Merge pull request #1587 from davidgfnet/master

Minor improvements for ARMv8

core/rec-ARM64/rec_arm64.cpp

@@ -1420,9 +1420,12 @@ class Arm64Assembler : public MacroAssembler
 	std::vector<const VRegister*> call_fregs;
 	Arm64RegAlloc regalloc;
 	RuntimeBlockInfo* block;
+	const int write_memory_rewrite_size = 3;  // same size (fast write) for any size: add, bfc, str
+	#ifdef EXPLODE_SPANS
 	const int read_memory_rewrite_size = 6;	// worst case for u64: add, bfc, ldr, fmov, lsr, fmov
-											// FIXME rewrite size per read/write size?
-	const int write_memory_rewrite_size = 3;
+	#else
+	const int read_memory_rewrite_size = 4;	// worst case for u64: add, bfc, ldr, str
+	#endif
 };
 
 static Arm64Assembler* compiler;

shell/linux/Makefile

@@ -46,6 +46,7 @@ ifeq (,$(platform))
     else ifeq ($(ARCH), $(filter $(ARCH), x86_64 AMD64 amd64))
         platform = x64
     else ifneq (,$(findstring aarch64,$(ARCH)))
+        platform = arm64
         HARDWARE = $(shell grep Hardware /proc/cpuinfo)
         ifneq (,$(findstring Vero4K,$(HARDWARE)))
             platform = vero4k
@@ -123,6 +124,15 @@ else ifneq (,$(findstring x64,$(platform)))
         HAS_SOFTREND := 1
     endif
 
+# Generic 64 bit ARM (armv8) Linux
+else ifneq (,$(findstring arm64,$(platform)))
+    NOT_ARM := 1
+    USE_X11 := 1
+    ARM64_REC := 1
+    ISARM64 := 1
+    CFLAGS += -D TARGET_LINUX_ARMv8 -D TARGET_NO_AREC -fno-builtin-sqrtf
+    CXXFLAGS += -fexceptions
+
 # Generic 32 bit ARMhf (a.k.a. ARMv7h)
 else ifneq (,$(findstring armv7h,$(platform)))
     MFLAGS += -marm -mfloat-abi=hard -march=armv7-a -funroll-loops