First draft of the sh4 port

src/globals.h

Index: src/globals.h
diff --git a/src/globals.h b/src/globals.h
index babffbf659882cab9c928dfe2f62116a9b376894..cb71ef2fc6881efdb135772efae8dfe07302e1fb 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -86,6 +86,9 @@ namespace internal {
 #elif defined(__MIPSEL__)
 #define V8_HOST_ARCH_MIPS 1
 #define V8_HOST_ARCH_32_BIT 1
+#elif defined(__SH4__)
+#define V8_HOST_ARCH_SH4 1
+#define V8_HOST_ARCH_32_BIT 1
 #else
 #error Host architecture was not detected as supported by v8
 #endif
@@ -94,7 +97,8 @@ namespace internal {
 // in the same way as the host architecture, that is, target the native
 // environment as presented by the compiler.
 #if !defined(V8_TARGET_ARCH_X64) && !defined(V8_TARGET_ARCH_IA32) && \
-    !defined(V8_TARGET_ARCH_ARM) && !defined(V8_TARGET_ARCH_MIPS)
+    !defined(V8_TARGET_ARCH_ARM) && !defined(V8_TARGET_ARCH_MIPS) && \
+    !defined(V8_TARGET_ARCH_SH4)
 #if defined(_M_X64) || defined(__x86_64__)
 #define V8_TARGET_ARCH_X64 1
 #elif defined(_M_IX86) || defined(__i386__)
@@ -103,6 +107,8 @@ namespace internal {
 #define V8_TARGET_ARCH_ARM 1
 #elif defined(__MIPSEL__)
 #define V8_TARGET_ARCH_MIPS 1
+#elif defined(__SH4__)
+#define V8_TARGET_ARCH_SH4 1
 #else
 #error Target architecture was not detected as supported by v8
 #endif
@@ -123,6 +129,10 @@ namespace internal {
     !(defined(V8_HOST_ARCH_IA32) || defined(V8_HOST_ARCH_MIPS)))
 #error Target architecture mips is only supported on mips and ia32 host
 #endif
+#if defined(V8_TARGET_ARCH_SH4) && !defined(V8_HOST_ARCH_SH4)
+#error Target architecture sh4 is only supported on sh4 host

[Jakob Kummerow, 2012/11/07 11:18:24]

How about adding a simulator to allow development/testing on x86 hardware? :-)

[remi.duraffort, 2012/11/07 11:59:26]

This is not planned as we use Qemu user mode along with a open source tool that
we developed (www.proot.me) to run every validation and tests of v8 for sh4 on
an x86 host. (I can show you the right command line if you are interested as it
also work for ARM).

+#endif
+
 
 // Determine whether we are running in a simulated environment.
 // Setting USE_SIMULATOR explicitly from the build script will force