core/insn_add_sp_imm8.v

   1 `define INSN_ADD_SP_IMM8                9'b011101000
   2
   3 `ifdef EXECUTE
   4         `INSN_ADD_SP_IMM8: begin
   5                 case (cycle)
   6                 0:      begin
   7                                 `EXEC_INC_PC
   8                         end
   9                 1:      begin
  10                                 `EXEC_READ(`_PC)
  11                         end
  12                 3:      begin
  13                                 `EXEC_NEWCYCLE
  14                                 `EXEC_INC_PC
  15                         end
  16                 endcase
  17         end
  18 `endif
  19
  20 `ifdef WRITEBACK
  21         `INSN_ADD_SP_IMM8: begin
  22                 case (cycle)
  23                 2:      begin
  24                                 `_SP <= `_SP + {rdata[7] ? 8'hFF : 8'h00, rdata};
  25                                 `_F <= {
  26                                         2'b00,
  27                                         (({1'b0,`_SPL[3:0]} + {1'b0,rdata[3:0]}) & 5'h10) ? 1'b1 : 1'b0,
  28                                         (({1'b0,`_SPL} + {1'b0,rdata}) & 9'h100) ? 1'b1 : 1'b0,
  29                                         `_F[3:0]
  30                                         };
  31                         end
  32                 endcase
  33         end
  34 `endif