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Optimized dataset read for Ryzen CPUs

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Removed register dependency in dataset read, +0.8% speedup on average.
This commit is contained in:
SChernykh 2019-12-08 16:14:02 +01:00
parent 4dec063472
commit d0df824599
17 changed files with 81 additions and 20 deletions
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19
src/crypto/randomx/asm/program_read_dataset_ryzen.inc Normal file
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mov rcx, rbp ;# ecx = ma
shr rcx, 32
and ecx, RANDOMX_DATASET_BASE_MASK
xor rbp, rax ;# modify "mx"
mov rax, qword ptr [rdi+rcx]
mov edx, ebp ;# edx = mx
and edx, RANDOMX_DATASET_BASE_MASK
prefetchnta byte ptr [rdi+rdx]
ror rbp, 32 ;# swap "ma" and "mx"
add rcx, rdi ;# dataset cache line
xor r8, rax
xor r9, qword ptr [rcx+8]
xor r10, qword ptr [rcx+16]
xor r11, qword ptr [rcx+24]
xor r12, qword ptr [rcx+32]
xor r13, qword ptr [rcx+40]
xor r14, qword ptr [rcx+48]
xor r15, qword ptr [rcx+56]