Move the core to core/

[fpgaboy.git] / insn_alu8.v

diff --git a/insn_alu8.v b/insn_alu8.v
deleted file mode 100644 (file)
index 2921b18..0000000
--- a/insn_alu8.v
+++ /dev/null
@@ -1,101 +0,0 @@
-`ifdef EXECUTE
-       `INSN_ALU8,`INSN_ALU8IMM: begin
-               if ((opcode[7:6] == 2'b11) && (cycle == 0)) begin       // alu8imm
-                       `EXEC_INC_PC
-                       `EXEC_READ(`_PC + 1)
-               end else if ((opcode[2:0] == `INSN_reg_dHL) && (cycle == 0))
-                       `EXEC_READ(`_HL)
-               else begin
-                       `EXEC_NEWCYCLE
-                       `EXEC_INC_PC
-                       case (opcode[2:0])
-                       `INSN_reg_A:    tmp <= `_A;
-                       `INSN_reg_B:    tmp <= `_B;
-                       `INSN_reg_C:    tmp <= `_C;
-                       `INSN_reg_D:    tmp <= `_D;
-                       `INSN_reg_E:    tmp <= `_E;
-                       `INSN_reg_H:    tmp <= `_H;
-                       `INSN_reg_L:    tmp <= `_L;
-                       `INSN_reg_dHL:  tmp <= rdata;
-                       endcase
-               end
-       end
-`endif
-
-`ifdef WRITEBACK
-       `INSN_ALU8,`INSN_ALU8IMM: begin
-               if (((opcode[2:0] == `INSN_reg_dHL) || (opcode[7:6] == 2'b11)) && (cycle == 0)) begin
-                       /* Sit on our asses. */
-               end else begin          /* Actually do the computation! */
-                       case (opcode[5:3])
-                       `INSN_alu_ADD: begin
-                               `_A <= `_A + tmp;
-                               `_F <=  { /* Z */ ((`_A + tmp) == 8'b0) ? 1'b1 : 1'b0,
-                                         /* N */ 1'b0,
-                                         /* H */ (({1'b0,`_A[3:0]} + {1'b0,tmp[3:0]}) >> 4 == 1) ? 1'b1 : 1'b0,
-                                         /* C */ (({1'b0,`_A} + {1'b0,tmp}) >> 8 == 1) ? 1'b1 : 1'b0,
-                                         `_F[3:0]
-                                       };
-                       end
-                       `INSN_alu_ADC: begin
-                               `_A <= `_A + tmp + {7'b0,`_F[4]};
-                               `_F <=  { /* Z */ ((`_A + tmp + {7'b0,`_F[4]}) == 8'b0) ? 1'b1 : 1'b0,
-                                         /* N */ 1'b0,
-                                         /* H */ (({1'b0,`_A[3:0]} + {1'b0,tmp[3:0]} + {4'b0,`_F[4]}) >> 4 == 1) ? 1'b1 : 1'b0,
-                                         /* C */ (({1'b0,`_A} + {1'b0,tmp} + {8'b0,`_F[4]}) >> 8 == 1) ? 1'b1 : 1'b0,
-                                         `_F[3:0]
-                                       };
-                       end
-                       `INSN_alu_SUB: begin
-                               `_A <= `_A - tmp;
-                               `_F <=  { /* Z */ (`_A == tmp) ? 1'b1 : 1'b0,
-                                         /* N */ 1'b1,
-                                         /* H */ (tmp[3:0] > `_A[3:0]) ? 1'b1 : 1'b0,
-                                         /* C */ (tmp > `_A) ? 1'b1 : 1'b0,
-                                         `_F[3:0]
-                                       };
-                       end
-                       `INSN_alu_SBC: begin
-                               `_A <= `_A - (tmp + {7'b0,`_F[4]});
-                               `_F <=  { /* Z */ ((`_A - (tmp + {7'b0,`_F[4]})) == 8'b0) ? 1'b1 : 1'b0,
-                                         /* N */ 1'b1,
-                                         /* H */ (({1'b0,tmp[3:0]} + {4'b0,`_F[4]}) > {1'b0,`_A[3:0]}) ? 1'b1 : 1'b0,
-                                         /* C */ (({1'b0,tmp} + {8'b0,`_F[4]}) > {1'b0,`_A[7:0]}) ? 1'b1 : 1'b0,
-                                         `_F[3:0]
-                                       };
-                       end
-                       `INSN_alu_AND: begin
-                               `_A <= `_A & tmp;
-                               `_F <=  { /* Z */ ((`_A & tmp) == 0) ? 1'b1 : 1'b0,
-                                         3'b010,
-                                         `_F[3:0]
-                                       };
-                       end
-                       `INSN_alu_OR: begin
-                               `_A <= `_A | tmp;
-                               `_F <=  { /* Z */ ((`_A | tmp) == 0) ? 1'b1 : 1'b0,
-                                         3'b000,
-                                         `_F[3:0]
-                                       };
-                       end
-                       `INSN_alu_XOR: begin
-                               `_A <= `_A ^ tmp;
-                               `_F <=  { /* Z */ ((`_A ^ tmp) == 0) ? 1'b1 : 1'b0,
-                                         3'b000,
-                                         `_F[3:0]
-                                       };
-                       end
-                       `INSN_alu_CP: begin
-                               `_F <=  { /* Z */ (`_A == tmp) ? 1'b1 : 1'b0,
-                                         /* N */ 1'b1,
-                                         /* H */ (tmp[3:0] > `_A[3:0]) ? 1'b1 : 1'b0,
-                                         /* C */ (tmp > `_A) ? 1'b1 : 1'b0,
-                                         `_F[3:0]
-                                       };
-                       end
-                       default:
-                               $stop;
-                       endcase
-               end
-       end
-`endif