S390: Initial impl of turbofan compiler

src/compiler/c-linkage.cc

Index: src/compiler/c-linkage.cc
diff --git a/src/compiler/c-linkage.cc b/src/compiler/c-linkage.cc
index 783d9d6da38bd163c837128f7062e4ed263dfebd..5fddc4c62886442041d8f979f70498cbc73b5b3b 100644
--- a/src/compiler/c-linkage.cc
+++ b/src/compiler/c-linkage.cc
@@ -123,6 +123,26 @@ LinkageLocation regloc(Register reg) {
       d20.bit() | d21.bit() | d22.bit() | d23.bit() | d24.bit() | d25.bit() | \
       d26.bit() | d27.bit() | d28.bit() | d29.bit() | d30.bit() | d31.bit()
 
+#elif V8_TARGET_ARCH_S390X
+// ===========================================================================
+// == s390x ==================================================================
+// ===========================================================================
+#define PARAM_REGISTERS r2, r3, r4, r5, r6
+#define CALLEE_SAVE_REGISTERS \
+  r6.bit() | r7.bit() | r8.bit() | r9.bit() | r10.bit() | ip.bit() | r13.bit()
+#define CALLEE_SAVE_FP_REGISTERS                                        \
+  d8.bit() | d9.bit() | d10.bit() | d11.bit() | d12.bit() | d13.bit() | \
+      d14.bit() | d15.bit()
+
+#elif V8_TARGET_ARCH_S390
+// ===========================================================================
+// == s390 ===================================================================
+// ===========================================================================
+#define PARAM_REGISTERS r2, r3, r4, r5, r6
+#define CALLEE_SAVE_REGISTERS \
+  r6.bit() | r7.bit() | r8.bit() | r9.bit() | r10.bit() | ip.bit() | r13.bit()
+#define CALLEE_SAVE_FP_REGISTERS (d4.bit() | d6.bit())
+
 #else
 // ===========================================================================
 // == unknown ================================================================