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Diffstat (limited to 'plugins/gme/game-music-emu-0.6.0/gme/Kss_Cpu.cpp')
-rw-r--r--plugins/gme/game-music-emu-0.6.0/gme/Kss_Cpu.cpp1706
1 files changed, 1706 insertions, 0 deletions
diff --git a/plugins/gme/game-music-emu-0.6.0/gme/Kss_Cpu.cpp b/plugins/gme/game-music-emu-0.6.0/gme/Kss_Cpu.cpp
new file mode 100644
index 00000000..dac483c1
--- /dev/null
+++ b/plugins/gme/game-music-emu-0.6.0/gme/Kss_Cpu.cpp
@@ -0,0 +1,1706 @@
+// Game_Music_Emu 0.5.5. http://www.slack.net/~ant/
+
+/*
+Last validated with zexall 2006.11.14 2:19 PM
+* Doesn't implement the R register or immediate interrupt after EI.
+* Address wrap-around isn't completely correct, but is prevented from crashing emulator.
+*/
+
+#include "Kss_Cpu.h"
+
+#include "blargg_endian.h"
+#include <string.h>
+
+//#include "z80_cpu_log.h"
+
+/* Copyright (C) 2006 Shay Green. This module is free software; you
+can redistribute it and/or modify it under the terms of the GNU Lesser
+General Public License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version. This
+module is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
+details. You should have received a copy of the GNU Lesser General Public
+License along with this module; if not, write to the Free Software Foundation,
+Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
+
+#define SYNC_TIME() (void) (s.time = s_time)
+#define RELOAD_TIME() (void) (s_time = s.time)
+
+// Callbacks to emulator
+
+#define CPU_OUT( cpu, addr, data, time )\
+ kss_cpu_out( this, time, addr, data )
+
+#define CPU_IN( cpu, addr, time )\
+ kss_cpu_in( this, time, addr )
+
+#define CPU_WRITE( cpu, addr, data, time )\
+ (SYNC_TIME(), kss_cpu_write( this, addr, data ))
+
+#include "blargg_source.h"
+
+// flags, named with hex value for clarity
+int const S80 = 0x80;
+int const Z40 = 0x40;
+int const F20 = 0x20;
+int const H10 = 0x10;
+int const F08 = 0x08;
+int const V04 = 0x04;
+int const P04 = 0x04;
+int const N02 = 0x02;
+int const C01 = 0x01;
+
+#define SZ28P( n ) szpc [n]
+#define SZ28PC( n ) szpc [n]
+#define SZ28C( n ) (szpc [n] & ~P04)
+#define SZ28( n ) SZ28C( n )
+
+#define SET_R( n ) (void) (r.r = n)
+#define GET_R() (r.r)
+
+Kss_Cpu::Kss_Cpu()
+{
+ state = &state_;
+
+ for ( int i = 0x100; --i >= 0; )
+ {
+ int even = 1;
+ for ( int p = i; p; p >>= 1 )
+ even ^= p;
+ int n = (i & (S80 | F20 | F08)) | ((even & 1) * P04);
+ szpc [i] = n;
+ szpc [i + 0x100] = n | C01;
+ }
+ szpc [0x000] |= Z40;
+ szpc [0x100] |= Z40;
+}
+
+inline void Kss_Cpu::set_page( int i, void* write, void const* read )
+{
+ blargg_long offset = KSS_CPU_PAGE_OFFSET( i * (blargg_long) page_size );
+ state->write [i] = (byte *) write - offset;
+ state->read [i] = (byte const*) read - offset;
+}
+
+void Kss_Cpu::reset( void* unmapped_write, void const* unmapped_read )
+{
+ check( state == &state_ );
+ state = &state_;
+ state_.time = 0;
+ state_.base = 0;
+ end_time_ = 0;
+
+ for ( int i = 0; i < page_count + 1; i++ )
+ set_page( i, unmapped_write, unmapped_read );
+
+ memset( &r, 0, sizeof r );
+}
+
+void Kss_Cpu::map_mem( unsigned addr, blargg_ulong size, void* write, void const* read )
+{
+ // address range must begin and end on page boundaries
+ require( addr % page_size == 0 );
+ require( size % page_size == 0 );
+
+ unsigned first_page = addr / page_size;
+ for ( unsigned i = size / page_size; i--; )
+ {
+ blargg_long offset = i * (blargg_long) page_size;
+ set_page( first_page + i, (byte*) write + offset, (byte const*) read + offset );
+ }
+}
+
+#define TIME (s_time + s.base)
+#define RW_MEM( addr, rw ) (s.rw [(addr) >> page_shift] [KSS_CPU_PAGE_OFFSET( addr )])
+#define READ_PROG( addr ) RW_MEM( addr, read )
+#define READ( addr ) READ_PROG( addr )
+//#define WRITE( addr, data ) (void) (RW_MEM( addr, write ) = data)
+#define WRITE( addr, data ) CPU_WRITE( this, addr, data, TIME )
+#define READ_WORD( addr ) GET_LE16( &READ( addr ) )
+#define WRITE_WORD( addr, data ) SET_LE16( &RW_MEM( addr, write ), data )
+#define IN( addr ) CPU_IN( this, addr, TIME )
+#define OUT( addr, data ) CPU_OUT( this, addr, data, TIME )
+
+#if BLARGG_BIG_ENDIAN
+ #define R8( n, offset ) ((r8_ - offset) [n])
+#elif BLARGG_LITTLE_ENDIAN
+ #define R8( n, offset ) ((r8_ - offset) [(n) ^ 1])
+#else
+ #error "Byte order of CPU must be known"
+#endif
+
+//#define R16( n, shift, offset ) (r16_ [((n) >> shift) - (offset >> shift)])
+
+// help compiler see that it can just adjust stack offset, saving an extra instruction
+#define R16( n, shift, offset )\
+ (*(uint16_t*) ((char*) r16_ - (offset >> (shift - 1)) + ((n) >> (shift - 1))))
+
+#define CASE5( a, b, c, d, e ) case 0x##a:case 0x##b:case 0x##c:case 0x##d:case 0x##e
+#define CASE6( a, b, c, d, e, f ) CASE5( a, b, c, d, e ): case 0x##f
+#define CASE7( a, b, c, d, e, f, g ) CASE6( a, b, c, d, e, f ): case 0x##g
+#define CASE8( a, b, c, d, e, f, g, h ) CASE7( a, b, c, d, e, f, g ): case 0x##h
+
+// high four bits are $ED time - 8, low four bits are $DD/$FD time - 8
+static byte const ed_dd_timing [0x100] = {
+//0 1 2 3 4 5 6 7 8 9 A B C D E F
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x07,0x00,0x00,0x00,0x00,0x00,0x00,
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x07,0x00,0x00,0x00,0x00,0x00,0x00,
+0x00,0x06,0x0C,0x02,0x00,0x00,0x03,0x00,0x00,0x07,0x0C,0x02,0x00,0x00,0x03,0x00,
+0x00,0x00,0x00,0x00,0x0F,0x0F,0x0B,0x00,0x00,0x07,0x00,0x00,0x00,0x00,0x00,0x00,
+0x40,0x40,0x70,0xC0,0x00,0x60,0x0B,0x10,0x40,0x40,0x70,0xC0,0x00,0x60,0x0B,0x10,
+0x40,0x40,0x70,0xC0,0x00,0x60,0x0B,0x10,0x40,0x40,0x70,0xC0,0x00,0x60,0x0B,0x10,
+0x40,0x40,0x70,0xC0,0x00,0x60,0x0B,0xA0,0x40,0x40,0x70,0xC0,0x00,0x60,0x0B,0xA0,
+0x4B,0x4B,0x7B,0xCB,0x0B,0x6B,0x00,0x0B,0x40,0x40,0x70,0xC0,0x00,0x60,0x0B,0x00,
+0x00,0x00,0x00,0x00,0x00,0x00,0x0B,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0B,0x00,
+0x00,0x00,0x00,0x00,0x00,0x00,0x0B,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0B,0x00,
+0x80,0x80,0x80,0x80,0x00,0x00,0x0B,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x0B,0x00,
+0xD0,0xD0,0xD0,0xD0,0x00,0x00,0x0B,0x00,0xD0,0xD0,0xD0,0xD0,0x00,0x00,0x0B,0x00,
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0x00,0x00,0x00,0x00,
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+0x00,0x06,0x00,0x0F,0x00,0x07,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x00,0x00,0x00,0x00,0x00,0x00,
+};
+
+// even on x86, using short and unsigned char was slower
+typedef int fint16;
+typedef unsigned fuint16;
+typedef unsigned fuint8;
+
+bool Kss_Cpu::run( cpu_time_t end_time )
+{
+ set_end_time( end_time );
+ state_t s = this->state_;
+ this->state = &s;
+ bool warning = false;
+
+ typedef BOOST::int8_t int8_t;
+
+ union {
+ regs_t rg;
+ pairs_t rp;
+ uint8_t r8_ [8]; // indexed
+ uint16_t r16_ [4];
+ };
+ rg = this->r.b;
+
+ cpu_time_t s_time = s.time;
+ fuint16 pc = r.pc;
+ fuint16 sp = r.sp;
+ fuint16 ix = r.ix; // TODO: keep in memory for direct access?
