From f40bfc9267b13b54e6379dfe7539447662879d24 Mon Sep 17 00:00:00 2001 From: Sean Bartell Date: Sat, 25 Jun 2011 21:32:25 -0400 Subject: Add codecs to librbcodec. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97 Reviewed-on: http://gerrit.rockbox.org/137 Reviewed-by: Nils Wallménius Tested-by: Nils Wallménius --- lib/rbcodec/codecs/libgme/gb_cpu_run.h | 1187 ++++++++++++++++++++++++++++++++ 1 file changed, 1187 insertions(+) create mode 100644 lib/rbcodec/codecs/libgme/gb_cpu_run.h (limited to 'lib/rbcodec/codecs/libgme/gb_cpu_run.h') diff --git a/lib/rbcodec/codecs/libgme/gb_cpu_run.h b/lib/rbcodec/codecs/libgme/gb_cpu_run.h new file mode 100644 index 0000000000..1ea8b59249 --- /dev/null +++ b/lib/rbcodec/codecs/libgme/gb_cpu_run.h @@ -0,0 +1,1187 @@ +// Game_Music_Emu 0.6-pre. http://www.slack.net/~ant/ + +#if 0 +/* Define these macros in the source file before #including this file. +- Parameters might be expressions, so they are best evaluated only once, +though they NEVER have side-effects, so multiple evaluation is OK. +- Output parameters might be a multiple-assignment expression like "a=x", +so they must NOT be parenthesized. +- Macros "returning" void may use a {} statement block. */ + + // 0 <= addr <= 0xFFFF + page_size + // time functions can be used + int READ_MEM( addr_t ); + void WRITE_MEM( addr_t, int data ); + + // Access of 0xFF00 + offset + // 0 <= offset <= 0xFF + int READ_IO( int offset ); + void WRITE_IO( int offset, int data ); + + // Often-used instructions use this instead of READ_MEM + void READ_FAST( addr_t, int& out ); + +// The following can be used within macros: + + // Current time + cpu_time_t TIME(); +#endif + +/* Copyright (C) 2003-2009 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 */ + +// Common instructions: +// +// 365880 FA LD A,(nn) +// 355863 20 JR NZ +// 313655 21 LD HL,nn +// 274580 28 JR Z +// 252878 FE CP n +// 230541 7E LD A,(HL) +// 226209 2A LD A,(HL+) +// 217467 CD CALL +// 212034 C9 RET +// 208376 CB CB prefix +// +// 27486 CB 7E BIT 7,(HL) +// 15925 CB 76 BIT 6,(HL) +// 13035 CB 19 RR C +// 11557 CB 7F BIT 7,A +// 10898 CB 37 SWAP A +// 10208 CB 66 BIT 4,(HL) + +// Allows MWCW debugger to step through code properly +#ifdef CPU_BEGIN + CPU_BEGIN +#endif + +#define TIME() s.time + +#define CODE_PAGE( addr ) s.code_map [GB_CPU_PAGE( addr )] +#define READ_CODE( addr ) (CODE_PAGE( addr ) [GB_CPU_OFFSET( addr )]) + +// Flags with hex value for clarity when used as mask. +// Stored in indicated variable during emulation. +int const z80 = 0x80; // cz +int const n40 = 0x40; // ph +int const h20 = 0x20; // ph +int const c10 = 0x10; // cz + +#define SET_FLAGS( in )\ +{\ + cz = ((in) << 4 & 0x100) + (~(in) >> 7 & 1);\ + ph = (~(in) << 2 & 0x100) + ((in) >> 1 & 0x10);\ +} + +// random bits in cz to catch misuse of them +#define SET_FLAGS_DEBUG( in )\ +{\ + cz = ((in) << 4 & 0x100) | (rand() & ~0x1FF) | ((in) & 0x80 ? 0 : (rand() & 0xFF) | 1);\ + ph = (~(in) << 2 & 0x100) | (((in) >> 1 & 0x10) ^ BYTE( cz ));\ +} + +#define GET_FLAGS( out )\ +{\ + out = (cz >> 4 & c10);\ + out += ~ph >> 2 & n40;\ + out += (ph ^ cz) << 1 & h20;\ + if ( !BYTE( cz ) )\ + out += z80;\ +} + +#define CC_NZ() ( BYTE( cz )) +#define CC_Z() (!BYTE( cz )) +#define CC_NC() (!