Revision 02e1ec9b

b/exec-all.h
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{
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    int ret;
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    __asm__ __volatile__ (
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                          "0:    lwarx %0,0,%1 ;"
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                          "      xor. %0,%3,%0;"
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                          "      bne 1f;"
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                          "      stwcx. %2,0,%1;"
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                          "      bne- 0b;"
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                          "0:    lwarx %0,0,%1\n"
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                          "      xor. %0,%3,%0\n"
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                          "      bne 1f\n"
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                          "      stwcx. %2,0,%1\n"
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                          "      bne- 0b\n"
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                          "1:    "
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                          : "=&r" (ret)
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                          : "r" (p), "r" (1), "r" (0)

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