Author: eadler
Date: Mon Jun 24 19:12:17 2013
New Revision: 252170
URL: http://svnweb.freebsd.org/changeset/base/252170
Log:
Make the order of operations for lib/msun more clear.
Tested with md5 sum of object code
Reported by: swild...@dragonflybsd.org
Submitted by: bde
Modified:
head/lib/msun/src/s_fma.c
head/lib/msun/src/s_fmal.c
Modified: head/lib/msun/src/s_fma.c
==============================================================================
--- head/lib/msun/src/s_fma.c Mon Jun 24 18:41:28 2013 (r252169)
+++ head/lib/msun/src/s_fma.c Mon Jun 24 19:12:17 2013 (r252170)
@@ -117,7 +117,7 @@ add_and_denormalize(double a, double b,
if (sum.lo != 0) {
EXTRACT_WORD64(hibits, sum.hi);
bits_lost = -((int)(hibits >> 52) & 0x7ff) - scale + 1;
- if (bits_lost != 1 ^ (int)(hibits & 1)) {
+ if ((bits_lost != 1) ^ (int)(hibits & 1)) {
/* hibits += (int)copysign(1.0, sum.hi * sum.lo) */
EXTRACT_WORD64(lobits, sum.lo);
hibits += 1 - (((hibits ^ lobits) >> 62) & 2);
Modified: head/lib/msun/src/s_fmal.c
==============================================================================
--- head/lib/msun/src/s_fmal.c Mon Jun 24 18:41:28 2013 (r252169)
+++ head/lib/msun/src/s_fmal.c Mon Jun 24 19:12:17 2013 (r252170)
@@ -113,7 +113,7 @@ add_and_denormalize(long double a, long
if (sum.lo != 0) {
u.e = sum.hi;
bits_lost = -u.bits.exp - scale + 1;
- if (bits_lost != 1 ^ (int)(u.bits.manl & 1))
+ if ((bits_lost != 1) ^ (int)(u.bits.manl & 1))
sum.hi = nextafterl(sum.hi, INFINITY * sum.lo);
}
return (ldexp(sum.hi, scale));
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