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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-3.10.108)


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

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