From 1fae63de23320a1663b7c591e247ad81852ab6dc Mon Sep 17 00:00:00 2001
From: Roland Reichwein <mail@reichwein.it>
Date: Sun, 22 Nov 2020 13:00:06 +0100
Subject: Support 16-bit short

---
 asm/parse.cpp | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

(limited to 'asm/parse.cpp')

diff --git a/asm/parse.cpp b/asm/parse.cpp
index 28e79f3..a3156c2 100644
--- a/asm/parse.cpp
+++ b/asm/parse.cpp
@@ -106,6 +106,25 @@ namespace {
   return false;
  }
 
+ bool parseRegister16(const std::string& asm_code, size_t& pos, std::any& result, size_t& size_hint) {
+  parseWhitespace(asm_code, pos);
+  
+  std::regex re_name(reg_re, std::regex_constants::ECMAScript);
+
+  std::smatch match;
+  if (std::regex_search(asm_code.cbegin() + pos, asm_code.cend(), match, re_name, std::regex_constants::match_continuous)) {
+   std::string name {boost::algorithm::to_lower_copy(match[0].str())};
+   if (reg16.contains(name)) {
+    pos += name.size();
+    result = Asm::Args::Register16(name);
+    size_hint = 16;
+    return true;
+   }
+  }
+
+  return false;
+ }
+
  bool parseRegister32(const std::string& asm_code, size_t& pos, std::any& result, size_t& size_hint) {
   parseWhitespace(asm_code, pos);
   
@@ -163,6 +182,25 @@ namespace {
   return false;
  }
 
+ bool parseMem16Ptr64(const std::string& asm_code, size_t& pos, std::any& result, size_t& size_hint) {
+  parseWhitespace(asm_code, pos);
+  
+  std::regex re_name("(word ptr *)?\\[("s + reg_re + ")\\]"s, std::regex_constants::ECMAScript);
+
+  std::smatch match;
+  if (std::regex_search(asm_code.cbegin() + pos, asm_code.cend(), match, re_name, std::regex_constants::match_continuous)) {
+   std::string name {boost::algorithm::to_lower_copy(match[2].str())};
+   if (reg16.contains(name)) {
+    pos += match[0].length();
+    result = Asm::Args::Mem16Ptr64(name);
+    size_hint = 16;
+    return true;
+   }
+  }
+
+  return false;
+ }
+
  bool parseMem32Ptr64(const std::string& asm_code, size_t& pos, std::any& result, size_t& size_hint) {
   parseWhitespace(asm_code, pos);
   
@@ -283,6 +321,8 @@ namespace {
 
   if (parseRegister8(asm_code, pos, result, size_hint))
    return true;
+  if (parseRegister16(asm_code, pos, result, size_hint))
+   return true;
   if (parseRegister32(asm_code, pos, result, size_hint))
    return true;
   if (parseRegister64(asm_code, pos, result, size_hint))
@@ -290,6 +330,8 @@ namespace {
   
   if (parseMem8Ptr64(asm_code, pos, result, size_hint))
    return true;
+  if (parseMem16Ptr64(asm_code, pos, result, size_hint))
+   return true;
   if (parseMem32Ptr64(asm_code, pos, result, size_hint))
    return true;
   if (parseMem64Ptr64(asm_code, pos, result, size_hint))
-- 
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