(cz & 0x100)) +#define CC_C() ( cz & 0x100 ) + +// Truncation +#define BYTE( n ) ((uint8_t ) (n)) /* (unsigned) n & 0xFF */ +#define SBYTE( n ) ((int8_t ) (n)) /* (BYTE( n ) ^ 0x80) - 0x80 */ +#define WORD( n ) ((uint16_t) (n)) /* (unsigned) n & 0xFFFF */ + +{ + struct cpu_state_t s; + cpu->cpu_state = &s; + memcpy( &s, &cpu->cpu_state_, sizeof s ); + + union { + struct { + #ifdef BLARGG_BIG_ENDIAN + byte b, c, d, e, h, l, flags, a; + #else + byte c, b, e, d, l, h, a, flags; + #endif + } rg; // individual registers + struct core_regs_t rp; // pairs + + byte r8_ [8]; // indexed registers (use R8 macro due to endian dependence) + uint16_t r16 [4]; // indexed pairs + } reg; + BOOST_STATIC_ASSERT( sizeof reg.rg == 8 && sizeof reg.rp == 8 ); + + #ifdef BLARGG_BIG_ENDIAN + #define R8( n ) (reg.r8_ [n]) + #elif BLARGG_LITTLE_ENDIAN + #define R8( n ) (reg.r8_ [(n) ^ 1]) + #else + // Be sure "blargg_endian.h" has been #included in the file that #includes this + #error "Byte order of CPU must be known" + #endif + + #define R16( n ) (reg.r16 [n]) + #define RG (reg.rg) + #define RP (reg.rp) + + RP = cpu->r.rp; + int pc = cpu->r.pc; + int sp = cpu->r.sp; + int ph; + int cz; + SET_FLAGS( RG.flags ); + + int time = s.time; + +loop: + + check( (unsigned) pc < 0x10000 + 1 ); // +1 so emulator can catch wrap-around + check( (unsigned) sp < 0x10000 ); + + byte const* instr = CODE_PAGE( pc ); + int op; + + if ( GB_CPU_OFFSET(~0) == ~0 ) + { + op = instr [pc]; + pc++; + instr += pc; + } + else + { + instr += GB_CPU_OFFSET( pc ); + op = *instr++; + pc++; + } + +#define GET_ADDR() GET_LE16( instr ) + + static byte const instr_times [256*2] = { + // 0 1 2 3 4 5 6 7 8 9 A B C D E F + 4,12, 8, 8, 4, 4, 8, 4,20, 8, 8, 8, 4, 4, 8, 4,// 0 + 4,12, 8, 8, 4, 4, 8, 4,12, 8, 8, 8, 4, 4, 8, 4,// 1 + 8,12, 8, 8, 4, 4, 8, 4, 8, 8, 8, 8, 4, 4, 8, 4,// 2 + 8,12, 8, 8,12,12,12, 4, 8, 8, 8, 8, 4, 4, 8, 4,// 3 + 4, 4, 4, 4, 4, 4, 8, 4, 4, 4, 4, 4, 4, 4, 8, 4,// 4 + 4, 4, 4, 4, 4, 4, 8, 4, 4, 4, 4, 4, 4, 4, 8, 4,// 5 + 4, 4, 4, 4, 4, 4, 8, 4, 4, 4, 4, 4, 4, 4, 8, 4,// 6 + 8, 8, 8, 8, 8, 8, 0, 8, 4, 4, 4, 4, 4, 4, 8, 4,// 7 + 4, 4, 4, 4, 4, 4, 8, 4, 4, 4, 4, 4, 4, 4, 8, 4,// 8 + 4, 4, 4, 4, 4, 4, 8, 4, 4, 4, 4, 4, 4, 4, 8, 4,// 9 + 4, 4, 4, 4, 4, 4, 8, 4, 4, 4, 4, 4, 4, 4, 8, 4,// A + 4, 4, 4, 4, 4, 4, 8, 4, 4, 4, 4, 4, 4, 4, 8, 4,// B + 8,12,16,16,12,16, 8,16, 8,16,16, 0,12,24, 8,16,// C + 8,12,16, 0,12,16, 8,16, 8,16,16, 0,12, 0, 8,16,// D + 12,12, 8, 0, 0,16, 8,16,16, 4,16, 0, 0, 0, 8,16,// E + 12,12, 8, 4, 0,16, 8,16,12, 8,16, 4, 0, 0, 8,16,// F + + // CB prefixed + // 0 1 2 3 4 5 6 7 8 9 A B C D E F + 8, 8, 8, 8, 8, 8,16, 8, 8, 8, 8, 8, 8, 8,16, 8,// 0 + 8, 8, 8, 8, 8, 8,16, 8, 8, 8, 8, 8, 8, 8,16, 8,// 1 + 8, 8, 8, 8, 8, 8,16, 8, 8, 8, 8, 8, 8, 8,16, 8,// 2 + 8, 8, 8, 8, 8, 8,16, 8, 8, 8, 8, 8, 8, 8,16, 8,// 3 + 8, 8, 8, 8, 8, 8,12, 8, 8, 8, 8, 8, 8, 8,12, 8,// 4 + 8, 8, 8, 8, 8, 8,12, 8, 8, 8, 8, 8, 8, 8,12, 8,// 5 + 8, 8, 8, 8, 8, 8,12, 8, 8, 8, 8, 8, 8, 8,12, 8,// 6 + 8, 8, 8, 8, 8, 8,12, 8, 8, 8, 8, 8, 8, 8,12, 8,// 7 + 8, 8, 8, 8, 8, 8,16, 8, 8, 8, 8, 8, 8, 8,16, 8,// 8 + 8, 8, 8, 8, 8, 8,16, 8, 8, 8, 8, 8, 8, 8,16, 8,// 9 + 8, 8, 8, 8, 8, 8,16, 8, 8, 8, 8, 8, 8, 8,16, 8,// A + 8, 8, 8, 8, 8, 8,16, 8, 8, 8, 8, 8, 8, 8,16, 8,// B + 8, 8, 8, 