+ fuint16 iy = r.iy;
+ int flags = r.b.flags;
+
+ goto loop;
+jr_not_taken:
+ s_time -= 5;
+ goto loop;
+call_not_taken:
+ s_time -= 7;
+jp_not_taken:
+ pc += 2;
+loop:
+
+ check( (unsigned long) pc < 0x10000 );
+ check( (unsigned long) sp < 0x10000 );
+ check( (unsigned) flags < 0x100 );
+ check( (unsigned) ix < 0x10000 );
+ check( (unsigned) iy < 0x10000 );
+
+ uint8_t const* instr = s.read [pc >> page_shift];
+#define GET_ADDR() GET_LE16( instr )
+
+ fuint8 opcode;
+
+ // TODO: eliminate this special case
+ #if BLARGG_NONPORTABLE
+ opcode = instr [pc];
+ pc++;
+ instr += pc;
+ #else
+ instr += KSS_CPU_PAGE_OFFSET( pc );
+ opcode = *instr++;
+ pc++;
+ #endif
+
+ static byte const base_timing [0x100] = {
+ // 0 1 2 3 4 5 6 7 8 9 A B C D E F
+ 4,10, 7, 6, 4, 4, 7, 4, 4,11, 7, 6, 4, 4, 7, 4, // 0
+ 13,10, 7, 6, 4, 4, 7, 4,12,11, 7, 6, 4, 4, 7, 4, // 1
+ 12,10,16, 6, 4, 4, 7, 4,12,11,16, 6, 4, 4, 7, 4, // 2
+ 12,10,13, 6,11,11,10, 4,12,11,13, 6, 4, 4, 7, 4, // 3
+ 4, 4, 4, 4, 4, 4, 7, 4, 4, 4, 4, 4, 4, 4, 7, 4, // 4
+ 4, 4, 4, 4, 4, 4, 7, 4, 4, 4, 4, 4, 4, 4, 7, 4, // 5
+ 4, 4, 4, 4, 4, 4, 7, 4, 4, 4, 4, 4, 4, 4, 7, 4, // 6
+ 7, 7, 7, 7, 7, 7, 4, 7, 4, 4, 4, 4, 4, 4, 7, 4, // 7
+ 4, 4, 4, 4, 4, 4, 7, 4, 4, 4, 4, 4, 4, 4, 7, 4, // 8
+ 4, 4, 4, 4, 4, 4, 7, 4, 4, 4, 4, 4, 4, 4, 7, 4, // 9
+ 4, 4, 4, 4, 4, 4, 7, 4, 4, 4, 4, 4, 4, 4, 7, 4, // A
+ 4, 4, 4, 4, 4, 4, 7, 4, 4, 4, 4, 4, 4, 4, 7, 4, // B
+ 11,10,10,10,17,11, 7,11,11,10,10, 8,17,17, 7,11, // C
+ 11,10,10,11,17,11, 7,11,11, 4,10,11,17, 8, 7,11, // D
+ 11,10,10,19,17,11, 7,11,11, 4,10, 4,17, 8, 7,11, // E
+ 11,10,10, 4,17,11, 7,11,11, 6,10, 4,17, 8, 7,11, // F
+ };
+
+ fuint16 data;
+ data = base_timing [opcode];
+ if ( (s_time += data) >= 0 )
+ goto possibly_out_of_time;
+almost_out_of_time:
+
+ data = READ_PROG( pc );
+
+ #ifdef Z80_CPU_LOG_H
+ //log_opcode( opcode, READ_PROG( pc ) );
+ z80_log_regs( rg.a, rp.bc, rp.de, rp.hl, sp, ix, iy );
+ z80_cpu_log( "new", pc - 1, opcode, READ_PROG( pc ),
+ READ_PROG( pc + 1 ), READ_PROG( pc + 2 ) );
+ #endif
+
+ switch ( opcode )
+ {
+possibly_out_of_time:
+ if ( s_time < (int) data )
+ goto almost_out_of_time;
+ s_time -= data;
+ goto out_of_time;
+
+// Common
+
+ case 0x00: // NOP
+ CASE7( 40, 49, 52, 5B, 64, 6D, 7F ): // LD B,B etc.
