Something to help our porting of code from assembly to C.

zsnes/src/asm_call.h

@@ -0,0 +1,68 @@
+/*
+Copyright (C) 1997-2005 ZSNES Team ( zsKnight, _Demo_, pagefault, Nach )
+
+http://www.zsnes.com
+http://sourceforge.net/projects/zsnes
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+
+/*
+Introducing 'the "DJGPP/MinGW/MSVC/GCC on *nix compatible" call asm function 
+safely from C/C++' macro function!
+
+Usage:
+       asm_call( func_name );
+       
+That's all there is to it!!!
+
+Note: This will not work with GCC when using the parameter -MASM=intel
+I'd fix that if anyone knows if that parameter defines something I can check
+
+-Nach
+*/
+
+#ifndef ASM_CALL_H
+#define ASM_CALL_H
+////////////////////////////////////////////////////////
+
+#ifdef __GNUC__
+
+#define ASM_COMMAND(line) #line"\n\t"
+
+#ifdef __LINUX__
+#define ASM_CALL(func) ASM_COMMAND(call func)
+#else
+#define ASM_CALL(func) ASM_COMMAND(call _ ## func)
+#endif
+
+#define asm_call(func) __asm__ __volatile__ ( \
+ASM_COMMAND(pushal) \
+ASM_CALL(func) \
+ASM_COMMAND(popal) \
+);
+
+#else //MSVC
+
+#define asm_call(func) _asm pushad \
+_asm call func \
+_asm popad
+
+#endif
+
+////////////////////////////////////////////////////////
+#endif