8, 8, 8,16, 8, 8, 8, 8, 8, 8, 8,16, 8,// C + 8, 8, 8, 8, 8, 8,16, 8, 8, 8, 8, 8, 8, 8,16, 8,// D + 8, 8, 8, 8, 8, 8,16, 8, 8, 8, 8, 8, 8, 8,16, 8,// E + 8, 8, 8, 8, 8, 8,16, 8, 8, 8, 8, 8, 8, 8,16, 8,// F + }; + + if ( time >= 0 ) + goto stop; + + time += instr_times [op]; + + int data; + data = *instr; + s.time = time; + + #ifdef CPU_INSTR_HOOK + { CPU_INSTR_HOOK( (pc-1), (instr-1), rg.a, rp.bc, rp.de, rp.hl, sp ); } + #endif + + switch ( op ) + { + +// TODO: more efficient way to handle negative branch that wraps PC around +#define BRANCH_( cond, clocks )\ +{\ + pc++;\ + if ( !(cond) )\ + goto loop;\ + pc = WORD( pc + SBYTE( data ) );\ + time += clocks;\ + goto loop;\ +} + +#define BRANCH( cond ) BRANCH_( cond, 4 ) + +// Most Common + + case 0x20: // JR NZ + BRANCH( CC_NZ() ) + + case 0x21: // LD HL,IMM (common) + RP.hl = GET_ADDR(); + pc += 2; + goto loop; + + case 0x28: // JR Z + BRANCH( CC_Z() ) + + case 0xF2: // LD A,(0xFF00+C) + READ_IO( this, RG.c, RG.a ); + goto loop; + + case 0xF0: // LD A,(0xFF00+imm) + pc++; + READ_IO( this, data, RG.a ); + goto loop; + + { + int temp; + case 0x0A: // LD A,(BC) + temp = RP.bc; + goto ld_a_ind_comm; + + case 0x3A: // LD A,(HL-) + temp = RP.hl; + RP.hl = temp - 1; + goto ld_a_ind_comm; + + case 0x1A: // LD A,(DE) + temp = RP.de; + goto ld_a_ind_comm; + + case 0x2A: // LD A,(HL+) (common) + temp = RP.hl; + RP.hl = temp + 1; + goto ld_a_ind_comm; + + case 0xFA: // LD A,IND16 (common) + temp = GET_ADDR(); + pc += 2; + ld_a_ind_comm: + READ_FAST( this, temp, RG.a ); + goto loop; + } + + { + int temp; + case 0xBE: // CP (HL) + temp = READ_MEM( this, RP.hl ); + goto cmp_comm; + + case 0xB8: // CP B + case 0xB9: // CP C + case 0xBA: // CP D + case 0xBB: // CP E + case 0xBC: // CP H + case 0xBD: // CP L + case 0xBF: // CP A + temp = R8( op & 7 ); + cmp_comm: + ph = RG.a ^ temp; // N=1 H=* + cz = RG.a - temp; // C=* Z=* + goto loop; + } + + case 0xFE: // CP IMM + pc++; + ph = RG.a ^ data; // N=1 H=* + cz = RG.a - data; // C=* Z=* + goto loop; + + case 0x46: // LD B,(HL) + case 0x4E: // LD C,(HL) + case 0x56: // LD D,(HL) + case 0x5E: // LD E,(HL) + case 0x66: // LD H,(HL) + case 0x6E: // LD L,(HL) + case 0x7E:{// LD A,(HL) + int addr = RP.hl; + READ_FAST( this, addr, R8( op >> 3 & 7 ) ); + goto loop; + } + + case 0xC4: // CNZ (next-most-common) + pc += 2; + if ( CC_Z() ) + goto loop; + call: + time += 12; + pc -= 2; + case 0xCD: // CALL (most-common) + data = pc + 2; + pc = GET_ADDR(); + push: { + int addr = WORD( sp - 1 ); + WRITE_MEM( this, addr, (data >> 8) ); + sp = WORD( sp - 2 ); + WRITE_MEM( this, sp, data ); + goto loop; + } + + case 0xC8: // RET Z (next-most-common) + if ( CC_NZ() ) + goto loop; + ret: + time += 12; + case 0xD9: // RETI + case 0xC9:{// RET (most common) + pc = READ_MEM( this, sp ); + int addr = sp + 1; + sp = WORD( sp + 2 ); + pc += 0x100 * READ_MEM( this, addr ); + goto loop; + } + + case 0x00: // NOP + case 0x40: // LD B,B + case 0x49: // LD C,C + case 0x52: // LD D,D + case 0x5B: // LD E,E + case 0x64: // LD H,H + case 0x6D: // LD L,L + case 0x7F: // LD A,A + goto loop; + +// CB Instructions + + case 0xCB: + time += (instr_times + 256) [data]; + pc++; + // now data is the opcode + switch ( data ) { + + case 0x46: // BIT b,(HL) + case 0x4E: + case 0x56: + case 0x5E: + case 0x66: + case 0x6E: + case 0x76: + case 0x7E: { + int addr = RP.hl; + READ_FAST( this, addr, op ); + goto bit_comm; + } + + case 0x40: case 0x41: case 0x42: case 0x43: // BIT b,r + case 0x44: case 0x45: case 0x47: case 0x48: + case 0x49: case 0x4A: case 0x4B: case 0x4C: + case 0x4D: case 0x4F: case 0x50: case 0x51: + case 0x52: case 0x53: case 0x54: case 0x55: + case 0x57: case 0x58: case 0x59: case 0x5A: + case 0x5B: case 0x5C: case 0x5D: case 0x5F: + case 0x60: case 0x61: case 0x62: case 0x63: + case 0x64: case 0x65: case 0x67: case 0x68: + case 0x69: case 0x6A: case 0x6B: case 0x6C: + case 0x6D: case 0x6F: case 0x70: case 0x71: + case 0x72: case 0x73: case 0x74: case 0x75: + case 0x77: case 0x78: case 0x79: case 0x7A: + case 0x7B: case 0x7C: case 0x7D: case 0x7F: + op = R8( data & 7 ); + bit_comm: + ph = op >> (data >> 3 & 7) & 1; + cz = (cz & 0x100) + ph; + ph ^= 0x110; // N=0 H=1 + goto loop; + + case 0x86: // RES b,(HL) + case 0x8E: + case 0x96: + case 0x9E: + case 0xA6: + case 0xAE: + case 0xB6: + case 0xBE: { + int temp = READ_MEM( this, RP.hl ); + temp &= ~(1 << (data >> 3 & 7)); + WRITE_MEM( this, RP.hl, temp ); + goto loop; + } + + case 0xC6: // SET b,(HL) + case 0xCE: + case 0xD6: + case 0xDE: + case 0xE6: + case 0xEE: + case 0xF6: + case 0xFE: { + int temp = READ_MEM( this, RP.hl ); + temp |= 1 << (data >> 3 & 7); + WRITE_MEM( this, RP.hl, temp ); + goto loop; + } + + case 0xC0: case 0xC1: case 0xC2: case 0xC3: // SET b,r + case 0xC4: case 0xC5: case 0xC7: case 0xC8: + case 0xC9: case 0xCA: case 0xCB: case 0xCC: + case 0xCD: case 0xCF: case 0xD0: case 0xD1: + case 0xD2: case 0xD3: case 0xD4: case 0xD5: + case 0xD7: case 0xD8: case 0xD9: case 0xDA: + case 0xDB: case 0xDC: case 0xDD: case 0xDF: + case 0xE0: case 0xE1: case 0xE2: case 0xE3: + case 0xE4: case 0xE5: case 0xE7: case 0xE8: + case 0xE9: case 0xEA: case 0xEB: case 0xEC: + case 0xED: case 0xEF: case 0xF0: case 0xF1: + case 0xF2: case 0xF3: case 0xF4: case 0xF5: + case 0xF7: case 0xF8: case 0xF9: case 0xFA: + case 0xFB: case 0xFC: case 0xFD: case 0xFF: + R8( data & 7 ) |= 1 << (data >> 3 & 7); + goto loop; + + case 0x80: case 0x81: case 0x82: case 0x83: // RES b,r + case 0x84: case 0x85: case 0x87: case 0x88: + case 0x89: case 0x8A: case 0x8B: case 0x8C: + case 0x8D: case 0x8F: case 0x90: case 0x91: + case 0x92: case 0x93: case 0x94: case 0x95: + case 0x97: case 0x98: case 0x99: case 0x9A: + case 0x9B: case 0x9C: case 0x9D: case 0x9F: + case 0xA0: case 0xA1: case 0xA2: case 0xA3: + case 0xA4: case 0xA5: case 0xA7: case 0xA8: + case 0xA9: case 0xAA: case 0xAB: case 0xAC: + case 0xAD: case 0xAF: case 0xB0: case 0xB1: + case 0xB2: case 0xB3: case 0xB4: case 0xB5: + case 0xB7: case 0xB8: case 0xB9: case 0xBA: + case 0xBB: case 0xBC: case 0xBD: case 0xBF: + R8( data & 7 ) &= ~(1 << (data >> 3 & 7)); + goto loop; + + case 0x36: // SWAP (HL) + op = READ_MEM( this, RP.hl ); + goto swap_comm; + + case 0x30: // SWAP B + case 0x31: // SWAP C + case 0x32: // SWAP D + case 0x33: // SWAP E + case 0x34: // SWAP H + case 0x35: // SWAP L + case 0x37: // SWAP A + op = R8( data & 7 ); + swap_comm: + op = (op >> 4) + (op << 4); + cz = BYTE( op ); + ph = cz + 0x100; + if ( data == 0x36 ) + goto write_hl_op_ff; + R8( data & 7 ) = op; + goto loop; + +// Shift/Rotate + + case 0x26: // SLA (HL) + cz = 0; + case 0x16: // RL (HL) + cz = (cz >> 8 & 1) + (READ_MEM( this, RP.hl ) << 1); + goto rl_hl_common; + + case 0x06: // RLC (HL) + cz = READ_MEM( this, RP.hl ); + cz = (cz << 1) + (cz >> 7 & 1); + rl_hl_common: + // Z=* C=* + ph = cz | 0x100; // N=0 H=0 + WRITE_MEM( this, RP.hl, cz ); + goto loop; + + case 0x20: case 0x21: case 0x22: case 0x23: case 0x24: case 0x25: case 0x27: // SLA r + cz = 0; + case 0x10: case 0x11: case 0x12: case 0x13: case 0x14: case 0x15: case 0x17: // RL r + cz = (cz >> 8 & 1) + (R8( data & 7 ) << 1); + goto rl_common; + + case 0x00: case 0x01: case 0x02: case 0x03: case 0x04: case 0x05: case 0x07: // RLC r + cz = R8( data & 7 ); + cz = (cz << 1) + (cz >> 7 & 1); + rl_common: + // Z=* C=* + ph = cz | 0x100; // N=0 H=0 + R8( data & 7 ) = cz; + goto loop; + + case 0x0E: // RRC (HL) + cz = READ_MEM( this, RP.hl ); + cz += cz << 8 & 0x100; + goto rr_hl_common; + + case 0x2E: // SRA (HL) + cz = READ_MEM( this, RP.hl ); + cz += cz << 1 & 0x100; + goto rr_hl_common; + + case 0x3E: // SRL (HL) + cz = 0; + case 0x1E: // RR (HL) + cz = (cz & 0x100) + READ_MEM( this, RP.hl ); + rr_hl_common: + cz = (cz << 8) + (cz >> 1); // Z=* C=* + ph = cz | 0x100; // N=0 H=0 + WRITE_MEM( this, RP.hl, cz ); + goto loop; + + case 0x08: case 0x09: case 0x0A: case 0x0B: case 0x0C: case 0x0D: case 0x0F: // RRC r + cz = R8( data & 7 ); + cz += cz << 8 & 0x100; + goto rr_common; + + case 0x28: case 0x29: case 0x2A: case 0x2B: case 0x2C: case 0x2D: case 0x2F: // SRA r + cz = R8( data & 7 ); + cz += cz << 1 & 0x100; + goto rr_common; + + case 0x38: case 0x39: case 0x3A: case 0x3B: case 0x3C: case 0x3D: case 0x3F: // SRL r + cz = 0; + case 0x18: case 0x19: case 0x1A: case 0x1B: case 0x1C: case 0x1D: case 0x1F: // RR r + cz = (cz & 0x100) + R8( data & 7 ); + rr_common: + cz = (cz << 8) + (cz >> 1); // Z=* C=* + ph = cz | 0x100; // N=0 H=0 + R8( data & 7 ) = cz; + goto loop; + + } // CB op + assert( false ); // unhandled CB op + + case 0x07: // RLCA + cz = RG.a >> 7; + goto rlc_common; + case 0x17: // RLA + cz = cz >> 8 & 1; + rlc_common: + cz += RG.a << 1; + ph = cz | 0x100; + RG.a = BYTE( cz ); + cz |= 1; + goto loop; + + case 0x0F: // RRCA + ph = RG.a << 8; + goto rrc_common; + case 0x1F: // RRA + ph = cz; + rrc_common: + cz = (RG.a << 8) + 1; // Z=0 C=* + RG.a = ((ph & 0x100) + RG.a) >> 1; + ph = 0x100; // N=0 H=0 + goto loop; + +// Load + + case 0x70: // LD (HL),B + case 0x71: // LD (HL),C + case 0x72: // LD (HL),D + case 0x73: // LD (HL),E + case 0x74: // LD (HL),H + case 0x75: // LD (HL),L + case 0x77: // LD (HL),A + op = R8( op & 7 ); + write_hl_op_ff: + WRITE_MEM( this, RP.hl, op ); + goto loop; + + case 0x41: case 0x42: case 0x43: case 0x44: case 0x45: case 0x47: // LD r,r + case 0x48: case 0x4A: case 0x4B: case 0x4C: case 0x4D: case 0x4F: + case 0x50: case 0x51: case 0x53: case 0x54: case 0x55: case 0x57: + case 0x58: case 0x59: case 0x5A: case 0x5C: case 0x5D: case 0x5F: + case 0x60: case 0x61: case 0x62: case 0x63: case 0x65: case 0x67: + case 0x68: case 0x69: case 0x6A: case 0x6B: case 0x6C: case 0x6F: + case 0x78: case 0x79: case 0x7A: case 0x7B: case 0x7C: case 0x7D: + R8( op >> 3 & 7 ) = R8( op & 7 ); + goto loop; + + case 