Enable riscv64

Signed-off-by: David Abdurachmanov <david.abdurachmanov@sifive.com>

firefox-68.7.0-add-riscv64.patch

@@ -0,0 +1,85 @@
+diff --git a/build/moz.configure/init.configure b/build/moz.configure/init.configure
+index c772604035..891359c5ba 100644
+--- a/build/moz.configure/init.configure
++++ b/build/moz.configure/init.configure
+@@ -730,6 +730,9 @@ def split_triplet(triplet, allow_unknown=False):
+     elif cpu.startswith('aarch64'):
+         canonical_cpu = 'aarch64'
+         endianness = 'little'
++    elif cpu.startswith('riscv64'):
++        canonical_cpu = 'riscv64'
++        endianness = 'little'
+     elif cpu == 'sh4':
+         canonical_cpu = 'sh4'
+         endianness = 'little'
+diff --git a/js/src/jit/AtomicOperations.h b/js/src/jit/AtomicOperations.h
+index 0486cbad1c..d00e2769a5 100644
+--- a/js/src/jit/AtomicOperations.h
++++ b/js/src/jit/AtomicOperations.h
+@@ -391,7 +391,8 @@ inline bool AtomicOperations::isLockfreeJS(int32_t size) {
+ #elif defined(__ppc__) || defined(__PPC__) || defined(__sparc__) ||     \
+     defined(__ppc64__) || defined(__PPC64__) || defined(__ppc64le__) || \
+     defined(__PPC64LE__) || defined(__alpha__) || defined(__hppa__) ||  \
+-    defined(__sh__) || defined(__s390__) || defined(__s390x__)
++    defined(__sh__) || defined(__s390__) || defined(__s390x__) ||       \
++    defined(__riscv)
+ #  include "jit/shared/AtomicOperations-feeling-lucky.h"
+ #else
+ #  error "No AtomicOperations support provided for this platform"
+diff --git a/js/src/jit/shared/AtomicOperations-feeling-lucky-gcc.h b/js/src/jit/shared/AtomicOperations-feeling-lucky-gcc.h
+index f002cd46c9..e4b6ff9c29 100644
+--- a/js/src/jit/shared/AtomicOperations-feeling-lucky-gcc.h
++++ b/js/src/jit/shared/AtomicOperations-feeling-lucky-gcc.h
+@@ -70,6 +70,13 @@
+ #  endif
+ #endif
+ 
++#ifdef __riscv
++#  if __riscv_xlen == 64
++#    define HAS_64BIT_ATOMICS
++#    define HAS_64BIT_LOCKFREE
++#  endif
++#endif
++
+ #ifdef JS_CODEGEN_NONE
+ #  ifdef JS_64BIT
+ #    define HAS_64BIT_ATOMICS
+diff --git a/mfbt/tests/TestPoisonArea.cpp b/mfbt/tests/TestPoisonArea.cpp
+index 2834678ad8..381ad08df1 100644
+--- a/mfbt/tests/TestPoisonArea.cpp
++++ b/mfbt/tests/TestPoisonArea.cpp
+@@ -159,6 +159,14 @@
+ #elif defined __aarch64__ || defined _M_ARM64
+ #  define RETURN_INSTR 0xd65f03c0 /* ret */
+ 
++#elif defined(__riscv) && defined(__riscv_xlen) && __riscv_xlen == 64
++#if defined(__riscv_compressed)
++#define RETURN_INSTR 0x8082 /* ret */
++#define RETURN_INSTR_TYPE uint16_t
++#else
++#define RETURN_INSTR 0x00008067 /* ret */
++#endif
++
+ #elif defined __ia64
+ struct ia64_instr {
+   uint32_t mI[4];
+diff --git a/python/mozbuild/mozbuild/configure/constants.py b/python/mozbuild/mozbuild/configure/constants.py
+index 8b7d2261d2..8619421cac 100644
+--- a/python/mozbuild/mozbuild/configure/constants.py
++++ b/python/mozbuild/mozbuild/configure/constants.py
+@@ -50,6 +50,7 @@ CPU_bitness = {
+     'mips64': 64,
+     'ppc': 32,
+     'ppc64': 64,
++    'riscv64': 64,
+     's390': 32,
+     's390x': 64,
+     'sh4': 32,
+@@ -89,6 +90,7 @@ CPU_preprocessor_checks = OrderedDict((
+     ('mips64', '__mips64'),
+     ('mips32', '__mips__'),
+     ('sh4', '__sh__'),
++    ('riscv64', 'defined(__riscv) && defined(__riscv_xlen) && __riscv_xlen == 64'),
+ ))
+ 
+ assert sorted(CPU_preprocessor_checks.keys()) == sorted(CPU.POSSIBLE_VALUES)

mozjs68.spec

@@ -28,7 +28,7 @@
 
 Name:           mozjs%{major}
 Version:        68.7.0
-Release:        1%{?dist}
+Release:        1.0.riscv64%{?dist}
 Summary:        SpiderMonkey JavaScript library
 
 License:        MPLv2.0 and MPLv1.1 and BSD and GPLv2+ and GPLv3+ and LGPLv2+ and AFL and ASL 2.0
@@ -64,6 +64,8 @@ Patch26:        build-icu-big-endian.patch
 # Support Python 3 in js tests
 Patch30:        jstests_python-3.patch
 
+Patch400:       firefox-68.7.0-add-riscv64.patch
+
 BuildRequires:  autoconf213
 BuildRequires:  cargo
 BuildRequires:  clang-devel
@@ -133,6 +135,9 @@ pushd ../..
 # Execute tests with Python 3
 %patch30 -p1
 
+# riscv
+%patch400 -p1
+
 # make sure we don't ever accidentally link against bundled security libs
 rm -rf security/
 popd
@@ -169,6 +174,9 @@ autoconf-2.13
   --disable-optimize \
   --enable-pie \
   --disable-jemalloc \
+%ifarch riscv64
+  --disable-ion \
+%endif
   --enable-unaligned-private-values
 
 %if 0%{?big_endian}
@@ -263,6 +271,9 @@ PYTHONPATH=tests/lib %{__python3} jit-test/jit_test.py -s -t 1800 --no-progress
 %{_includedir}/mozjs-%{major}/
 
 %changelog
+* Sat Apr 11 2020 David Abdurachmanov <david.abdurachmanov@sifive.com> - 68.7.0-1.0.riscv64
+- Add support for RISC-V (riscv64)
+
 * Tue Apr 07 2020 Frantisek Zatloukal <fzatlouk@redhat.com> - 68.7.0-1
 - Update to 68.7.0