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8300584: Accelerate AVX-512 CRC32C for small buffers

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Reviewed-by: kvn, sviswanathan
This commit is contained in:
Scott Gibbons 2023-01-21 00:07:31 +00:00 committed by Sandhya Viswanathan
parent 5784eb7b68
commit 7c2f77a422
1 changed files with 26 additions and 14 deletions
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40
src/hotspot/cpu/x86/stubGenerator_x86_64.cpp
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@ -2760,26 +2760,38 @@ address StubGenerator::generate_updateBytesCRC32C(bool is_pclmulqdq_supported) {
BLOCK_COMMENT("Entry:");
__ enter(); // required for proper stackwalking of RuntimeStub frame
Label L_continue;
if (VM_Version::supports_sse4_1() && VM_Version::supports_avx512_vpclmulqdq() &&
VM_Version::supports_avx512bw() &&
VM_Version::supports_avx512vl()) {
Label L_doSmall;
__ cmpl(len, 384);
__ jcc(Assembler::lessEqual, L_doSmall);
__ lea(j, ExternalAddress(StubRoutines::x86::crc32c_table_avx512_addr()));
__ kernel_crc32_avx512(crc, buf, len, j, l, k);
} else {
#ifdef _WIN64
__ push(y);
__ push(z);
#endif
__ crc32c_ipl_alg2_alt2(crc, buf, len,
a, j, k,
l, y, z,
c_farg0, c_farg1, c_farg2,
is_pclmulqdq_supported);
#ifdef _WIN64
__ pop(z);
__ pop(y);
#endif
__ jmp(L_continue);
__ bind(L_doSmall);
}
#ifdef _WIN64
__ push(y);
__ push(z);
#endif
__ crc32c_ipl_alg2_alt2(crc, buf, len,
a, j, k,
l, y, z,
c_farg0, c_farg1, c_farg2,
is_pclmulqdq_supported);
#ifdef _WIN64
__ pop(z);
__ pop(y);
#endif
__ bind(L_continue);
__ movl(rax, crc);
__ vzeroupper();
__ leave(); // required for proper stackwalking of RuntimeStub frame