0x08: // LD IND16,SP + data = GET_ADDR(); + pc += 2; + WRITE_MEM( this, data, sp ); + data++; + WRITE_MEM( this, data, (sp >> 8) ); + goto loop; + + case 0xF9: // LD SP,HL + sp = RP.hl; + goto loop; + + case 0x31: // LD SP,IMM + sp = GET_ADDR(); + pc += 2; + goto loop; + + case 0x01: // LD BC,IMM + case 0x11: // LD DE,IMM + R16( (unsigned) op >> 4 ) = GET_ADDR(); + pc += 2; + goto loop; + + case 0xE2: // LD (0xFF00+C),A + WRITE_IO( this, RG.c, RG.a ); + goto loop; + + case 0xE0: // LD (0xFF00+imm),A + pc++; + WRITE_IO( this, data, RG.a ); + goto loop; + + { + int temp; + case 0x32: // LD (HL-),A + temp = RP.hl; + RP.hl = temp - 1; + goto write_data_rg_a; + + case 0x02: // LD (BC),A + temp = RP.bc; + goto write_data_rg_a; + + case 0x12: // LD (DE),A + temp = RP.de; + goto write_data_rg_a; + + case 0x22: // LD (HL+),A + temp = RP.hl; + RP.hl = temp + 1; + goto write_data_rg_a; + + case 0xEA: // LD IND16,A (common) + temp = GET_ADDR(); + pc += 2; + write_data_rg_a: + WRITE_MEM( this, temp, RG.a ); + goto loop; + } + + case 0x06: // LD B,IMM + RG.b = data; + pc++; + goto loop; + + case 0x0E: // LD C,IMM + RG.c = data; + pc++; + goto loop; + + case 0x16: // LD D,IMM + RG.d = data; + pc++; + goto loop; + + case 0x1E: // LD E,IMM + RG.e = data; + pc++; + goto loop; + + case 0x26: // LD H,IMM + RG.h = data; + pc++; + goto loop; + + case 0x2E: // LD L,IMM + RG.l = data; + pc++; + goto loop; + + case 0x36: // LD (HL),IMM + WRITE_MEM( this, RP.hl, data ); + pc++; + goto loop; + + case 0x3E: // LD A,IMM + RG.a = data; + pc++; + goto loop; + +// Increment/decrement + + case 0x03: // INC BC + case 0x13: // INC DE + case 0x23: // INC HL + R16( (unsigned) op >> 4 )++; + goto loop; + + case 0x33: // INC SP + sp = WORD( sp + 1 ); + goto loop; + + case 0x0B: // DEC BC + case 0x1B: // DEC DE + case 0x2B: // DEC HL + R16( (unsigned) op >> 4 )--; + goto loop; + + case 0x3B: // DEC SP + sp = WORD( sp - 1 ); + goto loop; + + case 0x34: // INC (HL) + op = RP.hl; + data = READ_MEM( this, op ); + data++; + WRITE_MEM( this, op, data ); + goto inc_comm; + + case 0x04: // INC B + case 0x0C: // INC C (common) + case 0x14: // INC D + case 0x1C: // INC E + case 0x24: // INC H + case 0x2C: // INC L + case 0x3C: // INC A + op = op >> 3 & 7; + data = R8( op ) + 1; + R8( op ) = data; + inc_comm: + ph = data - 0x101; // N=0 H=* + cz = (cz & 0x100) + BYTE( data ); // C=- Z=* + goto loop; + + case 0x35: // DEC (HL) + op = RP.hl; + data = READ_MEM( this, op ); + data--; + WRITE_MEM( this, op, data ); + goto dec_comm; + + case 0x05: // DEC B + case 0x0D: // DEC C + case 0x15: // DEC D + case 0x1D: // DEC E + case 0x25: // DEC H + case 0x2D: // DEC L + case 0x3D: // DEC A + op = op >> 3 & 7; + data = R8( op ) - 1; + R8( op ) = data; + dec_comm: + ph = data + 1; // N=1 H=* + cz = (cz & 0x100) + BYTE( data ); // C=- Z=* + goto loop; + +// Add 16-bit + + case 0xF8: // LD HL,SP+n + case 0xE8:{// ADD SP,n + pc++; + int t = WORD( sp + SBYTE( data ) ); + cz = ((BYTE( sp ) + data) & 0x100) + 1; // Z=0 C=* + ph = (sp ^ data ^ t) | 0x100; // N=0 H=* + if ( op == 0xF8 ) + { + RP.hl = t; + goto loop; + } + sp = t; + goto loop; + } + + case 0x39: // ADD HL,SP + data = sp; + goto add_hl_comm; + + case 0x09: // ADD HL,BC + case 0x19: // ADD HL,DE + case 