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Linux/arch/sparc/lib/memcpy.S

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Diff markup

Differences between /arch/sparc/lib/memcpy.S (Architecture sparc) and /arch/m68k/lib/memcpy.S (Architecture m68k)


  1 /* SPDX-License-Identifier: GPL-2.0 */            
  2 /* memcpy.S: Sparc optimized memcpy and memmov    
  3  * Hand optimized from GNU libc's memcpy and m    
  4  * Copyright (C) 1991,1996 Free Software Found    
  5  * Copyright (C) 1995 Linus Torvalds (Linus.To    
  6  * Copyright (C) 1996 David S. Miller (davem@c    
  7  * Copyright (C) 1996 Eddie C. Dost (ecd@skyne    
  8  * Copyright (C) 1996 Jakub Jelinek (jj@sunsit    
  9  */                                               
 10                                                   
 11 #include <linux/export.h>                         
 12                                                   
 13 #define FUNC(x)                 \                 
 14         .globl  x;              \                 
 15         .type   x,@function;    \                 
 16         .align  4;              \                 
 17 x:                                                
 18                                                   
 19 /* Both these macros have to start with exactl    
 20 #define MOVE_BIGCHUNK(src, dst, offset, t0, t1    
 21         ldd     [%src + (offset) + 0x00], %t0;    
 22         ldd     [%src + (offset) + 0x08], %t2;    
 23         ldd     [%src + (offset) + 0x10], %t4;    
 24         ldd     [%src + (offset) + 0x18], %t6;    
 25         st      %t0, [%dst + (offset) + 0x00];    
 26         st      %t1, [%dst + (offset) + 0x04];    
 27         st      %t2, [%dst + (offset) + 0x08];    
 28         st      %t3, [%dst + (offset) + 0x0c];    
 29         st      %t4, [%dst + (offset) + 0x10];    
 30         st      %t5, [%dst + (offset) + 0x14];    
 31         st      %t6, [%dst + (offset) + 0x18];    
 32         st      %t7, [%dst + (offset) + 0x1c];    
 33                                                   
 34 #define MOVE_BIGALIGNCHUNK(src, dst, offset, t    
 35         ldd     [%src + (offset) + 0x00], %t0;    
 36         ldd     [%src + (offset) + 0x08], %t2;    
 37         ldd     [%src + (offset) + 0x10], %t4;    
 38         ldd     [%src + (offset) + 0x18], %t6;    
 39         std     %t0, [%dst + (offset) + 0x00];    
 40         std     %t2, [%dst + (offset) + 0x08];    
 41         std     %t4, [%dst + (offset) + 0x10];    
 42         std     %t6, [%dst + (offset) + 0x18];    
 43                                                   
 44 #define MOVE_LASTCHUNK(src, dst, offset, t0, t    
 45         ldd     [%src - (offset) - 0x10], %t0;    
 46         ldd     [%src - (offset) - 0x08], %t2;    
 47         st      %t0, [%dst - (offset) - 0x10];    
 48         st      %t1, [%dst - (offset) - 0x0c];    
 49         st      %t2, [%dst - (offset) - 0x08];    
 50         st      %t3, [%dst - (offset) - 0x04];    
 51                                                   
 52 #define MOVE_LASTALIGNCHUNK(src, dst, offset,     
 53         ldd     [%src - (offset) - 0x10], %t0;    
 54         ldd     [%src - (offset) - 0x08], %t2;    
 55         std     %t0, [%dst - (offset) - 0x10];    
 56         std     %t2, [%dst - (offset) - 0x08];    
 57                                                   
 58 #define MOVE_SHORTCHUNK(src, dst, offset, t0,     
 59         ldub    [%src - (offset) - 0x02], %t0;    
 60         ldub    [%src - (offset) - 0x01], %t1;    
 61         stb     %t0, [%dst - (offset) - 0x02];    
 62         stb     %t1, [%dst - (offset) - 0x01];    
 63                                                   
 64         .text                                     
 65         .align  4                                 
 66                                                   
 67 FUNC(memmove)                                     
 68 EXPORT_SYMBOL(memmove)                            
 69         cmp             %o0, %o1                  
 70         mov             %o0, %g7                  
 71         bleu            9f                        
 72          sub            %o0, %o1, %o4             
 73                                                   
 74         add             %o1, %o2, %o3             
 75         cmp             %o3, %o0                  
 76         bleu            0f                        
 77          andcc          %o4, 3, %o5               
 78                                                   
 79         add             %o1, %o2, %o1             
 80         add             %o0, %o2, %o0             
 81         sub             %o1, 1, %o1               
 82         sub             %o0, 1, %o0               
 83                                                   
 84 1:      /* reverse_bytes */                       
 85                                                   
 86         ldub            [%o1], %o4                
 87         subcc           %o2, 1, %o2               
 88         stb             %o4, [%o0]                
 89         sub             %o1, 1, %o1               
