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

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`define CMD_AAA     #AUTOGEN_NEXT_CMD
`define CMD_AAS     #AUTOGEN_NEXT_CMD
`define CMD_DAA     #AUTOGEN_NEXT_CMD
`define CMD_DAS     #AUTOGEN_NEXT_CMD

 

dec_ready_one && decoder[7:0] == 8'h37
`CMD_AAA
SET(dec_is_8bit);
SET(consume_one);

 

dec_ready_one && decoder[7:0] == 8'h3F
`CMD_AAS
SET(dec_is_8bit);
SET(consume_one);

 

dec_ready_one && decoder[7:0] == 8'h27
`CMD_DAA
SET(dec_is_8bit);
SET(consume_one);

 

dec_ready_one && decoder[7:0] == 8'h2F
`CMD_DAS
SET(dec_is_8bit);
SET(consume_one);

 

IF(rd_cmd == `CMD_AAA || rd_cmd == `CMD_AAS || rd_cmd == `CMD_DAA || rd_cmd == `CMD_DAS);
 
    SET(rd_dst_is_eax);
 
    SET(rd_req_eflags);
    SET(rd_req_eax);
 
    IF(rd_mutex_busy_eax); SET(rd_waiting); ENDIF();
ENDIF();

 

wire e_bcd_condition_cf;
 
wire exe_bcd_condition_af;
wire exe_bcd_condition_cf;
 
wire [15:0] e_aaa_sum_ax;
wire [15:0] e_aaa_result;
 
wire [15:0] e_aas_sub_ax;
wire [15:0] e_aas_result;
 
wire [7:0]  e_daa_sum_low;
wire [7:0]  e_daa_step1;
wire [7:0]  e_daa_sum_high;
wire [7:0]  e_daa_result;
 
wire [7:0]  e_das_sub_low;
wire [7:0]  e_das_step1;
wire [7:0]  e_das_sub_high;
wire [7:0]  e_das_result;
 
//---------
 
assign e_bcd_condition_cf = (dst[7:0] > 8'h99 || cflag);
 
assign exe_bcd_condition_af = dst[3:0] > 4'd9 || aflag;
assign exe_bcd_condition_cf = e_bcd_condition_cf || (exe_bcd_condition_af && (cflag || (exe_cmd == `CMD_DAA)? dst[7:0] > 8'hF9 : dst[7:0] < 8'h06));
 
// AAA
assign e_aaa_sum_ax = dst[15:0] + 16'h0106;
assign e_aaa_result = (exe_bcd_condition_af)? { e_aaa_sum_ax[15:8], 4'b0, e_aaa_sum_ax[3:0] } : { dst[15:8], 4'd0, dst[3:0] };
 
// AAS
assign e_aas_sub_ax = dst[15:0] - 16'h0106;
assign e_aas_result = (exe_bcd_condition_af)? { e_aas_sub_ax[15:8], 4'b0, e_aas_sub_ax[3:0] } : { dst[15:8], 4'b0, dst[3:0] };
 
// DAA
assign e_daa_sum_low  = dst[7:0] + 8'h06;
assign e_daa_step1    = (exe_bcd_condition_af)? e_daa_sum_low : dst[7:0];
assign e_daa_sum_high = e_daa_step1 + 8'h60;
assign e_daa_result   = (e_bcd_condition_cf)? e_daa_sum_high : e_daa_step1;
 
// DAS
assign e_das_sub_low  = dst[7:0] - 8'h06;
assign e_das_step1    = (exe_bcd_condition_af)? e_das_sub_low : dst[7:0];
assign e_das_sub_high = e_das_step1 - 8'h60;
assign e_das_result   = (e_bcd_condition_cf)? e_das_sub_high : e_das_step1;

 

IF(exe_cmd == `CMD_AAA || exe_cmd == `CMD_AAS || exe_cmd == `CMD_DAA || exe_cmd == `CMD_DAS);
 
