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Linux/arch/sparc/lib/NG4memset.S

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Diff markup

Differences between /arch/sparc/lib/NG4memset.S (Architecture i386) and /arch/alpha/lib/NG4memset.S (Architecture alpha)


  1 /* SPDX-License-Identifier: GPL-2.0 */            
  2 /* NG4memset.S: Niagara-4 optimized memset/bze    
  3  *                                                
  4  * Copyright (C) 2012 David S. Miller (davem@d    
  5  */                                               
  6                                                   
  7 #include <asm/asi.h>                              
  8                                                   
  9         .register       %g2, #scratch             
 10         .register       %g3, #scratch             
 11                                                   
 12         .text                                     
 13         .align          32                        
 14         .globl          NG4memset                 
 15 NG4memset:                                        
 16         andcc           %o1, 0xff, %o4            
 17         be,pt           %icc, 1f                  
 18          mov            %o2, %o1                  
 19         sllx            %o4, 8, %g1               
 20         or              %g1, %o4, %o2             
 21         sllx            %o2, 16, %g1              
 22         or              %g1, %o2, %o2             
 23         sllx            %o2, 32, %g1              
 24         ba,pt           %icc, 1f                  
 25          or             %g1, %o2, %o4             
 26         .size           NG4memset,.-NG4memset     
 27                                                   
 28         .align          32                        
 29         .globl          NG4bzero                  
 30 NG4bzero:                                         
 31         clr             %o4                       
 32 1:      cmp             %o1, 16                   
 33         ble             %icc, .Ltiny              
 34          mov            %o0, %o3                  
 35         sub             %g0, %o0, %g1             
 36         and             %g1, 0x7, %g1             
 37         brz,pt          %g1, .Laligned8           
 38          sub            %o1, %g1, %o1             
 39 1:      stb             %o4, [%o0 + 0x00]         
 40         subcc           %g1, 1, %g1               
 41         bne,pt          %icc, 1b                  
 42          add            %o0, 1, %o0               
 43 .Laligned8:                                       
 44         cmp             %o1, 64 + (64 - 8)        
 45         ble             .Lmedium                  
 46          sub            %g0, %o0, %g1             
 47         andcc           %g1, (64 - 1), %g1        
 48         brz,pn          %g1, .Laligned64          
 49          sub            %o1, %g1, %o1             
 50 1:      stx             %o4, [%o0 + 0x00]         
 51         subcc           %g1, 8, %g1               
 52         bne,pt          %icc, 1b                  
 53          add            %o0, 0x8, %o0             
 54 .Laligned64:                                      
 55         andn            %o1, 64 - 1, %g1          
 56         sub             %o1, %g1, %o1             
 57         brnz,pn         %o4, .Lnon_bzero_loop     
 58          mov            0x20, %g2                 
 59 1:      stxa            %o4, [%o0 + %g0] ASI_B    
 60         subcc           %g1, 0x40, %g1            
 61         stxa            %o4, [%o0 + %g2] ASI_B    
 62         bne,pt          %icc, 1b                  
 63          add            %o0, 0x40, %o0            
 64 .Lpostloop:                                       
 65         cmp             %o1, 8                    
 66         bl,pn           %icc, .Ltiny              
 67          membar         #StoreStore|#StoreLoad    
 68 .Lmedium:                                         
 69         andn            %o1, 0x7, %g1             
 70         sub             %o1, %g1, %o1             
 71 1:      stx             %o4, [%o0 + 0x00]         
 72         subcc           %g1, 0x8, %g1             
 73         bne,pt          %icc, 1b                  
 74          add            %o0, 0x08, %o0            
 75         andcc           %o1, 0x4, %g1             
 76         be,pt           %icc, .Ltiny              
 77          sub            %o1, %g1, %o1             
 78         stw             %o4, [%o0 + 0x00]         
 79         add             %o0, 0x4, %o0             
 80 .Ltiny:                                           
 81         cmp             %o1, 0                    
 82         be,pn           %icc, .Lexit              
 83 1:       subcc          %o1, 1, %o1               
 84         stb             %o4, [%o0 + 0x00]         
 85         bne,pt          %icc, 1b                  
 86          add            %o0, 1, %o0               
 87 .Lexit:                                           
 88         retl                                      
 89          mov            %o3, %o0                  
 90 .Lnon_bzero_loop:                                 
 91         mov             0x08, %g3                 
 92         mov             0x28, %o5                 
 93 1:      stxa            %o4, [%o0 + %g0] ASI_B    
 94         subcc           %g1, 0x40, %g1            
 95         stxa            %o4, [%o0 + %g2] ASI_B    
 96         stxa            %o4, [%o0 + %g3] ASI_B    
 97         stxa            %o4, [%o0 + %o5] ASI_B    
 98         add             %o0, 0x10, %o0            
 99         stxa            %o4, [%o0 + %g0] ASI_B    
100         stxa            %o4, [%o0 + %g2] ASI_B    
101         stxa            %o4, [%o0 + %g3] ASI_B    
102         stxa            %o4, [%o0 + %o5] ASI_B    
103         bne,pt          %icc, 1b                  
104          add            %o0, 0x30, %o0            
105         ba,a,pt         %icc, .Lpostloop          
106          nop                                      
107         .size           NG4bzero,.-NG4bzero       
                                                      

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