initial commit

1 files changed, 123 insertions, 0 deletions

diff --git a/src/display.rs b/src/display.rs
new file mode 100644
index 0000000..7864248
--- /dev/null
+++ b/src/display.rs
@@ -0,0 +1,123 @@
+use std;
+use std::fmt::{Display, Formatter};
+
+use ::{Operand, Opcode, Instruction, Width};
+
+impl Display for Instruction {
+    fn fmt(&self, f: &mut Formatter) -> Result<(), std::fmt::Error> {
+        write!(f, "{}", self.opcode)?;
+        match self.op_width {
+            Width::B => { write!(f, ".b")? },
+            Width::W => { }
+        };
+        match self.operands[0] {
+            Operand::Nothing => return Ok(()),
+            x @ _ => {
+                write!(f, " {}", x)?;
+            }
+        };
+        match self.operands[1] {
+            Operand::Nothing => return Ok(()),
+            x @ _ => {
+                write!(f, ", {}", x)?;
+            }
+        };
+        Ok(())
+    }
+}
+
+impl Display for Opcode {
+    fn fmt(&self, f: &mut Formatter) -> Result<(), std::fmt::Error> {
+        match self {
+            Opcode::Invalid(a) => { write!(f, "invalid({:04x})", a) },
+            Opcode::RRC => { write!(f, "rrc") },
+            Opcode::SWPB => { write!(f, "swpb") },
+            Opcode::RRA => { write!(f, "rra") },
+            Opcode::SXT => { write!(f, "sxt") },
+            Opcode::PUSH => { write!(f, "push") },
+            Opcode::CALL => { write!(f, "call") },
+            Opcode::RETI => { write!(f, "reti") },
+            Opcode::JNE => { write!(f, "jne") },
+            Opcode::JEQ => { write!(f, "jeq") },
+            Opcode::JNC => { write!(f, "jnc") },
+            Opcode::JC => { write!(f, "jc") },
+            Opcode::JN => { write!(f, "jn") },
+            Opcode::JGE => { write!(f, "jge") },
+            Opcode::JL => { write!(f, "jl") },
+            Opcode::JMP => { write!(f, "jmp") },
+            Opcode::MOV => { write!(f, "mov") },
+            Opcode::ADD => { write!(f, "add") },
+            Opcode::ADDC => { write!(f, "addc") },
+            Opcode::SUBC => { write!(f, "subc") },
+            Opcode::SUB => { write!(f, "sub") },
+            Opcode::CMP => { write!(f, "cmp") },
+            Opcode::DADD => { write!(f, "dadd") },
+            Opcode::BIT => { write!(f, "bit") },
+            Opcode::BIC => { write!(f, "bic") },
+            Opcode::BIS => { write!(f, "bis") },
+            Opcode::XOR => { write!(f, "xor") },
+            Opcode::AND => { write!(f, "and") }
+        }
+    }
+}
+
+
+impl Display for Operand {
+    fn fmt(&self, f: &mut Formatter) -> Result<(), std::fmt::Error> {
+        fn signed_hex(num: i16) -> String {
+            if num >= 0 {
+                format!("+{:#x}", num)
+            } else {
+                format!("-{:#x}", -num)
+            }
+        }
+        match self {
+            Operand::Register(reg) => {
+                write!(f, "R{}", reg)
+            },
+            Operand::Indexed(reg, offset) => {
+                write!(f, "{}(R{})", signed_hex(*offset as i16), reg)
+            },
+            Operand::RegisterIndirect(reg) => {
+                write!(f, "@R{}", reg)
+            },
+            Operand::IndirectAutoinc(reg) => {
+                write!(f, "@R{}+", reg)
+            },
+            Operand::Offset(offset) => {
+                write!(f, "${}", signed_hex(*offset as i16))
+            },
+            Operand::Symbolic(offset) => {
+                write!(f, "{}(PC)", signed_hex(*offset as i16))
+            },
+            Operand::Immediate(imm) => {
+                write!(f, "#0x{:x}", imm)
+            },
+            Operand::Absolute(offset) => {
+                write!(f, "&0x{:x}", offset)
+            },
+            Operand::Const4 => {
+                write!(f, "4")
+            },
+            Operand::Const8 => {
+                write!(f, "8")
+            },
+            Operand::Const0 => {
+                write!(f, "0")
+            },
+            Operand::Const1 => {
+                write!(f, "1")
+            },
+            Operand::Const2 => {
+                write!(f, "2")
+            },
+            Operand::ConstNeg1 => {
+                write!(f, "-1")
+            },
+            Operand::Nothing => {
+                write!(f, "<No Operand>")
+            }
+        }
+    }
+}
+