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Linux/arch/sparc/lib/bitops.S

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Diff markup

Differences between /arch/sparc/lib/bitops.S (Version linux-6.12-rc7) and /arch/sparc/lib/bitops.S (Version linux-6.6.60)


  1 /* SPDX-License-Identifier: GPL-2.0 */              1 /* SPDX-License-Identifier: GPL-2.0 */
  2 /* bitops.S: Sparc64 atomic bit operations.         2 /* bitops.S: Sparc64 atomic bit operations.
  3  *                                                  3  *
  4  * Copyright (C) 2000, 2007 David S. Miller (d      4  * Copyright (C) 2000, 2007 David S. Miller (davem@davemloft.net)
  5  */                                                 5  */
  6                                                     6 
  7 #include <linux/export.h>                           7 #include <linux/export.h>
  8 #include <linux/linkage.h>                          8 #include <linux/linkage.h>
  9 #include <asm/asi.h>                                9 #include <asm/asi.h>
 10 #include <asm/backoff.h>                           10 #include <asm/backoff.h>
 11                                                    11 
 12         .text                                      12         .text
 13                                                    13 
 14 ENTRY(test_and_set_bit) /* %o0=nr, %o1=addr */     14 ENTRY(test_and_set_bit) /* %o0=nr, %o1=addr */
 15         BACKOFF_SETUP(%o3)                         15         BACKOFF_SETUP(%o3)
 16         srlx    %o0, 6, %g1                        16         srlx    %o0, 6, %g1
 17         mov     1, %o2                             17         mov     1, %o2
 18         sllx    %g1, 3, %g3                        18         sllx    %g1, 3, %g3
 19         and     %o0, 63, %g2                       19         and     %o0, 63, %g2
 20         sllx    %o2, %g2, %o2                      20         sllx    %o2, %g2, %o2
 21         add     %o1, %g3, %o1                      21         add     %o1, %g3, %o1
 22 1:      ldx     [%o1], %g7                         22 1:      ldx     [%o1], %g7
 23         or      %g7, %o2, %g1                      23         or      %g7, %o2, %g1
 24         casx    [%o1], %g7, %g1                    24         casx    [%o1], %g7, %g1
 25         cmp     %g7, %g1                           25         cmp     %g7, %g1
 26         bne,pn  %xcc, BACKOFF_LABEL(2f, 1b)        26         bne,pn  %xcc, BACKOFF_LABEL(2f, 1b)
 27          and    %g7, %o2, %g2                      27          and    %g7, %o2, %g2
 28         clr     %o0                                28         clr     %o0
 29         movrne  %g2, 1, %o0                        29         movrne  %g2, 1, %o0
 30         retl                                       30         retl
 31          nop                                       31          nop
 32 2:      BACKOFF_SPIN(%o3, %o4, 1b)                 32 2:      BACKOFF_SPIN(%o3, %o4, 1b)
 33 ENDPROC(test_and_set_bit)                          33 ENDPROC(test_and_set_bit)
 34 EXPORT_SYMBOL(test_and_set_bit)                    34 EXPORT_SYMBOL(test_and_set_bit)
 35                                                    35 
 36 ENTRY(test_and_clear_bit) /* %o0=nr, %o1=addr      36 ENTRY(test_and_clear_bit) /* %o0=nr, %o1=addr */
 37         BACKOFF_SETUP(%o3)                         37         BACKOFF_SETUP(%o3)
 38         srlx    %o0, 6, %g1                        38         srlx    %o0, 6, %g1
 39         mov     1, %o2                             39         mov     1, %o2
 40         sllx    %g1, 3, %g3                        40         sllx    %g1, 3, %g3
 41         and     %o0, 63, %g2                       41         and     %o0, 63, %g2
 42         sllx    %o2, %g2, %o2                      42         sllx    %o2, %g2, %o2
 43         add     %o1, %g3, %o1                      43         add     %o1, %g3, %o1
 44 1:      ldx     [%o1], %g7                         44 1:      ldx     [%o1], %g7