 90         bne             1b                        
 91          sub            %o0, 1, %o0               
 92                                                   
 93         retl                                      
 94          mov            %g7, %o0                  
 95                                                   
 96 /* NOTE: This code is executed just for the ca    
 97          where %src (=%o1) & 3 is != 0.           
 98          We need to align it to 4. So, for (%s    
 99          1 we need to do ldub,lduh                
100          2 lduh                                   
101          3 just ldub                              
102          so even if it looks weird, the branch    
103          are correct here. -jj                    
104  */                                               
105 78:     /* dword_align */                         
106                                                   
107         andcc           %o1, 1, %g0               
108         be              4f                        
109          andcc          %o1, 2, %g0               
110                                                   
111         ldub            [%o1], %g2                
112         add             %o1, 1, %o1               
113         stb             %g2, [%o0]                
114         sub             %o2, 1, %o2               
115         bne             3f                        
116          add            %o0, 1, %o0               
117 4:                                                
118         lduh            [%o1], %g2                
119         add             %o1, 2, %o1               
120         sth             %g2, [%o0]                
121         sub             %o2, 2, %o2               
122         b               3f                        
123          add            %o0, 2, %o0               
124                                                   
125 FUNC(memcpy)    /* %o0=dst %o1=src %o2=len */     
126 EXPORT_SYMBOL(memcpy)                             
127                                                   
128         sub             %o0, %o1, %o4             
129         mov             %o0, %g7                  
130 9:                                                
131         andcc           %o4, 3, %o5               
132 0:                                                
133         bne             86f                       
134          cmp            %o2, 15                   
135                                                   
136         bleu            90f                       
137          andcc          %o1, 3, %g0               
138                                                   
139         bne             78b                       
140 3:                                                
141          andcc          %o1, 4, %g0               
142                                                   
143         be              2f                        
144          mov            %o2, %g1                  
145                                                   
146         ld              [%o1], %o4                
147         sub             %g1, 4, %g1               
148         st              %o4, [%o0]                
149         add             %o1, 4, %o1               
150         add             %o0, 4, %o0               
151 2:                                                
152         andcc           %g1, 0xffffff80, %g0      
153         be              3f                        
154          andcc          %o0, 4, %g0               
155                                                   
156         be              82f + 4                   
157 5:                                                
158         MOVE_BIGCHUNK(o1, o0, 0x00, o2, o3, o4    
159         MOVE_BIGCHUNK(o1, o0, 0x20, o2, o3, o4    
160         MOVE_BIGCHUNK(o1, o0, 0x40, o2, o3, o4    
161         MOVE_BIGCHUNK(o1, o0, 0x60, o2, o3, o4    
162         sub             %g1, 128, %g1             
163         add             %o1, 128, %o1             
164         cmp             %g1, 128                  
165         bge             5b                        
166          add            %o0, 128, %o0             
167 3:                                                
168         andcc           %g1, 0x70, %g4            
169         be              80f                       
170          andcc          %g1, 8, %g0               
171                                                   
172         sethi           %hi(80f), %o5             
173         srl             %g4, 1, %o4               
174         add             %g4, %o4, %o4             
175         add             %o1, %g4, %o1             
176         sub             %o5, %o4, %o5             
177         jmpl            %o5 + %lo(80f), %g0       
178          add            %o0, %g4, %o0             
179                                                   
180 79:     /* memcpy_table */                        
181                                                   
182         MOVE_LASTCHUNK(o1, o0, 0x60, g2, g3, g    
183         MOVE_LASTCHUNK(o1, o0, 0x50, g2, g3, g    