+ goto loop;
+
+ case 0x08:{// EX AF,AF'
+ int temp = r.alt.b.a;
+ r.alt.b.a = rg.a;
+ rg.a = temp;
+
+ temp = r.alt.b.flags;
+ r.alt.b.flags = flags;
+ flags = temp;
+ goto loop;
+ }
+
+ case 0xD3: // OUT (imm),A
+ pc++;
+ OUT( data + rg.a * 0x100, rg.a );
+ goto loop;
+
+ case 0x2E: // LD L,imm
+ pc++;
+ rg.l = data;
+ goto loop;
+
+ case 0x3E: // LD A,imm
+ pc++;
+ rg.a = data;
+ goto loop;
+
+ case 0x3A:{// LD A,(addr)
+ fuint16 addr = GET_ADDR();
+ pc += 2;
+ rg.a = READ( addr );
+ goto loop;
+ }
+
+// Conditional
+
+#define ZERO (flags & Z40)
+#define CARRY (flags & C01)
+#define EVEN (flags & P04)
+#define MINUS (flags & S80)
+
+// JR
+// TODO: more efficient way to handle negative branch that wraps PC around
+#define JR( cond ) {\
+ int offset = (BOOST::int8_t) data;\
+ pc++;\
+ if ( !(cond) )\
+ goto jr_not_taken;\
+ pc = uint16_t (pc + offset);\
+ goto loop;\
+}
+
+ case 0x20: JR( !ZERO ) // JR NZ,disp
+ case 0x28: JR( ZERO ) // JR Z,disp
+ case 0x30: JR( !CARRY ) // JR NC,disp
+ case 0x38: JR( CARRY ) // JR C,disp
+ case 0x18: JR( true ) // JR disp
+
+ case 0x10:{// DJNZ disp
+ int temp = rg.b - 1;
+ rg.b = temp;
+ JR( temp )
+ }
+
+// JP
+#define JP( cond ) if ( !(cond) ) goto jp_not_taken; pc = GET_ADDR(); goto loop;
+
+ case 0xC2: JP( !ZERO ) // JP NZ,addr
+ case 0xCA: JP( ZERO ) // JP Z,addr
+ case 0xD2: JP( !CARRY ) // JP NC,addr
+ case 0xDA: JP( CARRY ) // JP C,addr
+ case 0xE2: JP( !EVEN ) // JP PO,addr
+ case 0xEA: JP( EVEN ) // JP PE,addr
+ case 0xF2: JP( !MINUS ) // JP P,addr
+ case 0xFA: JP( MINUS ) // JP M,addr
+
+ case 0xC3: // JP addr
+ pc = GET_ADDR();
+ goto loop;
+
+ case 0xE9: // JP HL
+ pc = rp.hl;
+ goto loop;
+
+// RET
+#define RET( cond ) if ( cond ) goto ret_taken; s_time -= 6; goto loop;
+
+ case 0xC0: RET( !ZERO ) // RET NZ
+ case 0xC8: RET( ZERO ) // RET Z
+ case 0xD0: RET( !CARRY ) // RET NC
+ case 0xD8: RET( CARRY ) // RET C
+ case 0xE0: RET( !EVEN ) // RET PO
+ case 0xE8: RET( EVEN ) // RET PE
+ case 0xF0: RET( !MINUS ) // RET P
+ case 0xF8: RET( MINUS ) // RET M
+
+ case 0xC9: // RET
+ ret_taken:
+ pc = READ_WORD( sp );
+ sp = uint16_t (sp + 2);
+ goto loop;
+
+// CALL
+#define CALL( cond ) if ( cond ) goto call_taken; goto call_not_taken;
+
+ case 0xC4: CALL( !ZERO ) // CALL NZ,addr
+ case 0xCC: CALL( ZERO ) // CALL Z,addr
+ case 0xD4: CALL( !CARRY ) // CALL NC,addr
+ case 0xDC: CALL( CARRY ) // CALL C,addr
+ case 0xE4: CALL( !EVEN ) // CALL PO,addr
+ case 0xEC: CALL( EVEN ) // CALL PE,addr
+ case 0xF4: CALL( !MINUS ) // CALL P,addr
+ case 0xFC: CALL( MINUS ) // CALL M,addr
+
+ case 0xCD:{// CALL addr
+ call_taken:
+ fuint16 addr = pc + 2;
+ pc = GET_ADDR();
+ sp = uint16_t (sp - 2);
+ WRITE_WORD( sp, addr );
+ goto loop;
+ }
+
+ case 0xFF: // RST
+ if ( pc > idle_addr )
+ goto hit_idle_addr;
+ CASE7( C7, CF, D7, DF, E7, EF, F7 ):
+ data = pc;
+ pc = opcode & 0x38;
+ goto push_data;
+
+// PUSH/POP
+ case 0xF5: // PUSH AF
+ data = rg.a * 0x100u + flags;
+ goto push_data;
+
+ case 0xC5: // PUSH BC
+ case 0xD5: // PUSH DE
+ case 0xE5: // PUSH HL
+ data = R16( opcode, 4, 0xC5 );
+ push_data:
+ sp = uint16_t (sp - 2);
+ WRITE_WORD( sp, data );
+ goto loop;
+
+ case 0xF1: // POP AF
+ flags = READ( sp );
+ rg.a = READ( sp + 1 );
+ sp = uint16_t (sp + 2);
+ goto loop;
+
+ case 0xC1: // POP BC
+ case 0xD1: // POP DE
+ case 0xE1: // POP HL
+ R16( opcode, 4, 0xC1 ) = READ_WORD( sp );
+ sp = uint16_t (sp + 2);
+ goto loop;
+
+// ADC/ADD/SBC/SUB
+ case 0x96: // SUB (HL)
+ case 0x86: // ADD (HL)
+ flags &= ~C01;
+ case 0x9E: // SBC (HL)
+ case 0x8E: // ADC (HL)
+ data = READ( rp.hl );
+ goto adc_data;
+
+ case 0xD6: // SUB A,imm
+ case 0xC6: // ADD imm
+ flags &= ~C01;
+ case 0xDE: // SBC A,imm
+ case 0xCE: // ADC imm
+ pc++;
+ goto adc_data;
+
+ CASE7( 90, 91, 92, 93, 94, 95, 97 ): // SUB r
+ CASE7( 80, 81, 82, 83, 84, 85, 87 ): // ADD r
+ flags &= ~C01;
+ CASE7( 98, 99, 9A, 9B, 9C, 9D, 9F ): // SBC r
+ CASE7( 88, 89, 8A, 8B, 8C, 8D, 8F ): // ADC r
+ data = R8( opcode & 7, 0 );
+ adc_data: {
+ int result = data + (flags & C01);
+ data ^= rg.a;
+ flags = opcode >> 3 & N02; // bit 4 is set in subtract opcodes
+ if ( flags )
+ result = -result;
+ result += rg.a;
+ data ^= result;
+ flags |=(data & H10) |
+ ((data - -0x80) >> 6 & V04) |
+ SZ28C( result & 0x1FF );
+ rg.a = result;
+ goto loop;
+ }
+
+// CP
+ case 0xBE: // CP (HL)
+ data = READ( rp.hl );
+ goto cp_data;
+
+ case 0xFE: // CP imm
+ pc++;
+ goto cp_data;
+
+ CASE7( B8, B9, BA, BB, BC, BD, BF ): // CP r
+ data = R8( opcode, 0xB8 );
+ cp_data: {
+ int result = rg.a - data;
+ flags = N02 | (data & (F20 | F08)) | (result >> 8 & C01);
+ data ^= rg.a;
+ flags |=(((result ^ rg.a) & data) >> 5 & V04) |
+ (((data & H10) ^ result) & (S80 | H10));
+ if ( (uint8_t) result )
+ goto loop;
+ flags |= Z40;
+ goto loop;
+ }
+
+// ADD HL,rp
+
+ case 0x39: // ADD HL,SP
+ data = sp;
