1 files changed, 88 insertions, 0 deletions

diff --git a/src/lj_arch.h b/src/lj_arch.h
new file mode 100644
index 00000000..abdb5af9
--- /dev/null
+++ b/src/lj_arch.h
@@ -0,0 +1,88 @@
+/*
+** Target architecture selection.
+** Copyright (C) 2005-2009 Mike Pall. See Copyright Notice in luajit.h
+*/
+
+#ifndef _LJ_ARCH_H
+#define _LJ_ARCH_H
+
+#include "lua.h"
+
+
+/* Target endianess. */
+#define LUAJIT_LE       0
+#define LUAJIT_BE       1
+
+/* Target architectures. */
+#define LUAJIT_ARCH_X86         1
+#define LUAJIT_ARCH_x86         1
+#define LUAJIT_ARCH_X64         2
+#define LUAJIT_ARCH_x64         2
+
+
+/* Select native target if no target defined. */
+#ifndef LUAJIT_TARGET
+
+#if defined(__i386) || defined(__i386__) || defined(_M_IX86)
+#define LUAJIT_TARGET   LUAJIT_ARCH_X86
+#elif defined(__x86_64__) || defined(__x86_64) || defined(_M_X64) || defined(_M_AMD64)
+#define LUAJIT_TARGET   LUAJIT_ARCH_X64
+#else
+#error "No support for this architecture (yet)"
+#endif
+
+#endif
+
+/* Set target properties. */
+#if LUAJIT_TARGET == LUAJIT_ARCH_X86
+#define LJ_ARCH_NAME            "x86"
+#define LJ_ARCH_BITS            32
+#define LJ_ARCH_ENDIAN          LUAJIT_LE
+#define LJ_TARGET_X86           1
+#define LJ_TARGET_X86ORX64      1
+#define LJ_PAGESIZE             4096
+#elif LUAJIT_TARGET == LUAJIT_ARCH_X64
+#define LJ_ARCH_NAME            "x64"
+#define LJ_ARCH_BITS            64
+#define LJ_ARCH_ENDIAN          LUAJIT_LE
+#define LJ_TARGET_X64           1
+#define LJ_TARGET_X86ORX64      1
+#define LJ_PAGESIZE             4096
+#error "No support for x64 architecture (yet)"
+#else
+#error "No target architecture defined"
+#endif
+
+/* Disable or enable the JIT compiler. */
+#if defined(LUAJIT_DISABLE_JIT) || defined(LJ_ARCH_NOJIT)
+#define LJ_HASJIT               0
+#else
+#define LJ_HASJIT               1
+#endif
+
+#if LJ_ARCH_ENDIAN == LUAJIT_BE
+#define LJ_ENDIAN_SELECT(le, be)        be
+#define LJ_ENDIAN_LOHI(lo, hi)          hi lo
+#else
+#define LJ_ENDIAN_SELECT(le, be)        le
+#define LJ_ENDIAN_LOHI(lo, hi)          lo hi
+#endif
+
+#if LJ_ARCH_BITS == 32
+#define LJ_32                   1
+#define LJ_64                   0
+#elif LJ_ARCH_BITS == 64
+#define LJ_32                   0
+#define LJ_64                   1
+#else
+#error "Bad LJ_ARCH_BITS setting"
+#endif
+
+/* Whether target CPU masks the shift count by the operand length or not. */
+#if LJ_TARGET_X86ORX64
+#define LJ_TARGET_MASKEDSHIFT   1
+#else
+#define LJ_TARGET_MASKEDSHIFT   0
+#endif
+
+#endif