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lex.c (search_line_fast): Correct for little endian.

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2013-11-18  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	* lex.c (search_line_fast): Correct for little endian.

From-SVN: r204970
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Bill Schmidt 2013-11-18 16:21:42 +00:00 • committed by William Schmidt
parent ddf05af2ff
commit aadce58599
2 changed files with 13 additions and 0 deletions
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4
libcpp/ChangeLog
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@ -1,3 +1,7 @@
2013-11-18 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
* lex.c (search_line_fast): Correct for little endian.
2013-11-15 Joseph Myers <joseph@codesourcery.com>
* ucnid.tab: Add C11 and C11NOSTART data.

9
libcpp/lex.c
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@ -559,8 +559,13 @@ search_line_fast (const uchar *s, const uchar *end ATTRIBUTE_UNUSED)
beginning with all ones and shifting in zeros according to the
mis-alignment. The LVSR instruction pulls the exact shift we
want from the address. */
#ifdef __BIG_ENDIAN__
mask = __builtin_vec_lvsr(0, s);
mask = __builtin_vec_perm(zero, ones, mask);
#else
mask = __builtin_vec_lvsl(0, s);
mask = __builtin_vec_perm(ones, zero, mask);
#endif
data &= mask;
/* While altivec loads mask addresses, we still need to align S so
@ -624,7 +629,11 @@ search_line_fast (const uchar *s, const uchar *end ATTRIBUTE_UNUSED)
/* L now contains 0xff in bytes for which we matched one of the
relevant characters. We can find the byte index by finding
its bit index and dividing by 8. */
#ifdef __BIG_ENDIAN__
l = __builtin_clzl(l) >> 3;
#else
l = __builtin_ctzl(l) >> 3;
#endif
return s + l;
#undef N