+ goto add_hl_data;
+
+ case 0x09: // ADD HL,BC
+ case 0x19: // ADD HL,DE
+ case 0x29: // ADD HL,HL
+ data = R16( opcode, 4, 0x09 );
+ add_hl_data: {
+ blargg_ulong sum = rp.hl + data;
+ data ^= rp.hl;
+ rp.hl = sum;
+ flags = (flags & (S80 | Z40 | V04)) |
+ (sum >> 16) |
+ (sum >> 8 & (F20 | F08)) |
+ ((data ^ sum) >> 8 & H10);
+ goto loop;
+ }
+
+ case 0x27:{// DAA
+ int a = rg.a;
+ if ( a > 0x99 )
+ flags |= C01;
+
+ int adjust = 0x60 & -(flags & C01);
+
+ if ( flags & H10 || (a & 0x0F) > 9 )
+ adjust |= 0x06;
+
+ if ( flags & N02 )
+ adjust = -adjust;
+ a += adjust;
+
+ flags = (flags & (C01 | N02)) |
+ ((rg.a ^ a) & H10) |
+ SZ28P( (uint8_t) a );
+ rg.a = a;
+ goto loop;
+ }
+ /*
+ case 0x27:{// DAA
+ // more optimized, but probably not worth the obscurity
+ int f = (rg.a + (0xFF - 0x99)) >> 8 | flags; // (a > 0x99 ? C01 : 0) | flags
+ int adjust = 0x60 & -(f & C01); // f & C01 ? 0x60 : 0
+
+ if ( (((rg.a + (0x0F - 9)) ^ rg.a) | f) & H10 ) // flags & H10 || (rg.a & 0x0F) > 9
+ adjust |= 0x06;
+
+ if ( f & N02 )
+ adjust = -adjust;
+ int a = rg.a + adjust;
+
+ flags = (f & (N02 | C01)) | ((rg.a ^ a) & H10) | SZ28P( (uint8_t) a );
+ rg.a = a;
+ goto loop;
+ }
+ */
+
+// INC/DEC
+ case 0x34: // INC (HL)
+ data = READ( rp.hl ) + 1;
+ WRITE( rp.hl, data );
+ goto inc_set_flags;
+
+ CASE7( 04, 0C, 14, 1C, 24, 2C, 3C ): // INC r
+ data = ++R8( opcode >> 3, 0 );
+ inc_set_flags:
+ flags = (flags & C01) |
+ (((data & 0x0F) - 1) & H10) |
+ SZ28( (uint8_t) data );
+ if ( data != 0x80 )
+ goto loop;
+ flags |= V04;
+ goto loop;
+
+ case 0x35: // DEC (HL)
+ data = READ( rp.hl ) - 1;
+ WRITE( rp.hl, data );
+ goto dec_set_flags;
+
+ CASE7( 05, 0D, 15, 1D, 25, 2D, 3D ): // DEC r
+ data = --R8( opcode >> 3, 0 );
+ dec_set_flags:
+ flags = (flags & C01) | N02 |
+ (((data & 0x0F) + 1) & H10) |
+ SZ28( (uint8_t) data );
+ if ( data != 0x7F )
+ goto loop;
+ flags |= V04;
+ goto loop;
+
+ case 0x03: // INC BC
+ case 0x13: // INC DE
+ case 0x23: // INC HL
+ R16( opcode, 4, 0x03 )++;
+ goto loop;
+
+ case 0x33: // INC SP
+ sp = uint16_t (sp + 1);
+ goto loop;
+
+ case 0x0B: // DEC BC
+ case 0x1B: // DEC DE
+ case 0x2B: // DEC HL
+ R16( opcode, 4, 0x0B )--;
+ goto loop;
+
+ case 0x3B: // DEC SP
+ sp = uint16_t (sp - 1);
+ goto loop;
+
+// AND
+ case 0xA6: // AND (HL)
+ data = READ( rp.hl );
+ goto and_data;
+
+ case 0xE6: // AND imm
+ pc++;
+ goto and_data;
+
+ CASE7( A0, A1, A2, A3, A4, A5, A7 ): // AND r
+ data = R8( opcode, 0xA0 );
+ and_data:
+ rg.a &= data;
+ flags = SZ28P( rg.a ) | H10;
+ goto loop;
+
+// OR
+ case 0xB6: // OR (HL)
+ data = READ( rp.hl );
+ goto or_data;
+
+ case 0xF6: // OR imm
+ pc++;
+ goto or_data;
+
+ CASE7( B0, B1, B2, B3, B4, B5, B7 ): // OR r
+ data = R8( opcode, 0xB0 );
+ or_data:
+ rg.a |= data;
+ flags = SZ28P( rg.a );
+ goto loop;
+
+// XOR
+ case 0xAE: // XOR (HL)
+ data = READ( rp.hl );
+ goto xor_data;
+
+ case 0xEE: // XOR imm
+ pc++;
+ goto xor_data;
+
+ CASE7( A8, A9, AA, AB, AC, AD, AF ): // XOR r
+ data = R8( opcode, 0xA8 );
+ xor_data:
+ rg.a ^= data;
+ flags = SZ28P( rg.a );
+ goto loop;
+
+// LD
+ CASE7( 70, 71, 72, 73, 74, 75, 77 ): // LD (HL),r
+ WRITE( rp.hl, R8( opcode, 0x70 ) );
+ goto loop;
+
+ CASE6( 41, 42, 43, 44, 45, 47 ): // LD B,r
+ CASE6( 48, 4A, 4B, 4C, 4D, 4F ): // LD C,r
+ CASE6( 50, 51, 53, 54, 55, 57 ): // LD D,r
+ CASE6( 58, 59, 5A, 5C, 5D, 5F ): // LD E,r
+ CASE6( 60, 61, 62, 63, 65, 67 ): // LD H,r
+ CASE6( 68, 69, 6A, 6B, 6C, 6F ): // LD L,r
+ CASE6( 78, 79, 7A, 7B, 7C, 7D ): // LD A,r
+ R8( opcode >> 3 & 7, 0 ) = R8( opcode & 7, 0 );
+ goto loop;
+
+ CASE5( 06, 0E, 16, 1E, 26 ): // LD r,imm
+ R8( opcode >> 3, 0 ) = data;
+ pc++;
+ goto loop;
+
+ case 0x36: // LD (HL),imm
+ pc++;
+ WRITE( rp.hl, data );
+ goto loop;
+
+ CASE7( 46, 4E, 56, 5E, 66, 6E, 7E ): // LD r,(HL)
+ R8( opcode >> 3, 8 ) = READ( rp.hl );
+ goto loop;
+
+ case 0x01: // LD rp,imm
+ case 0x11:
+ case 0x21:
+ R16( opcode, 4, 0x01 ) = GET_ADDR();
+ pc += 2;
+ goto loop;
+
+ case 0x31: // LD sp,imm
+ sp = GET_ADDR();
+ pc += 2;
+ goto loop;
+
+ case 0x2A:{// LD HL,(addr)
+ fuint16 addr = GET_ADDR();
+ pc += 2;
+ rp.hl = READ_WORD( addr );
+ goto loop;
+ }
+
+ case 0x32:{// LD (addr),A
+ fuint16 addr = GET_ADDR();
+ pc += 2;
+ WRITE( addr, rg.a );
+ goto loop;
+ }
+
+ case 0x22:{// LD (addr),HL
+ fuint16 addr = GET_ADDR();
+ pc += 2;
+ WRITE_WORD( addr, rp.hl );
+ goto loop;
+ }
+
+ case 0x02: // LD (BC),A
+ case 0x12: // LD (DE),A
+ WRITE( R16( opcode, 4, 0x02 ), rg.a );
+ goto loop;
+
+ case 0x0A: // LD A,(BC)
+ case 0x1A: // LD A,(DE)
+ rg.a = READ( R16( opcode, 4, 0x0A ) );
+ goto loop;
+
+ case 0xF9: // LD SP,HL
+ sp = rp.hl;
+ goto loop;
+
+// Rotate
+
+ case 0x07:{// RLCA
+ fuint16 temp = rg.a;
+ temp = (temp << 1) | (temp >> 7);
+ flags = (flags & (S80 | Z40 | P04)) |
+ (temp & (F20 | F08 | C01));
+ rg.a = temp;
+ goto loop;
+ }
+
