Implement disassembler

util/vbu.c

@@ -0,0 +1,65 @@
+#ifndef VBUAPI
+#define VBUAPI
+#endif
+#include <stdio.h>
+#include <string.h>
+#include <vbu.h>
+
+/* Memory management */
+#ifndef VBU_REALLOC
+    #include <stdlib.h>
+    #define VBU_REALLOC realloc
+#else
+    extern void* VBU_REALLOC(void *, size_t);
+#endif
+
+
+
+/***************************** Library Functions *****************************/
+
+/* Sign-extend an integer of variable width */
+static int32_t SignExtend(int32_t value, int32_t bits) {
+    #ifndef VB_SIGNED_PROPAGATE
+        value &= ~((uint32_t) 0xFFFFFFFF << bits);
+        bits   = (int32_t) 1 << (bits - (int32_t) 1);
+        return (value ^ bits) - bits;
+    #else
+        return value << (32 - bits) >> (32 - bits);
+    #endif
+}
+
+
+
+/******************************** Sub-Modules ********************************/
+
+#include "disassembler.c"
+
+
+
+/******************************* API Commands ********************************/
+
+/* Initialize disassembler options with default settings */
+VBUAPI VBU_DasmConfig* vbuDasmInit(VBU_DasmConfig *config) {
+    config->bcondNotation     = VBU_JOINED;
+    config->conditionCase     = VBU_LOWER;
+    config->conditionCL       = VBU_L;
+    config->conditionEZ       = VBU_Z;
+    config->conditionNotation = VBU_NAMES;
+    config->hexCase           = VBU_UPPER;
+    config->hexNotation       = VBU_0X;
+    config->memoryNotation    = VBU_OUTSIDE;
+    config->mnemonicCase      = VBU_UPPER;
+    config->operandOrder      = VBU_DEST_LAST;
+    config->programCase       = VBU_LOWER;
+    config->programNotation   = VBU_NAMES;
+    config->setfNotation      = VBU_SPLIT;
+    config->systemCase        = VBU_LOWER;
+    config->systemNotation    = VBU_NAMES;
+    return config;
+}
+
+/* Disassemble from a simulation */
+VBUAPI VBU_DasmLine* vbuDisassemble(VB *sim, uint32_t address,
+    VBU_DasmConfig *config, unsigned length, int line) {
+    return dasmDisassemble(sim, address, config, length, line);
+}