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crater
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Split off jump table; implement IM and JP nn.

master
Ben Kurtovic 8 年之前
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deb9943b1c
共有 3 個檔案被更改，包括 1385 行新增 和 264 行删除
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  1. +1
    -1
      src/z80.c
  2. +87
    -263
      src/z80_ops.inc.c
  3. +1297
    -0
      src/z80_tables.inc.c

+ 1
- 1
src/z80.c 查看文件

@@ -257,7 +257,7 @@ bool z80_do_cycles(Z80 *z80, double cycles)
increment_refresh_counter(z80);
if (TRACE_LEVEL)
trace_instruction(z80);
cycles -= (*instruction_lookup_table[opcode])(z80, opcode);
cycles -= (*instruction_table[opcode])(z80, opcode);
}

z80->pending_cycles = -cycles;


+ 87
- 263
src/z80_ops.inc.c 查看文件

@@ -13,6 +13,14 @@
- http://www.z80.info/z80sflag.htm
*/

typedef uint8_t (*DispatchTable[256])(Z80*, uint8_t);

static DispatchTable instruction_table;
static DispatchTable instruction_table_extended;
static DispatchTable instruction_table_bits;
static DispatchTable instruction_table_index;
static DispatchTable instruction_table_index_bits;

/*
Unimplemented opcode handler.
*/
@@ -360,11 +368,35 @@ static uint8_t z80_inst_ei(Z80 *z80, uint8_t opcode)
return 4;
}

// IM 0

// IM 1
/*
IM (0xED46, 0xED4E, 0xED56, 0xED5E, 0xED66, 0xED6E, 0xED76, 0xED7E):
Set the interrupt mode.
*/
static uint8_t z80_inst_im(Z80 *z80, uint8_t opcode)
{
switch (opcode) {
case 0x46:
case 0x4E:
case 0x66:
case 0x6E:
z80->regfile.im_a = false; // Interrupt mode 0
z80->regfile.im_b = false;
break;
case 0x56:
case 0x76:
z80->regfile.im_a = true; // Interrupt mode 1
z80->regfile.im_b = false;
break;
case 0x5E:
case 0x7E:
z80->regfile.im_a = true; // Interrupt mode 2
z80->regfile.im_b = true;
break;
}

// IM 2
z80->regfile.pc++;
return 8;
}

// ADD HL, ss

@@ -448,7 +480,16 @@ static uint8_t z80_inst_inc_ss(Z80 *z80, uint8_t opcode)

// RES b, m

// JP nn
/*
JP nn (0xC3):
Jump to nn (16-bit immediate).
*/
static uint8_t z80_inst_jp_nn(Z80 *z80, uint8_t opcode)
{
(void) opcode;
z80->regfile.pc = mmu_read_double(z80->mmu, ++z80->regfile.pc);
return 10;
}

// JP cc, nn

@@ -508,261 +549,44 @@ static uint8_t z80_inst_inc_ss(Z80 *z80, uint8_t opcode)

