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

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`define CMD_Shift       #AUTOGEN_NEXT_CMD
 
`define CMDEX_Shift_implicit        4'd0
`define CMDEX_Shift_modregrm        4'd1
`define CMDEX_Shift_modregrm_imm    4'd2

 

dec_ready_modregrm_one && { decoder[7:2], 2'b0 } == 8'hD0
`CMD_Shift
IF(decoder[1]); SET(dec_cmdex, `CMDEX_Shift_implicit); ELSE(); SET(dec_cmdex, `CMDEX_Shift_modregrm); ENDIF();
IF(decoder[0] == 1'b0); SET(dec_is_8bit); ENDIF();
SET(consume_modregrm_one);

 

dec_ready_modregrm_imm && { decoder[7:1], 1'b0 } == 8'hC0
`CMD_Shift
SET(dec_cmdex, `CMDEX_Shift_modregrm_imm);
IF(decoder[0] == 1'b0); SET(dec_is_8bit); ENDIF();
SET(consume_modregrm_imm);

 

IF(rd_cmd == `CMD_Shift && rd_cmdex != `CMDEX_Shift_implicit);
 
    SET(rd_src_is_modregrm_imm, rd_cmdex == `CMDEX_Shift_modregrm_imm);
    SET(rd_src_is_1,            rd_cmdex == `CMDEX_Shift_modregrm);
 
    SET(rd_req_eflags);
 
    // dst: reg, src: imm or 1
    IF(rd_modregrm_mod == 2'b11);
 
        SET(rd_dst_is_rm);
 
        SET(rd_req_rm);
 
        IF(rd_mutex_busy_modregrm_rm); SET(rd_waiting); ENDIF();
    ENDIF();
 
    // dst: memory, src: imm or 1
    IF(rd_modregrm_mod != 2'b11);
 
        SET(rd_dst_is_memory);
 
        SET(rd_req_memory);
 
        IF(rd_mutex_busy_memory); SET(rd_waiting);
        ELSE();
            SET(read_rmw_virtual);
 
            IF(~(read_for_rd_ready)); SET(rd_waiting); ENDIF();
        ENDIF();
    ENDIF();
ENDIF();

 

IF(rd_cmd == `CMD_Shift && rd_cmdex == `CMDEX_Shift_implicit);
 
    SET(rd_src_is_ecx);
 
    SET(rd_req_eflags);
 
    // dst: reg, src: CL
    IF(rd_modregrm_mod == 2'b11);
 
        SET(rd_dst_is_rm);
 
        SET(rd_req_rm);
 
        IF(rd_mutex_busy_modregrm_rm || rd_mutex_busy_ecx); SET(rd_waiting); ENDIF();
    ENDIF();
 
    // dst: memory, src: imm or 1
    IF(rd_modregrm_mod != 2'b11);
 
        SET(rd_dst_is_memory);
 
        SET(rd_req_memory);
 
        IF(rd_mutex_busy_memory || rd_mutex_busy_ecx); SET(rd_waiting);
        ELSE();
            SET(read_rmw_virtual);
 
            IF(~(read_for_rd_ready)); SET(rd_waiting); ENDIF();
        ENDIF();
    ENDIF();
ENDIF();

 

IF(exe_cmd == `CMD_Shift && exe_decoder[13:12] == 2'b01);
 
    SET(exe_result, e_shift_result);
    SET(exe_result_signals, { e_shift_no_write, e_shift_oszapc_update, e_shift_cf_of_update, e_shift_oflag, e_shift_cflag });
 
    IF(exe_mutex_current[`MUTEX_EFLAGS_BIT]); SET(exe_waiting); ENDIF();
ENDIF();

 

IF(exe_cmd == `CMD_Shift && exe_decoder[13:12] != 2'b01);
 
    SET(exe_result, e_shift_result);
    SET(exe_result_signals, { e_shift_no_write, e_shift_oszapc_update, e_shift_cf_of_update, e_shift_oflag, e_shift_cflag });
ENDIF();

 

IF(wr_cmd == `CMD_Shift);
 
    // result_signals
    // { e_shift_no_write, e_shift_oszapc_update, e_shift_cf_of_update, e_shift_oflag, e_shift_cflag }
 
    IF(~(result_signals[4])); //e_shift_no_write
        IF(wr_dst_is_memory && ~(write_for_wr_ready)); SET(wr_waiting); ENDIF();
 
        SET(write_regrm,         wr_dst_is_rm);
        SET(write_rmw_virtual,   wr_dst_is_memory);
    ENDIF();
 
    IF(result_signals[3]); //e_shift_oszapc_update
        SAVE(zflag, zflag_result);
        SAVE(sflag, sflag_result);
        SAVE(pflag, pflag_result);
        SAVE(aflag, aflag_arith);
    ENDIF();
 
    IF(result_signals[2]); //e_shift_cf_of_update
        SAVE(cflag, result_signals[0]);
        SAVE(oflag, result_signals[1]);
    ENDIF();
ENDIF();


