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* sysdeps/alpha/strlen.c (strlen): Fix cmpbge insn, and returning

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of the byte that was zero, so we return a valid number.
This commit is contained in:
Brendan Kehoe 1995-04-17 22:02:01 +00:00
parent 9e1fadd6c6
commit fd1e71567e
1 changed files with 5 additions and 4 deletions
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9
sysdeps/alpha/strlen.c
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@ -36,19 +36,20 @@ strlen (const char *str)
for (;;) for (;;)
{ {
const unsigned long int longword = *longword_ptr++;
int mask; int mask;
asm ("cmpbge %1, %2, %0" : "=r" (mask) : "r" (0), "r" (*longword_ptr++));
/* Set bits in MASK if bytes in LONGWORD are zero. */
asm ("cmpbge $31, %1, %0" : "=r" (mask) : "r" (longword));
if (mask) if (mask)
{ {
/* Which of the bytes was the zero? */ /* Which of the bytes was the zero? */
const char *cp = (const char *) (longword_ptr - 1); const char *cp = (const char *) (longword_ptr - 1);
int i; int i;
for (i = 0; i < 6; i++) for (i = 0; i < 8; i++)
if (cp[i] == 0) if (cp[i] == 0)
return cp - str + i; return cp - str + i;
return cp - str + 7;
} }
} }
} }