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Emulator: Fix SLA/SRA/SRL opcodes: 0x26, 0x2e, 0x3e

master
Riyyi 3 years ago
parent
c396e7fcf6
commit
70778840c7
1 changed files with 13 additions and 13 deletions
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  1. 26
      src/cpu-prefix.cpp

26
src/cpu-prefix.cpp
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@ -369,7 +369,7 @@ void CPU::swap()
register_ = (register_ >> 4) | (register_ << 4); register_ = (register_ >> 4) | (register_ << 4);
// Set flags // Set flags
m_zf = register_ == 0; m_zf = (register_ == 0);
m_nf = 0; m_nf = 0;
m_hf = 0; m_hf = 0;
m_cf = 0; m_cf = 0;
@ -412,7 +412,7 @@ void CPU::rl()
register_ = (old_carry | (register_ << 1)) & 0xff; register_ = (old_carry | (register_ << 1)) & 0xff;
// Set other flags // Set other flags
m_zf = register_ == 0; m_zf = (register_ == 0);
m_nf = 0; m_nf = 0;
m_hf = 0; m_hf = 0;
}; };
@ -452,7 +452,7 @@ void CPU::rlc()
register_ = ((register_ >> 7) | (register_ << 1)) & 0xff; register_ = ((register_ >> 7) | (register_ << 1)) & 0xff;
// Set other flags // Set other flags
m_zf = register_ == 0; m_zf = (register_ == 0);
m_nf = 0; m_nf = 0;
m_hf = 0; m_hf = 0;
}; };
@ -488,13 +488,13 @@ void CPU::rr()
// Copy bit 0 into carry flag // Copy bit 0 into carry flag
uint32_t old_carry = m_cf != 0; uint32_t old_carry = m_cf != 0;
m_cf = (register_ & 0x01) == 0x01; m_cf = (register_ & 0x1) == 0x1;
// Rotate register r8 right through carry // Rotate register r8 right through carry
register_ = ((register_ >> 1) | (old_carry << 7)) & 0xff; register_ = ((register_ >> 1) | (old_carry << 7)) & 0xff;
// Set other flags // Set other flags
m_zf = register_ == 0; m_zf = (register_ == 0);
m_nf = 0; m_nf = 0;
m_hf = 0; m_hf = 0;
}; };
@ -534,7 +534,7 @@ void CPU::rrc()
register_ = ((register_ >> 1) | (register_ << 7)) & 0xff; register_ = ((register_ >> 1) | (register_ << 7)) & 0xff;
// Set other flags // Set other flags
m_zf = register_ == 0; m_zf = (register_ == 0);
m_nf = 0; m_nf = 0;
m_hf = 0; m_hf = 0;
}; };
@ -575,13 +575,13 @@ void CPU::sla()
// r8 // r8
// Copy bit 7 into carry flag // Copy bit 7 into carry flag
m_cf = (m_a & 0x80) == 0x80; m_cf = (register_ & 0x80) == 0x80;
// Shift Left Arithmetically register r8 // Shift Left Arithmetically register r8
register_ = (register_ << 1) & 0xff; register_ = (register_ << 1) & 0xff;
// Set other flags // Set other flags
m_zf = register_ == 0; m_zf = (register_ == 0);
m_nf = 0; m_nf = 0;
m_hf = 0; m_hf = 0;
}; };
@ -623,13 +623,13 @@ void CPU::sra()
// └──┘ // └──┘
// Copy bit 0 into carry flag // Copy bit 0 into carry flag
m_cf = (m_a & 0x01) == 0x01; m_cf = (register_ & 0x1) == 0x1;
// Shift Right Arithmatically register r8 // Shift Right Arithmatically register r8
register_ = (register_ >> 1) | (register_ & 0x80); // Note: bit 7 remains register_ = (register_ >> 1) | (register_ & 0x80); // Note: bit 7 remains
// Set other flags // Set other flags
m_zf = register_ == 0; m_zf = (register_ == 0);
m_nf = 0; m_nf = 0;
m_hf = 0; m_hf = 0;
}; };
@ -670,13 +670,13 @@ void CPU::srl()
// r8 // r8
// Copy bit 0 into carry flag // Copy bit 0 into carry flag
m_cf = (m_a & 0x01) == 0x01; m_cf = (register_ & 0x1) == 0x1;
// Shift Right Locically register r8 // Shift Right Locically register r8
register_ = (register_ >> 1) & 0x7f; // Note: bit 7 is set to 0 register_ = (register_ >> 1) & 0x7f; // Note: bit 7 is set to 0
// Set other flags // Set other flags
m_zf = register_ == 0; m_zf = (register_ == 0);
m_nf = 0; m_nf = 0;
m_hf = 0; m_hf = 0;
}; };
@ -692,7 +692,7 @@ void CPU::srl()
case 0x3e: /* SRL (HL) */ { case 0x3e: /* SRL (HL) */ {
m_wait_cycles += 8; // + 8 = 16 total m_wait_cycles += 8; // + 8 = 16 total
// Rotate the byte pointed to by HL right // Shift right logically the byte pointed to by HL
uint32_t data = read(hl()); uint32_t data = read(hl());
shift_right_logically(data); shift_right_logically(data);
write(hl(), data); write(hl(), data);

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