riscv/insn_template_sv.cc

   1 // See LICENSE for license details.
   2
   3 reg_t FN(processor_t* p, insn_t s_insn, reg_t pc)
   4 {
   5   int xlen = ISASZ;
   6   reg_t npc = sext_xlen(pc + insn_length(INSNCODE));
   7   // messy way to do it: insn_t is used elsewhere in a union,
   8   // so a workaround is to grab the bits from the insn_t
   9   // and create an sv-variant.  also an opportunity to pass
  10   // in the loop index (voffs) which will be added on to
  11   // any registers that are marked as "vectorised"
  12   insn_bits_t bits = s_insn.bits();
  13 #ifndef USING_NOREGS
  14   int voffs = 0;
  15   int vlen = 1;
  16   sv_insn_t insn(bits, voffs);
  17   bool vectorop = false;
  18   reg_t predicate = 0;
  19   // identify which regs have had their CSR entries set as vectorised.
  20   // really could do with a macro for-loop here... oh well...
  21   // integer ops, RD, RS1, RS2, RS3 (use sv_int_tb)
  22 #ifdef USING_RD
  23   vectorop &= check_reg(true, s_insn.rd());
  24 #endif
  25 #ifdef USING_RS1
  26   vectorop &= check_reg(true, s_insn.rs1());
  27 #endif
  28 #ifdef USING_RS2
  29   vectorop &= check_reg(true, s_insn.rs2());
  30 #endif
  31 #ifdef USING_RS2
  32   vectorop &= check_reg(true, s_insn.rs3());
  33 #endif
  34   // fp ops, RD, RS1, RS2, RS3 (use sv_fp_tb)
  35 #ifdef USING_FRD
  36   vectorop &= check_reg(false, s_insn.frd());
  37 #endif
  38 #ifdef USING_FRS1
  39   vectorop &= check_reg(false, s_insn.frs1());
  40 #endif
  41 #ifdef USING_FRS2
  42   vectorop &= check_reg(false, s_insn.rs2());
  43 #endif
  44 #ifdef USING_FRS2
  45   vectorop &= check_reg(false, s_insn.rs3());
  46 #endif
  47
  48   // if vectorop is set, one of the regs is not a scalar,
  49   // so we must read the VL CSR and do a loop
  50   if (vectorop)
  51   {
  52     // TODO: vlen = p->CSR(SIMPLEV_VL); // something like that...
  53   }
  54   for (; voffs < vlen; voffs++)
  55   {
  56       #include INCLUDEFILE
  57   }
  58 #else
  59   insn_t insn(bits);
  60   #include INCLUDEFILE
  61 #endif
  62   trace_opcode(p, INSNCODE, insn);
  63   return npc;
  64 }
  65