add loongarch support

Signed-off-by: Jingyun Hua <huajingyun@loongson.cn>

add-loongarch-support.patch

@@ -0,0 +1,50 @@
+diff --git a/src/include/storage/s_lock.h b/src/include/storage/s_lock.h
+index 6b368a5..86e0e84 100644
+--- a/src/include/storage/s_lock.h
++++ b/src/include/storage/s_lock.h
+@@ -696,6 +696,45 @@ do \
+ 
+ #endif /* __mips__ && !__sgi */
+ 
++#if defined(__loongarch__)   /* loongarch */
++#define HAS_TEST_AND_SET
++
++typedef unsigned int slock_t;
++
++#define TAS(lock) tas(lock)
++
++static __inline__ int
++tas(volatile slock_t *lock)
++{
++	register volatile slock_t *_l = lock;
++	register int _res;
++	register int _tmp;
++
++	__asm__ __volatile__(
++		"       ll.w    %0, %2      \n"
++		"       ori     %1, %0, 1   \n"
++		"       sc.w    %1, %2      \n"
++		"       xori    %1, %1, 1   \n"
++		"       or      %0, %0, %1  \n"
++		"       dbar    0           \n"
++:              "=&r" (_res), "=&r" (_tmp), "+R" (*_l)
++:              /* no inputs */
++:              "memory");
++	return _res;
++}
++
++#define S_UNLOCK(lock) \
++do \
++{ \
++	__asm__ __volatile__( \
++		"  dbar  0 \n" \
++:              /* no outputs */ \
++:              /* no inputs */ \
++:              "memory"); \
++	*((volatile slock_t *) (lock)) = 0; \
++} while (0)
++#endif /* __loongarch__ */
++
+ 
+ #if defined(__m32r__) && defined(HAVE_SYS_TAS_H)	/* Renesas' M32R */
+ #define HAS_TEST_AND_SET

libpq.spec

@@ -1,6 +1,6 @@
 Name: libpq
 Version: 13.7
-Release: 1
+Release: 2
 Summary: PostgreSQL client library
 License: PostgreSQL
 Url: http://www.postgresql.org/
@@ -9,6 +9,7 @@ Source0: https://ftp.postgresql.org/pub/source/v%{version}/postgresql-%{version}
 Patch0001: libpq-10.3-rpm-pgsql.patch
 Patch0002: libpq-10.3-var-run-socket.patch
 Patch0003: libpq-12.1-symbol-versioning.patch
+Patch0004: add-loongarch-support.patch
 
 BuildRequires: gcc glibc-devel bison flex gawk zlib-devel openssl-devel
 BuildRequires: krb5-devel openldap-devel gettext multilib-rpm-config
@@ -79,6 +80,9 @@ cat pg_config-13.lang >>libpq-devel.lst
 %_libdir/pkgconfig/libpq.pc
 
 %changelog
+* Thu Dec  1 2022 huajingyun <huajingyun@loongson.cn> - 13.7-2
+- add loongarch support
+
 * Mon Jun 13 2022 duyiwei <duyiwei@kylinos.cn> - 13.7-1
 - upgrade libpq to 13.7,fix CVE-2021-32027,CVE-2022-1552