184         MOVE_LASTCHUNK(o1, o0, 0x40, g2, g3, g    
185         MOVE_LASTCHUNK(o1, o0, 0x30, g2, g3, g    
186         MOVE_LASTCHUNK(o1, o0, 0x20, g2, g3, g    
187         MOVE_LASTCHUNK(o1, o0, 0x10, g2, g3, g    
188         MOVE_LASTCHUNK(o1, o0, 0x00, g2, g3, g    
189                                                   
190 80:     /* memcpy_table_end */                    
191         be              81f                       
192          andcc          %g1, 4, %g0               
193                                                   
194         ldd             [%o1], %g2                
195         add             %o0, 8, %o0               
196         st              %g2, [%o0 - 0x08]         
197         add             %o1, 8, %o1               
198         st              %g3, [%o0 - 0x04]         
199                                                   
200 81:     /* memcpy_last7 */                        
201                                                   
202         be              1f                        
203          andcc          %g1, 2, %g0               
204                                                   
205         ld              [%o1], %g2                
206         add             %o1, 4, %o1               
207         st              %g2, [%o0]                
208         add             %o0, 4, %o0               
209 1:                                                
210         be              1f                        
211          andcc          %g1, 1, %g0               
212                                                   
213         lduh            [%o1], %g2                
214         add             %o1, 2, %o1               
215         sth             %g2, [%o0]                
216         add             %o0, 2, %o0               
217 1:                                                
218         be              1f                        
219          nop                                      
220                                                   
221         ldub            [%o1], %g2                
222         stb             %g2, [%o0]                
223 1:                                                
224         retl                                      
225          mov            %g7, %o0                  
226                                                   
227 82:     /* ldd_std */                             
228         MOVE_BIGALIGNCHUNK(o1, o0, 0x00, o2, o    
229         MOVE_BIGALIGNCHUNK(o1, o0, 0x20, o2, o    
230         MOVE_BIGALIGNCHUNK(o1, o0, 0x40, o2, o    
231         MOVE_BIGALIGNCHUNK(o1, o0, 0x60, o2, o    
232         subcc           %g1, 128, %g1             
233         add             %o1, 128, %o1             
234         cmp             %g1, 128                  
235         bge             82b                       
236          add            %o0, 128, %o0             
237                                                   
238         andcc           %g1, 0x70, %g4            
239         be              84f                       
240          andcc          %g1, 8, %g0               
241                                                   
242         sethi           %hi(84f), %o5             
243         add             %o1, %g4, %o1             
244         sub             %o5, %g4, %o5             
245         jmpl            %o5 + %lo(84f), %g0       
246          add            %o0, %g4, %o0             
247                                                   
248 83:     /* amemcpy_table */                       
249                                                   
250         MOVE_LASTALIGNCHUNK(o1, o0, 0x60, g2,     
251         MOVE_LASTALIGNCHUNK(o1, o0, 0x50, g2,     
252         MOVE_LASTALIGNCHUNK(o1, o0, 0x40, g2,     
253         MOVE_LASTALIGNCHUNK(o1, o0, 0x30, g2,     
254         MOVE_LASTALIGNCHUNK(o1, o0, 0x20, g2,     
255         MOVE_LASTALIGNCHUNK(o1, o0, 0x10, g2,     
256         MOVE_LASTALIGNCHUNK(o1, o0, 0x00, g2,     
257                                                   
258 84:     /* amemcpy_table_end */                   
259         be              85f                       
260          andcc          %g1, 4, %g0               
261                                                   
262         ldd             [%o1], %g2                
263         add             %o0, 8, %o0               
264         std             %g2, [%o0 - 0x08]         
265         add             %o1, 8, %o1               
266 85:     /* amemcpy_last7 */                       
267         be              1f                        
268          andcc          %g1, 2, %g0               
269                                                   
270         ld              [%o1], %g2                
271         add             %o1, 4, %o1               
272         st              %g2, [%o0]                
273         add             %o0, 4, %o0               
274 1:                                                
275         be              1f                        
276          andcc          %g1, 1, %g0               
277                                                   
