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8307555: Reduce memory reads in x86 MD5 intrinsic

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Reviewed-by: simonis, phh
This commit is contained in:
Yi-Fan Tsai 2023-05-15 18:41:53 +00:00 committed by Paul Hohensee
parent 01892f9c6e
commit 43c8c650af
1 changed files with 11 additions and 10 deletions
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21
src/hotspot/cpu/x86/macroAssembler_x86_md5.cpp
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@ -52,19 +52,16 @@
// int com.sun.security.provider.MD5.implCompress0(byte[] b, int ofs)
void MacroAssembler::fast_md5(Register buf, Address state, Address ofs, Address limit, bool multi_block) {
Label start, done_hash, loop0;
Label done_hash, loop0;
bind(start);
bind(loop0);
// Save hash values for addition after rounds
movptr(rdi, state);
movl(rax, Address(rdi, 0));
movl(rbx, Address(rdi, 4));
movl(rcx, Address(rdi, 8));
movl(rdx, Address(rdi, 12));
bind(loop0);
#define FF(r1, r2, r3, r4, k, s, t) \
addl(r1, t); \
movl(rsi, r3); \
@ -189,10 +186,14 @@ void MacroAssembler::fast_md5(Register buf, Address state, Address ofs, Address
// write hash values back in the correct order
movptr(rdi, state);
addl(Address(rdi, 0), rax);
addl(Address(rdi, 4), rbx);
addl(Address(rdi, 8), rcx);
addl(Address(rdi, 12), rdx);
addl(rax, Address(rdi, 0));
movl(Address(rdi, 0), rax);
addl(rbx, Address(rdi, 4));
movl(Address(rdi, 4), rbx);
addl(rcx, Address(rdi, 8));
movl(Address(rdi, 8), rcx);
addl(rdx, Address(rdi, 12));
movl(Address(rdi, 12), rdx);
if (multi_block) {
// increment data pointer and loop if more to process