From f3bd00c0168abaf13ac0733a77bc1106d3f6720d Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Mon, 20 Nov 2017 17:57:46 -0500
Subject: [PATCH] Add support for Motorola 88K to s_lock.h.
Apparently there are still people out there who care about this old
architecture. They probably care about dusty versions of Postgres
too, so back-patch to all supported branches.
David Carlier (from a patch being carried by OpenBSD packagers)
Discussion: https://postgr.es/m/CA+XhMqzwFSGVU7MEnfhCecc8YdP98tigXzzpd0AAdwaGwaVXEA@mail.gmail.com
---
src/include/storage/s_lock.h | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/src/include/storage/s_lock.h b/src/include/storage/s_lock.h
index 99e109853f..35088db10a 100644
--- a/src/include/storage/s_lock.h
+++ b/src/include/storage/s_lock.h
@@ -543,6 +543,30 @@ tas(volatile slock_t *lock)
#endif /* (__mc68000__ || __m68k__) && __linux__ */
+/* Motorola 88k */
+#if defined(__m88k__)
+#define HAS_TEST_AND_SET
+
+typedef unsigned int slock_t;
+
+#define TAS(lock) tas(lock)
+
+static __inline__ int
+tas(volatile slock_t *lock)
+{
+ register slock_t _res = 1;
+
+ __asm__ __volatile__(
+ " xmem %0, %2, %%r0 \n"
+: "+r"(_res), "+m"(*lock)
+: "r"(lock)
+: "memory");
+ return (int) _res;
+}
+
+#endif /* __m88k__ */
+
+
/*
* VAXen -- even multiprocessor ones
* (thanks to Tom Ivar Helbekkmo)