1 files changed, 72 insertions, 0 deletions
diff --git a/src/devices/cpu/dspp/dsppfe.h b/src/devices/cpu/dspp/dsppfe.h
new file mode 100644
index 00000000000..a90dc5d0225
--- /dev/null
+++ b/src/devices/cpu/dspp/dsppfe.h
@@ -0,0 +1,72 @@
+// license:BSD-3-Clause
+// copyright-holders:Philip Bennett
+/***************************************************************************
+
+    dsppfe.h
+
+    Front-end for DSPP recompiler
+
+***************************************************************************/
+
+#ifndef DEVICES_CPU_DSPP_DSPPFE_H
+#define DEVICES_CPU_DSPP_DSPPFE_H
+
+#include "dspp.h"
+#include "cpu/drcfe.h"
+
+
+//**************************************************************************
+//  MACROS
+//**************************************************************************
+
+// register flags 0
+#define REGFLAG_R(n)                    (1 << (n))
+#define REGFLAG_RZ(n)                   (((n) == 0) ? 0 : REGFLAG_R(n))
+
+// register flags 1
+#define REGFLAG_FR(n)                   (1 << (n))
+
+// register flags 2
+#define REGFLAG_CR(n)                   (0xf0000000 >> (4 * (n)))
+#define REGFLAG_CR_BIT(n)               (0x80000000 >> (n))
+
+// register flags 3
+#define REGFLAG_XER_CA                  (1 << 0)
+#define REGFLAG_XER_OV                  (1 << 1)
+#define REGFLAG_XER_SO                  (1 << 2)
+#define REGFLAG_XER_COUNT               (1 << 3)
+#define REGFLAG_CTR                     (1 << 4)
+#define REGFLAG_LR                      (1 << 5)
+#define REGFLAG_FPSCR(n)                (1 << (6 + (n)))
+
+
+
+//**************************************************************************
+//  TYPE DEFINITIONS
+//**************************************************************************
+
+class dspp_frontend : public drc_frontend
+{
+public:
+	// construction/destruction
+	dspp_frontend(dspp_device *dspp, uint32_t window_start, uint32_t window_end, uint32_t max_sequence);
+
+protected:
+	// required overrides
+	virtual bool describe(opcode_desc &desc, const opcode_desc *prev) override;
+
+private:
+	// inlines
+
+	// internal helpers
+	bool describe_special(uint16_t op, opcode_desc &desc);
+	bool describe_branch(uint16_t op, opcode_desc &desc);
+	bool describe_complex_branch(uint16_t op, opcode_desc &desc);
+	bool describe_arithmetic(uint16_t op, opcode_desc &desc);
+
+	// internal state
+	dspp_device *m_dspp;
+};
+
+
+#endif /* DEVICES_CPU_DSPP_DSPPFE_H */