bit_scan.py (5414:bed5152f6368) bit_scan.py (5415:5c28e3dbdc8e)
1# Copyright (c) 2008 The Regents of The University of Michigan
2# All rights reserved.
3#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are
6# met: redistributions of source code must retain the above copyright
7# notice, this list of conditions and the following disclaimer;
8# redistributions in binary form must reproduce the above copyright

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245 # Zero out the result register
246 movi reg, reg, 0
247
248 subi t2, t1, 1
249 xor t1, t2, t1
250
251 # Bit 6
252 srli t3, t1, 32, dataSize=8
1# Copyright (c) 2008 The Regents of The University of Michigan
2# All rights reserved.
3#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are
6# met: redistributions of source code must retain the above copyright
7# notice, this list of conditions and the following disclaimer;
8# redistributions in binary form must reproduce the above copyright

--- 236 unchanged lines hidden (view full) ---

245 # Zero out the result register
246 movi reg, reg, 0
247
248 subi t2, t1, 1
249 xor t1, t2, t1
250
251 # Bit 6
252 srli t3, t1, 32, dataSize=8
253 andi t3, t3, 32
254 or reg, reg, t3
253 andi t4, t3, 32, flags=(EZF,)
254 or reg, reg, t4
255 mov t1, t1, t3, flags=(nCEZF,)
255
256 # Bit 5
257 srli t3, t1, 16, dataSize=8
256
257 # Bit 5
258 srli t3, t1, 16, dataSize=8
258 andi t3, t3, 16
259 or reg, reg, t3
259 andi t4, t3, 16, flags=(EZF,)
260 or reg, reg, t4
261 mov t1, t1, t3, flags=(nCEZF,)
260
261 # Bit 4
262 srli t3, t1, 8, dataSize=8
262
263 # Bit 4
264 srli t3, t1, 8, dataSize=8
263 andi t3, t3, 8
264 or reg, reg, t3
265 andi t4, t3, 8, flags=(EZF,)
266 or reg, reg, t4
267 mov t1, t1, t3, flags=(nCEZF,)
265
266 # Bit 3
267 srli t3, t1, 4, dataSize=8
268
269 # Bit 3
270 srli t3, t1, 4, dataSize=8
268 andi t3, t3, 4
269 or reg, reg, t3
271 andi t4, t3, 4, flags=(EZF,)
272 or reg, reg, t4
273 mov t1, t1, t3, flags=(nCEZF,)
270
271 # Bit 2
272 srli t3, t1, 2, dataSize=8
274
275 # Bit 2
276 srli t3, t1, 2, dataSize=8
273 andi t3, t3, 2
274 or reg, reg, t3
277 andi t4, t3, 2, flags=(EZF,)
278 or reg, reg, t4
279 mov t1, t1, t3, flags=(nCEZF,)
275
276 # Bit 1
277 srli t3, t1, 1, dataSize=8
280
281 # Bit 1
282 srli t3, t1, 1, dataSize=8
278 andi t3, t3, 1
279 or reg, reg, t3
283 andi t4, t3, 1, flags=(EZF,)
284 or reg, reg, t4
285 mov t1, t1, t3, flags=(nCEZF,)
280
281end:
282 fault "NoFault"
283};
284
285def macroop BSF_R_M {
286
287 mov t1, t1, t0, dataSize=8

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294 # Zero out the result register
295 mov reg, reg, t0
296
297 subi t2, t1, 1
298 xor t1, t2, t1
299
300 # Bit 6
301 srli t3, t1, 32, dataSize=8
286
287end:
288 fault "NoFault"
289};
290
291def macroop BSF_R_M {
292
293 mov t1, t1, t0, dataSize=8

