From 44c90c060ad6061e0959267e1bf48aa7e0524dc6 Mon Sep 17 00:00:00 2001
From: Nekotekina <nekotekina@gmail.com>
Date: Mon, 19 Oct 2020 00:43:40 +0300
Subject: [PATCH] TSX: improve transaction repeat handling

Handle status 0 as fatal.
---
 Utilities/JIT.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Utilities/JIT.cpp b/Utilities/JIT.cpp
index 836f737ee2..01e92a7241 100644
--- a/Utilities/JIT.cpp
+++ b/Utilities/JIT.cpp
@@ -285,6 +285,10 @@ asmjit::Label asmjit::build_transaction_enter(asmjit::X86Assembler& c, asmjit::L
 		c.test(x86::eax, _XABORT_EXPLICIT);
 		c.jnz(fallback);
 
+		// Don't repeat on weird zero status
+		c.test(x86::eax, x86::eax);
+		c.jz(fallback);
+
 		// Count an attempt without RETRY flag as 65 normal attempts and continue
 		c.push(x86::rax);
 		c.not_(x86::eax);