commit 9bd88b0933a372e6a7b64b850868e6a7998567e2
author Serban Constantinescu <serban.constantinescu@linaro.org> Wed Apr 22 16:24:46 2015 +0100
committer Alexandre Rames <alexandre.rames@linaro.org> Fri May 22 12:01:07 2015 +0100
tree bcd275674c1234842b757ea8e100c4030f9ac6fe
parent 01cb410f4ad23135671d821ba36c269f8c82affa

ARM64: Move xSELF from x18 to x19.

This patch moves xSELF to callee saved x19 and removes support for
ETR (external thread register), previously used across native calls.

Change-Id: Icee07fbb9292425947f7de33d10a0ddf98c7899b
Signed-off-by: Serban Constantinescu <serban.constantinescu@linaro.org>

compiler/optimizing/code_generator_arm64.h

diff --git a/compiler/optimizing/code_generator_arm64.h b/compiler/optimizing/code_generator_arm64.h
index b56ca10..ab793a5 100644
--- a/compiler/optimizing/code_generator_arm64.h
+++ b/compiler/optimizing/code_generator_arm64.h
@@ -44,7 +44,7 @@
 };
 static constexpr size_t kParameterFPRegistersLength = arraysize(kParameterFPRegisters);
 
-const vixl::Register tr = vixl::x18;                        // Thread Register
+const vixl::Register tr = vixl::x19;                        // Thread Register
 static const vixl::Register kArtMethodRegister = vixl::w0;  // Method register on invoke.
 
 const vixl::CPURegList vixl_reserved_core_registers(vixl::ip0, vixl::ip1);
@@ -52,10 +52,10 @@
 
 const vixl::CPURegList runtime_reserved_core_registers(tr, vixl::lr);
 
-// Callee-saved registers defined by AAPCS64.
+// Callee-saved registers AAPCS64 (without x19 - Thread Register)
 const vixl::CPURegList callee_saved_core_registers(vixl::CPURegister::kRegister,
                                                    vixl::kXRegSize,
-                                                   vixl::x19.code(),
+                                                   vixl::x20.code(),
                                                    vixl::x30.code());
 const vixl::CPURegList callee_saved_fp_registers(vixl::CPURegister::kFPRegister,
                                                  vixl::kDRegSize,