278         lduh            [%o1], %g2                
279         add             %o1, 2, %o1               
280         sth             %g2, [%o0]                
281         add             %o0, 2, %o0               
282 1:                                                
283         be              1f                        
284          nop                                      
285                                                   
286         ldub            [%o1], %g2                
287         stb             %g2, [%o0]                
288 1:                                                
289         retl                                      
290          mov            %g7, %o0                  
291                                                   
292 86:     /* non_aligned */                         
293         cmp             %o2, 6                    
294         bleu            88f                       
295          nop                                      
296                                                   
297         save            %sp, -96, %sp             
298         andcc           %i0, 3, %g0               
299         be              61f                       
300          andcc          %i0, 1, %g0               
301         be              60f                       
302          andcc          %i0, 2, %g0               
303                                                   
304         ldub            [%i1], %g5                
305         add             %i1, 1, %i1               
306         stb             %g5, [%i0]                
307         sub             %i2, 1, %i2               
308         bne             61f                       
309          add            %i0, 1, %i0               
310 60:                                               
311         ldub            [%i1], %g3                
312         add             %i1, 2, %i1               
313         stb             %g3, [%i0]                
314         sub             %i2, 2, %i2               
315         ldub            [%i1 - 1], %g3            
316         add             %i0, 2, %i0               
317         stb             %g3, [%i0 - 1]            
318 61:                                               
319         and             %i1, 3, %g2               
320         and             %i2, 0xc, %g3             
321         and             %i1, -4, %i1              
322         cmp             %g3, 4                    
323         sll             %g2, 3, %g4               
324         mov             32, %g2                   
325         be              4f                        
326          sub            %g2, %g4, %l0             
327                                                   
328         blu             3f                        
329          cmp            %g3, 0x8                  
330                                                   
331         be              2f                        
332          srl            %i2, 2, %g3               
333                                                   
334         ld              [%i1], %i3                
335         add             %i0, -8, %i0              
336         ld              [%i1 + 4], %i4            
337         b               8f                        
338          add            %g3, 1, %g3               
339 2:                                                
340         ld              [%i1], %i4                
341         add             %i0, -12, %i0             
342         ld              [%i1 + 4], %i5            
343         add             %g3, 2, %g3               
344         b               9f                        
345          add            %i1, -4, %i1              
346 3:                                                
347         ld              [%i1], %g1                
348         add             %i0, -4, %i0              
349         ld              [%i1 + 4], %i3            
350         srl             %i2, 2, %g3               
351         b               7f                        
352          add            %i1, 4, %i1               
353 4:                                                
354         ld              [%i1], %i5                
355         cmp             %i2, 7                    
356         ld              [%i1 + 4], %g1            
357         srl             %i2, 2, %g3               
358         bleu            10f                       
359          add            %i1, 8, %i1               
360                                                   
361         ld              [%i1], %i3                
362         add             %g3, -1, %g3              
363 5:                                                
364         sll             %i5, %g4, %g2             
365         srl             %g1, %l0, %g5             
366         or              %g2, %g5, %g2             
367         st              %g2, [%i0]                
368 7:                                                
369         ld              [%i1 + 4], %i4            
370         sll             %g1, %g4, %g2             
371         srl             %i3, %l0, %g5             
