core/insn_pop_reg.v

   1 `ifdef EXECUTE
   2         `INSN_POP_reg: begin    /* POP is 12 cycles! */
   3                 case (cycle)
   4                 0:      `EXEC_READ(`_SP)
   5                 1:      `EXEC_READ(`_SP + 1)
   6                 2:      begin
   7                                 `EXEC_NEWCYCLE
   8                                 `EXEC_INC_PC
   9                         end
  10                 endcase
  11         end
  12 `endif
  13
  14 `ifdef WRITEBACK
  15         `INSN_POP_reg: begin    /* POP is 12 cycles! */
  16                 case (cycle)
  17                 0:      begin end
  18                 1:      begin
  19                                 case (opcode[5:4])
  20                                 `INSN_stack_AF: `_F <= rdata;
  21                                 `INSN_stack_BC: `_C <= rdata;
  22                                 `INSN_stack_DE: `_E <= rdata;
  23                                 `INSN_stack_HL: `_L <= rdata;
  24                                 endcase
  25                         end
  26                 2:      begin
  27                                 case (opcode[5:4])
  28                                 `INSN_stack_AF: `_A <= rdata;
  29                                 `INSN_stack_BC: `_B <= rdata;
  30                                 `INSN_stack_DE: `_D <= rdata;
  31                                 `INSN_stack_HL: `_H <= rdata;
  32                                 endcase
  33                                 `_SP <= `_SP + 2;
  34                         end
  35                 endcase
  36         end
  37 `endif