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Linux/arch/sparc/lib/bzero.S

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Diff markup

Differences between /arch/sparc/lib/bzero.S (Version linux-6.11.5) and /arch/sparc/lib/bzero.S (Version linux-4.4.302)


  1 /* SPDX-License-Identifier: GPL-2.0 */         << 
  2 /* bzero.S: Simple prefetching memset, bzero,       1 /* bzero.S: Simple prefetching memset, bzero, and clear_user
  3  *          implementations.                        2  *          implementations.
  4  *                                                  3  *
  5  * Copyright (C) 2005 David S. Miller <davem@da      4  * Copyright (C) 2005 David S. Miller <davem@davemloft.net>
  6  */                                                 5  */
  7                                                     6 
  8 #include <linux/export.h>                      << 
  9 #include <linux/linkage.h>                          7 #include <linux/linkage.h>
 10                                                     8 
 11         .text                                       9         .text
 12                                                    10 
 13 ENTRY(memset) /* %o0=buf, %o1=pat, %o2=len */      11 ENTRY(memset) /* %o0=buf, %o1=pat, %o2=len */
 14         and             %o1, 0xff, %o3             12         and             %o1, 0xff, %o3
 15         mov             %o2, %o1                   13         mov             %o2, %o1
 16         sllx            %o3, 8, %g1                14         sllx            %o3, 8, %g1
 17         or              %g1, %o3, %o2              15         or              %g1, %o3, %o2
 18         sllx            %o2, 16, %g1               16         sllx            %o2, 16, %g1
 19         or              %g1, %o2, %o2              17         or              %g1, %o2, %o2
 20         sllx            %o2, 32, %g1               18         sllx            %o2, 32, %g1
 21         ba,pt           %xcc, 1f                   19         ba,pt           %xcc, 1f
 22          or             %g1, %o2, %o2              20          or             %g1, %o2, %o2
 23                                                    21 
 24 ENTRY(__bzero) /* %o0=buf, %o1=len */              22 ENTRY(__bzero) /* %o0=buf, %o1=len */
 25         clr             %o2                        23         clr             %o2
 26 1:      mov             %o0, %o3                   24 1:      mov             %o0, %o3
 27         brz,pn          %o1, __bzero_done          25         brz,pn          %o1, __bzero_done
 28          cmp            %o1, 16                    26          cmp            %o1, 16
 29         bl,pn           %icc, __bzero_tiny         27         bl,pn           %icc, __bzero_tiny
 30          prefetch       [%o0 + 0x000], #n_writ     28          prefetch       [%o0 + 0x000], #n_writes
 31         andcc           %o0, 0x3, %g0              29         andcc           %o0, 0x3, %g0
 32         be,pt           %icc, 2f                   30         be,pt           %icc, 2f
 33 1:       stb            %o2, [%o0 + 0x00]          31 1:       stb            %o2, [%o0 + 0x00]
 34         add             %o0, 1, %o0                32         add             %o0, 1, %o0
 35         andcc           %o0, 0x3, %g0              33         andcc           %o0, 0x3, %g0
 36         bne,pn          %icc, 1b                   34         bne,pn          %icc, 1b
 37          sub            %o1, 1, %o1                35          sub            %o1, 1, %o1
 38 2:      andcc           %o0, 0x7, %g0              36 2:      andcc           %o0, 0x7, %g0
 39         be,pt           %icc, 3f                   37         be,pt           %icc, 3f
 40          stw            %o2, [%o0 + 0x00]          38          stw            %o2, [%o0 + 0x00]
 41         sub             %o1, 4, %o1                39         sub             %o1, 4, %o1
 42         add             %o0, 4, %o0                40         add             %o0, 4, %o0
 43 3:      and             %o1, 0x38, %g1             41 3:      and             %o1, 0x38, %g1
 44         cmp             %o1, 0x40                  42         cmp             %o1, 0x40
 45         andn            %o1, 0x3f, %o4             43         andn            %o1, 0x3f, %o4
 46         bl,pn           %icc, 5f                   44         bl,pn           %icc, 5f
 47          and            %o1, 0x7, %o1              45          and            %o1, 0x7, %o1
 48         prefetch        [%o0 + 0x040], #n_writ     46         prefetch        [%o0 + 0x040], #n_writes
 49         prefetch        [%o0 + 0x080], #n_writ     47         prefetch        [%o0 + 0x080], #n_writes
 50         prefetch        [%o0 + 0x0c0], #n_writ     48         prefetch        [%o0 + 0x0c0], #n_writes