372         or              %g2, %g5, %g2             
373         st              %g2, [%i0 + 4]            
374 8:                                                
375         ld              [%i1 + 8], %i5            
376         sll             %i3, %g4, %g2             
377         srl             %i4, %l0, %g5             
378         or              %g2, %g5, %g2             
379         st              %g2, [%i0 + 8]            
380 9:                                                
381         ld              [%i1 + 12], %g1           
382         sll             %i4, %g4, %g2             
383         srl             %i5, %l0, %g5             
384         addcc           %g3, -4, %g3              
385         or              %g2, %g5, %g2             
386         add             %i1, 16, %i1              
387         st              %g2, [%i0 + 12]           
388         add             %i0, 16, %i0              
389         bne,a           5b                        
390          ld             [%i1], %i3                
391 10:                                               
392         sll             %i5, %g4, %g2             
393         srl             %g1, %l0, %g5             
394         srl             %l0, 3, %g3               
395         or              %g2, %g5, %g2             
396         sub             %i1, %g3, %i1             
397         andcc           %i2, 2, %g0               
398         st              %g2, [%i0]                
399         be              1f                        
400          andcc          %i2, 1, %g0               
401                                                   
402         ldub            [%i1], %g2                
403         add             %i1, 2, %i1               
404         stb             %g2, [%i0 + 4]            
405         add             %i0, 2, %i0               
406         ldub            [%i1 - 1], %g2            
407         stb             %g2, [%i0 + 3]            
408 1:                                                
409         be              1f                        
410          nop                                      
411         ldub            [%i1], %g2                
412         stb             %g2, [%i0 + 4]            
413 1:                                                
414         ret                                       
415          restore        %g7, %g0, %o0             
416                                                   
417 88:     /* short_end */                           
418                                                   
419         and             %o2, 0xe, %o3             
420 20:                                               
421         sethi           %hi(89f), %o5             
422         sll             %o3, 3, %o4               
423         add             %o0, %o3, %o0             
424         sub             %o5, %o4, %o5             
425         add             %o1, %o3, %o1             
426         jmpl            %o5 + %lo(89f), %g0       
427          andcc          %o2, 1, %g0               
428                                                   
429         MOVE_SHORTCHUNK(o1, o0, 0x0c, g2, g3)     
430         MOVE_SHORTCHUNK(o1, o0, 0x0a, g2, g3)     
431         MOVE_SHORTCHUNK(o1, o0, 0x08, g2, g3)     
432         MOVE_SHORTCHUNK(o1, o0, 0x06, g2, g3)     
433         MOVE_SHORTCHUNK(o1, o0, 0x04, g2, g3)     
434         MOVE_SHORTCHUNK(o1, o0, 0x02, g2, g3)     
435         MOVE_SHORTCHUNK(o1, o0, 0x00, g2, g3)     
436                                                   
437 89:     /* short_table_end */                     
438                                                   
439         be              1f                        
440          nop                                      
441                                                   
442         ldub            [%o1], %g2                
443         stb             %g2, [%o0]                
444 1:                                                
445         retl                                      
446          mov            %g7, %o0                  
447                                                   
448 90:     /* short_aligned_end */                   
449         bne             88b                       
450          andcc          %o2, 8, %g0               
451                                                   
452         be              1f                        
453          andcc          %o2, 4, %g0               
454                                                   
455         ld              [%o1 + 0x00], %g2         
456         ld              [%o1 + 0x04], %g3         
457         add             %o1, 8, %o1               
458         st              %g2, [%o0 + 0x00]         
459         st              %g3, [%o0 + 0x04]         
460         add             %o0, 8, %o0               
461 1:                                                
462         b               81b                       
463          mov            %o2, %g1                  
                                                      

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