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fox32: Prevent div from modifying the carry flag

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ry755 2022-02-26 16:41:35 -08:00 committed by Ry
parent 738ccd16e8
commit 69a47b9336
1 changed files with 0 additions and 9 deletions
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9
src/cpu.rs
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@ -895,7 +895,6 @@ impl Cpu {
let result = (self.read_register(register) as u8).overflowing_div(source_value as u8); let result = (self.read_register(register) as u8).overflowing_div(source_value as u8);
self.write_register(register, (self.read_register(register) & 0xFFFFFF00) | (result.0 as u32)); self.write_register(register, (self.read_register(register) & 0xFFFFFF00) | (result.0 as u32));
self.flag.zero = result.0 == 0; self.flag.zero = result.0 == 0;
self.flag.carry = result.1;
} }
} }
Size::Half => { Size::Half => {
@ -903,7 +902,6 @@ impl Cpu {
let result = (self.read_register(register) as u16).overflowing_div(source_value as u16); let result = (self.read_register(register) as u16).overflowing_div(source_value as u16);
self.write_register(register, (self.read_register(register) & 0xFFFF0000) | (result.0 as u32)); self.write_register(register, (self.read_register(register) & 0xFFFF0000) | (result.0 as u32));
self.flag.zero = result.0 == 0; self.flag.zero = result.0 == 0;
self.flag.carry = result.1;
} }
} }
Size::Word => { Size::Word => {
@ -911,7 +909,6 @@ impl Cpu {
let result = self.read_register(register).overflowing_div(source_value); let result = self.read_register(register).overflowing_div(source_value);
self.write_register(register, result.0); self.write_register(register, result.0);
self.flag.zero = result.0 == 0; self.flag.zero = result.0 == 0;
self.flag.carry = result.1;
} }
} }
} }
@ -926,7 +923,6 @@ impl Cpu {
if should_run { if should_run {
self.bus.memory.write_8(pointer, result.0); self.bus.memory.write_8(pointer, result.0);
self.flag.zero = result.0 == 0; self.flag.zero = result.0 == 0;
self.flag.carry = result.1;
} }
} }
Size::Half => { Size::Half => {
@ -934,7 +930,6 @@ impl Cpu {
if should_run { if should_run {
self.bus.memory.write_16(pointer, result.0); self.bus.memory.write_16(pointer, result.0);
self.flag.zero = result.0 == 0; self.flag.zero = result.0 == 0;
self.flag.carry = result.1;
} }
} }
Size::Word => { Size::Word => {
@ -942,7 +937,6 @@ impl Cpu {
if should_run { if should_run {
self.bus.memory.write_32(pointer, result.0); self.bus.memory.write_32(pointer, result.0);
self.flag.zero = result.0 == 0; self.flag.zero = result.0 == 0;
self.flag.carry = result.1;
} }
} }
} }
@ -956,7 +950,6 @@ impl Cpu {
if should_run { if should_run {
self.bus.memory.write_8(pointer, result.0); self.bus.memory.write_8(pointer, result.0);
self.flag.zero = result.0 == 0; self.flag.zero = result.0 == 0;
self.flag.carry = result.1;
} }
} }
Size::Half => { Size::Half => {
@ -964,7 +957,6 @@ impl Cpu {
if should_run { if should_run {
self.bus.memory.write_16(pointer, result.0); self.bus.memory.write_16(pointer, result.0);
self.flag.zero = result.0 == 0; self.flag.zero = result.0 == 0;
self.flag.carry = result.1;
} }
} }
Size::Word => { Size::Word => {
@ -972,7 +964,6 @@ impl Cpu {
if should_run { if should_run {
self.bus.memory.write_32(pointer, result.0); self.bus.memory.write_32(pointer, result.0);
self.flag.zero = result.0 == 0; self.flag.zero = result.0 == 0;
self.flag.carry = result.1;
} }
} }
} }