build: add loong64 configure

PR-URL: #41323
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Michael Dawson <midawson@redhat.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Mary Marchini <oss@mmarchini.me>

configure.py

@@ -47,7 +47,8 @@
 valid_os = ('win', 'mac', 'solaris', 'freebsd', 'openbsd', 'linux',
             'android', 'aix', 'cloudabi')
 valid_arch = ('arm', 'arm64', 'ia32', 'mips', 'mipsel', 'mips64el', 'ppc',
-              'ppc64', 'x32','x64', 'x86', 'x86_64', 's390x', 'riscv64')
+              'ppc64', 'x32','x64', 'x86', 'x86_64', 's390x', 'riscv64',
+              'loong64')
 valid_arm_float_abi = ('soft', 'softfp', 'hard')
 valid_arm_fpu = ('vfp', 'vfpv3', 'vfpv3-d16', 'neon')
 valid_mips_arch = ('loongson', 'r1', 'r2', 'r6', 'rx')
@@ -1074,6 +1075,7 @@ def host_arch_cc():
     '__x86_64__'  : 'x64',
     '__s390x__'   : 's390x',
     '__riscv'     : 'riscv',
+    '__loongarch64': 'loong64',
   }
 
   rtn = 'ia32' # default

tools/v8_gypfiles/toolchain.gypi

@@ -280,6 +280,11 @@
           'CAN_USE_FPU_INSTRUCTIONS'
         ],
       }],
+      ['v8_target_arch=="loong64"', {
+        'defines': [
+          'V8_TARGET_ARCH_LOONG64',
+        ],
+      }],
       ['v8_target_arch=="s390x"', {
         'defines': [
           'V8_TARGET_ARCH_S390',

tools/v8_gypfiles/v8.gyp

@@ -292,6 +292,11 @@
             '<(V8_ROOT)/src/builtins/riscv64/builtins-riscv64.cc',
           ],
         }],        
+        ['v8_target_arch=="loong64" or v8_target_arch=="loong64"', {
+          'sources': [
+            '<(V8_ROOT)/src/builtins/loong64/builtins-loong64.cc',
+          ],
+        }],        
         ['v8_target_arch=="mips64" or v8_target_arch=="mips64el"', {
           'sources': [
             '<(V8_ROOT)/src/builtins/mips64/builtins-mips64.cc',
@@ -647,6 +652,11 @@
               '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_current_cpu == \\"riscv64\\".*?sources \\+= ")',
             ],
           }],
+          ['v8_target_arch=="loong64"', {
+            'sources': [
+              '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "v8_header_set.\\"v8_internal_headers\\".*?v8_current_cpu == \\"loong64\\".*?sources \\+= ")',
+            ],
+          }],
         ],
       },
     },  # v8_internal_headers
@@ -875,6 +885,11 @@
             '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_current_cpu == \\"riscv64\\".*?sources \\+= ")',
           ],
         }],        
+        ['v8_target_arch=="loong64"', {
+          'sources': [
+            '<!@pymod_do_main(GN-scraper "<(V8_ROOT)/BUILD.gn"  "\\"v8_base_without_compiler.*?v8_current_cpu == \\"loong64\\".*?sources \\+= ")',
+          ],
+        }],        
         ['OS=="win"', {
           'msvs_precompiled_header': '<(V8_ROOT)/../../tools/msvs/pch/v8_pch.h',
           'msvs_precompiled_source': '<(V8_ROOT)/../../tools/msvs/pch/v8_pch.cc',
@@ -940,7 +955,7 @@
         }],
         # Platforms that don't have Compare-And-Swap (CAS) support need to link atomic library
         # to implement atomic memory access
-        ['v8_current_cpu in ["mips", "mipsel", "mips64", "mips64el", "ppc", "arm", "riscv64"]', {
+        ['v8_current_cpu in ["mips", "mipsel", "mips64", "mips64el", "ppc", "arm", "riscv64", "loong64"]', {
           'link_settings': {
             'libraries': ['-latomic', ],
           },
@@ -1611,6 +1626,11 @@
                   '<(V8_ROOT)/src/heap/base/asm/riscv64/push_registers_asm.cc',
                 ],
               }],
+              ['_toolset == "host" and host_arch == "loong64" or _toolset == "target" and target_arch=="loong64"', {
+                'sources': [
+                  '<(V8_ROOT)/src/heap/base/asm/loong64/push_registers_asm.cc',
+                ],
+              }],
             ]
           }],
           ['OS=="win"', {