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[/] [core_arm/] [trunk/] [vhdl/] [sparc/] [libs/] [sparcdecode.vhd] - Blame information for rev 2

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Line No. Rev Author Line
1 2 tarookumic 
library ieee;
2 
use ieee.std_logic_1164.all;
3 
use work.config.all;
4 
 
5 
-- PREFIX: sde_xxx
6 
package spacedecode is
7 
 
8 
-------------------------------------------------------------------------------
9 
 
10 
type sde_decinsn is (
11 
 sde_insn_ldsb, sde_insn_ldsh, sde_insn_ldst_ub, sde_insn_ldst_uh,
12 
 sde_insn_ldst, sde_insn_ldst_d, sde_insn_ldst_f, sde_insn_ldst_df,
13 
 sde_insn_ldst_fsr, sde_insn_stdfq, sde_insn_ldst_c, sde_insn_ldst_dc,
14 
 sde_insn_ldst_csr, sde_insn_stdcq, sde_insn_ldstb, sde_insn_swp,
15 
 sde_insn_sethi, sde_insn_nop, sde_insn_and, sde_insn_or, sde_insn_xor,
16 
 sde_insn_sll, sde_insn_srl, sde_insn_sra, sde_insn_sadd, sde_insn_tsadd,
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 sde_insn_tsaddtv, sde_insn_mulscc, sde_insn_divscc, sde_insn_sv,
18 
 sde_insn_rest, sde_insn_bra, sde_insn_fbra, sde_insn_cbra, sde_insn_jmp,
19 
 sde_insn_jml, sde_insn_ret, sde_insn_trap,
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 sde_insn_rd, sde_insn_rdp, sde_insn_rdw, sde_insn_rdt, sde_insn_wd, sde_insn_wdp,
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 sde_insn_wdw, sde_insn_wdt, sde_insn_stbar, sde_insn_unimp
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);
23 
 
24 
function sde_decode_v8(
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  insn : in std_logic_vector(31 downto 0)
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) return sde_decinsn;
27 
 
