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added helper function for flag setting on addition

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radumacocian
2025-06-30 15:08:25 +02:00
parent 5f6ee58378
commit eddfb7a0c6
2 changed files with 38 additions and 13 deletions
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19
cpu/flags.go Normal file
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@@ -0,0 +1,19 @@
package cpu
func Set8BitAddFlags(context op_context, byte1 byte, byte2 byte) byte {
result := uint16(byte1) + uint16(byte2)
halfcarry := (byte1&0x0F)+(byte2&0x0F) > 0x0F
context.cpu.SetNF(false)
context.cpu.SetHF(halfcarry)
context.cpu.SetCF(result > 0xFFFF)
return byte(result)
}
func Add16BitsAndSetFlags(context op_context, op1 uint16, op2 uint16) uint16 {
result := uint32(op1) + uint32(op2)
halfcarry := (op1&0x0FFF)+(op2&0x0FFF) > 0x0FFF
context.cpu.SetNF(false)
context.cpu.SetHF(halfcarry)
context.cpu.SetCF(result > 0xFFFF)
return uint16(result)
}