diff --git a/lib/libcompiler_rt/Makefile b/lib/libcompiler_rt/Makefile
index 83c4ea33b45..a02877c00cf 100644
--- a/lib/libcompiler_rt/Makefile
+++ b/lib/libcompiler_rt/Makefile
@@ -157,7 +157,7 @@ SRCF+=	divsi3 \
 .endif
 
 # FreeBSD-specific atomic intrinsics.
-.if ${MACHINE_CPUARCH} == "arm" || ${MACHINE_CPUARCH} == "mips"
+.if ${MACHINE_CPUARCH} == "arm"
 SRCF+=	__sync_fetch_and_add_4 \
 	__sync_fetch_and_and_4 \
 	__sync_fetch_and_or_4 \
@@ -166,15 +166,10 @@ SRCF+=	__sync_fetch_and_add_4 \
 	__sync_lock_test_and_set_4 \
 	__sync_synchronize \
 	__sync_val_compare_and_swap_4
-.endif
-.if ${MACHINE_ARCH:Mmips64*} != ""
-SRCF+=	__sync_fetch_and_add_8 \
-	__sync_fetch_and_and_8 \
-	__sync_fetch_and_or_8 \
-	__sync_fetch_and_sub_8 \
-	__sync_fetch_and_xor_8 \
-	__sync_lock_test_and_set_8 \
-	__sync_val_compare_and_swap_8
+.elif ${MACHINE_CPUARCH} == "mips"
+.PATH: ${.CURDIR}/../../sys/mips/mips
+
+SRCF+=	stdatomic
 .endif
 
 .for file in ${SRCF}
diff --git a/lib/libcompiler_rt/__sync_fetch_and_add_8.c b/lib/libcompiler_rt/__sync_fetch_and_add_8.c
deleted file mode 100644
index 2738d5dd82e..00000000000
--- a/lib/libcompiler_rt/__sync_fetch_and_add_8.c
+++ /dev/null
@@ -1,6 +0,0 @@
-/* $FreeBSD$ */
-#define	NAME		__sync_fetch_and_add_8
-#define	TYPE		int64_t
-#define	FETCHADD(x, y)	atomic_fetchadd_64(x, y)
-
-#include "__sync_fetch_and_op_n.h"
diff --git a/lib/libcompiler_rt/__sync_fetch_and_and_8.c b/lib/libcompiler_rt/__sync_fetch_and_and_8.c
deleted file mode 100644
index f681785b64a..00000000000
--- a/lib/libcompiler_rt/__sync_fetch_and_and_8.c
+++ /dev/null
@@ -1,7 +0,0 @@
-/* $FreeBSD$ */
-#define	NAME		__sync_fetch_and_and_8
-#define	TYPE		int64_t
-#define	CMPSET		atomic_cmpset_64
-#define	EXPRESSION	t & value
-
-#include "__sync_fetch_and_op_n.h"
diff --git a/lib/libcompiler_rt/__sync_fetch_and_or_8.c b/lib/libcompiler_rt/__sync_fetch_and_or_8.c
deleted file mode 100644
index c88a37b7f20..00000000000
--- a/lib/libcompiler_rt/__sync_fetch_and_or_8.c
+++ /dev/null
@@ -1,7 +0,0 @@
-/* $FreeBSD$ */
-#define	NAME		__sync_fetch_and_or_8
-#define	TYPE		int64_t
-#define	CMPSET		atomic_cmpset_64
-#define	EXPRESSION	t | value
-
-#include "__sync_fetch_and_op_n.h"
diff --git a/lib/libcompiler_rt/__sync_fetch_and_sub_8.c b/lib/libcompiler_rt/__sync_fetch_and_sub_8.c
deleted file mode 100644
index 4f239b3e920..00000000000
--- a/lib/libcompiler_rt/__sync_fetch_and_sub_8.c
+++ /dev/null
@@ -1,6 +0,0 @@
-/* $FreeBSD$ */
-#define	NAME		__sync_fetch_and_sub_8
-#define	TYPE		int64_t
-#define	FETCHADD(x, y)	atomic_fetchadd_64(x, -(y))
-
-#include "__sync_fetch_and_op_n.h"
diff --git a/lib/libcompiler_rt/__sync_fetch_and_xor_8.c b/lib/libcompiler_rt/__sync_fetch_and_xor_8.c
deleted file mode 100644
index be677f5794c..00000000000
--- a/lib/libcompiler_rt/__sync_fetch_and_xor_8.c
+++ /dev/null
@@ -1,7 +0,0 @@
-/* $FreeBSD$ */
-#define	NAME		__sync_fetch_and_xor_8
-#define	TYPE		int64_t
-#define	CMPSET		atomic_cmpset_64
-#define	EXPRESSION	t ^ value
-
-#include "__sync_fetch_and_op_n.h"
diff --git a/lib/libcompiler_rt/__sync_lock_test_and_set_8.c b/lib/libcompiler_rt/__sync_lock_test_and_set_8.c
deleted file mode 100644
index 83c1a6acc6a..00000000000
--- a/lib/libcompiler_rt/__sync_lock_test_and_set_8.c
+++ /dev/null
@@ -1,7 +0,0 @@
-/* $FreeBSD$ */
-#define	NAME		__sync_lock_test_and_set_8
-#define	TYPE		int64_t
-#define	CMPSET		atomic_cmpset_64
-#define	EXPRESSION	value
-
-#include "__sync_fetch_and_op_n.h"
diff --git a/lib/libcompiler_rt/__sync_val_compare_and_swap_8.c b/lib/libcompiler_rt/__sync_val_compare_and_swap_8.c
deleted file mode 100644
index 6b7a17d5b3c..00000000000
--- a/lib/libcompiler_rt/__sync_val_compare_and_swap_8.c
+++ /dev/null
@@ -1,6 +0,0 @@
-/* $FreeBSD$ */
-#define	NAME		__sync_val_compare_and_swap_8
-#define	TYPE		int64_t
-#define	CMPSET		atomic_cmpset_64
-
-#include "__sync_val_compare_and_swap_n.h"