From f16d1837f8f6cf5917acba1605e7598c20e8a65e Mon Sep 17 00:00:00 2001
From: SChernykh <sergey.v.chernykh@gmail.com>
Date: Sun, 29 Nov 2020 14:05:50 +0100
Subject: [PATCH] Optimized JIT compiler
More branch-free code
---
src/crypto/randomx/jit_compiler_x86.cpp | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)
diff --git a/src/crypto/randomx/jit_compiler_x86.cpp b/src/crypto/randomx/jit_compiler_x86.cpp
index 182de1fa6..9753701e8 100644
--- a/src/crypto/randomx/jit_compiler_x86.cpp
+++ b/src/crypto/randomx/jit_compiler_x86.cpp
@@ -495,12 +495,10 @@ namespace randomx {
emit32(instr.getImm32(), code, codePos);
emitByte(0x25, code, codePos);
- if (instr.getModCond() < StoreL3Condition) {
- emit32(AddressMask[instr.getModMem()], code, codePos);
- }
- else {
- emit32(ScratchpadL3Mask, code, codePos);
- }
+
+ const uint32_t mask1 = AddressMask[instr.getModMem()];
+ const uint32_t mask2 = ScratchpadL3Mask;
+ emit32((instr.mod < (StoreL3Condition << 4)) ? mask1 : mask2, code, codePos);
}
FORCE_INLINE void JitCompilerX86::genAddressImm(const Instruction& instr, uint8_t* code, uint32_t& codePos) {