From 64ad80e6d95871f17be4cd01da15581f41ac0b2b Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Mon, 27 May 2019 21:10:34 -0700
Subject: [PATCH] riscv: Disable atomic operations

Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
 js/src/jit/AtomicOperations.h | 2 ++
 1 file changed, 2 insertions(+)

--- a/js/src/jit/AtomicOperations.h
+++ b/js/src/jit/AtomicOperations.h
@@ -393,6 +393,8 @@ inline bool AtomicOperations::isLockfree
 #include "jit/none/AtomicOperations-feeling-lucky.h"
 #elif defined(__s390__) || defined(__s390x__)
 #include "jit/none/AtomicOperations-feeling-lucky.h"
+#elif defined(__riscv)
+#include "jit/none/AtomicOperations-feeling-lucky.h"
 #else
 #error "No AtomicOperations support provided for this platform"
 #endif
--- a/js/src/jit/none/AtomicOperations-feeling-lucky.h
+++ b/js/src/jit/none/AtomicOperations-feeling-lucky.h
@@ -80,6 +80,14 @@
 #define GNUC_COMPATIBLE
 #endif
 
+#ifdef __riscv
+#define GNUC_COMPATIBLE
+#ifdef __riscv_xlen == 64
+#define HAS_64BIT_ATOMICS
+#define HAS_64BIT_LOCKFREE
+#endif
+#endif
+
 // The default implementation tactic for gcc/clang is to use the newer
 // __atomic intrinsics added for use in C++11 <atomic>.  Where that
 // isn't available, we use GCC's older __sync functions instead.