insn_call-callcc.v

   1 `ifdef EXECUTE
   2         `INSN_CALL,`INSN_CALLCC: begin
   3                 case (cycle)
   4                 0:      begin
   5                                 `EXEC_INC_PC
   6                                 `EXEC_READ(`_PC + 1)
   7                         end
   8                 1:      begin
   9                                 `EXEC_INC_PC
  10                                 `EXEC_READ(`_PC + 1)
  11                         end
  12                 2:      begin
  13                                 `EXEC_INC_PC
  14                                 if (!opcode[0]) // i.e., is callcc
  15                                         /* We need to check the condition code to bail out. */
  16                                         case (opcode[4:3])
  17                                         `INSN_cc_NZ:    if (`_F[7]) `EXEC_NEWCYCLE
  18                                         `INSN_cc_Z:     if (~`_F[7]) `EXEC_NEWCYCLE
  19                                         `INSN_cc_NC:    if (`_F[4]) `EXEC_NEWCYCLE
  20                                         `INSN_cc_C:     if (~`_F[4]) `EXEC_NEWCYCLE
  21                                         endcase
  22                         end
  23                 3:      `EXEC_WRITE(`_SP - 1, `_PCH)
  24                 4:      `EXEC_WRITE(`_SP - 2, `_PCL)
  25                 5:      `EXEC_NEWCYCLE
  26                 endcase
  27         end
  28 `endif
  29
  30 `ifdef WRITEBACK
  31         `INSN_CALL,`INSN_CALLCC: begin
  32                 case (cycle)
  33                 0:      begin /* type F */ end
  34                 1:      tmp <= rdata;   // tmp contains newpcl
  35                 2:      tmp2 <= rdata;  // tmp2 contains newpch
  36                 3:      begin /* type F */ end
  37                 4:      `_PCH <= tmp2;
  38                 5:      begin
  39                                 `_PCL <= tmp;
  40                                 `_SP <= `_SP - 2;
  41                         end
  42                 endcase
  43         end
  44 `endif