// OTDR

static uint8_t (*instruction_lookup_table[256])(Z80*, uint8_t) = {
[0x00] = z80_inst_nop,
[0x01] = z80_inst_ld_dd_nn,
[0x02] = z80_inst_unimplemented, // TODO
[0x03] = z80_inst_inc_ss,
[0x04] = z80_inst_inc_r,
[0x05] = z80_inst_unimplemented, // TODO
[0x06] = z80_inst_ld_r_n,
[0x07] = z80_inst_unimplemented, // TODO
[0x08] = z80_inst_unimplemented, // TODO
[0x09] = z80_inst_unimplemented, // TODO
[0x0A] = z80_inst_unimplemented, // TODO
[0x0B] = z80_inst_unimplemented, // TODO
[0x0C] = z80_inst_inc_r,
[0x0D] = z80_inst_unimplemented, // TODO
[0x0E] = z80_inst_ld_r_n,
[0x0F] = z80_inst_unimplemented, // TODO
[0x10] = z80_inst_unimplemented, // TODO
[0x11] = z80_inst_ld_dd_nn,
[0x12] = z80_inst_unimplemented, // TODO
[0x13] = z80_inst_inc_ss,
[0x14] = z80_inst_inc_r,
[0x15] = z80_inst_unimplemented, // TODO
[0x16] = z80_inst_ld_r_n,
[0x17] = z80_inst_unimplemented, // TODO
[0x18] = z80_inst_unimplemented, // TODO
[0x19] = z80_inst_unimplemented, // TODO
[0x1A] = z80_inst_unimplemented, // TODO
[0x1B] = z80_inst_unimplemented, // TODO
[0x1C] = z80_inst_inc_r,
[0x1D] = z80_inst_unimplemented, // TODO
[0x1E] = z80_inst_ld_r_n,
[0x1F] = z80_inst_unimplemented, // TODO
[0x20] = z80_inst_unimplemented, // TODO
[0x21] = z80_inst_ld_dd_nn,
[0x22] = z80_inst_unimplemented, // TODO
[0x23] = z80_inst_inc_ss,
[0x24] = z80_inst_inc_r,
[0x25] = z80_inst_unimplemented, // TODO
[0x26] = z80_inst_ld_r_n,
[0x27] = z80_inst_unimplemented, // TODO
[0x28] = z80_inst_unimplemented, // TODO
[0x29] = z80_inst_unimplemented, // TODO
[0x2A] = z80_inst_unimplemented, // TODO
[0x2B] = z80_inst_unimplemented, // TODO
[0x2C] = z80_inst_inc_r,
[0x2D] = z80_inst_unimplemented, // TODO
[0x2E] = z80_inst_ld_r_n,
[0x2F] = z80_inst_unimplemented, // TODO
[0x30] = z80_inst_unimplemented, // TODO
[0x31] = z80_inst_ld_dd_nn,
[0x32] = z80_inst_unimplemented, // TODO
[0x33] = z80_inst_inc_ss,
[0x34] = z80_inst_unimplemented, // TODO
[0x35] = z80_inst_unimplemented, // TODO
[0x36] = z80_inst_unimplemented, // TODO
[0x37] = z80_inst_unimplemented, // TODO
[0x38] = z80_inst_unimplemented, // TODO
[0x39] = z80_inst_unimplemented, // TODO
[0x3A] = z80_inst_unimplemented, // TODO
[0x3B] = z80_inst_unimplemented, // TODO
[0x3C] = z80_inst_inc_r,
[0x3D] = z80_inst_unimplemented, // TODO
[0x3E] = z80_inst_ld_r_n,
[0x3F] = z80_inst_unimplemented, // TODO
[0x40] = z80_inst_ld_r_r,
[0x41] = z80_inst_ld_r_r,
[0x42] = z80_inst_ld_r_r,
[0x43] = z80_inst_ld_r_r,
[0x44] = z80_inst_ld_r_r,
[0x45] = z80_inst_ld_r_r,
[0x46] = z80_inst_ld_r_hl,
[0x47] = z80_inst_ld_r_r,
[0x48] = z80_inst_ld_r_r,
[0x49] = z80_inst_ld_r_r,
[0x4A] = z80_inst_ld_r_r,
[0x4B] = z80_inst_ld_r_r,
[0x4C] = z80_inst_ld_r_r,
[0x4D] = z80_inst_ld_r_r,
[0x4E] = z80_inst_ld_r_hl,
[0x4F] = z80_inst_ld_r_r,
[0x50] = z80_inst_ld_r_r,
[0x51] = z80_inst_ld_r_r,
[0x52] = z80_inst_ld_r_r,
[0x53] = z80_inst_ld_r_r,
[0x54] = z80_inst_ld_r_r,
[0x55] = z80_inst_ld_r_r,
[0x56] = z80_inst_ld_r_hl,
[0x57] = z80_inst_ld_r_r,
[0x58] = z80_inst_ld_r_r,
[0x59] = z80_inst_ld_r_r,
[0x5A] = z80_inst_ld_r_r,
[0x5B] = z80_inst_ld_r_r,
[0x5C] = z80_inst_ld_r_r,
[0x5D] = z80_inst_ld_r_r,
[0x5E] = z80_inst_ld_r_hl,
[0x5F] = z80_inst_ld_r_r,
[0x60] = z80_inst_ld_r_r,
[0x61] = z80_inst_ld_r_r,
[0x62] = z80_inst_ld_r_r,
[0x63] = z80_inst_ld_r_r,
[0x64] = z80_inst_ld_r_r,
[0x65] = z80_inst_ld_r_r,
[0x66] = z80_inst_ld_r_hl,
[0x67] = z80_inst_ld_r_r,
[0x68] = z80_inst_ld_r_r,
[0x69] = z80_inst_ld_r_r,
