cvs commit: src/sys/i386/i386 in_cksum.c src/sys/i386/include in_cksum.h

Bjoern A. Zeeb bz at
Fri Oct 26 00:15:05 PDT 2007

bz          2007-10-26 07:15:04 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_7)
    sys/i386/i386        in_cksum.c 
    sys/i386/include     in_cksum.h 
  MFC: rev. 1.29 sys/i386/i386/in_cksum.c
       rev. 1.18 sys/i386/include/in_cksum.h
    Fold multiple asm statements into one so that the compiler at a certain
    optimization level (-march=pentium-mmx for example) does not insert
    intermediate ops which would trash the carry.
    Change both sys/i386/i386/in_cksum.c[1] and sys/i386/include/in_cksum.h.
    To my best understanding the same problem was addressed in rev. 1.16
    of src/sys/i386/include/in_cksum.h for just a single function 3y ago.
    Reviewed by:  jhb
    Submitted by: Zhouyi ZHOU <zhouzhouyi> (intial version of [1])
    PR:           115678, 69257
  Approved by:    re (kensmith)
  Revision   Changes    Path  +77 -43    src/sys/i386/i386/in_cksum.c  +14 -7     src/sys/i386/include/in_cksum.h

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