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authormatt <matt@NetBSD.org>2014-01-27 18:03:44 +0000
committermatt <matt@NetBSD.org>2014-01-27 18:03:44 +0000
commit2fed048ecf4093303401004d8a50ff595b68c0b2 (patch)
tree221141860d57bd5c37b20fa36c2bf3944a488969 /common
parentd792ce8ed988c659524c53fdd332b23c1bca28b5 (diff)
Add _atomic_cas_16 and _atomic_cas_8 and their aliases
__sync_val_compare_and_swap_2 & __sync_val_compare_and_swap_1
Diffstat (limited to 'common')
-rw-r--r--common/lib/libc/atomic/atomic_init_testset.c96
1 files changed, 91 insertions, 5 deletions
diff --git a/common/lib/libc/atomic/atomic_init_testset.c b/common/lib/libc/atomic/atomic_init_testset.c
index 40c5f7345c0..441c553e621 100644
--- a/common/lib/libc/atomic/atomic_init_testset.c
+++ b/common/lib/libc/atomic/atomic_init_testset.c
@@ -1,4 +1,4 @@
-/* $NetBSD: atomic_init_testset.c,v 1.9 2013/08/21 03:00:56 matt Exp $ */
+/* $NetBSD: atomic_init_testset.c,v 1.10 2014/01/27 18:03:44 matt Exp $ */
/*-
* Copyright (c) 2008 The NetBSD Foundation, Inc.
@@ -36,7 +36,7 @@
*/
#include <sys/cdefs.h>
-__RCSID("$NetBSD: atomic_init_testset.c,v 1.9 2013/08/21 03:00:56 matt Exp $");
+__RCSID("$NetBSD: atomic_init_testset.c,v 1.10 2014/01/27 18:03:44 matt Exp $");
#include "atomic_op_namespace.h"
@@ -59,13 +59,29 @@ extern uint32_t _atomic_cas_up(volatile uint32_t *, uint32_t, uint32_t);
#else
static uint32_t _atomic_cas_up(volatile uint32_t *, uint32_t, uint32_t);
#endif
-
static uint32_t (*_atomic_cas_fn)(volatile uint32_t *, uint32_t, uint32_t) =
_atomic_cas_up;
+RAS_DECL(_atomic_cas);
-void __libc_atomic_init(void) __attribute__ ((visibility("hidden")));
+#ifdef __HAVE_ASM_ATOMIC_CAS_16_UP
+extern uint16_t _atomic_cas_16_up(volatile uint16_t *, uint16_t, uint16_t);
+#else
+static uint16_t _atomic_cas_16_up(volatile uint16_t *, uint16_t, uint16_t);
+#endif
+static uint16_t (*_atomic_cas_16_fn)(volatile uint16_t *, uint16_t, uint16_t) =
+ _atomic_cas_16_up;
+RAS_DECL(_atomic_cas_16);
-RAS_DECL(_atomic_cas);
+#ifdef __HAVE_ASM_ATOMIC_CAS_8_UP
+extern uint8_t _atomic_cas_8_up(volatile uint8_t *, uint8_t, uint8_t);
+#else
+static uint8_t _atomic_cas_8_up(volatile uint8_t *, uint8_t, uint8_t);
+#endif
+static uint8_t (*_atomic_cas_8_fn)(volatile uint8_t *, uint8_t, uint8_t) =
+ _atomic_cas_8_up;
+RAS_DECL(_atomic_cas_8);
+
+void __libc_atomic_init(void) __attribute__ ((visibility("hidden")));
#ifndef __HAVE_ASM_ATOMIC_CAS_UP
static uint32_t
@@ -85,6 +101,42 @@ _atomic_cas_up(volatile uint32_t *ptr, uint32_t old, uint32_t new)
}
#endif
+#ifndef __HAVE_ASM_ATOMIC_CAS_16_UP
+static uint16_t
+_atomic_cas_up_16(volatile uint16_t *ptr, uint16_t old, uint16_t new)
+{
+ uint16_t ret;
+
+ RAS_START(_atomic_cas_16);
+ ret = *ptr;
+ if (__predict_false(ret != old)) {
+ return ret;
+ }
+ *ptr = new;
+ RAS_END(_atomic_cas_16);
+
+ return ret;
+}
+#endif
+
+#ifndef __HAVE_ASM_ATOMIC_CAS_UP
+static uint8_t
+_atomic_cas_up(volatile uint8_t *ptr, uint8_t old, uint8_t new)
+{
+ uint8_t ret;
+
+ RAS_START(_atomic_cas_8);
+ ret = *ptr;
+ if (__predict_false(ret != old)) {
+ return ret;
+ }
+ *ptr = new;
+ RAS_END(_atomic_cas_16);
+
+ return ret;
+}
+#endif
+
static uint32_t
_atomic_cas_mp(volatile uint32_t *ptr, uint32_t old, uint32_t new)
{
@@ -109,6 +161,24 @@ _atomic_cas_32(volatile uint32_t *ptr, uint32_t old, uint32_t new)
return (*_atomic_cas_fn)(ptr, old, new);
}
+uint16_t _atomic_cas_16(volatile uint16_t *, uint16_t, uint16_t);
+
+uint16_t
+_atomic_cas_16(volatile uint16_t *ptr, uint16_t old, uint16_t new)
+{
+
+ return (*_atomic_cas_16_fn)(ptr, old, new);
+}
+
+uint8_t _atomic_cas_8(volatile uint8_t *, uint8_t, uint8_t);
+
+uint8_t
+_atomic_cas_8(volatile uint8_t *ptr, uint8_t old, uint8_t new)
+{
+
+ return (*_atomic_cas_8_fn)(ptr, old, new);
+}
+
void __section(".text.startup")
__libc_atomic_init(void)
{
@@ -129,6 +199,18 @@ __libc_atomic_init(void)
_atomic_cas_fn = _atomic_cas_up;
return;
}
+
+ if (rasctl(RAS_ADDR(_atomic_cas_16), RAS_SIZE(_atomic_cas_16),
+ RAS_INSTALL) == 0) {
+ _atomic_cas_16_fn = _atomic_cas_16_up;
+ return;
+ }
+
+ if (rasctl(RAS_ADDR(_atomic_cas_8), RAS_SIZE(_atomic_cas_8),
+ RAS_INSTALL) == 0) {
+ _atomic_cas_8_fn = _atomic_cas_8_up;
+ return;
+ }
}
#undef atomic_cas_32
@@ -156,3 +238,7 @@ atomic_op_alias(atomic_cas_ulong_ni,_atomic_cas_32)
__strong_alias(_atomic_cas_ulong_ni,_atomic_cas_32)
atomic_op_alias(atomic_cas_ptr_ni,_atomic_cas_32)
__strong_alias(_atomic_cas_ptr_ni,_atomic_cas_32)
+
+__strong_alias(__sync_val_compare_and_swap_4,_atomic_cas_32)
+__strong_alias(__sync_val_compare_and_swap_2,_atomic_cas_16)
+__strong_alias(__sync_val_compare_and_swap_1,_atomic_cas_8)