 51         prefetch        [%o0 + 0x100], #n_writ     49         prefetch        [%o0 + 0x100], #n_writes
 52         prefetch        [%o0 + 0x140], #n_writ     50         prefetch        [%o0 + 0x140], #n_writes
 53 4:      prefetch        [%o0 + 0x180], #n_writ     51 4:      prefetch        [%o0 + 0x180], #n_writes
 54         stx             %o2, [%o0 + 0x00]          52         stx             %o2, [%o0 + 0x00]
 55         stx             %o2, [%o0 + 0x08]          53         stx             %o2, [%o0 + 0x08]
 56         stx             %o2, [%o0 + 0x10]          54         stx             %o2, [%o0 + 0x10]
 57         stx             %o2, [%o0 + 0x18]          55         stx             %o2, [%o0 + 0x18]
 58         stx             %o2, [%o0 + 0x20]          56         stx             %o2, [%o0 + 0x20]
 59         stx             %o2, [%o0 + 0x28]          57         stx             %o2, [%o0 + 0x28]
 60         stx             %o2, [%o0 + 0x30]          58         stx             %o2, [%o0 + 0x30]
 61         stx             %o2, [%o0 + 0x38]          59         stx             %o2, [%o0 + 0x38]
 62         subcc           %o4, 0x40, %o4             60         subcc           %o4, 0x40, %o4
 63         bne,pt          %icc, 4b                   61         bne,pt          %icc, 4b
 64          add            %o0, 0x40, %o0             62          add            %o0, 0x40, %o0
 65         brz,pn          %g1, 6f                    63         brz,pn          %g1, 6f
 66          nop                                       64          nop
 67 5:      stx             %o2, [%o0 + 0x00]          65 5:      stx             %o2, [%o0 + 0x00]
 68         subcc           %g1, 8, %g1                66         subcc           %g1, 8, %g1
 69         bne,pt          %icc, 5b                   67         bne,pt          %icc, 5b
 70          add            %o0, 0x8, %o0              68          add            %o0, 0x8, %o0
 71 6:      brz,pt          %o1, __bzero_done          69 6:      brz,pt          %o1, __bzero_done
 72          nop                                       70          nop
 73 __bzero_tiny:                                      71 __bzero_tiny:
 74 1:      stb             %o2, [%o0 + 0x00]          72 1:      stb             %o2, [%o0 + 0x00]
 75         subcc           %o1, 1, %o1                73         subcc           %o1, 1, %o1
 76         bne,pt          %icc, 1b                   74         bne,pt          %icc, 1b
 77          add            %o0, 1, %o0                75          add            %o0, 1, %o0
 78 __bzero_done:                                      76 __bzero_done:
 79         retl                                       77         retl
 80          mov            %o3, %o0                   78          mov            %o3, %o0
 81 ENDPROC(__bzero)                                   79 ENDPROC(__bzero)
 82 ENDPROC(memset)                                    80 ENDPROC(memset)
 83 EXPORT_SYMBOL(__bzero)                         << 
 84 EXPORT_SYMBOL(memset)                          << 
 85                                                    81 
 86 #define EX_ST(x,y)              \                  82 #define EX_ST(x,y)              \
 87 98:     x,y;                    \                  83 98:     x,y;                    \
 88         .section __ex_table,"a";\                  84         .section __ex_table,"a";\
 89         .align 4;               \                  85         .align 4;               \
 90         .word 98b, __retl_o1;   \                  86         .word 98b, __retl_o1;   \
 91         .text;                  \                  87         .text;                  \
 92         .align 4;                                  88         .align 4;
 93                                                    89 
 94 ENTRY(__clear_user) /* %o0=buf, %o1=len */         90 ENTRY(__clear_user) /* %o0=buf, %o1=len */
 95         brz,pn          %o1, __clear_user_done     91         brz,pn          %o1, __clear_user_done
 96          cmp            %o1, 16                    92          cmp            %o1, 16
 97         bl,pn           %icc, __clear_user_tin     93         bl,pn           %icc, __clear_user_tiny
 98          EX_ST(prefetcha [%o0 + 0x00] %asi, #n     94          EX_ST(prefetcha [%o0 + 0x00] %asi, #n_writes)
 99         andcc           %o0, 0x3, %g0              95         andcc           %o0, 0x3, %g0
100         be,pt           %icc, 2f                   96         be,pt           %icc, 2f
101 1:       EX_ST(stba     %g0, [%o0 + 0x00] %asi     97 1:       EX_ST(stba     %g0, [%o0 + 0x00] %asi)
102         add             %o0, 1, %o0                98         add             %o0, 1, %o0
