From d935d45514eafe7809f5105516b9953e68772f03 Mon Sep 17 00:00:00 2001
From: "Jakob L. Kreuze" <zerodaysfordays@sdf.lonestar.org>
Date: Fri, 27 Dec 2019 17:50:36 -0500
Subject: Implement remaining instructions.

---
 asm.myr | 77 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)

diff --git a/asm.myr b/asm.myr
index 9dcde13..52e7bc4 100644
--- a/asm.myr
+++ b/asm.myr
@@ -65,6 +65,11 @@ const parselit = {s
         |`std.Some(n): -> `Register(n)
         |`std.None: -> `Invalid
         ;;
+    elif std.isdigit((s[0] : char))
+        match std.intparsebase((s : byte[:]), 10)
+        |`std.Some(n): -> `Number(n)
+        |`std.None: -> `Label(s)
+        ;;
     elif s[0] == ('[' : byte)
         -> `DerefAddr
     elif s[0] == ('K' : byte)
@@ -230,6 +235,78 @@ const emitinstr = {p
         | _:
             -> `std.Err(std.fmt("invalid argument to SUBN: {}", p[1]))
         ;;
+    | "OR":
+        if p.len < 3
+            -> `std.Err("OR missing arguments")
+        ;;
+        match (parselit(p[1]), parselit(p[2]))
+        | (`Register(m), `Register(n)): b = `std.Some([0x80 | (m & 0x0f), ((n & 0x0f) << 1) | 0x01])
+        | _:
+            -> `std.Err(std.fmt("invalid argument to OR: {}", p[1]))
+        ;;
+    | "AND":
+        if p.len < 3
+            -> `std.Err("AND missing arguments")
+        ;;
+        match (parselit(p[1]), parselit(p[2]))
+        | (`Register(m), `Register(n)): b = `std.Some([0x80 | (m & 0x0f), ((n & 0x0f) << 1) | 0x02])
+        | _:
+            -> `std.Err(std.fmt("invalid argument to AND: {}", p[1]))
+        ;;
+    | "XOR":
+        if p.len < 3
+            -> `std.Err("XOR missing arguments")
+        ;;
+        match (parselit(p[1]), parselit(p[2]))
+        | (`Register(m), `Register(n)): b = `std.Some([0x80 | (m & 0x0f), ((n & 0x0f) << 1) | 0x03])
+        | _:
+            -> `std.Err(std.fmt("invalid argument to XOR: {}", p[1]))
+        ;;
+    | "SHR":
+        if p.len < 2
+            -> `std.Err("SHR missing arguments")
+        ;;
+        match parselit(p[1])
+        | `Register(n): `std.Some([0x80 | (n & 0x0f), 0x06])
+        | _:
+            -> `std.Err(std.fmt("invalid argument to SHR: {}", p[1]))
+        ;;
+    | "SHL":
+        if p.len < 2
+            -> `std.Err("SHL missing arguments")
+        ;;
+        match parselit(p[1])
+        | `Register(n): `std.Some([0x80 | (n & 0x0f), 0x0e])
+        | _:
+            -> `std.Err(std.fmt("invalid argument to SHL: {}", p[1]))
+        ;;
+    | "BCD":
+        if p.len < 2
+            -> `std.Err("BCD missing arguments")
+        ;;
+        match parselit(p[1])
+        | `Register(n): `std.Some([0xf0 | (n & 0x0f), 0x33])
+        | _:
+            -> `std.Err(std.fmt("invalid argument to BCD: {}", p[1]))
+        ;;
+    | "RND":
+        if p.len < 3
+            -> `std.Err("RND missing arguments")
+        ;;
+        match (parselit(p[1]), parselit(p[2]))
+        | (`Register(m), `Number(n)): b = `std.Some([0xc0 | (m & 0x0f), n & 0xff])
+        | _:
+            -> `std.Err(std.fmt("invalid argument to RND: {}", p[1]))
+        ;;
+    | "DRW":
+        if p.len < 4
+            -> `std.Err("DRW missing arguments")
+        ;;
+        match (parselit(p[1]), parselit(p[2]), parselit(p[3]))
+        | (`Register(m), `Register(n), `Number(q)): b = `std.Some([0xc0 | (m & 0x0f), (n & 0x0f) << 1 | (q & 0x0f)])
+        | _:
+            -> `std.Err(std.fmt("invalid argument to DRW: {}", p[1]))
+        ;;
     | _:
         -> `std.Err(std.fmt("unrecognized instruction {}", p[0]))
     ;;
-- 
cgit v1.3