riscv/rocc.cc

   1 #include "rocc.h"
   2 #include "trap.h"
   3 #include <cstdlib>
   4
   5 union rocc_insn_union_t
   6 {
   7   rocc_insn_t r;
   8   insn_t i;
   9 };
  10
  11 #define customX(n) \
  12   static reg_t c##n(processor_t* p, insn_t insn, reg_t pc) \
  13   { \
  14     rocc_t* rocc = static_cast<rocc_t*>(p->get_extension()); \
  15     rocc_insn_union_t u; \
  16     u.i = insn; \
  17     reg_t xs1 = u.r.xs1 ? RS1 : -1; \
  18     reg_t xs2 = u.r.xs1 ? RS2 : -1; \
  19     reg_t xd = rocc->custom##n(u.r, xs1, xs2); \
  20     if (u.r.xd) \
  21       WRITE_RD(xd); \
  22     return pc+4; \
  23   } \
  24   \
  25   reg_t rocc_t::custom##n(rocc_insn_t insn, reg_t xs1, reg_t xs2) \
  26   { \
  27     illegal_instruction(); \
  28     return 0; \
  29   }
  30
  31 customX(0)
  32 customX(1)
  33 customX(2)
  34 customX(3)
  35
  36 std::vector<insn_desc_t> rocc_t::get_instructions()
  37 {
  38   std::vector<insn_desc_t> insns;
  39   insns.push_back((insn_desc_t){0x0b, 0x7f, &::illegal_instruction, c0});
  40   insns.push_back((insn_desc_t){0x0f, 0x7f, &::illegal_instruction, c1});
  41   insns.push_back((insn_desc_t){0x5b, 0x7f, &::illegal_instruction, c2});
  42   insns.push_back((insn_desc_t){0x7b, 0x7f, &::illegal_instruction, c3});
  43   return insns;
  44 }