103         andcc           %o0, 0x3, %g0              99         andcc           %o0, 0x3, %g0
104         bne,pn          %icc, 1b                  100         bne,pn          %icc, 1b
105          sub            %o1, 1, %o1               101          sub            %o1, 1, %o1
106 2:      andcc           %o0, 0x7, %g0             102 2:      andcc           %o0, 0x7, %g0
107         be,pt           %icc, 3f                  103         be,pt           %icc, 3f
108          EX_ST(stwa     %g0, [%o0 + 0x00] %asi    104          EX_ST(stwa     %g0, [%o0 + 0x00] %asi)
109         sub             %o1, 4, %o1               105         sub             %o1, 4, %o1
110         add             %o0, 4, %o0               106         add             %o0, 4, %o0
111 3:      and             %o1, 0x38, %g1            107 3:      and             %o1, 0x38, %g1
112         cmp             %o1, 0x40                 108         cmp             %o1, 0x40
113         andn            %o1, 0x3f, %o4            109         andn            %o1, 0x3f, %o4
114         bl,pn           %icc, 5f                  110         bl,pn           %icc, 5f
115          and            %o1, 0x7, %o1             111          and            %o1, 0x7, %o1
116         EX_ST(prefetcha [%o0 + 0x040] %asi, #n    112         EX_ST(prefetcha [%o0 + 0x040] %asi, #n_writes)
117         EX_ST(prefetcha [%o0 + 0x080] %asi, #n    113         EX_ST(prefetcha [%o0 + 0x080] %asi, #n_writes)
118         EX_ST(prefetcha [%o0 + 0x0c0] %asi, #n    114         EX_ST(prefetcha [%o0 + 0x0c0] %asi, #n_writes)
119         EX_ST(prefetcha [%o0 + 0x100] %asi, #n    115         EX_ST(prefetcha [%o0 + 0x100] %asi, #n_writes)
120         EX_ST(prefetcha [%o0 + 0x140] %asi, #n    116         EX_ST(prefetcha [%o0 + 0x140] %asi, #n_writes)
121 4:      EX_ST(prefetcha [%o0 + 0x180] %asi, #n    117 4:      EX_ST(prefetcha [%o0 + 0x180] %asi, #n_writes)
122         EX_ST(stxa      %g0, [%o0 + 0x00] %asi    118         EX_ST(stxa      %g0, [%o0 + 0x00] %asi)
123         EX_ST(stxa      %g0, [%o0 + 0x08] %asi    119         EX_ST(stxa      %g0, [%o0 + 0x08] %asi)
124         EX_ST(stxa      %g0, [%o0 + 0x10] %asi    120         EX_ST(stxa      %g0, [%o0 + 0x10] %asi)
125         EX_ST(stxa      %g0, [%o0 + 0x18] %asi    121         EX_ST(stxa      %g0, [%o0 + 0x18] %asi)
126         EX_ST(stxa      %g0, [%o0 + 0x20] %asi    122         EX_ST(stxa      %g0, [%o0 + 0x20] %asi)
127         EX_ST(stxa      %g0, [%o0 + 0x28] %asi    123         EX_ST(stxa      %g0, [%o0 + 0x28] %asi)
128         EX_ST(stxa      %g0, [%o0 + 0x30] %asi    124         EX_ST(stxa      %g0, [%o0 + 0x30] %asi)
129         EX_ST(stxa      %g0, [%o0 + 0x38] %asi    125         EX_ST(stxa      %g0, [%o0 + 0x38] %asi)
130         subcc           %o4, 0x40, %o4            126         subcc           %o4, 0x40, %o4
131         bne,pt          %icc, 4b                  127         bne,pt          %icc, 4b
132          add            %o0, 0x40, %o0            128          add            %o0, 0x40, %o0
133         brz,pn          %g1, 6f                   129         brz,pn          %g1, 6f
134          nop                                      130          nop
135 5:      EX_ST(stxa      %g0, [%o0 + 0x00] %asi    131 5:      EX_ST(stxa      %g0, [%o0 + 0x00] %asi)
136         subcc           %g1, 8, %g1               132         subcc           %g1, 8, %g1
137         bne,pt          %icc, 5b                  133         bne,pt          %icc, 5b
138          add            %o0, 0x8, %o0             134          add            %o0, 0x8, %o0
139 6:      brz,pt          %o1, __clear_user_done    135 6:      brz,pt          %o1, __clear_user_done
140          nop                                      136          nop
141 __clear_user_tiny:                                137 __clear_user_tiny:
142 1:      EX_ST(stba      %g0, [%o0 + 0x00] %asi    138 1:      EX_ST(stba      %g0, [%o0 + 0x00] %asi)
143         subcc           %o1, 1, %o1               139         subcc           %o1, 1, %o1
144         bne,pt          %icc, 1b                  140         bne,pt          %icc, 1b
145          add            %o0, 1, %o0               141          add            %o0, 1, %o0
146 __clear_user_done:                                142 __clear_user_done:
147         retl                                      143         retl
148          clr            %o0                       144          clr            %o0
149 ENDPROC(__clear_user)                             145 ENDPROC(__clear_user)
150 EXPORT_SYMBOL(__clear_user)                    << 
                                                      

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