Move architecture modules into the API repo

1 files changed, 39 insertions, 0 deletions

diff --git a/arch/arm64/disassembler/decode.c b/arch/arm64/disassembler/decode.c
new file mode 100644
index 00000000..b444bbcd
--- /dev/null
+++ b/arch/arm64/disassembler/decode.c
@@ -0,0 +1,39 @@
+#include "decode.h"
+#include "feature_flags.h"
+
+int decode_spec(context* ctx, Instruction* dec);        // from decode0.cpp
+int decode_scratchpad(context* ctx, Instruction* dec);  // from decode_scratchpad.c
+
+int aarch64_decompose(uint32_t instructionValue, Instruction* instr, uint64_t address)
+{
+	context ctx = {0};
+	ctx.halted = 1;  // enable disassembly of exception instructions like DCPS1
+	ctx.insword = instructionValue;
+	ctx.address = address;
+	ctx.features0 = ARCH_FEATURES_ALL;
+	ctx.features1 = ARCH_FEATURES_ALL;
+	ctx.EDSCR_HDE = 1;
+
+	/* have the spec-generated code populate all the pcode variables */
+	int rc = decode_spec(&ctx, instr);
+
+	if (rc != DECODE_STATUS_OK)
+	{
+		/* exceptional cases where we accept a non-OK decode status */
+		if (rc == DECODE_STATUS_END_OF_INSTRUCTION && instr->encoding == ENC_HINT_HM_HINTS)
+		{
+			while (0)
+				;
+		}
+		/* no exception! fail! */
+		else
+			return rc;
+	}
+
+	/* if UDF encoding, return undefined */
+	// if(instr->encoding == ENC_UDF_ONLY_PERM_UNDEF)
+	//	return DECODE_STATUS_UNDEFINED;
+
+	/* convert the pcode variables to list of operands, etc. */
+	return decode_scratchpad(&ctx, instr);
+}