30 lines
1000 B
Diff
30 lines
1000 B
Diff
|
# HG changeset patch
|
||
|
|
# User aph
|
||
|
|
# Date 1338206478 14400
|
||
|
|
# Mon May 28 08:01:18 2012 -0400
|
||
|
|
# Node ID 6275d7b419091092752d5a1854194c98897892ba
|
||
|
|
# Parent be1379a186ba527b32c93a83e04c9600735fe44b
|
||
|
|
PR3559: Use ldrexd for atomic reads on ARMv7.
|
||
|
|
|
||
|
|
2012-05-28 Andrew Haley <aph@redhat.com>
|
||
|
|
|
||
|
|
* os_linux_zero.hpp (atomic_copy64): Use ldrexd for atomic reads
|
||
|
|
on ARMv7.
|
||
|
|
|
||
|
|
diff --git openjdk.orig/hotspot/src/os_cpu/linux_zero/vm/os_linux_zero.hpp openjdk/hotspot/src/os_cpu/linux_zero/vm/os_linux_zero.hpp
|
||
|
|
--- openjdk.orig/hotspot/src/os_cpu/linux_zero/vm/os_linux_zero.hpp
|
||
|
|
+++ openjdk/hotspot/src/os_cpu/linux_zero/vm/os_linux_zero.hpp
|
||
|
|
@@ -54,6 +54,12 @@
|
||
|
|
"std %0, 0(%2)\n"
|
||
|
|
: "=r"(tmp)
|
||
|
|
: "a"(src), "a"(dst));
|
||
|
|
+#elif defined(__ARM_ARCH_7A__)
|
||
|
|
+ jlong tmp;
|
||
|
|
+ asm volatile ("ldrexd %0, [%1]\n"
|
||
|
|
+ : "=r"(tmp)
|
||
|
|
+ : "r"(src), "m"(src));
|
||
|
|
+ *(jlong *) dst = tmp;
|
||
|
|
#else
|
||
|
|
*(jlong *) dst = *(jlong *) src;
|
||
|
|
#endif
|