DUALNUM: Add build infrastructure.

Note: DUALNUM is disabled by default and won't work yet.

1 files changed, 12 insertions, 0 deletions

diff --git a/src/lj_arch.h b/src/lj_arch.h
index c728742f..5e866fe4 100644
--- a/src/lj_arch.h
+++ b/src/lj_arch.h
@@ -107,6 +107,7 @@
 #define LJ_TARGET_EHRETREG      0
 #define LJ_TARGET_MASKSHIFT     1
 #define LJ_TARGET_MASKROT       1
+#define LJ_ARCH_DUALNUM         1
 
 #elif LUAJIT_TARGET == LUAJIT_ARCH_X64
 
@@ -120,6 +121,7 @@
 #define LJ_TARGET_EHRETREG      0
 #define LJ_TARGET_MASKSHIFT     1
 #define LJ_TARGET_MASKROT       1
+#define LJ_ARCH_DUALNUM         1
 
 #elif LUAJIT_TARGET == LUAJIT_ARCH_ARM
 
@@ -134,6 +136,7 @@
 #define LJ_TARGET_EHRETREG      0
 #define LJ_TARGET_MASKSHIFT     0
 #define LJ_TARGET_MASKROT       1
+#define LJ_ARCH_DUALNUM         2
 #define LJ_ARCH_NOFFI           1
 #define LJ_ARCH_NOJIT           1
 
@@ -154,6 +157,7 @@
 #define LJ_TARGET_EHRETREG      3
 #define LJ_TARGET_MASKSHIFT     0
 #define LJ_TARGET_MASKROT       1
+#define LJ_ARCH_DUALNUM         0
 #define LJ_ARCH_NOFFI           1       /* NYI: comparisons, calls. */
 #define LJ_ARCH_NOJIT           1
 
@@ -207,6 +211,14 @@
 #endif
 #endif
 
+/* Enable or disable the dual-number VM. */
+#if LJ_ARCH_DUALNUM == 2 || \
+    (defined(LUAJIT_ENABLE_DUALNUM) && LJ_ARCH_DUALNUM == 1)
+#define LJ_DUALNUM              1
+#else
+#define LJ_DUALNUM              0
+#endif
+
 /* Disable or enable the JIT compiler. */
 #if defined(LUAJIT_DISABLE_JIT) || defined(LJ_ARCH_NOJIT)
 #define LJ_HASJIT               0