[0x6A] = z80_inst_ld_r_r,
[0x6B] = z80_inst_ld_r_r,
[0x6C] = z80_inst_ld_r_r,
[0x6D] = z80_inst_ld_r_r,
[0x6E] = z80_inst_ld_r_hl,
[0x6F] = z80_inst_ld_r_r,
[0x70] = z80_inst_unimplemented, // TODO
[0x71] = z80_inst_unimplemented, // TODO
[0x72] = z80_inst_unimplemented, // TODO
[0x73] = z80_inst_unimplemented, // TODO
[0x74] = z80_inst_unimplemented, // TODO
[0x75] = z80_inst_unimplemented, // TODO
[0x76] = z80_inst_halt,
[0x77] = z80_inst_unimplemented, // TODO
[0x78] = z80_inst_ld_r_r,
[0x79] = z80_inst_ld_r_r,
[0x7A] = z80_inst_ld_r_r,
[0x7B] = z80_inst_ld_r_r,
[0x7C] = z80_inst_ld_r_r,
[0x7D] = z80_inst_ld_r_r,
[0x7E] = z80_inst_ld_r_hl,
[0x7F] = z80_inst_ld_r_r,
[0x80] = z80_inst_unimplemented, // TODO
[0x81] = z80_inst_unimplemented, // TODO
[0x82] = z80_inst_unimplemented, // TODO
[0x83] = z80_inst_unimplemented, // TODO
[0x84] = z80_inst_unimplemented, // TODO
[0x85] = z80_inst_unimplemented, // TODO
[0x86] = z80_inst_unimplemented, // TODO
[0x87] = z80_inst_unimplemented, // TODO
[0x88] = z80_inst_unimplemented, // TODO
[0x89] = z80_inst_unimplemented, // TODO
[0x8A] = z80_inst_unimplemented, // TODO
[0x8B] = z80_inst_unimplemented, // TODO
[0x8C] = z80_inst_unimplemented, // TODO
[0x8D] = z80_inst_unimplemented, // TODO
[0x8E] = z80_inst_unimplemented, // TODO
[0x8F] = z80_inst_unimplemented, // TODO
[0x90] = z80_inst_unimplemented, // TODO
[0x91] = z80_inst_unimplemented, // TODO
[0x92] = z80_inst_unimplemented, // TODO
[0x93] = z80_inst_unimplemented, // TODO
[0x94] = z80_inst_unimplemented, // TODO
[0x95] = z80_inst_unimplemented, // TODO
[0x96] = z80_inst_unimplemented, // TODO
[0x97] = z80_inst_unimplemented, // TODO
[0x98] = z80_inst_unimplemented, // TODO
[0x99] = z80_inst_unimplemented, // TODO
[0x9A] = z80_inst_unimplemented, // TODO
[0x9B] = z80_inst_unimplemented, // TODO
[0x9C] = z80_inst_unimplemented, // TODO
[0x9D] = z80_inst_unimplemented, // TODO
[0x9E] = z80_inst_unimplemented, // TODO
[0x9F] = z80_inst_unimplemented, // TODO
[0xA0] = z80_inst_unimplemented, // TODO
[0xA1] = z80_inst_unimplemented, // TODO
[0xA2] = z80_inst_unimplemented, // TODO
[0xA3] = z80_inst_unimplemented, // TODO
[0xA4] = z80_inst_unimplemented, // TODO
[0xA5] = z80_inst_unimplemented, // TODO
[0xA6] = z80_inst_unimplemented, // TODO
[0xA7] = z80_inst_unimplemented, // TODO
[0xA8] = z80_inst_unimplemented, // TODO
[0xA9] = z80_inst_unimplemented, // TODO
[0xAA] = z80_inst_unimplemented, // TODO
[0xAB] = z80_inst_unimplemented, // TODO
[0xAC] = z80_inst_unimplemented, // TODO
[0xAD] = z80_inst_unimplemented, // TODO
[0xAE] = z80_inst_unimplemented, // TODO
[0xAF] = z80_inst_unimplemented, // TODO
[0xB0] = z80_inst_unimplemented, // TODO
[0xB1] = z80_inst_unimplemented, // TODO
[0xB2] = z80_inst_unimplemented, // TODO
[0xB3] = z80_inst_unimplemented, // TODO
[0xB4] = z80_inst_unimplemented, // TODO
[0xB5] = z80_inst_unimplemented, // TODO
[0xB6] = z80_inst_unimplemented, // TODO
[0xB7] = z80_inst_unimplemented, // TODO
[0xB8] = z80_inst_unimplemented, // TODO
[0xB9] = z80_inst_unimplemented, // TODO
[0xBA] = z80_inst_unimplemented, // TODO
[0xBB] = z80_inst_unimplemented, // TODO
[0xBC] = z80_inst_unimplemented, // TODO
[0xBD] = z80_inst_unimplemented, // TODO
[0xBE] = z80_inst_unimplemented, // TODO
[0xBF] = z80_inst_unimplemented, // TODO
[0xC0] = z80_inst_unimplemented, // TODO
[0xC1] = z80_inst_unimplemented, // TODO
[0xC2] = z80_inst_unimplemented, // TODO