 45         andn    %g7, %o2, %g1                      45         andn    %g7, %o2, %g1
 46         casx    [%o1], %g7, %g1                    46         casx    [%o1], %g7, %g1
 47         cmp     %g7, %g1                           47         cmp     %g7, %g1
 48         bne,pn  %xcc, BACKOFF_LABEL(2f, 1b)        48         bne,pn  %xcc, BACKOFF_LABEL(2f, 1b)
 49          and    %g7, %o2, %g2                      49          and    %g7, %o2, %g2
 50         clr     %o0                                50         clr     %o0
 51         movrne  %g2, 1, %o0                        51         movrne  %g2, 1, %o0
 52         retl                                       52         retl
 53          nop                                       53          nop
 54 2:      BACKOFF_SPIN(%o3, %o4, 1b)                 54 2:      BACKOFF_SPIN(%o3, %o4, 1b)
 55 ENDPROC(test_and_clear_bit)                        55 ENDPROC(test_and_clear_bit)
 56 EXPORT_SYMBOL(test_and_clear_bit)                  56 EXPORT_SYMBOL(test_and_clear_bit)
 57                                                    57 
 58 ENTRY(test_and_change_bit) /* %o0=nr, %o1=addr     58 ENTRY(test_and_change_bit) /* %o0=nr, %o1=addr */
 59         BACKOFF_SETUP(%o3)                         59         BACKOFF_SETUP(%o3)
 60         srlx    %o0, 6, %g1                        60         srlx    %o0, 6, %g1
 61         mov     1, %o2                             61         mov     1, %o2
 62         sllx    %g1, 3, %g3                        62         sllx    %g1, 3, %g3
 63         and     %o0, 63, %g2                       63         and     %o0, 63, %g2
 64         sllx    %o2, %g2, %o2                      64         sllx    %o2, %g2, %o2
 65         add     %o1, %g3, %o1                      65         add     %o1, %g3, %o1
 66 1:      ldx     [%o1], %g7                         66 1:      ldx     [%o1], %g7
 67         xor     %g7, %o2, %g1                      67         xor     %g7, %o2, %g1
 68         casx    [%o1], %g7, %g1                    68         casx    [%o1], %g7, %g1
 69         cmp     %g7, %g1                           69         cmp     %g7, %g1
 70         bne,pn  %xcc, BACKOFF_LABEL(2f, 1b)        70         bne,pn  %xcc, BACKOFF_LABEL(2f, 1b)
 71          and    %g7, %o2, %g2                      71          and    %g7, %o2, %g2
 72         clr     %o0                                72         clr     %o0
 73         movrne  %g2, 1, %o0                        73         movrne  %g2, 1, %o0
 74         retl                                       74         retl
 75          nop                                       75          nop
 76 2:      BACKOFF_SPIN(%o3, %o4, 1b)                 76 2:      BACKOFF_SPIN(%o3, %o4, 1b)
 77 ENDPROC(test_and_change_bit)                       77 ENDPROC(test_and_change_bit)
 78 EXPORT_SYMBOL(test_and_change_bit)                 78 EXPORT_SYMBOL(test_and_change_bit)
 79                                                    79 
 80 ENTRY(set_bit) /* %o0=nr, %o1=addr */              80 ENTRY(set_bit) /* %o0=nr, %o1=addr */
 81         BACKOFF_SETUP(%o3)                         81         BACKOFF_SETUP(%o3)
 82         srlx    %o0, 6, %g1                        82         srlx    %o0, 6, %g1
 83         mov     1, %o2                             83         mov     1, %o2
 84         sllx    %g1, 3, %g3                        84         sllx    %g1, 3, %g3
 85         and     %o0, 63, %g2                       85         and     %o0, 63, %g2
 86         sllx    %o2, %g2, %o2                      86         sllx    %o2, %g2, %o2
 87         add     %o1, %g3, %o1                      87         add     %o1, %g3, %o1
 88 1:      ldx     [%o1], %g7                         88 1:      ldx     [%o1], %g7
 89         or      %g7, %o2, %g1                      89         or      %g7, %o2, %g1
 90         casx    [%o1], %g7, %g1                    90         casx    [%o1], %g7, %g1
 91         cmp     %g7, %g1                           91         cmp     %g7, %g1