    SET(exe_result, (exe_cmd == `CMD_AAA)?  { 16'd0, e_aaa_result } :
                    (exe_cmd == `CMD_AAS)?  { 16'd0, e_aas_result } :
                    (exe_cmd == `CMD_DAA)?  { 16'd0, dst[15:8], e_daa_result } :
                                            { 16'd0, dst[15:8], e_das_result });
 
    SET(exe_result_signals, { 3'b0, exe_bcd_condition_af, exe_bcd_condition_cf });
 
    IF(exe_mutex_current[`MUTEX_EFLAGS_BIT]); SET(exe_waiting); ENDIF();
ENDIF();

 

IF(wr_cmd == `CMD_AAA || wr_cmd == `CMD_AAS);
    SAVE(eax, { eax[31:16], result[15:0] });
 
    SAVE(zflag, zflag_result);
    SAVE(sflag, sflag_result);
    SAVE(pflag, pflag_result);
 
    SAVE(aflag, result_signals[1]);
    SAVE(cflag, result_signals[1]);
    SAVE(oflag, oflag_arith);
ENDIF();

 

IF(wr_cmd == `CMD_DAA || wr_cmd == `CMD_DAS);
    SAVE(eax, { eax[31:16], result[15:0] });
 
    SAVE(zflag, zflag_result);
    SAVE(sflag, sflag_result);
    SAVE(pflag, pflag_result);
 
    SAVE(aflag, result_signals[1]);
    SAVE(cflag, result_signals[0]);
    SAVE(oflag, oflag_arith);
ENDIF();

 

