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+/***************************************************************************
+
+ ppcfe.h
+
+ Front-end for PowerPC recompiler
+
+****************************************************************************
+
+ Copyright Aaron Giles
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are
+ met:
+
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in
+ the documentation and/or other materials provided with the
+ distribution.
+ * Neither the name 'MAME' nor the names of its contributors may be
+ used to endorse or promote products derived from this software
+ without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY AARON GILES ''AS IS'' AND ANY EXPRESS OR
+ IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL AARON GILES BE LIABLE FOR ANY DIRECT,
+ INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ POSSIBILITY OF SUCH DAMAGE.
+
+***************************************************************************/
+
+#ifndef __PPCFE_H__
+#define __PPCFE_H__
+
+#include "ppccom.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 ppc_frontend : public drc_frontend
+{
+public:
+ // construction/destruction
+ ppc_frontend(powerpc_state &state, UINT32 window_start, UINT32 window_end, UINT32 max_sequence);
+
+protected:
+ // required overrides
+ virtual bool describe(opcode_desc &desc, const opcode_desc *prev);
+
+private:
+ // inlines
+ UINT32 compute_spr(UINT32 spr) const { return ((spr >> 5) | (spr << 5)) & 0x3ff; }
+ bool is_403_class() const { return (m_context.flavor == PPC_MODEL_403GA || m_context.flavor == PPC_MODEL_403GB || m_context.flavor == PPC_MODEL_403GC || m_context.flavor == PPC_MODEL_403GCX || m_context.flavor == PPC_MODEL_405GP); }
+ bool is_601_class() const { return (m_context.flavor == PPC_MODEL_601); }
+ bool is_602_class() const { return (m_context.flavor == PPC_MODEL_602); }
+ bool is_603_class() const { return (m_context.flavor == PPC_MODEL_603 || m_context.flavor == PPC_MODEL_603E || m_context.flavor == PPC_MODEL_603EV || m_context.flavor == PPC_MODEL_603R); }
+
+ // internal helpers
+ bool describe_13(UINT32 op, opcode_desc &desc, const opcode_desc *prev);
+ bool describe_1f(UINT32 op, opcode_desc &desc, const opcode_desc *prev);
+ bool describe_3b(UINT32 op, opcode_desc &desc, const opcode_desc *prev);
+ bool describe_3f(UINT32 op, opcode_desc &desc, const opcode_desc *prev);
+
+ // internal state
+ powerpc_state &m_context;
+};
+
+
+#endif /* __PPCFE_H__ */