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clarified BGE/BLE/BGT (in conditional_branch_instructions)

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folkert van heusden 2022-03-20 18:17:50 +01:00
parent 70be182836
commit daa940986f
1 changed files with 3 additions and 3 deletions
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6
cpu.cpp
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@ -896,7 +896,7 @@ bool cpu::conditional_branch_instructions(const uint16_t instr)
break; break;
case 0b00000100: // BGE case 0b00000100: // BGE
take = (getPSW_n() ^ getPSW_v()) == false; take = getPSW_n() == getPSW_v();
break; break;
case 0b00000101: // BLT case 0b00000101: // BLT
@ -904,11 +904,11 @@ bool cpu::conditional_branch_instructions(const uint16_t instr)
break; break;
case 0b00000110: // BGT case 0b00000110: // BGT
take = ((getPSW_n() ^ getPSW_v()) | getPSW_z()) == false; take = getPSW_n() == getPSW_v() && getPSW_z() == false;
break; break;
case 0b00000111: // BLE case 0b00000111: // BLE
take = (getPSW_n() ^ getPSW_v()) | getPSW_z(); take = getPSW_n() != getPSW_v() | getPSW_z();
break; break;
case 0b10000000: // BPL case 0b10000000: // BPL