From 9171149440fcb1e8c3459372716577cd81e62734 Mon Sep 17 00:00:00 2001
From: Evgeniy Didin <Evgeniy.Didin@synopsys.com>
Date: Thu, 2 Apr 2020 20:33:21 +0300
Subject: [PATCH] mozjs: Introduce ARC support

Signed-off-by: Evgeniy Didin <Evgeniy.Didin@synopsys.com>
---
 build/autoconf/config.guess                      | 3 +++
 build/moz.configure/init.configure               | 3 +++
 mfbt/double-conversion/double-conversion/utils.h | 2 +-
 python/mozbuild/mozbuild/configure/constants.py  | 2 ++
 4 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/build/autoconf/config.guess b/build/autoconf/config.guess
index 1277a86..e3c40ec 100755
--- a/build/autoconf/config.guess
+++ b/build/autoconf/config.guess
@@ -1032,6 +1032,9 @@ EOF
     riscv32:Linux:*:* | riscv64:Linux:*:*)
 	echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
 	exit ;;
+    arc:Linux:*:*)
+        echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
+        exit ;;
     s390:Linux:*:* | s390x:Linux:*:*)
 	echo ${UNAME_MACHINE}-ibm-linux-${LIBC}
 	exit ;;
diff --git a/build/moz.configure/init.configure b/build/moz.configure/init.configure
index 648ac2d..7618f08 100644
--- a/build/moz.configure/init.configure
+++ b/build/moz.configure/init.configure
@@ -661,6 +661,9 @@ def split_triplet(triplet, allow_unknown=False):
     elif cpu in ('riscv32', 'riscv64'):
         canonical_cpu = cpu
         endianness = 'little'
+    elif cpu in ('arc'):
+        canonical_cpu = 'arc'
+        endianness = 'little'
     elif allow_unknown:
         canonical_cpu = cpu
         endianness = 'unknown'
diff --git a/mfbt/double-conversion/double-conversion/utils.h b/mfbt/double-conversion/double-conversion/utils.h
index 5f17c04..f4ff736 100644
--- a/mfbt/double-conversion/double-conversion/utils.h
+++ b/mfbt/double-conversion/double-conversion/utils.h
@@ -77,7 +77,7 @@ inline void abort_noreturn() { MOZ_CRASH(); }
     defined(__SH4__) || defined(__alpha__) || \
     defined(_MIPS_ARCH_MIPS32R2) || \
     defined(__AARCH64EL__) || defined(__aarch64__) || \
-    defined(__riscv)
+    defined(__riscv) || defined(__arc__)
 #define DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS 1
 #elif defined(__mc68000__)
 #undef DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS
diff --git a/python/mozbuild/mozbuild/configure/constants.py b/python/mozbuild/mozbuild/configure/constants.py
index 1067b6a..1f700b8 100644
--- a/python/mozbuild/mozbuild/configure/constants.py
+++ b/python/mozbuild/mozbuild/configure/constants.py
@@ -52,6 +52,7 @@ CPU_bitness = {
     'ppc64': 64,
     'riscv32': 32,
     'riscv64': 64,
+    'arc': 32,
     's390': 32,
     's390x': 64,
     'sh4': 32,
@@ -86,6 +87,7 @@ CPU_preprocessor_checks = OrderedDict((
     ('ppc', '__powerpc__'),
     ('riscv32', '__riscv && __SIZEOF_POINTER__ == 4'),
     ('riscv64', '__riscv && __SIZEOF_POINTER__ == 8'),
+    ('arc', '__arc__'),
     ('Alpha', '__alpha__'),
     ('hppa', '__hppa__'),
     ('sparc64', '__sparc__ && __arch64__'),
-- 
2.16.2