0x29: // ADD HL,HL + data = R16( (unsigned) op >> 4 ); + add_hl_comm: + ph = RP.hl ^ data; + data += RP.hl; + RP.hl = WORD( data ); + ph ^= data; + cz = BYTE( cz ) + (data >> 8 & 0x100); // C=* Z=- + ph = ((ph >> 8) ^ cz) | 0x100; // N=0 H=* + goto loop; + + case 0x86: // ADD (HL) + data = READ_MEM( this, RP.hl ); + goto add_comm; + + case 0x80: // ADD B + case 0x81: // ADD C + case 0x82: // ADD D + case 0x83: // ADD E + case 0x84: // ADD H + case 0x85: // ADD L + case 0x87: // ADD A + data = R8( op & 7 ); + goto add_comm; + + case 0xC6: // ADD IMM + pc++; + add_comm: + ph = (RG.a ^ data) | 0x100; // N=1 H=* + cz = RG.a + data; // C=* Z=* + RG.a = cz; + goto loop; + +// Add/Subtract + + case 0x8E: // ADC (HL) + data = READ_MEM( this, RP.hl ); + goto adc_comm; + + case 0x88: // ADC B + case 0x89: // ADC C + case 0x8A: // ADC D + case 0x8B: // ADC E + case 0x8C: // ADC H + case 0x8D: // ADC L + case 0x8F: // ADC A + data = R8( op & 7 ); + goto adc_comm; + + case 0xCE: // ADC IMM + pc++; + adc_comm: + ph = (RG.a ^ data) | 0x100; // N=1 H=* + cz = RG.a + data + (cz >> 8 & 1); // C=* Z=* + RG.a = cz; + goto loop; + + case 0x96: // SUB (HL) + data = READ_MEM( this, RP.hl ); + goto sub_comm; + + case 0x90: // SUB B + case 0x91: // SUB C + case 0x92: // SUB D + case 0x93: // SUB E + case 0x94: // SUB H + case 0x95: // SUB L + case 0x97: // SUB A + data = R8( op & 7 ); + goto sub_comm; + + case 0xD6: // SUB IMM + pc++; + sub_comm: + ph = RG.a ^ data; // N=1 H=* + cz = RG.a - data; // C=* Z=* + RG.a = cz; + goto loop; + + case 0x9E: // SBC (HL) + data = READ_MEM( this, RP.hl ); + goto sbc_comm; + + case 0x98: // SBC B + case 0x99: // SBC C + case 0x9A: // SBC D + case 0x9B: // SBC E + case 0x9C: // SBC H + case 0x9D: // SBC L + case 0x9F: // SBC A + data = R8( op & 7 ); + goto sbc_comm; + + case 0xDE: // SBC IMM + pc++; + sbc_comm: + ph = RG.a ^ data; // N=1 H=* + cz = RG.a - data - (cz >> 8 & 1); // C=* Z=* + RG.a = cz; + goto loop; + +// Logical + + case 0xA0: // AND B + case 0xA1: // AND C + case 0xA2: // AND D + case 0xA3: // AND E + case 0xA4: // AND H + case 0xA5: // AND L + data = R8( op & 7 ); + goto and_comm; + + case 0xA6: // AND (HL) + data = READ_MEM( this, RP.hl ); + goto and_comm; + case 0xE6: // AND IMM + pc++; + and_comm: + cz = RG.a & data; // C=0 Z=* + ph = ~cz; // N=0 H=1 + RG.a = cz; + goto loop; + + case 0xA7: // AND A + cz = RG.a; // C=0 Z=* + ph = ~RG.a; // N=0 H=1 + goto loop; + + case 0xB0: // OR B + case 0xB1: // OR C + case 0xB2: // OR D + case 0xB3: // OR E + case 0xB4: // OR H + case 0xB5: // OR L + data = R8( op & 7 ); + goto or_comm; + + case 0xB6: // OR (HL) + data = READ_MEM( this, RP.hl ); + goto or_comm; + case 0xF6: // OR IMM + pc++; + or_comm: + cz = RG.a | data; // C=0 Z=* + ph = cz | 0x100; // N=0 H=0 + RG.a = cz; + goto loop; + + case 0xB7: // OR A + cz = RG.a; // C=0 Z=* + ph = RG.a + 0x100; // N=0 H=0 + goto loop; + + case 0xA8: // XOR B + case 0xA9: // XOR C + case 0xAA: // XOR D + case 0xAB: // XOR E + case 0xAC: // XOR H + case 0xAD: // XOR L + data = R8( op & 7 ); + goto xor_comm; + + case 0xAE: // XOR (HL) + data = READ_MEM( this, RP.hl ); + pc--; + case 0xEE: // XOR IMM + pc++; + xor_comm: + cz = RG.a ^ data; // C=0 Z=* + ph = cz + 0x100; // N=0 H=0 + RG.a = cz; + goto