28 
end spacedecode;
29 
 
30 
package body spacedecode is
31 
 
32 
function sde_decode_v8(
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  insn : in std_logic_vector(31 downto 0)
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) return sde_decinsn is
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begin
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case insn(31 downto 30) is
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when "00"=>
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 case insn(24 downto 24) is
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 when "0"=>
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  case insn(23 downto 23) is
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  when "0"=>
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   case insn(22 downto 22) is
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   when "0"=>
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    return sde_insn_unimp;
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   when others =>
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   end case;
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  when "1"=>
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   case insn(22 downto 22) is
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   when "0"=>
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    return sde_insn_bra;
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   when others =>
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   end case;
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  when others =>
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  end case;
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 when "1"=>
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  case insn(23 downto 23) is
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  when "1"=>
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   case insn(22 downto 22) is
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   when "1"=>
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    return sde_insn_cbra;
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   when "0"=>
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    return sde_insn_fbra;
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   when others =>
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   end case;
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  when "0"=>
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   case insn(22 downto 22) is
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   when "0"=>
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    case insn(29 downto 25) is
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    when "00000"=>
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     return sde_insn_nop;
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    when others =>
72 
    end case;
73 
    return sde_insn_sethi; --default
74 
   when others =>
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   end case;
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  when others =>
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  end case;
78 
 when others =>
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 end case;
80 
when "10"=>
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 case insn(24 downto 24) is
82 
 when "1"=>
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  case insn(23 downto 23) is
84 
  when "0"=>
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   case insn(22 downto 22) is
86 
   when "1"=>
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    case insn(21 downto 21) is
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    when "0"=>
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     case insn(20 downto 20) is
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     when "0"=>
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      case insn(19 downto 19) is
92 
      when "0"=>
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       case insn(29 downto 25) is
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       when "00000"=>
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        case insn(18 downto 13) is
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        when "011110"=>
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         return sde_insn_stbar;
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        when others =>
99 
        end case;
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       when others =>
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       end case;
102 
       return sde_insn_rd; --default
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      when "1"=>
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       return sde_insn_rdp;
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      when others =>
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      end case;
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     when "1"=>
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      case insn(19 downto 19) is
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      when "1"=>
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       return sde_insn_rdt;
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      when "0"=>
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       return sde_insn_rdw;
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      when others =>
114 
      end case;
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     when others =>
116 
     end case;
117 
    when others =>
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    end case;
119 
   when "0"=>
120 
    case insn(21 downto 21) is
121 
    when "0"=>
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     case insn(20 downto 20) is
123 
     when "1"=>
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      return sde_insn_tsaddtv;
125 
     when "0"=>
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      return sde_insn_tsadd;
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     when others =>
128 
     end case;
129 
    when "1"=>
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     case insn(20 downto 20) is
131 
     when "1"=>
132 
      case insn(19 downto 19) is
133 
      when "1"=>
134 
       return sde_insn_sra;
135 
      when "0"=>
136 
       return sde_insn_srl;
137 
      when others =>
138 
      end case;
139 
