mirror of
https://github.com/macocianradu/goboy.git
synced 2026-03-18 13:00:07 +00:00
40 lines
1.0 KiB
Go
40 lines
1.0 KiB
Go
package cpu
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import (
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"radu.macocian.me/goboy/cpu/operations"
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)
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func Add8BitsAndSetFlags(context op_context, byte1 byte, byte2 byte) byte {
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result := uint16(byte1) + uint16(byte2)
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halfcarry := (byte1&0x0F)+(byte2&0x0F) > 0x0F
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context.cpu.SetNF(false)
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context.cpu.SetHF(halfcarry)
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context.cpu.SetCF(result > 0xFFFF)
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return byte(result)
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}
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func Add16BitsAndSetFlags(context op_context, op1 uint16, op2 uint16) uint16 {
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result := uint32(op1) + uint32(op2)
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halfcarry := (op1&0x0FFF)+(op2&0x0FFF) > 0x0FFF
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context.cpu.SetNF(false)
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context.cpu.SetHF(halfcarry)
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context.cpu.SetCF(result > 0xFFFF)
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return uint16(result)
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}
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func IncAndSetFlags(context op_context, op1 *byte) {
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halfcarry := *op1&0x0F == 0x0F
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context.cpu.SetNF(false)
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context.cpu.SetHF(halfcarry)
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context.cpu.SetZF(*op1 == byte(0))
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operations.INC(op1)
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}
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func DecAndSetFlags(context op_context, op1 *byte) {
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halfcarry := *op1&0x0F == 0x00
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context.cpu.SetZF(*op1 == byte(0))
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context.cpu.SetNF(true)
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context.cpu.SetHF(halfcarry)
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operations.DEC(op1)
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}
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