diff options
Diffstat (limited to 'src/cpu/aarch64/vm/macroAssembler_aarch64.cpp')
| -rw-r--r-- | src/cpu/aarch64/vm/macroAssembler_aarch64.cpp | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/src/cpu/aarch64/vm/macroAssembler_aarch64.cpp b/src/cpu/aarch64/vm/macroAssembler_aarch64.cpp index f7f9cd89c..0b308f2b1 100644 --- a/src/cpu/aarch64/vm/macroAssembler_aarch64.cpp +++ b/src/cpu/aarch64/vm/macroAssembler_aarch64.cpp @@ -2156,6 +2156,57 @@ void MacroAssembler::kernel_crc32(Register crc, Register buf, Register len, unsigned long offset; ornw(crc, zr, crc); + + if (UseCRC32) { + Label CRC_by64_loop, CRC_by4_loop, CRC_by1_loop; + + subs(len, len, 64); + br(Assembler::GE, CRC_by64_loop); + adds(len, len, 64-4); + br(Assembler::GE, CRC_by4_loop); + adds(len, len, 4); + br(Assembler::GT, CRC_by1_loop); + b(L_exit); + + BIND(CRC_by4_loop); + ldrw(tmp, Address(post(buf, 4))); + subs(len, len, 4); + crc32w(crc, crc, tmp); + br(Assembler::GE, CRC_by4_loop); + adds(len, len, 4); + br(Assembler::LE, L_exit); + BIND(CRC_by1_loop); + ldrb(tmp, Address(post(buf, 1))); + subs(len, len, 1); + crc32b(crc, crc, tmp); + br(Assembler::GT, CRC_by1_loop); + b(L_exit); + + align(CodeEntryAlignment); + BIND(CRC_by64_loop); + subs(len, len, 64); + ldp(tmp, tmp3, Address(post(buf, 16))); + crc32x(crc, crc, tmp); + crc32x(crc, crc, tmp3); + ldp(tmp, tmp3, Address(post(buf, 16))); + crc32x(crc, crc, tmp); + crc32x(crc, crc, tmp3); + ldp(tmp, tmp3, Address(post(buf, 16))); + crc32x(crc, crc, tmp); + crc32x(crc, crc, tmp3); + ldp(tmp, tmp3, Address(post(buf, 16))); + crc32x(crc, crc, tmp); + crc32x(crc, crc, tmp3); + br(Assembler::GE, CRC_by64_loop); + adds(len, len, 64-4); + br(Assembler::GE, CRC_by4_loop); + adds(len, len, 4); + br(Assembler::GT, CRC_by1_loop); + BIND(L_exit); + ornw(crc, zr, crc); + return; + } + adrp(table0, ExternalAddress(StubRoutines::crc_table_addr()), offset); if (offset) add(table0, table0, offset); add(table1, table0, 1*256*sizeof(juint)); |