1 files changed, 164 insertions, 0 deletions
diff --git a/src/display.rs b/src/display.rs
new file mode 100644
index 0000000..39a7943
--- /dev/null
+++ b/src/display.rs
@@ -0,0 +1,164 @@
+use core::fmt;
+
+impl fmt::Display for crate::Instruction {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", self.opcode)?;
+        for i in 0..self.operand_count {
+            f.write_str(" ")?;
+            write!(f, "{:?}", self.operands[i as usize])?;
+            if i + 1 < self.operand_count {
+                f.write_str(",")?;
+            }
+        }
+        Ok(())
+    }
+}
+
+impl fmt::Debug for crate::Operand {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        <crate::Operand as fmt::Display>::fmt(self, f)
+    }
+}
+
+impl fmt::Display for crate::Operand {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        use crate::Operand::*;
+        match self {
+            Nothing => { Ok(()) },
+            BranchAbsU17 { addr } => {
+                if addr < &10 {
+                    write!(f, "{}", addr)
+                } else {
+                    write!(f, "0x{:x}", addr)
+                }
+            }
+            BranchRelU12 { rel } => {
+                if rel < &10 {
+                    write!(f, "$+{}", rel)
+                } else {
+                    write!(f, "$+0x{:x}", rel)
+                }
+            }
+            ImmU8 { imm } => {
+                write!(f, "#{:02x}h", imm)
+            }
+            ImmU16 { imm } => {
+                write!(f, "#{:04x}h", imm)
+            }
+            AbsU16 { addr } => {
+                write!(f, "{:04x}h", addr)
+            }
+            BitIndex { index } => {
+                write!(f, "{}", index)
+            }
+            IndirectReg { n } => {
+                write!(f, "[R{}]", n)
+            }
+            IndirectRegPlusC { n } => {
+                write!(f, "[R{}, C]", n)
+            }
+            R0Offset { off } => {
+                if off < &10 {
+                    write!(f, "[{}]", off)
+                } else {
+                    write!(f, "[{:x}h]", off)
+                }
+            }
+        }
+    }
+}
+
+impl fmt::Debug for crate::Opcode {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        <crate::Opcode as fmt::Display>::fmt(self, f)
+    }
+}
+
+impl fmt::Display for crate::Opcode {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        use crate::Opcode::*;
+        match self {
+            ADD => f.write_str("add"),
+            ADDC => f.write_str("addc"),
+            ADDDC => f.write_str("adddc"),
+            AND => f.write_str("and"),
+            BE => f.write_str("be"),
+            BN => f.write_str("bn"),
+            BNE => f.write_str("bne"),
+            BNM => f.write_str("bnm"),
+            BNZ => f.write_str("bnz"),
+            BNZW => f.write_str("bnzw"),
+            BP => f.write_str("bp"),
+            BPC => f.write_str("bpc"),
+            BPM => f.write_str("bpm"),
+            BR => f.write_str("br"),
+            BZ => f.write_str("bz"),
+            CALL => f.write_str("call"),
+            CLR1 => f.write_str("clr1"),
+            CLR1M => f.write_str("clr1m"),
+            DBNZ => f.write_str("dbnz"),
+            DBZ => f.write_str("dbz"),
+            DEC => f.write_str("dec"),
+            DECL => f.write_str("decl"),
+            DECW => f.write_str("decw"),
+            DIV16 => f.write_str("div16"),
+            DIV24 => f.write_str("div24"),
+            FADD => f.write_str("fadd"),
+            FADDC => f.write_str("faddc"),
+            FADDCW => f.write_str("faddcw"),
+            FADDW => f.write_str("faddw"),
+            FAND => f.write_str("fand"),
+            FANDW => f.write_str("fandw"),
+            FNOR => f.write_str("fnor"),
+            FNORW => f.write_str("fnorw"),
+            FOR => f.write_str("for"),
+            FORW => f.write_str("forw"),
+            FSUB => f.write_str("fsub"),
+            FSUBC => f.write_str("fsubc"),
+            FSUBCW => f.write_str("fsubcw"),
+            FSUBW => f.write_str("fsubw"),
+            FXOR => f.write_str("fxor"),
+            FXORW => f.write_str("fxorw"),
+            INC => f.write_str("inc"),
+            INCL => f.write_str("incl"),
+            INCW => f.write_str("incw"),
+            JMP => f.write_str("jmp"),
+            LD => f.write_str("ld"),
+            LDCW => f.write_str("ldcw"),
+            LDW => f.write_str("ldw"),
+            LDX => f.write_str("ldx"),
+            MOV => f.write_str("mov"),
+            MUL16 => f.write_str("mul16"),
+            MUL24 => f.write_str("mul24"),
+            NOP => f.write_str("nop"),
+            NOT1 => f.write_str("not1"),
+            NOT1M => f.write_str("not1m"),
+            OR => f.write_str("or"),
+            POP => f.write_str("pop"),
+            POPW => f.write_str("popw"),
+            POP_BA => f.write_str("pop_ba"),
+            POP_P => f.write_str("pop_p"),
+            PUHS_BA => f.write_str("puhs_ba"),
+            PUSH => f.write_str("push"),
+            PUSHW => f.write_str("pushw"),
+            PUSH_P => f.write_str("push_p"),
+            RCALL => f.write_str("rcall"),
+            RCALLA => f.write_str("rcalla"),
+            RET => f.write_str("ret"),
+            RETI => f.write_str("reti"),
+            ROL => f.write_str("rol"),
+            ROLC => f.write_str("rolc"),
+            ROR => f.write_str("ror"),
+            RORC => f.write_str("rorc"),
+            SET1 => f.write_str("set1"),
+            SET1M => f.write_str("set1m"),
+            ST => f.write_str("st"),
+            STW => f.write_str("stw"),
+            STX => f.write_str("stx"),
+            SUB => f.write_str("sub"),
+            SUBC => f.write_str("subc"),
+            XCH => f.write_str("xch"),
+            XCHW => f.write_str("xchw"),
+        }
+    }
+}