PPC: Cleanup ABI-specifc code.

src/ppc/assembler-ppc.h

Index: src/ppc/assembler-ppc.h
diff --git a/src/ppc/assembler-ppc.h b/src/ppc/assembler-ppc.h
index c0f946f4d3eb174587fef0fb73ecbc7722c06a5c..f7604d1609f71ed52b4bb403665b196e6dda6801 100644
--- a/src/ppc/assembler-ppc.h
+++ b/src/ppc/assembler-ppc.h
@@ -46,12 +46,18 @@
 #include "src/assembler.h"
 #include "src/ppc/constants-ppc.h"
 
-#define ABI_USES_FUNCTION_DESCRIPTORS \
-  (V8_HOST_ARCH_PPC && (V8_OS_AIX ||    \
-                      (V8_TARGET_ARCH_PPC64 && V8_TARGET_BIG_ENDIAN)))
+#if V8_HOST_ARCH_PPC && \
+    (V8_OS_AIX || (V8_TARGET_ARCH_PPC64 && V8_TARGET_BIG_ENDIAN))
+#define ABI_USES_FUNCTION_DESCRIPTORS 1
+#else
+#define ABI_USES_FUNCTION_DESCRIPTORS 0
+#endif
 
-#define ABI_PASSES_HANDLES_IN_REGS \
-  (!V8_HOST_ARCH_PPC || V8_OS_AIX || V8_TARGET_ARCH_PPC64)
+#if !V8_HOST_ARCH_PPC || V8_OS_AIX || V8_TARGET_ARCH_PPC64
+#define ABI_PASSES_HANDLES_IN_REGS 1
+#else
+#define ABI_PASSES_HANDLES_IN_REGS 0
+#endif
 
 #if !V8_HOST_ARCH_PPC || !V8_TARGET_ARCH_PPC64 || V8_TARGET_LITTLE_ENDIAN
 #define ABI_RETURNS_OBJECT_PAIRS_IN_REGS 1
@@ -66,9 +72,9 @@
 #endif
 
 #if !V8_HOST_ARCH_PPC || V8_OS_AIX || V8_TARGET_ARCH_PPC64
-#define ABI_TOC_REGISTER Register::kCode_r2
+#define ABI_TOC_REGISTER 2
 #else
-#define ABI_TOC_REGISTER Register::kCode_r13
+#define ABI_TOC_REGISTER 13
 #endif
 
 #define INSTR_AND_DATA_CACHE_COHERENCY LWSYNC