+ case 0x0F:{// RRCA
+ fuint16 temp = rg.a;
+ flags = (flags & (S80 | Z40 | P04)) |
+ (temp & C01);
+ temp = (temp << 7) | (temp >> 1);
+ flags |= temp & (F20 | F08);
+ rg.a = temp;
+ goto loop;
+ }
+
+ case 0x17:{// RLA
+ blargg_ulong temp = (rg.a << 1) | (flags & C01);
+ flags = (flags & (S80 | Z40 | P04)) |
+ (temp & (F20 | F08)) |
+ (temp >> 8);
+ rg.a = temp;
+ goto loop;
+ }
+
+ case 0x1F:{// RRA
+ fuint16 temp = (flags << 7) | (rg.a >> 1);
+ flags = (flags & (S80 | Z40 | P04)) |
+ (temp & (F20 | F08)) |
+ (rg.a & C01);
+ rg.a = temp;
+ goto loop;
+ }
+
+// Misc
+ case 0x2F:{// CPL
+ fuint16 temp = ~rg.a;
+ flags = (flags & (S80 | Z40 | P04 | C01)) |
+ (temp & (F20 | F08)) |
+ (H10 | N02);
+ rg.a = temp;
+ goto loop;
+ }
+
+ case 0x3F:{// CCF
+ flags = ((flags & (S80 | Z40 | P04 | C01)) ^ C01) |
+ (flags << 4 & H10) |
+ (rg.a & (F20 | F08));
+ goto loop;
+ }
+
+ case 0x37: // SCF
+ flags = (flags & (S80 | Z40 | P04)) | C01 |
+ (rg.a & (F20 | F08));
+ goto loop;
+
+ case 0xDB: // IN A,(imm)
+ pc++;
+ rg.a = IN( data + rg.a * 0x100 );
+ goto loop;
+
+ case 0xE3:{// EX (SP),HL
+ fuint16 temp = READ_WORD( sp );
+ WRITE_WORD( sp, rp.hl );
+ rp.hl = temp;
+ goto loop;
+ }
+
+ case 0xEB:{// EX DE,HL
+ fuint16 temp = rp.hl;
+ rp.hl = rp.de;
+ rp.de = temp;
+ goto loop;
+ }
+
+ case 0xD9:{// EXX DE,HL
+ fuint16 temp = r.alt.w.bc;
+ r.alt.w.bc = rp.bc;
+ rp.bc = temp;
+
+ temp = r.alt.w.de;
+ r.alt.w.de = rp.de;
+ rp.de = temp;
+
+ temp = r.alt.w.hl;
+ r.alt.w.hl = rp.hl;
+ rp.hl = temp;
+ goto loop;
+ }
+
+ case 0xF3: // DI
+ r.iff1 = 0;
+ r.iff2 = 0;
+ goto loop;
+
+ case 0xFB: // EI
+ r.iff1 = 1;
+ r.iff2 = 1;
+ // TODO: delayed effect
+ goto loop;
+
+ case 0x76: // HALT
+ goto halt;
+
+//////////////////////////////////////// CB prefix
+ {
+ case 0xCB:
+ unsigned data2;
+ data2 = instr [1];
+ pc++;
+ switch ( data )
+ {
+
+ // Rotate left
+
+ #define RLC( read, write ) {\
+ fuint8 result = read;\
+ result = uint8_t (result << 1) | (result >> 7);\
+ flags = SZ28P( result ) | (result & C01);\
+ write;\
+ goto loop;\
+ }
+
+ case 0x06: // RLC (HL)
+ s_time += 7;
+ data = rp.hl;
+ rlc_data_addr:
+ RLC( READ( data ), WRITE( data, result ) )
+
+ CASE7( 00, 01, 02, 03, 04, 05, 07 ):{// RLC r
+ uint8_t& reg = R8( data, 0 );
+ RLC( reg, reg = result )
+ }
+
+ #define RL( read, write ) {\
+ fuint16 result = (read << 1) | (flags & C01);\
+ flags = SZ28PC( result );\
+ write;\
+ goto loop;\
+ }
+
+ case 0x16: // RL (HL)
+ s_time += 7;
+ data = rp.hl;
+ rl_data_addr:
+ RL( READ( data ), WRITE( data, result ) )
+
+ CASE7( 10, 11, 12, 13, 14, 15, 17 ):{// RL r
+ uint8_t& reg = R8( data, 0x10 );
+ RL( reg, reg = result )
+ }
+
+ #define SLA( read, add, write ) {\
+ fuint16 result = (read << 1) | add;\
+ flags = SZ28PC( result );\
+ write;\
+ goto loop;\
+ }
+
+ case 0x26: // SLA (HL)
+ s_time += 7;
+ data = rp.hl;
+ sla_data_addr:
+ SLA( READ( data ), 0, WRITE( data, result ) )
+
+ CASE7( 20, 21, 22, 23, 24, 25, 27 ):{// SLA r
+ uint8_t& reg = R8( data, 0x20 );
+ SLA( reg, 0, reg = result )
+ }
+
+ case 0x36: // SLL (HL)
+ s_time += 7;
+ data = rp.hl;
+ sll_data_addr:
+ SLA( READ( data ), 1, WRITE( data, result ) )
+
+ CASE7( 30, 31, 32, 33, 34, 35, 37 ):{// SLL r
+ uint8_t& reg = R8( data, 0x30 );
+ SLA( reg, 1, reg = result )
+ }
+
+ // Rotate right
+
+ #define RRC( read, write ) {\
+ fuint8 result = read;\
+ flags = result & C01;\
+ result = uint8_t (result << 7) | (result >> 1);\
+ flags |= SZ28P( result );\
+ write;\
+ goto loop;\
+ }
+
+ case 0x0E: // RRC (HL)
+ s_time += 7;
+ data = rp.hl;
+ rrc_data_addr:
+ RRC( READ( data ), WRITE( data, result ) )
+
+ CASE7( 08, 09, 0A, 0B, 0C, 0D, 0F ):{// RRC r
+ uint8_t& reg = R8( data, 0x08 );
+ RRC( reg, reg = result )
+ }
+
+ #define RR( read, write ) {\
+ fuint8 result = read;\
+ fuint8 temp = result & C01;\
+ result = uint8_t (flags << 7) | (result >> 1);\
+ flags = SZ28P( result ) | temp;\
+ write;\
+ goto loop;\
+ }
+
+ case 0x1E: // RR (HL)
+ s_time += 7;
+ data = rp.hl;
+ rr_data_addr:
+ RR( READ( data ), WRITE( data, result ) )
+
+ CASE7( 18, 19, 1A, 1B, 1C, 1D, 1F ):{// RR r
+ uint8_t& reg = R8( data, 0x18 );
+ RR( reg, reg = result )
+ }
+
+ #define SRA( read, write ) {\
+ fuint8 result = read;\
+ flags = result & C01;\
+ result = (result & 0x80) | (result >> 1);\
+ flags |= SZ28P( result );\
+ write;\
+ goto loop;\
+ }
+
+ case 0x2E: // SRA (HL)
+ data = rp.hl;
+ s_time += 7;
+ sra_data_addr:
+ SRA( READ( data ), WRITE( data, result ) )
+
+ CASE7( 28, 29, 2A, 2B, 2C, 2D, 2F ):{// SRA r
+ uint8_t& reg = R8( data, 0x28 );
+ SRA( reg, reg = result )
+ }
+
+ #define SRL( read, write ) {\
+ fuint8 result = read;\
+ flags = result & C01;\
+ result >>= 1;\
+ flags |= SZ28P( result );\
+ write;\
+ goto loop;\
+ }
+
+ case 0x3E: // SRL (HL)
+ s_time += 7;
+ data = rp.hl;
+ srl_data_addr:
+ SRL( READ( data ), WRITE( data, result ) )
