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[/] [rtf8088/] [trunk/] [rtl/] [verilog/] [STOS.v] - Blame information for rev 2

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//=============================================================================
//  STOSB,STOSW
//  Store string data to memory.
//
//
//  2009-2012 Robert Finch
//  Stratford
//  robfinch<remove>@opencores.org
//
//
// This source file is free software: you can redistribute it and/or modify 
// it under the terms of the GNU Lesser General Public License as published 
// by the Free Software Foundation, either version 3 of the License, or     
// (at your option) any later version.                                      
//                                                                          
// This source file is distributed in the hope that it will be useful,      
// but WITHOUT ANY WARRANTY; without even the implied warranty of           
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the            
// GNU General Public License for more details.                             
//                                                                          
// You should have received a copy of the GNU General Public License        
// along with this program.  If not, see <http://www.gnu.org/licenses/>.    
//
//=============================================================================
//
STOS:
`include "check_for_ints.v"
        else if (w && (di==16'hFFFF)) begin
                ir <= `NOP;
                int_num <= 8'd13;
                state <= INT1;
        end
        else if (repdone)
                state <= IFETCH;
        else begin
                if (!cyc_o) begin
                        cyc_type <= `CT_WRMEM;
                        lock_o <= w;
                        cyc_o <= 1'b1;
                        stb_o <= 1'b1;
                        we_o  <= 1'b1;
                        adr_o <= esdi;
                        dat_o <= (w & df) ? ah : al;
                end
                else if (ack_i) begin
                        cyc_type <= `CT_PASSIVE;
                        if (repz|repnz) begin
                                state <= w ? STOS1 : STOS;
                                cx <= cx_dec;
                        end
                        else
                                state <= w ? STOS1 : IFETCH;
                        lock_o <= w;
                        cyc_o <= w;
                        stb_o <= 1'b0;
                        we_o  <= 1'b0;
                        if (df)
                                di <= di_dec;
                        else
                                di <= di_inc;
                end
        end
STOS1:
        begin
                cyc_type <= `CT_WRMEM;
                cyc_o <= 1'b1;
                stb_o <= 1'b1;
                we_o  <= 1'b1;
                adr_o <= esdi;
                dat_o <= df ? al : ah;
                state <= STOS2;
        end
STOS2:
        if (ack_i) begin
                cyc_type <= `CT_PASSIVE;
                if (repz|repnz)
                        state <= STOS;
                else
                        state <= IFETCH;
                lock_o <= 1'b0;
                cyc_o <= 1'b0;
                stb_o <= 1'b0;
                we_o  <= 1'b0;
                if (df)
                        di <= di_dec;
                else
                        di <= di_inc;
        end

Line No.	Rev	Author	Line
1	2	robfinch	`//=============================================================================`
2			`// STOSB,STOSW`
3			`// Store string data to memory.`
4			`//`
5			`//`
6			`// 2009-2012 Robert Finch`
7			`// Stratford`
8			`// robfinch<remove>@opencores.org`
9			`//`
10			`//`
11			`// This source file is free software: you can redistribute it and/or modify`
12			`// it under the terms of the GNU Lesser General Public License as published`
13			`// by the Free Software Foundation, either version 3 of the License, or`
14			`// (at your option) any later version.`
15			`//`
16			`// This source file is distributed in the hope that it will be useful,`
17			`// but WITHOUT ANY WARRANTY; without even the implied warranty of`
18			`// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the`
19			`// GNU General Public License for more details.`
20			`//`
21			`// You should have received a copy of the GNU General Public License`
22			`// along with this program. If not, see <http://www.gnu.org/licenses/>.`
23			`//`
24			`//=============================================================================`
25			`//`
26			`STOS:`
27			`include "check_for_ints.v"
28			`else if (w && (di==16'hFFFF)) begin`
29			ir <= `NOP;
30			`int_num <= 8'd13;`
31			`state <= INT1;`
32			`end`
33			`else if (repdone)`
34			`state <= IFETCH;`
35			`else begin`
36			`if (!cyc_o) begin`
37			cyc_type <= `CT_WRMEM;
38			`lock_o <= w;`
39			`cyc_o <= 1'b1;`
40			`stb_o <= 1'b1;`
41			`we_o <= 1'b1;`
42			`adr_o <= esdi;`
43			`dat_o <= (w & df) ? ah : al;`
44			`end`
45			`else if (ack_i) begin`
46			cyc_type <= `CT_PASSIVE;
47			`if (repz\|repnz) begin`
48			`state <= w ? STOS1 : STOS;`
49			`cx <= cx_dec;`
50			`end`
51			`else`
52			`state <= w ? STOS1 : IFETCH;`
53			`lock_o <= w;`
54			`cyc_o <= w;`
55			`stb_o <= 1'b0;`
56			`we_o <= 1'b0;`
57			`if (df)`
58			`di <= di_dec;`
59			`else`
60			`di <= di_inc;`
61			`end`
62			`end`
63			`STOS1:`
64			`begin`
65			cyc_type <= `CT_WRMEM;
66			`cyc_o <= 1'b1;`
67			`stb_o <= 1'b1;`
68			`we_o <= 1'b1;`
69			`adr_o <= esdi;`
70			`dat_o <= df ? al : ah;`
71			`state <= STOS2;`
72			`end`
73			`STOS2:`
74			`if (ack_i) begin`
75			cyc_type <= `CT_PASSIVE;
76			`if (repz\|repnz)`
77			`state <= STOS;`
78			`else`
79			`state <= IFETCH;`
80			`lock_o <= 1'b0;`
81			`cyc_o <= 1'b0;`
82			`stb_o <= 1'b0;`
83			`we_o <= 1'b0;`
84			`if (df)`
85			`di <= di_dec;`
86			`else`
87			`di <= di_inc;`
88			`end`

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[/] [rtf8088/] [trunk/] [rtl/] [verilog/] [STOS.v] - Blame information for rev 2