From b5a58d2c001689b07591fdce8820773d57a74002 Mon Sep 17 00:00:00 2001
From: Chenxi Mao <chenxi.mao2013@gmail.com>
Date: Fri, 3 Apr 2020 08:33:10 +0800
Subject: [PATCH 1/1] Riscv: Add support for riscv

---
 CMakeLists.txt                       |  2 ++
 Source/JavaScriptCore/CMakeLists.txt |  1 +
 Source/WTF/wtf/Platform.h            | 12 ++++++++++--
 Source/WTF/wtf/dtoa/utils.h          |  2 +-
 4 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 31a2ea1fd..516476729 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -83,6 +83,8 @@ elseif (LOWERCASE_CMAKE_SYSTEM_PROCESSOR MATCHES "s390")
     set(WTF_CPU_S390 1)
 elseif (LOWERCASE_CMAKE_SYSTEM_PROCESSOR MATCHES "s390x")
     set(WTF_CPU_S390X 1)
+elseif (LOWERCASE_CMAKE_SYSTEM_PROCESSOR MATCHES "riscv64")
+    set(WTF_CPU_RISCV64 1)
 else ()
     message(FATAL_ERROR "Unknown CPU '${LOWERCASE_CMAKE_SYSTEM_PROCESSOR}'")
 endif ()
diff --git a/Source/JavaScriptCore/CMakeLists.txt b/Source/JavaScriptCore/CMakeLists.txt
index 937b3ed00..2fff29f9d 100644
--- a/Source/JavaScriptCore/CMakeLists.txt
+++ b/Source/JavaScriptCore/CMakeLists.txt
@@ -1286,6 +1286,7 @@ elseif (WTF_CPU_S390)
 elseif (WTF_CPU_S390X)
 elseif (WTF_CPU_MIPS)
 elseif (WTF_CPU_SH4)
+elseif (WTF_CPU_RISCV64)
 elseif (WTF_CPU_X86)
 elseif (WTF_CPU_X86_64)
     if (MSVC AND ENABLE_JIT)
diff --git a/Source/WTF/wtf/Platform.h b/Source/WTF/wtf/Platform.h
index 5717f3ea1..8fac85f72 100644
--- a/Source/WTF/wtf/Platform.h
+++ b/Source/WTF/wtf/Platform.h
@@ -349,7 +349,14 @@
 
 #endif /* ARM */
 
-#if CPU(ARM) || CPU(MIPS) || CPU(SH4) || CPU(ALPHA) || CPU(HPPA)
+#if defined(__riscv)
+#define WTF_CPU_RISCV 1
+#if __riscv_xlen == 64
+#define WTF_CPU_RISCV64 1
+#endif
+#endif
+
+#if CPU(ARM) || CPU(MIPS) || CPU(SH4) || CPU(ALPHA) || CPU(HPPA) || CPU(RISCV)
 #define WTF_CPU_NEEDS_ALIGNED_ACCESS 1
 #endif
 
@@ -707,7 +714,8 @@
     || CPU(S390X) \
     || CPU(MIPS64) \
     || CPU(PPC64) \
-    || CPU(PPC64LE)
+    || CPU(PPC64LE) \
+    || CPU(RISCV64)
 #define USE_JSVALUE64 1
 #else
 #define USE_JSVALUE32_64 1
diff --git a/Source/WTF/wtf/dtoa/utils.h b/Source/WTF/wtf/dtoa/utils.h
index 05302e6e6..25dd352ee 100644
--- a/Source/WTF/wtf/dtoa/utils.h
+++ b/Source/WTF/wtf/dtoa/utils.h
@@ -49,7 +49,7 @@
 defined(__ARMEL__) || \
 defined(_MIPS_ARCH_MIPS32R2)
 #define DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS 1
-#elif CPU(MIPS) || CPU(MIPS64) || CPU(PPC) || CPU(PPC64) || CPU(PPC64LE) || CPU(SH4) || CPU(S390) || CPU(S390X) || CPU(IA64) || CPU(ALPHA) || CPU(ARM64) || CPU(HPPA) || CPU(ARM)
+#elif CPU(MIPS) || CPU(MIPS64) || CPU(PPC) || CPU(PPC64) || CPU(PPC64LE) || CPU(SH4) || CPU(S390) || CPU(S390X) || CPU(IA64) || CPU(ALPHA) || CPU(ARM64) || CPU(HPPA) || CPU(ARM) || CPU(RISCV)
 #define DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS 1
 #elif defined(_M_IX86) || defined(__i386__)
 #if defined(_WIN32)
-- 
2.17.1