comment why sv_insn_t is set up the way it is; add vector loop stub

diff --git a/riscv/insn_template_sv.cc b/riscv/insn_template_sv.cc
index b83f877c7be15f94869edbfc63657ba54006609e..c3401423f2ff7934914af9520508cb9a534e93af 100644 (file)
--- a/riscv/insn_template_sv.cc
+++ b/riscv/insn_template_sv.cc
@@ -4,11 +4,26 @@ reg_t FN(processor_t* p, insn_t s_insn, reg_t pc)
 {
   int xlen = ISASZ;
   reg_t npc = sext_xlen(pc + insn_length(INSNCODE));
+  // messy way to do it: insn_t is used elsewhere in a union,
+  // so a workaround is to grab the bits from the insn_t
+  // and create an sv-variant.  also an opportunity to pass
+  // in the loop index (voffs) which will be added on to
+  // any registers that are marked as "vectorised"
   insn_bits_t bits = s_insn.bits();
+#ifndef USING_NOREGS
   int voffs = 0;
+  int vlen = 1;
   sv_insn_t insn(bits, voffs);
+  bool vectorop = false;
+  for (; voffs < vlen; voffs++)
+  {
+      #include INCLUDEFILE
+  }
+#else
+  insn_t insn(bits);
   #include INCLUDEFILE
-  trace_opcode(p, INSNCODE, s_insn);
+#endif
+  trace_opcode(p, INSNCODE, insn);
   return npc;
 }