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msun: swap words order instead of bits order on BIG ENDIAN

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The "for" loop on big endian was inverting all the bits instead of
just the words

Issue reported by TestSuite (msun lib nan_test case)

Submitted by:	Renato Riolino <renato.riolino@eldorado.org.br>
Submitted by:	Fernando Valle <fernando.valle@eldorado.org.br>
Reviewed by:	pfg, alfredo
Approved by:	jhibbits (mentor)
Sponsored by:	Eldorado Research Institute (eldorado.org.br)
Differential Revision:	https://reviews.freebsd.org/D23926
This commit is contained in:
Alfredo Dal'Ava Junior 2020-03-26 18:50:54 +00:00
parent 68fbe6f0b3
commit f1343c7f67
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=359342
1 changed files with 5 additions and 4 deletions
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9
lib/msun/src/s_nan.c
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@ -66,14 +66,15 @@ _scan_nan(uint32_t *words, int num_words, const char *s)
;
/* Scan backwards, filling in the bits in words[] as we go. */
#if _BYTE_ORDER == _LITTLE_ENDIAN
for (bitpos = 0; bitpos < 32 * num_words; bitpos += 4) {
#else
for (bitpos = 32 * num_words - 4; bitpos >= 0; bitpos -= 4) {
#endif
if (--si < 0)
break;
#if _BYTE_ORDER == _LITTLE_ENDIAN
words[bitpos / 32] |= digittoint(s[si]) << (bitpos % 32);
#else
words[num_words - 1 - bitpos / 32] |=
digittoint(s[si]) << (bitpos % 32);
#endif
}
}