Add vbuCodeSize()

2024-11-21 18:50:31 -06:00
parent f45636a491
commit 18b2c589e6
4 changed files with 16 additions and 13 deletions
@@ -38,6 +38,12 @@ static int32_t SignExtend(int32_t value, int32_t bits) {

 /******************************* API Commands ********************************/

+/* Determine the size in bytes of an instruction */
+VBUAPI int vbuCodeSize(VB *sim, uint32_t address) {
+    int opcode = vbRead(sim, address, VB_U16) >> 10 & 63;
+    return opcode < 0x20 || opcode == 0x32 || opcode == 0x36 ? 2 : 4;
+}
+
 /* Initialize disassembler options with default settings */
 VBUAPI VBU_DasmConfig* vbuDasmInit(VBU_DasmConfig *config) {
    config->bcondNotation     = VBU_JOINED;