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D44433.diff
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diff --git a/lib/msun/src/s_fma.c b/lib/msun/src/s_fma.c
--- a/lib/msun/src/s_fma.c
+++ b/lib/msun/src/s_fma.c
@@ -267,7 +267,9 @@
*/
fesetround(oround);
volatile double vzs = zs; /* XXX gcc CSE bug workaround */
- return (xy.hi + vzs + ldexp(xy.lo, spread));
+ xs = ldexp(xy.lo, spread);
+ xy.hi += vzs;
+ return (xy.hi == 0 ? xs : xy.hi + xs);
}
if (oround != FE_TONEAREST) {
diff --git a/lib/msun/src/s_fmal.c b/lib/msun/src/s_fmal.c
--- a/lib/msun/src/s_fmal.c
+++ b/lib/msun/src/s_fmal.c
@@ -248,7 +248,9 @@
*/
fesetround(oround);
volatile long double vzs = zs; /* XXX gcc CSE bug workaround */
- return (xy.hi + vzs + ldexpl(xy.lo, spread));
+ xs = ldexpl(xy.lo, spread);
+ xy.hi += vzs;
+ return (xy.hi == 0 ? xs : xy.hi + xs);
}
if (oround != FE_TONEAREST) {
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D44433.diff (808 B)
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D44433: fma: correct zero sign with small inputs
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