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-rw-r--r--src/devices/cpu/dspp/dsppfe.h72
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diff --git a/src/devices/cpu/dspp/dsppfe.h b/src/devices/cpu/dspp/dsppfe.h
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+++ b/src/devices/cpu/dspp/dsppfe.h
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+// 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 */