# HG changeset patch
# User zgu
# Date 1595686613 14400
#      Sat Jul 25 10:16:53 2020 -0400
# Node ID cbf47177d14342a6829fb31205f27447de53e8f8
# Parent  d847a98a32cf0b4daefa57ee76d61106c5d6f0ea
8250588: Shenandoah: LRB needs to save/restore fp registers for runtime call

diff --git a/src/hotspot/cpu/x86/gc/shenandoah/shenandoahBarrierSetAssembler_x86.cpp b/src/hotspot/cpu/x86/gc/shenandoah/shenandoahBarrierSetAssembler_x86.cpp
--- a/src/hotspot/cpu/x86/gc/shenandoah/shenandoahBarrierSetAssembler_x86.cpp
+++ b/src/hotspot/cpu/x86/gc/shenandoah/shenandoahBarrierSetAssembler_x86.cpp
@@ -46,6 +46,30 @@
 
 address ShenandoahBarrierSetAssembler::_shenandoah_lrb = NULL;
 
+static void save_xmm_registers(MacroAssembler* masm) {
+    __ subptr(rsp, 64);
+    __ movdbl(Address(rsp, 0), xmm0);
+    __ movdbl(Address(rsp, 8), xmm1);
+    __ movdbl(Address(rsp, 16), xmm2);
+    __ movdbl(Address(rsp, 24), xmm3);
+    __ movdbl(Address(rsp, 32), xmm4);
+    __ movdbl(Address(rsp, 40), xmm5);
+    __ movdbl(Address(rsp, 48), xmm6);
+    __ movdbl(Address(rsp, 56), xmm7);
+}
+
+static void restore_xmm_registers(MacroAssembler* masm) {
+    __ movdbl(xmm0, Address(rsp, 0));
+    __ movdbl(xmm1, Address(rsp, 8));
+    __ movdbl(xmm2, Address(rsp, 16));
+    __ movdbl(xmm3, Address(rsp, 24));
+    __ movdbl(xmm4, Address(rsp, 32));
+    __ movdbl(xmm5, Address(rsp, 40));
+    __ movdbl(xmm6, Address(rsp, 48));
+    __ movdbl(xmm7, Address(rsp, 56));
+    __ addptr(rsp, 64);
+}
+
 void ShenandoahBarrierSetAssembler::arraycopy_prologue(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
                                                        Register src, Register dst, Register count) {
 
@@ -290,7 +314,9 @@
     __ lea(src_addr, src);
   }
 
+  save_xmm_registers(masm);
   __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, ShenandoahBarrierSetAssembler::shenandoah_lrb())));
+  restore_xmm_registers(masm);
 
   if (need_addr_setup) {
     if (dst != rax) {
@@ -368,7 +394,10 @@
 
   assert_different_registers(dst, rsi);
   __ lea(rsi, src);
+
+  save_xmm_registers(masm);
   __ call_VM_leaf(CAST_FROM_FN_PTR(address, ShenandoahRuntime::load_reference_barrier_native), dst, rsi);
+  restore_xmm_registers(masm);
 
 #ifdef _LP64
   __ pop(r15);
@@ -514,15 +543,7 @@
     // That path can be reached from the c2i adapter with live fp
     // arguments in registers.
     LP64_ONLY(assert(Argument::n_float_register_parameters_j == 8, "8 fp registers to save at java call"));
-    __ subptr(rsp, 64);
-    __ movdbl(Address(rsp, 0), xmm0);
-    __ movdbl(Address(rsp, 8), xmm1);
-    __ movdbl(Address(rsp, 16), xmm2);
-    __ movdbl(Address(rsp, 24), xmm3);
-    __ movdbl(Address(rsp, 32), xmm4);
-    __ movdbl(Address(rsp, 40), xmm5);
-    __ movdbl(Address(rsp, 48), xmm6);
-    __ movdbl(Address(rsp, 56), xmm7);
+    save_xmm_registers(masm);
 
     Register thread = NOT_LP64(tmp_thread) LP64_ONLY(r15_thread);
     assert_different_registers(dst, tmp1, tmp_thread);
@@ -539,15 +560,7 @@
                                  tmp1 /* tmp */,
                                  true /* tosca_live */,
                                  true /* expand_call */);
-    __ movdbl(xmm0, Address(rsp, 0));
-    __ movdbl(xmm1, Address(rsp, 8));
-    __ movdbl(xmm2, Address(rsp, 16));
-    __ movdbl(xmm3, Address(rsp, 24));
-    __ movdbl(xmm4, Address(rsp, 32));
-    __ movdbl(xmm5, Address(rsp, 40));
-    __ movdbl(xmm6, Address(rsp, 48));
-    __ movdbl(xmm7, Address(rsp, 56));
-    __ addptr(rsp, 64);
+    restore_xmm_registers(masm);
     __ pop_IU_state();
   }
 }