X-Git-Url: http://git.joshuawise.com/fpgaboy.git/blobdiff_plain/77ab69d7bb0902e6ebf0994159ed2205f8413e34..b057a5d6e6db6db06ae33703ca72cd235eec91d6:/insn_alu8.v

diff --git a/insn_alu8.v b/insn_alu8.v
deleted file mode 100644
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