From: Rhys Weatherley <rweather@southern-storm.com.au>
Date: Tue, 1 Jun 2004 10:20:41 +0000 (+0000)
Subject: Enable the x86 back end by default on platforms where it makes sense,
X-Git-Tag: r.0.0.4~60
X-Git-Url: https://git.unchartedbackwaters.co.uk/w/?a=commitdiff_plain;h=3980ad081d326d76e01c10adf59ded63aa81af2a;p=francis%2Flibjit.git

Enable the x86 back end by default on platforms where it makes sense,
and add the option "--enable-interpreter" to "configure".
---

diff --git a/ChangeLog b/ChangeLog
index d6167fd..436fa3c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -7,6 +7,10 @@
 	* jit/jit-rules-arm.c, jit/jit-rules-arm.sel: more instruction
 	selection rules for ARM.
 
+	* configure.in, jit/jit-rules.h: enable the x86 back end by
+	default on platforms where it makes sense, and add the option
+	"--enable-interpreter" to "configure".
+
 2004-05-31  Rhys Weatherley  <rweather@southern-storm.com.au>
 
 	* jit/jit-rules-x86.sel: optimize multiplications for x86.
diff --git a/configure.in b/configure.in
index fd1cc8d..0c2a8b5 100644
--- a/configure.in
+++ b/configure.in
@@ -51,6 +51,18 @@ case "$host" in
 esac
 AC_MSG_RESULT($platform_win32)
 
+dnl The "--enable-interpreter" option forces the use of the interpreter.
+AC_ARG_ENABLE(interpreter,
+[  --enable-interpreter    Enable the libjit interpreter],
+[case "${enableval}" in
+  yes) interp=true ;;
+  no)  interp=false ;;
+  *) AC_MSG_ERROR(bad value ${enableval} for --enable-interpreter) ;;
+esac],[interp=false])
+if test x$interp = xtrue; then
+	AC_DEFINE(USE_LIBJIT_INTERPRETER, 1, [Define if you want to use the libjit interpreter])
+fi
+
 dnl Checks for programs.
 AC_PROG_AWK
 AC_PROG_CC
diff --git a/jit/jit-rules.h b/jit/jit-rules.h
index 3bad408..f23ed9a 100644
--- a/jit/jit-rules.h
+++ b/jit/jit-rules.h
@@ -22,6 +22,7 @@
 #define	_JIT_RULES_H
 
 #include "jit-cache.h"
+#include <config.h>
 
 #ifdef	__cplusplus
 extern	"C" {
@@ -30,9 +31,17 @@ extern	"C" {
 /*
  * Determine which backend to use.
  */
-#define	JIT_BACKEND_INTERP		1
-/*#define	JIT_BACKEND_X86		1*/
+#if defined(USE_LIBJIT_INTERPRETER)
+	#define	JIT_BACKEND_INTERP		1
+	#define	JIT_HAVE_BACKEND		1
+#elif defined(__i386) || defined(__i386__) || defined(_M_IX86)
+	#define JIT_BACKEND_X86			1
+	#define	JIT_HAVE_BACKEND		1
+#endif
 /*#define	JIT_BACKEND_ARM		1*/
+#if !defined(JIT_HAVE_BACKEND)
+	#define	JIT_BACKEND_INTERP		1
+#endif
 
 /*
  * Information about a register.