+
+ CASE7( 38, 39, 3A, 3B, 3C, 3D, 3F ):{// SRL r
+ uint8_t& reg = R8( data, 0x38 );
+ SRL( reg, reg = result )
+ }
+
+ // BIT
+ {
+ unsigned temp;
+ CASE8( 46, 4E, 56, 5E, 66, 6E, 76, 7E ): // BIT b,(HL)
+ s_time += 4;
+ temp = READ( rp.hl );
+ flags &= C01;
+ goto bit_temp;
+ CASE7( 40, 41, 42, 43, 44, 45, 47 ): // BIT 0,r
+ CASE7( 48, 49, 4A, 4B, 4C, 4D, 4F ): // BIT 1,r
+ CASE7( 50, 51, 52, 53, 54, 55, 57 ): // BIT 2,r
+ CASE7( 58, 59, 5A, 5B, 5C, 5D, 5F ): // BIT 3,r
+ CASE7( 60, 61, 62, 63, 64, 65, 67 ): // BIT 4,r
+ CASE7( 68, 69, 6A, 6B, 6C, 6D, 6F ): // BIT 5,r
+ CASE7( 70, 71, 72, 73, 74, 75, 77 ): // BIT 6,r
+ CASE7( 78, 79, 7A, 7B, 7C, 7D, 7F ): // BIT 7,r
+ temp = R8( data & 7, 0 );
+ flags = (flags & C01) | (temp & (F20 | F08));
+ bit_temp:
+ int masked = temp & 1 << (data >> 3 & 7);
+ flags |=(masked & S80) | H10 |
+ ((masked - 1) >> 8 & (Z40 | P04));
+ goto loop;
+ }
+
+ // SET/RES
+ CASE8( 86, 8E, 96, 9E, A6, AE, B6, BE ): // RES b,(HL)
+ CASE8( C6, CE, D6, DE, E6, EE, F6, FE ):{// SET b,(HL)
+ s_time += 7;
+ int temp = READ( rp.hl );
+ int bit = 1 << (data >> 3 & 7);
+ temp |= bit; // SET
+ if ( !(data & 0x40) )
+ temp ^= bit; // RES
+ WRITE( rp.hl, temp );
+ goto loop;
+ }
+
+ CASE7( C0, C1, C2, C3, C4, C5, C7 ): // SET 0,r
+ CASE7( C8, C9, CA, CB, CC, CD, CF ): // SET 1,r
+ CASE7( D0, D1, D2, D3, D4, D5, D7 ): // SET 2,r
+ CASE7( D8, D9, DA, DB, DC, DD, DF ): // SET 3,r
+ CASE7( E0, E1, E2, E3, E4, E5, E7 ): // SET 4,r
+ CASE7( E8, E9, EA, EB, EC, ED, EF ): // SET 5,r
+ CASE7( F0, F1, F2, F3, F4, F5, F7 ): // SET 6,r
+ CASE7( F8, F9, FA, FB, FC, FD, FF ): // SET 7,r
+ R8( data & 7, 0 ) |= 1 << (data >> 3 & 7);
+ goto loop;
+
+ CASE7( 80, 81, 82, 83, 84, 85, 87 ): // RES 0,r
+ CASE7( 88, 89, 8A, 8B, 8C, 8D, 8F ): // RES 1,r
+ CASE7( 90, 91, 92, 93, 94, 95, 97 ): // RES 2,r
+ CASE7( 98, 99, 9A, 9B, 9C, 9D, 9F ): // RES 3,r
+ CASE7( A0, A1, A2, A3, A4, A5, A7 ): // RES 4,r
+ CASE7( A8, A9, AA, AB, AC, AD, AF ): // RES 5,r
+ CASE7( B0, B1, B2, B3, B4, B5, B7 ): // RES 6,r
+ CASE7( B8, B9, BA, BB, BC, BD, BF ): // RES 7,r
+ R8( data & 7, 0 ) &= ~(1 << (data >> 3 & 7));
+ goto loop;
+ }
+ assert( false );
+ }
+
+#undef GET_ADDR
+#define GET_ADDR() GET_LE16( instr + 1 )
+
+//////////////////////////////////////// ED prefix
+ {
+ case 0xED:
+ pc++;
+ s_time += ed_dd_timing [data] >> 4;
+ switch ( data )
+ {
+ {
+ blargg_ulong temp;
+ case 0x72: // SBC HL,SP
+ case 0x7A: // ADC HL,SP
+ temp = sp;
+ if ( 0 )
+ case 0x42: // SBC HL,BC
+ case 0x52: // SBC HL,DE
+ case 0x62: // SBC HL,HL
+ case 0x4A: // ADC HL,BC
+ case 0x5A: // ADC HL,DE
+ case 0x6A: // ADC HL,HL
+ temp = R16( data >> 3 & 6, 1, 0 );
+ blargg_ulong sum = temp + (flags & C01);
+ flags = ~data >> 2 & N02;
+ if ( flags )
+ sum = -sum;
+ sum += rp.hl;
+ temp ^= rp.hl;
+ temp ^= sum;
+ flags |=(sum >> 16 & C01) |
+ (temp >> 8 & H10) |
+ (sum >> 8 & (S80 | F20 | F08)) |
+ ((temp - -0x8000) >> 14 & V04);
+ rp.hl = sum;
+ if ( (uint16_t) sum )
+ goto loop;
+ flags |= Z40;
+ goto loop;
+ }
+
+ CASE8( 40, 48, 50, 58, 60, 68, 70, 78 ):{// IN r,(C)
+ int temp = IN( rp.bc );
+ R8( data >> 3, 8 ) = temp;
+ flags = (flags & C01) | SZ28P( temp );
+ goto loop;
+ }
+
+ case 0x71: // OUT (C),0
+ rg.flags = 0;
+ CASE7( 41, 49, 51, 59, 61, 69, 79 ): // OUT (C),r
+ OUT( rp.bc, R8( data >> 3, 8 ) );
+ goto loop;
+
+ {
+ unsigned temp;
+ case 0x73: // LD (ADDR),SP
+ temp = sp;
+ if ( 0 )
+ case 0x43: // LD (ADDR),BC
+ case 0x53: // LD (ADDR),DE
+ temp = R16( data, 4, 0x43 );
+ fuint16 addr = GET_ADDR();
+ pc += 2;
+ WRITE_WORD( addr, temp );
+ goto loop;
+ }
+
+ case 0x4B: // LD BC,(ADDR)
+ case 0x5B:{// LD DE,(ADDR)
+ fuint16 addr = GET_ADDR();
+ pc += 2;
+ R16( data, 4, 0x4B ) = READ_WORD( addr );
+ goto loop;
+ }
+
+ case 0x7B:{// LD SP,(ADDR)
+ fuint16 addr = GET_ADDR();
+ pc += 2;
+ sp = READ_WORD( addr );
+ goto loop;
+ }
+
+ case 0x67:{// RRD
+ fuint8 temp = READ( rp.hl );
+ WRITE( rp.hl, (rg.a << 4) | (temp >> 4) );
+ temp = (rg.a & 0xF0) | (temp & 0x0F);
+ flags = (flags & C01) | SZ28P( temp );
+ rg.a = temp;
+ goto loop;
+ }
+
+ case 0x6F:{// RLD
+ fuint8 temp = READ( rp.hl );
+ WRITE( rp.hl, (temp << 4) | (rg.a & 0x0F) );
+ temp = (rg.a & 0xF0) | (temp >> 4);
+ flags = (flags & C01) | SZ28P( temp );
+ rg.a = temp;
+ goto loop;
+ }
+
+ CASE8( 44, 4C, 54, 5C, 64, 6C, 74, 7C ): // NEG
+ opcode = 0x10; // flag to do SBC instead of ADC
+ flags &= ~C01;
+ data = rg.a;
+ rg.a = 0;
+ goto adc_data;
+
+ {
+ int inc;
+ case 0xA9: // CPD
+ case 0xB9: // CPDR
+ inc = -1;
+ if ( 0 )
+ case 0xA1: // CPI
+ case 0xB1: // CPIR
+ inc = +1;
+ fuint16 addr = rp.hl;
+ rp.hl = addr + inc;
+ int temp = READ( addr );
+
+ int result = rg.a - temp;
+ flags = (flags & C01) | N02 |
+ ((((temp ^ rg.a) & H10) ^ result) & (S80 | H10));
+
+ if ( !(uint8_t) result ) flags |= Z40;
+ result -= (flags & H10) >> 4;