Line No.	Rev	Author	Line
1	2	alfik
2
3			`define CMD_Shift #AUTOGEN_NEXT_CMD
4
5			`define CMDEX_Shift_implicit 4'd0
6			`define CMDEX_Shift_modregrm 4'd1
7			`define CMDEX_Shift_modregrm_imm 4'd2
8
9
10
11			`dec_ready_modregrm_one && { decoder[7:2], 2'b0 } == 8'hD0`
12			`CMD_Shift
13			IF(decoder[1]); SET(dec_cmdex, `CMDEX_Shift_implicit); ELSE(); SET(dec_cmdex, `CMDEX_Shift_modregrm); ENDIF();
14			`IF(decoder[0] == 1'b0); SET(dec_is_8bit); ENDIF();`
15			`SET(consume_modregrm_one);`
16
17
18
19			`dec_ready_modregrm_imm && { decoder[7:1], 1'b0 } == 8'hC0`
20			`CMD_Shift
21			SET(dec_cmdex, `CMDEX_Shift_modregrm_imm);
22			`IF(decoder[0] == 1'b0); SET(dec_is_8bit); ENDIF();`
23			`SET(consume_modregrm_imm);`
24
25
26
27			IF(rd_cmd == `CMD_Shift && rd_cmdex != `CMDEX_Shift_implicit);
28
29			SET(rd_src_is_modregrm_imm, rd_cmdex == `CMDEX_Shift_modregrm_imm);
30			SET(rd_src_is_1, rd_cmdex == `CMDEX_Shift_modregrm);
31
32			`SET(rd_req_eflags);`
33
34			`// dst: reg, src: imm or 1`
35			`IF(rd_modregrm_mod == 2'b11);`
36
37			`SET(rd_dst_is_rm);`
38
39			`SET(rd_req_rm);`
40
41			`IF(rd_mutex_busy_modregrm_rm); SET(rd_waiting); ENDIF();`
42			`ENDIF();`
43
44			`// dst: memory, src: imm or 1`
45			`IF(rd_modregrm_mod != 2'b11);`
46
47			`SET(rd_dst_is_memory);`
48
49			`SET(rd_req_memory);`
50
51			`IF(rd_mutex_busy_memory); SET(rd_waiting);`
52			`ELSE();`
53			`SET(read_rmw_virtual);`
54
55			`IF(~(read_for_rd_ready)); SET(rd_waiting); ENDIF();`
56			`ENDIF();`
57			`ENDIF();`
58			`ENDIF();`
59
60
61
62			IF(rd_cmd == `CMD_Shift && rd_cmdex == `CMDEX_Shift_implicit);
63
64			`SET(rd_src_is_ecx);`
65
66			`SET(rd_req_eflags);`
67
68			`// dst: reg, src: CL`
69			`IF(rd_modregrm_mod == 2'b11);`
70
71			`SET(rd_dst_is_rm);`
72
73			`SET(rd_req_rm);`
74
75			`IF(rd_mutex_busy_modregrm_rm \|\| rd_mutex_busy_ecx); SET(rd_waiting); ENDIF();`
76			`ENDIF();`
77
78			`// dst: memory, src: imm or 1`
79			`IF(rd_modregrm_mod != 2'b11);`
80
81			`SET(rd_dst_is_memory);`
82
83			`SET(rd_req_memory);`
84
85			`IF(rd_mutex_busy_memory \|\| rd_mutex_busy_ecx); SET(rd_waiting);`
86			`ELSE();`
87			`SET(read_rmw_virtual);`
88
89			`IF(~(read_for_rd_ready)); SET(rd_waiting); ENDIF();`
90			`ENDIF();`
91			`ENDIF();`
92			`ENDIF();`
93
94
95
96			IF(exe_cmd == `CMD_Shift && exe_decoder[13:12] == 2'b01);
97
98			`SET(exe_result, e_shift_result);`
99			`SET(exe_result_signals, { e_shift_no_write, e_shift_oszapc_update, e_shift_cf_of_update, e_shift_oflag, e_shift_cflag });`
100
101			IF(exe_mutex_current[`MUTEX_EFLAGS_BIT]); SET(exe_waiting); ENDIF();
102			`ENDIF();`
103
104
105
106			IF(exe_cmd == `CMD_Shift && exe_decoder[13:12] != 2'b01);
107
108			`SET(exe_result, e_shift_result);`
109			`SET(exe_result_signals, { e_shift_no_write, e_shift_oszapc_update, e_shift_cf_of_update, e_shift_oflag, e_shift_cflag });`
110			`ENDIF();`
111
112
113
114			IF(wr_cmd == `CMD_Shift);
115
116			`// result_signals`
117			`// { e_shift_no_write, e_shift_oszapc_update, e_shift_cf_of_update, e_shift_oflag, e_shift_cflag }`
118
119			`IF(~(result_signals[4])); //e_shift_no_write`
120			`IF(wr_dst_is_memory && ~(write_for_wr_ready)); SET(wr_waiting); ENDIF();`
121
122			`SET(write_regrm, wr_dst_is_rm);`
123			`SET(write_rmw_virtual, wr_dst_is_memory);`
124			`ENDIF();`
125
126			`IF(result_signals[3]); //e_shift_oszapc_update`
127			`SAVE(zflag, zflag_result);`
128			`SAVE(sflag, sflag_result);`
129			`SAVE(pflag, pflag_result);`
130			`SAVE(aflag, aflag_arith);`
131			`ENDIF();`
132
133			`IF(result_signals[2]); //e_shift_cf_of_update`
134			`SAVE(cflag, result_signals[0]);`
135			`SAVE(oflag, result_signals[1]);`
136			`ENDIF();`
137			`ENDIF();`
138

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