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#define rSTR2 r4 /* second string arg */
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#define rN r5 /* max string length */
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/* Note: The Bounded pointer support in this code is broken. This code
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Current PPC gcc does not support -fbounds-check or -fbounded-pointers. */
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#define rWORD1 r6 /* current word in s1 */
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#define rWORD2 r7 /* current word in s2 */