Line No.	Rev	Author	Line
1	2	alfik
2
3			`define CMD_AAA #AUTOGEN_NEXT_CMD
4			`define CMD_AAS #AUTOGEN_NEXT_CMD
5			`define CMD_DAA #AUTOGEN_NEXT_CMD
6			`define CMD_DAS #AUTOGEN_NEXT_CMD
7
8
9
10			`dec_ready_one && decoder[7:0] == 8'h37`
11			`CMD_AAA
12			`SET(dec_is_8bit);`
13			`SET(consume_one);`
14
15
16
17			`dec_ready_one && decoder[7:0] == 8'h3F`
18			`CMD_AAS
19			`SET(dec_is_8bit);`
20			`SET(consume_one);`
21
22
23
24			`dec_ready_one && decoder[7:0] == 8'h27`
25			`CMD_DAA
26			`SET(dec_is_8bit);`
27			`SET(consume_one);`
28
29
30
31			`dec_ready_one && decoder[7:0] == 8'h2F`
32			`CMD_DAS
33			`SET(dec_is_8bit);`
34			`SET(consume_one);`
35
36
37
38			IF(rd_cmd == `CMD_AAA \|\| rd_cmd == `CMD_AAS \|\| rd_cmd == `CMD_DAA \|\| rd_cmd == `CMD_DAS);
39
40			`SET(rd_dst_is_eax);`
41
42			`SET(rd_req_eflags);`
43			`SET(rd_req_eax);`
44
45			`IF(rd_mutex_busy_eax); SET(rd_waiting); ENDIF();`
46			`ENDIF();`
47
48
49
50			`wire e_bcd_condition_cf;`
51
52			`wire exe_bcd_condition_af;`
53			`wire exe_bcd_condition_cf;`
54
55			`wire [15:0] e_aaa_sum_ax;`
56			`wire [15:0] e_aaa_result;`
57
58			`wire [15:0] e_aas_sub_ax;`
59			`wire [15:0] e_aas_result;`
60
61			`wire [7:0] e_daa_sum_low;`
62			`wire [7:0] e_daa_step1;`
63			`wire [7:0] e_daa_sum_high;`
64			`wire [7:0] e_daa_result;`
65
66			`wire [7:0] e_das_sub_low;`
67			`wire [7:0] e_das_step1;`
68			`wire [7:0] e_das_sub_high;`
69			`wire [7:0] e_das_result;`
70
71			`//---------`
72
73			`assign e_bcd_condition_cf = (dst[7:0] > 8'h99 \|\| cflag);`
74
75			`assign exe_bcd_condition_af = dst[3:0] > 4'd9 \|\| aflag;`
76			assign exe_bcd_condition_cf = e_bcd_condition_cf \|\| (exe_bcd_condition_af && (cflag \|\| (exe_cmd == `CMD_DAA)? dst[7:0] > 8'hF9 : dst[7:0] < 8'h06));
77
78			`// AAA`
79			`assign e_aaa_sum_ax = dst[15:0] + 16'h0106;`
80			`assign e_aaa_result = (exe_bcd_condition_af)? { e_aaa_sum_ax[15:8], 4'b0, e_aaa_sum_ax[3:0] } : { dst[15:8], 4'd0, dst[3:0] };`
81
82			`// AAS`
83			`assign e_aas_sub_ax = dst[15:0] - 16'h0106;`
84			`assign e_aas_result = (exe_bcd_condition_af)? { e_aas_sub_ax[15:8], 4'b0, e_aas_sub_ax[3:0] } : { dst[15:8], 4'b0, dst[3:0] };`
85
86			`// DAA`
87			`assign e_daa_sum_low = dst[7:0] + 8'h06;`
88			`assign e_daa_step1 = (exe_bcd_condition_af)? e_daa_sum_low : dst[7:0];`
89			`assign e_daa_sum_high = e_daa_step1 + 8'h60;`
90			`assign e_daa_result = (e_bcd_condition_cf)? e_daa_sum_high : e_daa_step1;`
91
92			`// DAS`
93			`assign e_das_sub_low = dst[7:0] - 8'h06;`
94			`assign e_das_step1 = (exe_bcd_condition_af)? e_das_sub_low : dst[7:0];`
95			`assign e_das_sub_high = e_das_step1 - 8'h60;`
96			`assign e_das_result = (e_bcd_condition_cf)? e_das_sub_high : e_das_step1;`
97
98
99
100			IF(exe_cmd == `CMD_AAA \|\| exe_cmd == `CMD_AAS \|\| exe_cmd == `CMD_DAA \|\| exe_cmd == `CMD_DAS);
101
102			SET(exe_result, (exe_cmd == `CMD_AAA)? { 16'd0, e_aaa_result } :
103			(exe_cmd == `CMD_AAS)? { 16'd0, e_aas_result } :
104			(exe_cmd == `CMD_DAA)? { 16'd0, dst[15:8], e_daa_result } :
105			`{ 16'd0, dst[15:8], e_das_result });`
106
107			`SET(exe_result_signals, { 3'b0, exe_bcd_condition_af, exe_bcd_condition_cf });`
108
109			IF(exe_mutex_current[`MUTEX_EFLAGS_BIT]); SET(exe_waiting); ENDIF();
110			`ENDIF();`
111
112
113
114			IF(wr_cmd == `CMD_AAA \|\| wr_cmd == `CMD_AAS);
115			`SAVE(eax, { eax[31:16], result[15:0] });`
116
117			`SAVE(zflag, zflag_result);`
118			`SAVE(sflag, sflag_result);`
119			`SAVE(pflag, pflag_result);`
120
121			`SAVE(aflag, result_signals[1]);`
122			`SAVE(cflag, result_signals[1]);`
123			`SAVE(oflag, oflag_arith);`
124			`ENDIF();`
125
126
127
128			IF(wr_cmd == `CMD_DAA \|\| wr_cmd == `CMD_DAS);
129			`SAVE(eax, { eax[31:16], result[15:0] });`
130
131			`SAVE(zflag, zflag_result);`
132			`SAVE(sflag, sflag_result);`
133			`SAVE(pflag, pflag_result);`
134
135			`SAVE(aflag, result_signals[1]);`
136			`SAVE(cflag, result_signals[0]);`
137			`SAVE(oflag, oflag_arith);`
138			`ENDIF();`
139
140

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