static void saturn_instruction_8(void)
{
int oper;
switch(READ_OP()) {
case 0:
saturn_instruction_80();
break;
case 1:
saturn_instruction_81();
break;
case 2: saturn_hst_clear_bits();break;
case 3: saturn_hst_bits_cleared();break;
case 4: saturn_st_clear_bit();break;
case 5: saturn_st_set_bit();break;
case 6: saturn_st_jump_bit_clear();break;
case 7: saturn_st_jump_bit_set();break;
case 8: saturn_p_not_equals(); break;
case 9: saturn_p_equals(); break;
case 0xa:
switch(oper=READ_OP()) {
case 0: case 1: case 2: case 3:
saturn_equals(reg_left[oper&3] , BEGIN_A, COUNT_A, reg_right[oper&3]);
break;
case 4: case 5: case 6: case 7:
saturn_not_equals(reg_left[oper&3] , BEGIN_A, COUNT_A, reg_right[oper&3]);
break;
case 8: case 9: case 0xa: case 0xb:
saturn_equals_zero(A+(oper&3), BEGIN_A, COUNT_A);
break;
case 0xc: case 0xd: case 0xe: case 0xf:
saturn_not_equals_zero(A+(oper&3), BEGIN_A, COUNT_A);
break;
}
break;
case 0xb:
switch(oper=READ_OP()) {
case 0: case 1: case 2: case 3:
saturn_greater(reg_left[oper&3] , BEGIN_A, COUNT_A, reg_right[oper&3]);
break;
case 4: case 5: case 6: case 7:
saturn_smaller(reg_left[oper&3] , BEGIN_A, COUNT_A, reg_right[oper&3]);
break;
case 8: case 9: case 0xa: case 0xb:
saturn_greater_equals(reg_left[oper&3], BEGIN_A, COUNT_A, reg_right[oper&3]);
break;
case 0xc: case 0xd: case 0xe: case 0xf:
saturn_smaller_equals(reg_left[oper&3], BEGIN_A, COUNT_A, reg_right[oper&3]);
break;
}
break;
case 0xc: saturn_jump((READ_OP_DIS16()+saturn.pc-4)&0xfffff,1);break;
case 0xd: saturn_jump(READ_OP_ARG20(),1);break;
case 0xe: saturn_call((READ_OP_DIS16()+saturn.pc)&0xfffff);break;
case 0xf: saturn_call(READ_OP_ARG20());break;
}
}
static void saturn_instruction_8(saturn_state *cpustate)
{
int oper, adr;
switch(READ_OP(cpustate)) {
case 0:
saturn_instruction_80(cpustate);
break;
case 1:
saturn_instruction_81(cpustate);
break;
case 2: saturn_hst_clear_bits(cpustate);break;
case 3: saturn_hst_bits_cleared(cpustate);break;
case 4: saturn_st_clear_bit(cpustate);break;
case 5: saturn_st_set_bit(cpustate);break;
case 6: saturn_st_jump_bit_clear(cpustate);break;
case 7: saturn_st_jump_bit_set(cpustate);break;
case 8: saturn_p_not_equals(cpustate); break;
case 9: saturn_p_equals(cpustate); break;
case 0xa:
switch(oper=READ_OP(cpustate)) {
case 0: case 1: case 2: case 3:
saturn_equals(cpustate, reg_left[oper&3] , BEGIN_A, COUNT_A, reg_right[oper&3]);
break;
case 4: case 5: case 6: case 7:
saturn_not_equals(cpustate, reg_left[oper&3] , BEGIN_A, COUNT_A, reg_right[oper&3]);
break;
case 8: case 9: case 0xa: case 0xb:
saturn_equals_zero(cpustate, A+(oper&3), BEGIN_A, COUNT_A);
break;
case 0xc: case 0xd: case 0xe: case 0xf:
saturn_not_equals_zero(cpustate, A+(oper&3), BEGIN_A, COUNT_A);
break;
}
break;
case 0xb:
switch(oper=READ_OP(cpustate)) {
case 0: case 1: case 2: case 3:
saturn_greater(cpustate, reg_left[oper&3] , BEGIN_A, COUNT_A, reg_right[oper&3]);
break;
case 4: case 5: case 6: case 7:
saturn_smaller(cpustate, reg_left[oper&3] , BEGIN_A, COUNT_A, reg_right[oper&3]);
break;
case 8: case 9: case 0xa: case 0xb:
saturn_greater_equals(cpustate, reg_left[oper&3], BEGIN_A, COUNT_A, reg_right[oper&3]);
break;
case 0xc: case 0xd: case 0xe: case 0xf:
saturn_smaller_equals(cpustate, reg_left[oper&3], BEGIN_A, COUNT_A, reg_right[oper&3]);
break;
}
break;
case 0xc:
adr=READ_OP_DIS16(cpustate);
saturn_jump(cpustate, (adr+cpustate->pc-4)&0xfffff,1);
break;
case 0xd:
adr=READ_OP_ARG20(cpustate);
saturn_jump(cpustate, adr,1);
break;
case 0xe:
adr=READ_OP_DIS16(cpustate);
saturn_call(cpustate, (adr+cpustate->pc)&0xfffff);
break;
case 0xf:
adr=READ_OP_ARG20(cpustate);
saturn_call(cpustate, adr);
break;
}
}