Add support for RISC-V (riscv64)

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

firefox-52.7.2esr-add-riscv64.patch

@@ -0,0 +1,67 @@
+diff --git a/build/moz.configure/init.configure b/build/moz.configure/init.configure
+index 2123beb..edd9236 100644
+--- a/build/moz.configure/init.configure
++++ b/build/moz.configure/init.configure
+@@ -380,6 +380,9 @@ def split_triplet(triplet):
+     elif cpu.startswith('aarch64'):
+         canonical_cpu = 'aarch64'
+         endianness = 'little'
++    elif cpu.startswith('riscv64'):
++        canonical_cpu = 'riscv64'
++        endianness = 'little'
+     else:
+         die('Unknown CPU type: %s' % cpu)
+ 
+diff --git a/mfbt/double-conversion/utils.h b/mfbt/double-conversion/utils.h
+index 15dd4bf..4f37218 100644
+--- a/mfbt/double-conversion/utils.h
++++ b/mfbt/double-conversion/utils.h
+@@ -60,7 +60,8 @@
+     defined(__sparc__) || defined(__sparc) || defined(__s390__) || \
+     defined(__SH4__) || defined(__alpha__) || \
+     defined(_MIPS_ARCH_MIPS32R2) || \
+-    defined(__AARCH64EL__) || defined(__aarch64__)
++    defined(__AARCH64EL__) || defined(__aarch64__) || \
++    defined(__riscv)
+ #define DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS 1
+ #elif defined(_M_IX86) || defined(__i386__) || defined(__i386)
+ #if defined(_WIN32)
+diff --git a/mfbt/tests/TestPoisonArea.cpp b/mfbt/tests/TestPoisonArea.cpp
+index 6f1b61e..7063ab9 100644
+--- a/mfbt/tests/TestPoisonArea.cpp
++++ b/mfbt/tests/TestPoisonArea.cpp
+@@ -157,6 +157,14 @@
+ #elif defined __aarch64__
+ #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]; };
+ static const ia64_instr _return_instr =
+diff --git a/python/mozbuild/mozbuild/configure/constants.py b/python/mozbuild/mozbuild/configure/constants.py
+index dfc7cf8..10035cb 100644
+--- a/python/mozbuild/mozbuild/configure/constants.py
++++ b/python/mozbuild/mozbuild/configure/constants.py
+@@ -48,6 +48,7 @@ CPU_bitness = {
+     'mips64': 64,
+     'ppc': 32,
+     'ppc64': 64,
++    'riscv64': 64,
+     's390': 32,
+     's390x': 64,
+     'sparc': 32,
+@@ -85,6 +86,7 @@ CPU_preprocessor_checks = OrderedDict((
+     ('sparc', '__sparc__'),
+     ('mips64', '__mips64'),
+     ('mips32', '__mips__'),
++    ('riscv64', 'defined(__riscv) && defined(__riscv_xlen) && __riscv_xlen == 64'),
+ ))
+ 
+ assert sorted(CPU_preprocessor_checks.keys()) == sorted(CPU.POSSIBLE_VALUES)

mozjs52.spec

@@ -12,7 +12,7 @@
 
 Name:           mozjs%{major}
 Version:        52.9.0
-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 LGPLv2.1 and LGPLv2.1+ and AFL and ASL 2.0
@@ -40,6 +40,9 @@ Patch26:        build-icu-big-endian.patch
 Patch36:        build-missing-xlocale-h.patch
 Patch304:       mozilla-1253216.patch
 
+# Add support for RISC-V (riscv64)
+Patch400:       firefox-52.7.2esr-add-riscv64.patch
+
 BuildRequires:  autoconf213
 BuildRequires:  gcc
 BuildRequires:  gcc-c++
@@ -93,6 +96,7 @@ pushd ../..
 %endif
 
 %patch304 -p1 -b .1253216
+%patch400 -p1 -b .riscv64
 
 # make sure we don't ever accidentally link against bundled security libs
 rm -rf security/
@@ -123,7 +127,7 @@ autoconf-2.13
 %ifarch s390 s390x
   --disable-jemalloc \
 %endif
-%ifarch %{arm} aarch64 ppc %{power64}
+%ifarch %{arm} aarch64 ppc %{power64} riscv64
   --disable-ion
 %endif
 
@@ -184,6 +188,9 @@ ln -s libmozjs-%{major}.so.0 %{buildroot}%{_libdir}/libmozjs-%{major}.so
 %{_includedir}/mozjs-%{major}/
 
 %changelog
+* Tue Oct 16 2018 David Abdurachmanov <david.abdurachmanov@gmail.com> - 52.9.0-1.0.riscv64
+- Add support for RISC-V (riscv64)
+
 * Wed Jul 25 2018 Kalev Lember <klember@redhat.com> - 52.9.0-1
 - Update to 52.9.0