URL https://opencores.org/ocsvn/ao486/ao486/trunk

Subversion Repositories ao486

[/] [ao486/] [trunk/] [rtl/] [ao486/] [commands/] [CMD_POP.txt] - Blame information for rev 2

Details | Compare with Previous | View Log


 

`define CMD_POP         #AUTOGEN_NEXT_CMD
 
`define CMDEX_POP_implicit          4'd0
`define CMDEX_POP_modregrm_STEP_0   4'd1
`define CMDEX_POP_modregrm_STEP_1   4'd2

 

dec_ready_one && { decoder[7:3], 3'b0 } == 8'h58
`CMD_POP
SET(dec_cmdex, `CMDEX_POP_implicit);
SET(consume_one);

 

dec_ready_modregrm_one && decoder[7:0] == 8'h8F && decoder[13:11] == 3'd0
`CMD_POP
SET(dec_cmdex, `CMDEX_POP_modregrm_STEP_0);
SET(consume_modregrm_one);
SET(dec_is_complex);

 

`CMDEX_POP_modregrm_STEP_0
LAST(`CMDEX_POP_modregrm_STEP_1);

 

IF(rd_cmd == `CMD_POP && rd_cmdex == `CMDEX_POP_implicit);
 
    SET(address_stack_pop);
 
    SET(rd_src_is_memory);
    SET(rd_dst_is_implicit_reg);
 
    SET(rd_req_esp);
    SET(rd_req_implicit_reg);
 
    IF(rd_mutex_busy_memory || rd_mutex_busy_esp); SET(rd_waiting);
    ELSE();
        SET(read_virtual);
 
        IF(~(read_for_rd_ready)); SET(rd_waiting); ENDIF();
    ENDIF();
ENDIF();

 

IF(rd_cmd == `CMD_POP && rd_cmdex == `CMDEX_POP_modregrm_STEP_0);
 
    SET(address_stack_pop);
 
    SET(rd_src_is_memory);
 
    SET(rd_req_esp);
 
    IF(rd_mutex_busy_memory || rd_mutex_busy_esp); SET(rd_waiting);
    ELSE();
        SET(read_virtual);
 
        IF(~(read_for_rd_ready)); SET(rd_waiting); ENDIF();
    ENDIF();
ENDIF();

 

IF(rd_cmd == `CMD_POP && rd_cmdex == `CMDEX_POP_modregrm_STEP_1);
 
    // dst: reg
    IF(rd_modregrm_mod == 2'b11);
        // no need to wait
        SET(rd_dst_is_rm);
 
        SET(rd_req_rm);
    ENDIF();
 
    // dst: memory
    IF(rd_modregrm_mod != 2'b11);
        SET(rd_dst_is_memory);
 
        SET(rd_req_memory);
 
        SET(write_virtual_check);
 
        IF(~(write_virtual_check_ready)); SET(rd_waiting); ENDIF();
    ENDIF();
ENDIF();

 

IF(exe_cmd == `CMD_POP && exe_cmdex == `CMDEX_POP_implicit);
 
    SET(offset_pop);
 
    SET(exe_result, src);
 
ENDIF();

 

IF(exe_cmd == `CMD_POP && exe_cmdex == `CMDEX_POP_modregrm_STEP_0);
 
    SET(offset_pop);
 
    SAVE(exe_buffer, src);
ENDIF();

 

IF(exe_cmd == `CMD_POP && exe_cmdex == `CMDEX_POP_modregrm_STEP_1);
 
    SET(offset_pop);
 
    SET(exe_result, exe_buffer);
ENDIF();

 

IF(wr_cmd == `CMD_POP && wr_cmdex == `CMDEX_POP_implicit);
    SET(write_regrm);
 
    SAVE(esp, wr_stack_esp);
ENDIF();

 

IF(wr_cmd == `CMD_POP && wr_cmdex == `CMDEX_POP_modregrm_STEP_0);
    SET(wr_not_finished);
 
    SAVE(esp, wr_stack_esp);
 
    SET(wr_make_esp_speculative);
ENDIF();

 

IF(wr_cmd == `CMD_POP && wr_cmdex == `CMDEX_POP_modregrm_STEP_1);
    IF(wr_dst_is_memory && ~(write_for_wr_ready)); SET(wr_waiting); ENDIF();
 
    SET(write_regrm,     wr_dst_is_rm);
    SET(write_virtual,   wr_dst_is_memory);
 
    IF(~(wr_dst_is_memory) || write_for_wr_ready);
        SET(wr_make_esp_commit);
    ENDIF();
ENDIF();