     when "0"=>
140 
      case insn(19 downto 19) is
141 
      when "1"=>
142 
       return sde_insn_sll;
143 
      when others =>
144 
      end case;
145 
     when others =>
146 
     end case;
147 
    when others =>
148 
    end case;
149 
   when others =>
150 
   end case;
151 
  when "1"=>
152 
   case insn(22 downto 22) is
153 
   when "0"=>
154 
    case insn(21 downto 21) is
155 
    when "0"=>
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     case insn(20 downto 20) is
157 
     when "1"=>
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      case insn(19 downto 19) is
159 
      when "1"=>
160 
       return sde_insn_wdt;
161 
      when "0"=>
162 
       return sde_insn_wdw;
163 
      when others =>
164 
      end case;
165 
     when "0"=>
166 
      case insn(19 downto 19) is
167 
      when "1"=>
168 
       return sde_insn_wdp;
169 
      when "0"=>
170 
       return sde_insn_wd;
171 
      when others =>
172 
      end case;
173 
     when others =>
174 
     end case;
175 
    when others =>
176 
    end case;
177 
   when "1"=>
178 
    case insn(21 downto 21) is
179 
    when "0"=>
180 
     case insn(20 downto 20) is
181 
     when "1"=>
182 
      case insn(19 downto 19) is
183 
      when "0"=>
184 
       return sde_insn_trap;
185 
      when others =>
186 
      end case;
187 
     when "0"=>
188 
      case insn(19 downto 19) is
189 
      when "1"=>
190 
       return sde_insn_ret;
191 
      when "0"=>
192 
       return sde_insn_jml;
193 
      when others =>
194 
      end case;
195 
     when others =>
196 
     end case;
197 
    when "1"=>
198 
     case insn(20 downto 20) is
199 
     when "0"=>
200 
      case insn(19 downto 19) is
201 
      when "1"=>
202 
       return sde_insn_rest;
203 
      when "0"=>
204 
       return sde_insn_sv;
205 
      when others =>
206 
      end case;
207 
     when others =>
208 
     end case;
209 
    when others =>
210 
    end case;
211 
   when others =>
212 
   end case;
213 
  when others =>
214 
  end case;
215 
 when "0"=>
216 
  case insn(20 downto 20) is
217 
  when "1"=>
218 
   case insn(22 downto 22) is
219 
   when "1"=>
220 
    case insn(21 downto 21) is
221 
    when "1"=>
222 
     return sde_insn_divscc;
223 
    when "0"=>
224 
     return sde_insn_mulscc;
225 
    when others =>
226 
    end case;
227 
   when "0"=>
228 
    case insn(19 downto 19) is
229 
    when "1"=>
230 
     return sde_insn_xor;
231 
    when "0"=>
232 
     return sde_insn_or;
233 
    when others =>
234 
    end case;
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   when others =>
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   end case;
237 
  when "0"=>
238 
   case insn(19 downto 19) is
239 
   when "0"=>
240 
    return sde_insn_sadd;
241 
   when "1"=>
242 
    case insn(22 downto 22) is
243 
    when "0"=>
244 
     return sde_insn_and;
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    when others =>
246 
    end case;
247 
   when others =>
248 
   end case;
249 
  when others =>
250 
  end case;
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 when others =>
252 
 end case;
253 
when "01"=>
254 
 return sde_insn_jmp;
255 
when "11"=>
256 
 case insn(24 downto 24) is
257 
 when "0"=>
258 
  case insn(22 downto 22) is
259 
  when "1"=>
260 
   case insn(21 downto 21) is
261 
   when "1"=>
262 
    case insn(20 downto 20) is
263 
    when "1"=>
264 
     case insn(19 downto 19) is
265 
     when "1"=>
266 
      return sde_insn_swp;
267 
     when others =>
268 
     end case;
269 
    when "0"=>
270 
     case insn(19 downto 19) is
271 
     when "1"=>
272 
      return sde_insn_ldstb;
273 
     when others =>
274 
     end case;
275 
    when others =>
276 
    end case;
277 
   when "0"=>
278 
    case insn(20 downto 20) is
279 
    when "1"=>
280 
     case insn(19 downto 19) is
281 
     when "0"=>
282 
      return sde_insn_ldsh;
283 
     when others =>
284 
     end case;
285 
    when "0"=>
286 
     case insn(19 downto 19) is
287 
     when "1"=>
288 
      return sde_insn_ldsb;
289 
     when others =>
290 
     end case;
291 
    when others =>
292 
    end case;
293 
   when others =>
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   end case;
295 
  when "0"=>
296 
   case insn(20 downto 20) is
297 
   when "1"=>
298 
    case insn(19 downto 19) is
299 
    when "1"=>
300 
     return sde_insn_ldst_d;
301 
    when "0"=>
302 
     return sde_insn_ldst_uh;
303 
    when others =>
304 
    end case;
305 
   when "0"=>
306 
    case insn(19 downto 19) is
307 
    when "0"=>
308 
     return sde_insn_ldst;
309 
    when "1"=>
310 
     return sde_insn_ldst_ub;
311 
    when others =>
312 
    end case;
313 
   when others =>
314 
   end case;
315 
  when others =>
316 
  end case;
317 
 when "1"=>
318 
  case insn(23 downto 23) is
319 
  when "1"=>
320 
   case insn(22 downto 22) is
321 
   when "0"=>
322 
    case insn(20 downto 20) is
323 
    when "1"=>
324 
     case insn(19 downto 19) is
325 
     when "1"=>
326 
      case insn(21 downto 21) is
327 
      when "1"=>
328 
       return sde_insn_stdcq;
329 
      when others =>
330 
      end case;
331 
      return sde_insn_ldst_dc; --default
332 
     when others =>
333 
     end case;
334 
    when "0"=>
335 
     case insn(19 downto 19) is
336 
     when "1"=>
337 
      return sde_insn_ldst_csr;
338 
     when "0"=>
339 
      return sde_insn_ldst_c;
340 
     when others =>
341 
     end case;
342 
    when others =>
343 
    end case;
344 
   when others =>
345 
   end case;
346 
  when "0"=>
347 
   case insn(22 downto 22) is
348 
   when "0"=>
349 
    case insn(20 downto 20) is
350 
    when "1"=>
351 
     case insn(19 downto 19) is
352 
     when "0"=>
353 
      case insn(21 downto 21) is
354 
      when "1"=>
355 
       return sde_insn_stdfq;
356 
      when others =>
357 
      end case;
358 
     when "1"=>
359 
      return sde_insn_ldst_df;
360 
     when others =>
361 
     end case;
362 
    when "0"=>
363 
     case insn(19 downto 19) is
364 
     when "1"=>
365 
      return sde_insn_ldst_fsr;
366 
     when "0"=>
367 
      return sde_insn_ldst_f;
368 
     when others =>
369 
     end case;
370 
    when others =>
371 
    end case;
372 
   when others =>
373 
   end case;
374 
  when others =>
375 
  end case;
376 
 when others =>
377 
 end case;
378 
when others =>
379 
end case;
380 
    return sde_insn_unimp;
381 
end;
382 
 
383 
 
384 
end spacedecode;

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