+ flags |= result & F08;
+ flags |= result << 4 & F20;
+ if ( !--rp.bc )
+ goto loop;
+
+ flags |= V04;
+ if ( flags & Z40 || data < 0xB0 )
+ goto loop;
+
+ pc -= 2;
+ s_time += 5;
+ goto loop;
+ }
+
+ {
+ int inc;
+ case 0xA8: // LDD
+ case 0xB8: // LDDR
+ inc = -1;
+ if ( 0 )
+ case 0xA0: // LDI
+ case 0xB0: // LDIR
+ inc = +1;
+ fuint16 addr = rp.hl;
+ rp.hl = addr + inc;
+ int temp = READ( addr );
+
+ addr = rp.de;
+ rp.de = addr + inc;
+ WRITE( addr, temp );
+
+ temp += rg.a;
+ flags = (flags & (S80 | Z40 | C01)) |
+ (temp & F08) | (temp << 4 & F20);
+ if ( !--rp.bc )
+ goto loop;
+
+ flags |= V04;
+ if ( data < 0xB0 )
+ goto loop;
+
+ pc -= 2;
+ s_time += 5;
+ goto loop;
+ }
+
+ {
+ int inc;
+ case 0xAB: // OUTD
+ case 0xBB: // OTDR
+ inc = -1;
+ if ( 0 )
+ case 0xA3: // OUTI
+ case 0xB3: // OTIR
+ inc = +1;
+ fuint16 addr = rp.hl;
+ rp.hl = addr + inc;
+ int temp = READ( addr );
+
+ int b = --rg.b;
+ flags = (temp >> 6 & N02) | SZ28( b );
+ if ( b && data >= 0xB0 )
+ {
+ pc -= 2;
+ s_time += 5;
+ }
+
+ OUT( rp.bc, temp );
+ goto loop;
+ }
+
+ {
+ int inc;
+ case 0xAA: // IND
+ case 0xBA: // INDR
+ inc = -1;
+ if ( 0 )
+ case 0xA2: // INI
+ case 0xB2: // INIR
+ inc = +1;
+
+ fuint16 addr = rp.hl;
+ rp.hl = addr + inc;
+
+ int temp = IN( rp.bc );
+
+ int b = --rg.b;
+ flags = (temp >> 6 & N02) | SZ28( b );
+ if ( b && data >= 0xB0 )
+ {
+ pc -= 2;
+ s_time += 5;
+ }
+
+ WRITE( addr, temp );
+ goto loop;
+ }
+
+ case 0x47: // LD I,A
+ r.i = rg.a;
+ goto loop;
+
+ case 0x4F: // LD R,A
+ SET_R( rg.a );
+ debug_printf( "LD R,A not supported\n" );
+ warning = true;
+ goto loop;
+
+ case 0x57: // LD A,I
+ rg.a = r.i;
+ goto ld_ai_common;
+
+ case 0x5F: // LD A,R
+ rg.a = GET_R();
+ debug_printf( "LD A,R not supported\n" );
+ warning = true;
+ ld_ai_common:
+ flags = (flags & C01) | SZ28( rg.a ) | (r.iff2 << 2 & V04);
+ goto loop;
+
+ CASE8( 45, 4D, 55, 5D, 65, 6D, 75, 7D ): // RETI/RETN
+ r.iff1 = r.iff2;
+ goto ret_taken;
+
+ case 0x46: case 0x4E: case 0x66: case 0x6E: // IM 0
+ r.im = 0;
+ goto loop;
+
+ case 0x56: case 0x76: // IM 1
+ r.im = 1;
+ goto loop;
+
+ case 0x5E: case 0x7E: // IM 2
+ r.im = 2;
+ goto loop;
+
+ default:
+ debug_printf( "Opcode $ED $%02X not supported\n", data );
+ warning = true;
+ goto loop;
+ }
+ assert( false );
+ }
+
+//////////////////////////////////////// DD/FD prefix
+ {
+ fuint16 ixy;
+ case 0xDD:
+ ixy = ix;
+ goto ix_prefix;
+ case 0xFD:
+ ixy = iy;
+ ix_prefix:
+ pc++;
+ unsigned data2 = READ_PROG( pc );
+ s_time += ed_dd_timing [data] & 0x0F;
+ switch ( data )
+ {
+ // TODO: more efficient way of avoid negative address
+ // TODO: avoid using this as argument to READ() since it is evaluated twice
+ #define IXY_DISP( ixy, disp ) uint16_t ((ixy) + (disp))
+
+ #define SET_IXY( in ) if ( opcode == 0xDD ) ix = in; else iy = in;
+
+ // ADD/ADC/SUB/SBC
+
+ case 0x96: // SUB (IXY+disp)
+ case 0x86: // ADD (IXY+disp)
+ flags &= ~C01;
+ case 0x9E: // SBC (IXY+disp)
+ case 0x8E: // ADC (IXY+disp)
+ pc++;
+ opcode = data;
+ data = READ( IXY_DISP( ixy, (int8_t) data2 ) );
+ goto adc_data;
+
+ case 0x94: // SUB HXY
+ case 0x84: // ADD HXY
+ flags &= ~C01;
+ case 0x9C: // SBC HXY
+ case 0x8C: // ADC HXY
+ opcode = data;
+ data = ixy >> 8;
+ goto adc_data;
+
+ case 0x95: // SUB LXY
+ case 0x85: // ADD LXY
+ flags &= ~C01;
+ case 0x9D: // SBC LXY
+ case 0x8D: // ADC LXY
+ opcode = data;
+ data = (uint8_t) ixy;
+ goto adc_data;
+
+ {
+ unsigned temp;
+ case 0x39: // ADD IXY,SP
+ temp = sp;
+ goto add_ixy_data;
+
+ case 0x29: // ADD IXY,HL
+ temp = ixy;
+ goto add_ixy_data;
+
+ case 0x09: // ADD IXY,BC
+ case 0x19: // ADD IXY,DE
+ temp = R16( data, 4, 0x09 );
+ add_ixy_data: {
+ blargg_ulong sum = ixy + temp;
+ temp ^= ixy;
+ ixy = (uint16_t) sum;
+ flags = (flags & (S80 | Z40 | V04)) |
+ (sum >> 16) |
+ (sum >> 8 & (F20 | F08)) |
+ ((temp ^ sum) >> 8 & H10);
+ goto set_ixy;
+ }
+ }
+
+ // AND
+ case 0xA6: // AND (IXY+disp)
+ pc++;
+ data = READ( IXY_DISP( ixy, (int8_t) data2 ) );
+ goto and_data;
+
+ case 0xA4: // AND HXY
+ data = ixy >> 8;
+ goto and_data;
+
+ case 0xA5: // AND LXY
+ data = (uint8_t) ixy;
+ goto and_data;
+
+ // OR
+ case 0xB6: // OR (IXY+disp)
+ pc++;
+ data = READ( IXY_DISP( ixy, (int8_t) data2 ) );
+ goto or_data;
+
+ case 0xB4: // OR HXY
+ data = ixy >> 8;
+ goto or_data;
+
+ case 0xB5: // OR LXY
+ data = (uint8_t) ixy;
+ goto or_data;
+
+ // XOR
+ case 0xAE: // XOR (IXY+disp)
+ pc++;
+ data = READ( IXY_DISP( ixy, (int8_t) data2 ) );
+ goto xor_data;
+
+ case 0xAC: // XOR HXY
+ data = ixy >> 8;
+ goto xor_data;
+
+ case 0xAD: // XOR LXY
+ data = (uint8_t) ixy;
+ goto xor_data;
+
+ // CP
+ case 0xBE: // CP (IXY+disp)
+ pc++;
+ data = READ( IXY_DISP( ixy, (int8_t) data2 ) );
+ goto cp_data;
+
+ case 0xBC: // CP HXY
+ data = ixy >> 8;
+ goto cp_data;
+
+ case 0xBD: // CP LXY
+ data = (uint8_t) ixy;
