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Linux/arch/sparc/lib/ipcsum.S

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Diff markup

Differences between /arch/sparc/lib/ipcsum.S (Version linux-6.12-rc7) and /arch/alpha/lib/ipcsum.S (Version linux-4.17.19)


  1 /* SPDX-License-Identifier: GPL-2.0 */            
  2 #include <linux/export.h>                         
  3 #include <linux/linkage.h>                        
  4                                                   
  5         .text                                     
  6 ENTRY(ip_fast_csum) /* %o0 = iph, %o1 = ihl */    
  7         sub     %o1, 4, %g7                       
  8         lduw    [%o0 + 0x00], %o2                 
  9         lduw    [%o0 + 0x04], %g2                 
 10         lduw    [%o0 + 0x08], %g3                 
 11         addcc   %g2, %o2, %o2                     
 12         lduw    [%o0 + 0x0c], %g2                 
 13         addccc  %g3, %o2, %o2                     
 14         lduw    [%o0 + 0x10], %g3                 
 15                                                   
 16         addccc  %g2, %o2, %o2                     
 17         addc    %o2, %g0, %o2                     
 18 1:      addcc   %g3, %o2, %o2                     
 19         add     %o0, 4, %o0                       
 20         addccc  %o2, %g0, %o2                     
 21         subcc   %g7, 1, %g7                       
 22         be,a,pt %icc, 2f                          
 23          sll    %o2, 16, %g2                      
 24                                                   
 25         lduw    [%o0 + 0x10], %g3                 
 26         ba,pt   %xcc, 1b                          
 27          nop                                      
 28 2:      addcc   %o2, %g2, %g2                     
 29         srl     %g2, 16, %o2                      
 30         addc    %o2, %g0, %o2                     
 31         xnor    %g0, %o2, %o2                     
 32         set     0xffff, %o1                       
 33         retl                                      
 34          and    %o2, %o1, %o0                     
 35 ENDPROC(ip_fast_csum)                             
 36 EXPORT_SYMBOL(ip_fast_csum)                       
                                                      

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