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RandomX: added BMI2 version for scratchpad prefetch

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Saves 1 instruction and 1 byte in the main loop.
This commit is contained in:
SChernykh
2021-05-19 17:52:16 +02:00
parent 3ac8f6b23a
commit d443dd86f1
6 changed files with 38 additions and 13 deletions
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9
src/crypto/randomx/jit_compiler_x86_static.asm
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@@ -29,6 +29,7 @@ IFDEF RAX
_RANDOMX_JITX86_STATIC SEGMENT PAGE READ EXECUTE
PUBLIC randomx_prefetch_scratchpad
PUBLIC randomx_prefetch_scratchpad_bmi2
PUBLIC randomx_prefetch_scratchpad_end
PUBLIC randomx_program_prologue
PUBLIC randomx_program_prologue_first_load
@@ -70,6 +71,14 @@ randomx_prefetch_scratchpad PROC
prefetcht0 [rsi+rdx]
randomx_prefetch_scratchpad ENDP
randomx_prefetch_scratchpad_bmi2 PROC
rorx rdx, rax, 32
and eax, RANDOMX_SCRATCHPAD_MASK
prefetcht0 [rsi+rax]
and edx, RANDOMX_SCRATCHPAD_MASK
prefetcht0 [rsi+rdx]
randomx_prefetch_scratchpad_bmi2 ENDP
randomx_prefetch_scratchpad_end PROC
randomx_prefetch_scratchpad_end ENDP