 92         bne,pn  %xcc, BACKOFF_LABEL(2f, 1b)        92         bne,pn  %xcc, BACKOFF_LABEL(2f, 1b)
 93          nop                                       93          nop
 94         retl                                       94         retl
 95          nop                                       95          nop
 96 2:      BACKOFF_SPIN(%o3, %o4, 1b)                 96 2:      BACKOFF_SPIN(%o3, %o4, 1b)
 97 ENDPROC(set_bit)                                   97 ENDPROC(set_bit)
 98 EXPORT_SYMBOL(set_bit)                             98 EXPORT_SYMBOL(set_bit)
 99                                                    99 
100 ENTRY(clear_bit) /* %o0=nr, %o1=addr */           100 ENTRY(clear_bit) /* %o0=nr, %o1=addr */
101         BACKOFF_SETUP(%o3)                        101         BACKOFF_SETUP(%o3)
102         srlx    %o0, 6, %g1                       102         srlx    %o0, 6, %g1
103         mov     1, %o2                            103         mov     1, %o2
104         sllx    %g1, 3, %g3                       104         sllx    %g1, 3, %g3
105         and     %o0, 63, %g2                      105         and     %o0, 63, %g2
106         sllx    %o2, %g2, %o2                     106         sllx    %o2, %g2, %o2
107         add     %o1, %g3, %o1                     107         add     %o1, %g3, %o1
108 1:      ldx     [%o1], %g7                        108 1:      ldx     [%o1], %g7
109         andn    %g7, %o2, %g1                     109         andn    %g7, %o2, %g1
110         casx    [%o1], %g7, %g1                   110         casx    [%o1], %g7, %g1
111         cmp     %g7, %g1                          111         cmp     %g7, %g1
112         bne,pn  %xcc, BACKOFF_LABEL(2f, 1b)       112         bne,pn  %xcc, BACKOFF_LABEL(2f, 1b)
113          nop                                      113          nop
114         retl                                      114         retl
115          nop                                      115          nop
116 2:      BACKOFF_SPIN(%o3, %o4, 1b)                116 2:      BACKOFF_SPIN(%o3, %o4, 1b)
117 ENDPROC(clear_bit)                                117 ENDPROC(clear_bit)
118 EXPORT_SYMBOL(clear_bit)                          118 EXPORT_SYMBOL(clear_bit)
119                                                   119 
120 ENTRY(change_bit) /* %o0=nr, %o1=addr */          120 ENTRY(change_bit) /* %o0=nr, %o1=addr */
121         BACKOFF_SETUP(%o3)                        121         BACKOFF_SETUP(%o3)
122         srlx    %o0, 6, %g1                       122         srlx    %o0, 6, %g1
123         mov     1, %o2                            123         mov     1, %o2
124         sllx    %g1, 3, %g3                       124         sllx    %g1, 3, %g3
125         and     %o0, 63, %g2                      125         and     %o0, 63, %g2
126         sllx    %o2, %g2, %o2                     126         sllx    %o2, %g2, %o2
127         add     %o1, %g3, %o1                     127         add     %o1, %g3, %o1
128 1:      ldx     [%o1], %g7                        128 1:      ldx     [%o1], %g7
129         xor     %g7, %o2, %g1                     129         xor     %g7, %o2, %g1
130         casx    [%o1], %g7, %g1                   130         casx    [%o1], %g7, %g1
131         cmp     %g7, %g1                          131         cmp     %g7, %g1
132         bne,pn  %xcc, BACKOFF_LABEL(2f, 1b)       132         bne,pn  %xcc, BACKOFF_LABEL(2f, 1b)
133          nop                                      133          nop
134         retl                                      134         retl
135          nop                                      135          nop
136 2:      BACKOFF_SPIN(%o3, %o4, 1b)                136 2:      BACKOFF_SPIN(%o3, %o4, 1b)
137 ENDPROC(change_bit)                               137 ENDPROC(change_bit)
138 EXPORT_SYMBOL(change_bit)                         138 EXPORT_SYMBOL(change_bit)
                                                      

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