1 files changed, 23 insertions, 0 deletions
diff --git a/include/math.h b/include/math.h
index e21d34b868..9ab7aa4403 100644
--- a/include/math.h
+++ b/include/math.h
@@ -54,6 +54,29 @@ libm_hidden_proto (__expf128)
 libm_hidden_proto (__expm1f128)
 # endif
 
+# if __HAVE_DISTINCT_FLOAT128
+
+/* __builtin_isinf_sign is broken in GCC < 7 for float128.  */
+#  if ! __GNUC_PREREQ (7, 0)
+#   include <ieee754_float128.h>
+extern inline int
+__isinff128 (_Float128 x)
+{
+  int64_t hx, lx;
+  GET_FLOAT128_WORDS64 (hx, lx, x);
+  lx |= (hx & 0x7fffffffffffffffLL) ^ 0x7fff000000000000LL;
+  lx |= -lx;
+  return ~(lx >> 63) & (hx >> 62);
+}
+#  endif
+
+extern inline _Float128
+fabsf128 (_Float128 x)
+{
+  return __builtin_fabsf128 (x);
+}
+# endif
+
 # if !(defined __FINITE_MATH_ONLY__ && __FINITE_MATH_ONLY__ > 0)
 #  ifndef NO_MATH_REDIRECT
 /* Declare sqrt for use within GLIBC.  Compilers typically inline sqrt as a