Added new 68000 cpu core based on UAE's 68000. Here be dragons. ;-)

[virtualjaguar] / src / m68000 / cpudefs.h

diff --git a/src/m68000/cpudefs.h b/src/m68000/cpudefs.h
new file mode 100644 (file)
index 0000000..191057f
--- /dev/null
+++ b/src/m68000/cpudefs.h
@@ -0,0 +1,97 @@
+//
+// Common definitions for the UAE 68000 core
+//
+// by James Hammons
+// (C) 2011 Underground Software
+//
+// This file is distributed under the GNU Public License, version 3 or at your
+// option any later version. Read the file GPLv3 for details.
+//
+
+#ifndef __CPUDEFS_H__
+#define __CPUDEFS_H__
+
+#include "sysdeps.h"
+
+/* Special flags */
+#define SPCFLAG_DEBUGGER      0x001
+#define SPCFLAG_STOP          0x002
+#define SPCFLAG_BUSERROR      0x004
+#define SPCFLAG_INT           0x008
+#define SPCFLAG_BRK           0x010
+#define SPCFLAG_EXTRA_CYCLES  0x020
+#define SPCFLAG_TRACE         0x040
+#define SPCFLAG_DOTRACE       0x080
+#define SPCFLAG_DOINT         0x100
+#define SPCFLAG_MFP           0x200
+#define SPCFLAG_EXEC          0x400
+#define SPCFLAG_MODE_CHANGE   0x800
+
+struct regstruct
+{
+       uint32_t regs[16];
+       uint32_t usp, isp;
+       uint16_t sr;
+       uint8_t s;
+       uint8_t stopped;
+       int intmask;
+       int intLevel;
+
+       unsigned int c;
+       unsigned int z;
+       unsigned int n;
+       unsigned int v; 
+       unsigned int x;
+
+       uint32_t pc;
+       uint8_t * pc_p;
+       uint8_t * pc_oldp;
+
+       uint32_t spcflags;
+
+       uint32_t prefetch_pc;
+       uint32_t prefetch;
+
+       int32_t remainingCycles;
+       uint32_t interruptCycles;
+};
+
+extern struct regstruct regs, lastint_regs;
+
+#define m68k_dreg(r, num) ((r).regs[(num)])
+#define m68k_areg(r, num) (((r).regs + 8)[(num)])
+
+#define ZFLG (regs.z)
+#define NFLG (regs.n)
+#define CFLG (regs.c)
+#define VFLG (regs.v)
+#define XFLG (regs.x)
+
+/* Possible exceptions sources for M68000_Exception() and Exception() */
+#define M68000_EXC_SRC_CPU      1  /* Direct CPU exception */
+#define M68000_EXC_SRC_AUTOVEC  2  /* Auto-vector exception (e.g. VBL) */
+//#define M68000_EXC_SRC_INT_MFP  3  /* MFP interrupt exception */
+//#define M68000_EXC_SRC_INT_DSP  4  /* DSP interrupt exception */
+
+#define SET_CFLG(x) (CFLG = (x))
+#define SET_NFLG(x) (NFLG = (x))
+#define SET_VFLG(x) (VFLG = (x))
+#define SET_ZFLG(x) (ZFLG = (x))
+#define SET_XFLG(x) (XFLG = (x))
+
+#define GET_CFLG CFLG
+#define GET_NFLG NFLG
+#define GET_VFLG VFLG
+#define GET_ZFLG ZFLG
+#define GET_XFLG XFLG
+
+#define CLEAR_CZNV do { \
+ SET_CFLG(0); \
+ SET_ZFLG(0); \
+ SET_NFLG(0); \
+ SET_VFLG(0); \
+} while (0)
+
+#define COPY_CARRY (SET_XFLG(GET_CFLG))
+
+#endif // __CPUDEFS_H__