# HG changeset patch
# User fyang
# Date 1455612792 -28800
#      Tue Feb 16 16:53:12 2016 +0800
# Node ID af99f6e4efec0fd4fdc2e5b4b011e9809545005a
# Parent  6ac1feb0794ca1a42f9232997e4c0530f67ba750
8149907: aarch64: use load/store pair instructions in call_stub
Summary: aarch64: make use of load/store pair instructions in call_stub to save space
Reviewed-by: duke
Contributed-by: felix.yang@linaro.org

diff --git a/src/cpu/aarch64/vm/stubGenerator_aarch64.cpp b/src/cpu/aarch64/vm/stubGenerator_aarch64.cpp
--- a/src/cpu/aarch64/vm/stubGenerator_aarch64.cpp
+++ b/src/cpu/aarch64/vm/stubGenerator_aarch64.cpp
@@ -254,31 +254,20 @@
     // rthread because we want to sanity check rthread later
     __ str(c_rarg7,  thread);
     __ strw(c_rarg6, parameter_size);
-    __ str(c_rarg5,  parameters);
-    __ str(c_rarg4,  entry_point);
-    __ str(c_rarg3,  method);
-    __ str(c_rarg2,  result_type);
-    __ str(c_rarg1,  result);
-    __ str(c_rarg0,  call_wrapper);
-    __ str(r19,      r19_save);
-    __ str(r20,      r20_save);
-    __ str(r21,      r21_save);
-    __ str(r22,      r22_save);
-    __ str(r23,      r23_save);
-    __ str(r24,      r24_save);
-    __ str(r25,      r25_save);
-    __ str(r26,      r26_save);
-    __ str(r27,      r27_save);
-    __ str(r28,      r28_save);
-
-    __ strd(v8,      d8_save);
-    __ strd(v9,      d9_save);
-    __ strd(v10,     d10_save);
-    __ strd(v11,     d11_save);
-    __ strd(v12,     d12_save);
-    __ strd(v13,     d13_save);
-    __ strd(v14,     d14_save);
-    __ strd(v15,     d15_save);
+    __ stp(c_rarg4, c_rarg5,  entry_point);
+    __ stp(c_rarg2, c_rarg3,  result_type);
+    __ stp(c_rarg0, c_rarg1,  call_wrapper);
+
+    __ stp(r20, r19,   r20_save);
+    __ stp(r22, r21,   r22_save);
+    __ stp(r24, r23,   r24_save);
+    __ stp(r26, r25,   r26_save);
+    __ stp(r28, r27,   r28_save);
+
+    __ stpd(v9,  v8,   d9_save);
+    __ stpd(v11, v10,  d11_save);
+    __ stpd(v13, v12,  d13_save);
+    __ stpd(v15, v14,  d15_save);
 
     // install Java thread in global register now we have saved
     // whatever value it held
@@ -385,33 +374,22 @@
 #endif
 
     // restore callee-save registers
-    __ ldrd(v15,      d15_save);
-    __ ldrd(v14,      d14_save);
-    __ ldrd(v13,      d13_save);
-    __ ldrd(v12,      d12_save);
-    __ ldrd(v11,      d11_save);
-    __ ldrd(v10,      d10_save);
-    __ ldrd(v9,       d9_save);
-    __ ldrd(v8,       d8_save);
-
-    __ ldr(r28,      r28_save);
-    __ ldr(r27,      r27_save);
-    __ ldr(r26,      r26_save);
-    __ ldr(r25,      r25_save);
-    __ ldr(r24,      r24_save);
-    __ ldr(r23,      r23_save);
-    __ ldr(r22,      r22_save);
-    __ ldr(r21,      r21_save);
-    __ ldr(r20,      r20_save);
-    __ ldr(r19,      r19_save);
-    __ ldr(c_rarg0,  call_wrapper);
-    __ ldr(c_rarg1,  result);
+    __ ldpd(v15, v14,  d15_save);
+    __ ldpd(v13, v12,  d13_save);
+    __ ldpd(v11, v10,  d11_save);
+    __ ldpd(v9,  v8,   d9_save);
+
+    __ ldp(r28, r27,   r28_save);
+    __ ldp(r26, r25,   r26_save);
+    __ ldp(r24, r23,   r24_save);
+    __ ldp(r22, r21,   r22_save);
+    __ ldp(r20, r19,   r20_save);
+
+    __ ldp(c_rarg0, c_rarg1,  call_wrapper);
     __ ldrw(c_rarg2, result_type);
     __ ldr(c_rarg3,  method);
-    __ ldr(c_rarg4,  entry_point);
-    __ ldr(c_rarg5,  parameters);
-    __ ldr(c_rarg6,  parameter_size);
-    __ ldr(c_rarg7,  thread);
+    __ ldp(c_rarg4, c_rarg5,  entry_point);
+    __ ldp(c_rarg6, c_rarg7,  parameter_size);
 
 #ifndef PRODUCT
     // tell the simulator we are about to end Java execution