# HG changeset patch
# User aph
# Date 1479749357 0
# Node ID 8a46057442cd8af4a7e8f7976f65d160d14b0e03
# Parent  2fdb039ea5b5907c9a9bd0002912554a2fb4776b
8170098: AArch64: VM is extremely slow with JVMTI debugging enabled
Reviewed-by: roland

diff -r 2fdb039ea5b5 -r 8a46057442cd hotspot/src/cpu/aarch64/vm/interp_masm_aarch64.cpp
--- a/hotspot/src/cpu/aarch64/vm/interp_masm_aarch64.cpp	Mon Nov 21 09:33:06 2016 +0100
+++ b/hotspot/src/cpu/aarch64/vm/interp_masm_aarch64.cpp	Mon Nov 21 17:29:17 2016 +0000
@@ -407,10 +407,8 @@
     // JVMTI events, such as single-stepping, are implemented partly by avoiding running
     // compiled code in threads for which the event is enabled.  Check here for
     // interp_only_mode if these events CAN be enabled.
-    // interp_only is an int, on little endian it is sufficient to test the byte only
-    // Is a cmpl faster?
-    ldr(rscratch1, Address(rthread, JavaThread::interp_only_mode_offset()));
-    cbz(rscratch1, run_compiled_code);
+    ldrw(rscratch1, Address(rthread, JavaThread::interp_only_mode_offset()));
+    cbzw(rscratch1, run_compiled_code);
     ldr(rscratch1, Address(method, Method::interpreter_entry_offset()));
     br(rscratch1);
     bind(run_compiled_code);