[0xC3] = z80_inst_unimplemented, // TODO
[0xC4] = z80_inst_unimplemented, // TODO
[0xC5] = z80_inst_unimplemented, // TODO
[0xC6] = z80_inst_unimplemented, // TODO
[0xC7] = z80_inst_unimplemented, // TODO
[0xC8] = z80_inst_unimplemented, // TODO
[0xC9] = z80_inst_unimplemented, // TODO
[0xCA] = z80_inst_unimplemented, // TODO
[0xCB] = z80_inst_unimplemented, // TODO
[0xCC] = z80_inst_unimplemented, // TODO
[0xCD] = z80_inst_unimplemented, // TODO
[0xCE] = z80_inst_unimplemented, // TODO
[0xCF] = z80_inst_unimplemented, // TODO
[0xD0] = z80_inst_unimplemented, // TODO
[0xD1] = z80_inst_unimplemented, // TODO
[0xD2] = z80_inst_unimplemented, // TODO
[0xD3] = z80_inst_unimplemented, // TODO
[0xD4] = z80_inst_unimplemented, // TODO
[0xD5] = z80_inst_unimplemented, // TODO
[0xD6] = z80_inst_unimplemented, // TODO
[0xD7] = z80_inst_unimplemented, // TODO
[0xD8] = z80_inst_unimplemented, // TODO
[0xD9] = z80_inst_exx,
[0xDA] = z80_inst_unimplemented, // TODO
[0xDB] = z80_inst_unimplemented, // TODO
[0xDC] = z80_inst_unimplemented, // TODO
[0xDD] = z80_inst_unimplemented, // TODO
[0xDE] = z80_inst_unimplemented, // TODO
[0xDF] = z80_inst_unimplemented, // TODO
[0xE0] = z80_inst_unimplemented, // TODO
[0xE1] = z80_inst_unimplemented, // TODO
[0xE2] = z80_inst_unimplemented, // TODO
[0xE3] = z80_inst_unimplemented, // TODO
[0xE4] = z80_inst_unimplemented, // TODO
[0xE5] = z80_inst_unimplemented, // TODO
[0xE6] = z80_inst_unimplemented, // TODO
[0xE7] = z80_inst_unimplemented, // TODO
[0xE8] = z80_inst_unimplemented, // TODO
[0xE9] = z80_inst_unimplemented, // TODO
[0xEA] = z80_inst_unimplemented, // TODO
[0xEB] = z80_inst_unimplemented, // TODO
[0xEC] = z80_inst_unimplemented, // TODO
[0xED] = z80_inst_unimplemented, // TODO
[0xEE] = z80_inst_unimplemented, // TODO
[0xEF] = z80_inst_unimplemented, // TODO
[0xF0] = z80_inst_unimplemented, // TODO
[0xF1] = z80_inst_unimplemented, // TODO
[0xF2] = z80_inst_unimplemented, // TODO
[0xF3] = z80_inst_di,
[0xF4] = z80_inst_unimplemented, // TODO
[0xF5] = z80_inst_unimplemented, // TODO
[0xF6] = z80_inst_unimplemented, // TODO
[0xF7] = z80_inst_unimplemented, // TODO
[0xF8] = z80_inst_unimplemented, // TODO
[0xF9] = z80_inst_unimplemented, // TODO
[0xFA] = z80_inst_unimplemented, // TODO
[0xFB] = z80_inst_ei,
[0xFC] = z80_inst_unimplemented, // TODO
[0xFD] = z80_inst_unimplemented, // TODO
[0xFE] = z80_inst_unimplemented, // TODO
[0xFF] = z80_inst_unimplemented // TODO
};
/*
0xED:
Handle an extended instruction.
*/
static uint8_t z80_prefix_extended(Z80 *z80, uint8_t opcode)
{
opcode = mmu_read_byte(z80->mmu, ++z80->regfile.pc);
return (*instruction_table_extended[opcode])(z80, opcode);
}

/*
0xED:
Handle a bit instruction.
*/
static uint8_t z80_prefix_bits(Z80 *z80, uint8_t opcode)
{
opcode = mmu_read_byte(z80->mmu, ++z80->regfile.pc);
return (*instruction_table_bits[opcode])(z80, opcode);
}

/*
0xDD, 0xFD:
Handle an index instruction.
*/
static uint8_t z80_prefix_index(Z80 *z80, uint8_t opcode)
{
opcode = mmu_read_byte(z80->mmu, ++z80->regfile.pc);
return (*instruction_table_index[opcode])(z80, opcode);
}

/*
0xDDCB, 0xFDCB:
Handle an index-bit instruction.
*/
static uint8_t z80_prefix_index_bits(Z80 *z80, uint8_t opcode)
{
opcode = mmu_read_byte(z80->mmu, ++z80->regfile.pc);
return (*instruction_table_index_bits[opcode])(z80, opcode);
}

#include "z80_tables.inc.c"

+ 1297
- 0
src/z80_tables.inc.c
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