Impl ADDX

1 files changed, 16 insertions, 3 deletions

diff --git a/disasm.cpp b/disasm.cpp
index d33f55a..63fb89c 100644
--- a/disasm.cpp
+++ b/disasm.cpp
@@ -1368,10 +1368,23 @@ static void chunk_mf000_vc000(DisasmNode &n, uint16_t i, const DataBuffer &c, co
 }
 
 static inline void disasm_addx(
-        DisasmNode &node, const uint16_t instr, const DataBuffer &code, const Settings &s)
+        DisasmNode &node, const uint16_t instr, const DataBuffer &, const Settings &)
 {
-    // TODO
-    return disasm_verbatim(node, instr, code, s);
+    const OpSize opsize = static_cast<OpSize>((instr >> 6) & 3);
+    // Already handled by parent call of `disasm_add_addx_adda`
+    assert(opsize != OpSize::kInvalid);
+    const int m = (instr >> 3) & 1;
+    const int xn = instr & 7;
+    const int xi = (instr >> 9) & 7;
+    const auto src = m ? AddrModeArg::AnAddrDecr(xn) : AddrModeArg::Dn(xn);
+    const auto dst = m ? AddrModeArg::AnAddrDecr(xi) : AddrModeArg::Dn(xi);
+    char src_str[32]{};
+    char dst_str[32]{};
+    src.SNPrint(src_str, sizeof(src_str));
+    dst.SNPrint(dst_str, sizeof(dst_str));
+    snprintf(node.mnemonic, kMnemonicBufferSize, "addx%c", suffix_from_opsize(opsize));
+    snprintf(node.arguments, kArgsBufferSize, "%s,%s", src_str, dst_str);
+    node.size = kInstructionSizeStepBytes + src.Size() + dst.Size();
 }
 
 static inline void disasm_adda(