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-rw-r--r--libquadmath/math/isinfq.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/libquadmath/math/isinfq.c b/libquadmath/math/isinfq.c
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+++ b/libquadmath/math/isinfq.c
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+/*
+ * Written by J.T. Conklin <jtc@netbsd.org>.
+ * Change for long double by Jakub Jelinek <jj@ultra.linux.cz>
+ * Public domain.
+ */
+
+#include "quadmath-imp.h"
+
+int
+isinfq (__float128 x)
+{
+ int64_t hx,lx;
+ GET_FLT128_WORDS64(hx,lx,x);
+ lx |= (hx & 0x7fffffffffffffffLL) ^ 0x7fff000000000000LL;
+ lx |= -lx;
+ return ~(lx >> 63) & (hx >> 62);
+}