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300 # Zero out the result register
301 mov reg, reg, t0
302
303 subi t2, t1, 1
304 xor t1, t2, t1
305
306 # Bit 6
307 srli t3, t1, 32, dataSize=8
302 andi t3, t3, 32
303 or reg, reg, t3
308 andi t4, t3, 32, flags=(EZF,)
309 or reg, reg, t4
310 mov t1, t1, t3, flags=(nCEZF,)
304
305 # Bit 5
306 srli t3, t1, 16, dataSize=8
311
312 # Bit 5
313 srli t3, t1, 16, dataSize=8
307 andi t3, t3, 16
308 or reg, reg, t3
314 andi t4, t3, 16, flags=(EZF,)
315 or reg, reg, t4
316 mov t1, t1, t3, flags=(nCEZF,)
309
310 # Bit 4
311 srli t3, t1, 8, dataSize=8
317
318 # Bit 4
319 srli t3, t1, 8, dataSize=8
312 andi t3, t3, 8
313 or reg, reg, t3
320 andi t4, t3, 8, flags=(EZF,)
321 or reg, reg, t4
322 mov t1, t1, t3, flags=(nCEZF,)
314
315 # Bit 3
316 srli t3, t1, 4, dataSize=8
323
324 # Bit 3
325 srli t3, t1, 4, dataSize=8
317 andi t3, t3, 4
318 or reg, reg, t3
326 andi t4, t3, 4, flags=(EZF,)
327 or reg, reg, t4
328 mov t1, t1, t3, flags=(nCEZF,)
319
320 # Bit 2
321 srli t3, t1, 2, dataSize=8
329
330 # Bit 2
331 srli t3, t1, 2, dataSize=8
322 andi t3, t3, 2
323 or reg, reg, t3
332 andi t4, t3, 2, flags=(EZF,)
333 or reg, reg, t4
334 mov t1, t1, t3, flags=(nCEZF,)
324
325 # Bit 1
326 srli t3, t1, 1, dataSize=8
335
336 # Bit 1
337 srli t3, t1, 1, dataSize=8
327 andi t3, t3, 1
328 or reg, reg, t3
338 andi t4, t3, 1, flags=(EZF,)
339 or reg, reg, t4
340 mov t1, t1, t3, flags=(nCEZF,)
329
330end:
331 fault "NoFault"
332};
333
334def macroop BSF_R_P {
335
336 rdip t7

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344 # Zero out the result register
345 mov reg, reg, t0
346
347 subi t2, t1, 1
348 xor t1, t2, t1
349
350 # Bit 6
351 srli t3, t1, 32, dataSize=8
341
342end:
343 fault "NoFault"
344};
345
346def macroop BSF_R_P {
347
348 rdip t7

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356 # Zero out the result register
357 mov reg, reg, t0
358
359 subi t2, t1, 1
360 xor t1, t2, t1
361
362 # Bit 6
363 srli t3, t1, 32, dataSize=8
352 andi t3, t3, 32
353 or reg, reg, t3
364 andi t4, t3, 32, flags=(EZF,)
365 or reg, reg, t4
366 mov t1, t1, t3, flags=(nCEZF,)
354
355 # Bit 5
356 srli t3, t1, 16, dataSize=8
367
368 # Bit 5
369 srli t3, t1, 16, dataSize=8
357 andi t3, t3, 16
358 or reg, reg, t3
370 andi t4, t3, 16, flags=(EZF,)
371 or reg, reg, t4
372 mov t1, t1, t3, flags=(nCEZF,)
359
360 # Bit 4
361 srli t3, t1, 8, dataSize=8
373
374 # Bit 4
375 srli t3, t1, 8, dataSize=8
362 andi t3, t3, 8
363 or reg, reg, t3
376 andi t4, t3, 8, flags=(EZF,)
377 or reg, reg, t4
378 mov t1, t1, t3, flags=(nCEZF,)
364
365 # Bit 3
366 srli t3, t1, 4, dataSize=8
379
380 # Bit 3
381 srli t3, t1, 4, dataSize=8
367 andi t3, t3, 4
368 or reg, reg, t3
382 andi t4, t3, 4, flags=(EZF,)
383 or reg, reg, t4
384 mov t1, t1, t3, flags=(nCEZF,)
369
370 # Bit 2
371 srli t3, t1, 2, dataSize=8
385
386 # Bit 2
387 srli t3, t1, 2, dataSize=8
372 andi t3, t3, 2
373 or reg, reg, t3
388 andi t4, t3, 2, flags=(EZF,)
389 or reg, reg, t4
390 mov t1, t1, t3, flags=(nCEZF,)
374
375 # Bit 1
376 srli t3, t1, 1, dataSize=8
391
392 # Bit 1
393 srli t3, t1, 1, dataSize=8
377 andi t3, t3, 1
378 or reg, reg, t3
394 andi t4, t3, 1, flags=(EZF,)
395 or reg, reg, t4
396 mov t1, t1, t3, flags=(nCEZF,)
379
380end:
381 fault "NoFault"
382};
383'''
397
398end:
399 fault "NoFault"
400};
401'''