+ goto cp_data;
+
+ // LD
+ CASE7( 70, 71, 72, 73, 74, 75, 77 ): // LD (IXY+disp),r
+ data = R8( data, 0x70 );
+ if ( 0 )
+ case 0x36: // LD (IXY+disp),imm
+ pc++, data = READ_PROG( pc );
+ pc++;
+ WRITE( IXY_DISP( ixy, (int8_t) data2 ), data );
+ goto loop;
+
+ CASE5( 44, 4C, 54, 5C, 7C ): // LD r,HXY
+ R8( data >> 3, 8 ) = ixy >> 8;
+ goto loop;
+
+ case 0x64: // LD HXY,HXY
+ case 0x6D: // LD LXY,LXY
+ goto loop;
+
+ CASE5( 45, 4D, 55, 5D, 7D ): // LD r,LXY
+ R8( data >> 3, 8 ) = ixy;
+ goto loop;
+
+ CASE7( 46, 4E, 56, 5E, 66, 6E, 7E ): // LD r,(IXY+disp)
+ pc++;
+ R8( data >> 3, 8 ) = READ( IXY_DISP( ixy, (int8_t) data2 ) );
+ goto loop;
+
+ case 0x26: // LD HXY,imm
+ pc++;
+ goto ld_hxy_data;
+
+ case 0x65: // LD HXY,LXY
+ data2 = (uint8_t) ixy;
+ goto ld_hxy_data;
+
+ CASE5( 60, 61, 62, 63, 67 ): // LD HXY,r
+ data2 = R8( data, 0x60 );
+ ld_hxy_data:
+ ixy = (uint8_t) ixy | (data2 << 8);
+ goto set_ixy;
+
+ case 0x2E: // LD LXY,imm
+ pc++;
+ goto ld_lxy_data;
+
+ case 0x6C: // LD LXY,HXY
+ data2 = ixy >> 8;
+ goto ld_lxy_data;
+
+ CASE5( 68, 69, 6A, 6B, 6F ): // LD LXY,r
+ data2 = R8( data, 0x68 );
+ ld_lxy_data:
+ ixy = (ixy & 0xFF00) | data2;
+ set_ixy:
+ if ( opcode == 0xDD )
+ {
+ ix = ixy;
+ goto loop;
+ }
+ iy = ixy;
+ goto loop;
+
+ case 0xF9: // LD SP,IXY
+ sp = ixy;
+ goto loop;
+
+ case 0x22:{// LD (ADDR),IXY
+ fuint16 addr = GET_ADDR();
+ pc += 2;
+ WRITE_WORD( addr, ixy );
+ goto loop;
+ }
+
+ case 0x21: // LD IXY,imm
+ ixy = GET_ADDR();
+ pc += 2;
+ goto set_ixy;
+
+ case 0x2A:{// LD IXY,(addr)
+ fuint16 addr = GET_ADDR();
+ ixy = READ_WORD( addr );
+ pc += 2;
+ goto set_ixy;
+ }
+
+ // DD/FD CB prefix
+ case 0xCB: {
+ data = IXY_DISP( ixy, (int8_t) data2 );
+ pc++;
+ data2 = READ_PROG( pc );
+ pc++;
+ switch ( data2 )
+ {
+ case 0x06: goto rlc_data_addr; // RLC (IXY)
+ case 0x16: goto rl_data_addr; // RL (IXY)
+ case 0x26: goto sla_data_addr; // SLA (IXY)
+ case 0x36: goto sll_data_addr; // SLL (IXY)
+ case 0x0E: goto rrc_data_addr; // RRC (IXY)
+ case 0x1E: goto rr_data_addr; // RR (IXY)
+ case 0x2E: goto sra_data_addr; // SRA (IXY)
+ case 0x3E: goto srl_data_addr; // SRL (IXY)
+
+ CASE8( 46, 4E, 56, 5E, 66, 6E, 76, 7E ):{// BIT b,(IXY+disp)
+ fuint8 temp = READ( data );
+ int masked = temp & 1 << (data2 >> 3 & 7);
+ flags = (flags & C01) | H10 |
+ (masked & S80) |
+ ((masked - 1) >> 8 & (Z40 | P04));
+ goto loop;
+ }
+
+ CASE8( 86, 8E, 96, 9E, A6, AE, B6, BE ): // RES b,(IXY+disp)
+ CASE8( C6, CE, D6, DE, E6, EE, F6, FE ):{// SET b,(IXY+disp)
+ int temp = READ( data );
+ int bit = 1 << (data2 >> 3 & 7);
+ temp |= bit; // SET
+ if ( !(data2 & 0x40) )
+ temp ^= bit; // RES
+ WRITE( data, temp );
+ goto loop;
+ }
+
+ default:
+ debug_printf( "Opcode $%02X $CB $%02X not supported\n", opcode, data2 );
+ warning = true;
+ goto loop;
+ }
+ assert( false );
+ }
+
+ // INC/DEC
+ case 0x23: // INC IXY
+ ixy = uint16_t (ixy + 1);
+ goto set_ixy;
+
+ case 0x2B: // DEC IXY
+ ixy = uint16_t (ixy - 1);
+ goto set_ixy;
+
+ case 0x34: // INC (IXY+disp)
+ ixy = IXY_DISP( ixy, (int8_t) data2 );
+ pc++;
+ data = READ( ixy ) + 1;
+ WRITE( ixy, data );
+ goto inc_set_flags;
+
+ case 0x35: // DEC (IXY+disp)
+ ixy = IXY_DISP( ixy, (int8_t) data2 );
+ pc++;
+ data = READ( ixy ) - 1;
+ WRITE( ixy, data );
+ goto dec_set_flags;
+
+ case 0x24: // INC HXY
+ ixy = uint16_t (ixy + 0x100);
+ data = ixy >> 8;
+ goto inc_xy_common;
+
+ case 0x2C: // INC LXY
+ data = uint8_t (ixy + 1);
+ ixy = (ixy & 0xFF00) | data;
+ inc_xy_common:
+ if ( opcode == 0xDD )
+ {
+ ix = ixy;
+ goto inc_set_flags;
+ }
+ iy = ixy;
+ goto inc_set_flags;
+
+ case 0x25: // DEC HXY
+ ixy = uint16_t (ixy - 0x100);
+ data = ixy >> 8;
+ goto dec_xy_common;
+
+ case 0x2D: // DEC LXY
+ data = uint8_t (ixy - 1);
+ ixy = (ixy & 0xFF00) | data;
+ dec_xy_common:
+ if ( opcode == 0xDD )
+ {
+ ix = ixy;
+ goto dec_set_flags;
+ }
+ iy = ixy;
+ goto dec_set_flags;
+
+ // PUSH/POP
+ case 0xE5: // PUSH IXY
+ data = ixy;
+ goto push_data;
+
+ case 0xE1:{// POP IXY
+ ixy = READ_WORD( sp );
+ sp = uint16_t (sp + 2);
+ goto set_ixy;
+ }
+
+ // Misc
+
+ case 0xE9: // JP (IXY)
+ pc = ixy;
+ goto loop;
+
+ case 0xE3:{// EX (SP),IXY
+ fuint16 temp = READ_WORD( sp );
+ WRITE_WORD( sp, ixy );
+ ixy = temp;
+ goto set_ixy;
+ }
+
+ default:
+ debug_printf( "Unnecessary DD/FD prefix encountered\n" );
+ warning = true;
+ pc--;
+ goto loop;
+ }
+ assert( false );
+ }
+
+ }
+ debug_printf( "Unhandled main opcode: $%02X\n", opcode );
+ assert( false );
+
+hit_idle_addr:
+ s_time -= 11;
+ goto out_of_time;
+halt:
+ s_time &= 3; // increment by multiple of 4
+out_of_time:
+ pc--;
+
+ s.time = s_time;
+ rg.flags = flags;
+ r.ix = ix;
+ r.iy = iy;
+ r.sp = sp;
+ r.pc = pc;
+ this->r.b = rg;
+ this->state_ = s;
+ this->state = &this->state_;
+
+ return warning;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-29 08:02:09 +0000