cli/q
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Implemented x64 memory loads

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This commit is contained in:
Eduard Urbach
2024-07-20 15:48:42 +02:00
parent 7c2e373562
commit d35c07ed1c
5 changed files with 255 additions and 87 deletions
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35
src/build/arch/x64/Store.go
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@ -8,7 +8,7 @@ import (
// StoreNumber stores a number into the memory address included in the given register.
func StoreNumber(code []byte, register cpu.Register, offset byte, numBytes byte, number int) []byte {
code = store(code, 0xC6, 0xC7, register, offset, numBytes, 0b000)
code = memoryAccess(code, 0xC6, 0xC7, register, offset, numBytes, 0b000)
switch numBytes {
case 8, 4:
@ -23,36 +23,5 @@ func StoreNumber(code []byte, register cpu.Register, offset byte, numBytes byte,
// StoreRegister stores the contents of the `source` register into the memory address included in the given register.
func StoreRegister(code []byte, register cpu.Register, offset byte, numBytes byte, source cpu.Register) []byte {
return store(code, 0x88, 0x89, register, offset, numBytes, source)
}
// store encodes a write to memory.
func store(code []byte, opCode8 byte, opCode32 byte, register cpu.Register, offset byte, numBytes byte, source cpu.Register) []byte {
if numBytes == 2 {
code = append(code, 0x66)
}
opCode := opCode32
if numBytes == 1 {
opCode = opCode8
}
mod := AddressMemory
if offset != 0 || register == RBP || register == R13 {
mod = AddressMemoryOffset8
}
code = encode(code, mod, source, register, numBytes, opCode)
if register == RSP || register == R12 {
code = append(code, SIB(0b00, 0b100, 0b100))
}
if mod == AddressMemoryOffset8 {
code = append(code, offset)
}
return code
return memoryAccess(code, 0x88, 0x89, register, offset, numBytes, source)
}