loop; + + case 0xAF: // XOR A + RG.a = 0; + cz = 0; // C=0 Z=* + ph = 0x100; // N=0 H=0 + goto loop; + +// Stack + + case 0xF1: // POP AF + case 0xC1: // POP BC + case 0xD1: // POP DE + case 0xE1: // POP HL (common) + data = READ_MEM( this, sp ); + R16( op >> 4 & 3 ) = data + 0x100 * READ_MEM( this, (sp + 1) ); + sp = WORD( sp + 2 ); + if ( op != 0xF1 ) + goto loop; + + SET_FLAGS( RG.a ); + RG.a = RG.flags; + goto loop; + + case 0xC5: // PUSH BC + data = RP.bc; + goto push; + + case 0xD5: // PUSH DE + data = RP.de; + goto push; + + case 0xE5: // PUSH HL + data = RP.hl; + goto push; + + case 0xF5: // PUSH AF + GET_FLAGS( data ); + data += RG.a << 8; + goto push; + +// Flow control + + case 0xFF: case 0xC7: case 0xCF: case 0xD7: // RST + case 0xDF: case 0xE7: case 0xEF: case 0xF7: + data = pc; + pc = (op & 0x38) + cpu->rst_base; + goto push; + + case 0xCC: // CALL Z + pc += 2; + if ( CC_Z() ) + goto call; + goto loop; + + case 0xD4: // CALL NC + pc += 2; + if ( CC_NC() ) + goto call; + goto loop; + + case 0xDC: // CALL C + pc += 2; + if ( CC_C() ) + goto call; + goto loop; + + case 0xC0: // RET NZ + if ( CC_NZ() ) + goto ret; + goto loop; + + case 0xD0: // RET NC + if ( CC_NC() ) + goto ret; + goto loop; + + case 0xD8: // RET C + if ( CC_C() ) + goto ret; + goto loop; + + case 0x18: // JR + BRANCH_( true, 0 ) + + case 0x30: // JR NC + BRANCH( CC_NC() ) + + case 0x38: // JR C + BRANCH( CC_C() ) + + case 0xE9: // LD PC,HL + pc = RP.hl; + goto loop; + + case 0xC3: // JP (next-most-common) + pc = GET_ADDR(); + goto loop; + + case 0xC2: // JP NZ + pc += 2; + if ( CC_NZ() ) + goto jp_taken; + time -= 4; + goto loop; + + case 0xCA: // JP Z (most common) + pc += 2; + if ( CC_Z() ) + goto jp_taken; + time -= 4; + goto loop; + + jp_taken: + pc -= 2; + pc = GET_ADDR(); + goto loop; + + case 0xD2: // JP NC + pc += 2; + if ( CC_NC() ) + goto jp_taken; + time -= 4; + goto loop; + + case 0xDA: // JP C + pc += 2; + if ( CC_C() ) + goto jp_taken; + time -= 4; + goto loop; + +// Flags + + case 0x2F: // CPL + RG.a = ~RG.a; + ph = BYTE( ~cz ); // N=1 H=1 + goto loop; + + case 0x3F: // CCF + ph = cz | 0x100; // N=0 H=0 + cz ^= 0x100; // C=* Z=- + goto loop; + + case 0x37: // SCF + ph = cz | 0x100; // N=0 H=0 + cz |= 0x100; // C=1 Z=- + goto loop; + + case 0xF3: // DI + goto loop; + + case 0xFB: // EI + goto loop; + + case 0x27:{// DAA + unsigned a = RG.a; + int h = ph ^ cz; + if ( ph & 0x100 ) + { + if ( (h & 0x10) || (a & 0x0F) > 9 ) + a += 6; + + if ( (cz & 0x100) || a > 0x9F ) + a += 0x60; + } + else + { + if ( h & 0x10 ) + a = (a - 6) & 0xFF; + + if ( cz & 0x100 ) + a -= 0x60; + } + cz = (cz & 0x100) | a; // C=- Z=* + RG.a = a; + ph = (ph & 0x100) + BYTE( a ); // N=- H=0 + goto loop; + } + +// Special + + case 0x76: // HALT + case 0x10: // STOP + case 0xD3: case 0xDB: case 0xDD: // Illegal + case 0xE3: case 0xE4: case 0xEB: case 0xEC: case 0xED: // (all freeze cpu) + case 0xF4: case 0xFC: case 0xFD: + goto stop; + } + + // If this fails then an opcode isn't handled above + assert( false ); + +stop: + pc--; + + // copy state back + cpu->cpu_state_.time = time; + cpu->r.pc = pc; + cpu->r.sp = sp; + { + int t; + GET_FLAGS( t ); + RG.flags = t; + } + cpu->cpu_state = &cpu->cpu_state_; + cpu->r.rp = RP; +} -- cgit v1.2.3