Flattened package hierarchy

src/x64/memoryAccess.go

@@ -0,0 +1,34 @@
+package x64
+
+import "git.akyoto.dev/cli/q/src/cpu"
+
+// memoryAccess encodes a memory access.
+func memoryAccess(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(Scale1, 0b100, 0b100))
+	}
+
+	if mod == AddressMemoryOffset8 {
+		code = append(code, offset)
+	}
+
+	return code
+}