Line No.	Rev	Author	Line
1	2	alfik
2
3			`define CMD_POP #AUTOGEN_NEXT_CMD
4
5			`define CMDEX_POP_implicit 4'd0
6			`define CMDEX_POP_modregrm_STEP_0 4'd1
7			`define CMDEX_POP_modregrm_STEP_1 4'd2
8
9
10
11			`dec_ready_one && { decoder[7:3], 3'b0 } == 8'h58`
12			`CMD_POP
13			SET(dec_cmdex, `CMDEX_POP_implicit);
14			`SET(consume_one);`
15
16
17
18			`dec_ready_modregrm_one && decoder[7:0] == 8'h8F && decoder[13:11] == 3'd0`
19			`CMD_POP
20			SET(dec_cmdex, `CMDEX_POP_modregrm_STEP_0);
21			`SET(consume_modregrm_one);`
22			`SET(dec_is_complex);`
23
24
25
26			`CMDEX_POP_modregrm_STEP_0
27			LAST(`CMDEX_POP_modregrm_STEP_1);
28
29
30
31			IF(rd_cmd == `CMD_POP && rd_cmdex == `CMDEX_POP_implicit);
32
33			`SET(address_stack_pop);`
34
35			`SET(rd_src_is_memory);`
36			`SET(rd_dst_is_implicit_reg);`
37
38			`SET(rd_req_esp);`
39			`SET(rd_req_implicit_reg);`
40
41			`IF(rd_mutex_busy_memory \|\| rd_mutex_busy_esp); SET(rd_waiting);`
42			`ELSE();`
43			`SET(read_virtual);`
44
45			`IF(~(read_for_rd_ready)); SET(rd_waiting); ENDIF();`
46			`ENDIF();`
47			`ENDIF();`
48
49
50
51			IF(rd_cmd == `CMD_POP && rd_cmdex == `CMDEX_POP_modregrm_STEP_0);
52
53			`SET(address_stack_pop);`
54
55			`SET(rd_src_is_memory);`
56
57			`SET(rd_req_esp);`
58
59			`IF(rd_mutex_busy_memory \|\| rd_mutex_busy_esp); SET(rd_waiting);`
60			`ELSE();`
61			`SET(read_virtual);`
62
63			`IF(~(read_for_rd_ready)); SET(rd_waiting); ENDIF();`
64			`ENDIF();`
65			`ENDIF();`
66
67
68
69			IF(rd_cmd == `CMD_POP && rd_cmdex == `CMDEX_POP_modregrm_STEP_1);
70
71			`// dst: reg`
72			`IF(rd_modregrm_mod == 2'b11);`
73			`// no need to wait`
74			`SET(rd_dst_is_rm);`
75
76			`SET(rd_req_rm);`
77			`ENDIF();`
78
79			`// dst: memory`
80			`IF(rd_modregrm_mod != 2'b11);`
81			`SET(rd_dst_is_memory);`
82
83			`SET(rd_req_memory);`
84
85			`SET(write_virtual_check);`
86
87			`IF(~(write_virtual_check_ready)); SET(rd_waiting); ENDIF();`
88			`ENDIF();`
89			`ENDIF();`
90
91
92
93			IF(exe_cmd == `CMD_POP && exe_cmdex == `CMDEX_POP_implicit);
94
95			`SET(offset_pop);`
96
97			`SET(exe_result, src);`
98
99			`ENDIF();`
100
101
102
103			IF(exe_cmd == `CMD_POP && exe_cmdex == `CMDEX_POP_modregrm_STEP_0);
104
105			`SET(offset_pop);`
106
107			`SAVE(exe_buffer, src);`
108			`ENDIF();`
109
110
111
112			IF(exe_cmd == `CMD_POP && exe_cmdex == `CMDEX_POP_modregrm_STEP_1);
113
114			`SET(offset_pop);`
115
116			`SET(exe_result, exe_buffer);`
117			`ENDIF();`
118
119
120
121			IF(wr_cmd == `CMD_POP && wr_cmdex == `CMDEX_POP_implicit);
122			`SET(write_regrm);`
123
124			`SAVE(esp, wr_stack_esp);`
125			`ENDIF();`
126
127
128
129			IF(wr_cmd == `CMD_POP && wr_cmdex == `CMDEX_POP_modregrm_STEP_0);
130			`SET(wr_not_finished);`
131
132			`SAVE(esp, wr_stack_esp);`
133
134			`SET(wr_make_esp_speculative);`
135			`ENDIF();`
136
137
138
139			IF(wr_cmd == `CMD_POP && wr_cmdex == `CMDEX_POP_modregrm_STEP_1);
140			`IF(wr_dst_is_memory && ~(write_for_wr_ready)); SET(wr_waiting); ENDIF();`
141
142			`SET(write_regrm, wr_dst_is_rm);`
143			`SET(write_virtual, wr_dst_is_memory);`
144
145			`IF(~(wr_dst_is_memory) \|\| write_for_wr_ready);`
146			`SET(wr_make_esp_commit);`
147			`ENDIF();`
148			`ENDIF();`
149

Browse

Tools

Subversion Repositories ao486

[/] [ao486/] [trunk/] [rtl/] [ao486/] [commands/] [CMD_POP.txt] - Blame information for rev 2