- __ kernel_crc32_1word_vpmsum(crc, data, dataLen, table, constants, bconstants, t0, t1, t2, t3, t4, false);
-
- BLOCK_COMMENT("return");
- __ mr_if_needed(R3_RET, crc); // Updated crc is function result. No copying required (R3_ARG1 == R3_RET).
- __ blr();
+ const Register table = R6; // crc table address
+ Register vector_constants = noreg;
- BLOCK_COMMENT("} Stub body");
- } else {
StubRoutines::ppc64::generate_load_crc32c_table_addr(_masm, table);
- generate_CRC_updateBytes(name, table, false);
+ if (VM_Version::has_vpmsumb()) {
+ vector_constants = R2;
+ StubRoutines::ppc64::generate_load_crc32c_constants_addr(_masm, vector_constants);
}
-
+ generate_CRC_updateBytes(name, table, vector_constants, false);
return start;
}
// Initialization
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