1 files changed, 124 insertions, 0 deletions
diff --git a/plugins/gme/Game_Music_Emu-0.5.2/gme/Kss_Cpu.h b/plugins/gme/Game_Music_Emu-0.5.2/gme/Kss_Cpu.h
new file mode 100644
index 00000000..6297d100
--- /dev/null
+++ b/plugins/gme/Game_Music_Emu-0.5.2/gme/Kss_Cpu.h
@@ -0,0 +1,124 @@
+// Z80 CPU emulator
+
+// Game_Music_Emu 0.5.2
+#ifndef KSS_CPU_H
+#define KSS_CPU_H
+
+#include "blargg_endian.h"
+
+typedef blargg_long cpu_time_t;
+
+// must be defined by caller
+void kss_cpu_out( class Kss_Cpu*, cpu_time_t, unsigned addr, int data );
+int  kss_cpu_in( class Kss_Cpu*, cpu_time_t, unsigned addr );
+void kss_cpu_write( class Kss_Cpu*, unsigned addr, int data );
+
+class Kss_Cpu {
+public:
+	typedef BOOST::uint8_t uint8_t;
+	
+	// Clear registers and map all pages to unmapped
+	void reset( void* unmapped_write, void const* unmapped_read );
+	
+	// Map memory. Start and size must be multiple of page_size.
+	enum { page_size = 0x2000 };
+	void map_mem( unsigned addr, blargg_ulong size, void* write, void const* read );
+	
+	// Map address to page
+	uint8_t* write( unsigned addr );
+	uint8_t const* read( unsigned addr );
+	
+	// Run until specified time is reached. Returns true if suspicious/unsupported
+	// instruction was encountered at any point during run.
+	bool run( cpu_time_t end_time );
+	
+	// Time of beginning of next instruction
+	cpu_time_t time() const             { return state->time + state->base; }
+	
+	// Alter current time. Not supported during run() call.
+	void set_time( cpu_time_t t )       { state->time = t - state->base; }
+	void adjust_time( int delta )       { state->time += delta; }
+	
+	typedef BOOST::uint16_t uint16_t;
+	
+	#if BLARGG_BIG_ENDIAN
+		struct regs_t { uint8_t b, c, d, e, h, l, flags, a; };
+	#else
+		struct regs_t { uint8_t c, b, e, d, l, h, a, flags; };
+	#endif
+	BOOST_STATIC_ASSERT( sizeof (regs_t) == 8 );
+	
+	struct pairs_t { uint16_t bc, de, hl, fa; };
+	
+	// Registers are not updated until run() returns
+	struct registers_t {
+		uint16_t pc;
+		uint16_t sp;
+		uint16_t ix;
+		uint16_t iy;
+		union {
+			regs_t b; //  b.b, b.c, b.d, b.e, b.h, b.l, b.flags, b.a
+			pairs_t w; // w.bc, w.de, w.hl. w.fa
+		};
+		union {
+			regs_t b;
+			pairs_t w;
+		} alt;
+		uint8_t iff1;
+		uint8_t iff2;
+		uint8_t r;
+		uint8_t i;
+		uint8_t im;
+	};
+	//registers_t r; (below for efficiency)
+	
+	enum { idle_addr = 0xFFFF };
+	
+	// can read this far past end of a page
+	enum { cpu_padding = 0x100 };
+	
+public:
+	Kss_Cpu();
+	enum { page_shift = 13 };
+	enum { page_count = 0x10000 >> page_shift };
+private:
+	uint8_t szpc [0x200];
+	cpu_time_t end_time_;
+	struct state_t {
+		uint8_t const* read  [page_count + 1];
+		uint8_t      * write [page_count + 1];
+		cpu_time_t base;
+		cpu_time_t time;
+	};
+	state_t* state; // points to state_ or a local copy within run()
+	state_t state_;
+	void set_end_time( cpu_time_t t );
+	void set_page( int i, void* write, void const* read );
+public:
+	registers_t r;
+};
+
+#if BLARGG_NONPORTABLE
+	#define KSS_CPU_PAGE_OFFSET( addr ) (addr)
+#else
+	#define KSS_CPU_PAGE_OFFSET( addr ) ((addr) & (page_size - 1))
+#endif
+
+inline BOOST::uint8_t* Kss_Cpu::write( unsigned addr )
+{
+	return state->write [addr >> page_shift] + KSS_CPU_PAGE_OFFSET( addr );
+}
+
+inline BOOST::uint8_t const* Kss_Cpu::read( unsigned addr )
+{
+	return state->read [addr >> page_shift] + KSS_CPU_PAGE_OFFSET( addr );
+}
+
+inline void Kss_Cpu::set_end_time( cpu_time_t t )
+{
+	cpu_time_t delta = state->base - t;
+	state->base = t;
+	state->time += delta;
+}
+
+#endif