1 files changed, 79 insertions, 0 deletions
diff --git a/sysdeps/x86_64/fpu/math_ldbl.h b/sysdeps/x86_64/fpu/math_ldbl.h
new file mode 100644
index 0000000000..b9ff8dadaf
--- /dev/null
+++ b/sysdeps/x86_64/fpu/math_ldbl.h
@@ -0,0 +1,79 @@
+#ifndef _MATH_PRIVATE_H_
+#error "Never use <math_ldbl.h> directly; include <math_private.h> instead."
+#endif
+
+/* A union which permits us to convert between a long double and
+   three 32 bit ints.  */
+
+typedef union
+{
+  long double value;
+  struct
+  {
+    u_int32_t lsw;
+    u_int32_t msw;
+    int sign_exponent:16;
+    unsigned int empty1:16;
+    unsigned int empty0:32;
+  } parts;
+} ieee_long_double_shape_type;
+
+/* Get three 32 bit ints from a double.  */
+
+#define GET_LDOUBLE_WORDS(exp,ix0,ix1,d)			\
+do {								\
+  ieee_long_double_shape_type ew_u;				\
+  ew_u.value = (d);						\
+  (exp) = ew_u.parts.sign_exponent;				\
+  (ix0) = ew_u.parts.msw;					\
+  (ix1) = ew_u.parts.lsw;					\
+} while (0)
+
+/* Set a double from two 32 bit ints.  */
+
+#define SET_LDOUBLE_WORDS(d,exp,ix0,ix1)			\
+do {								\
+  ieee_long_double_shape_type iw_u;				\
+  iw_u.parts.sign_exponent = (exp);				\
+  iw_u.parts.msw = (ix0);					\
+  iw_u.parts.lsw = (ix1);					\
+  (d) = iw_u.value;						\
+} while (0)
+
+/* Get the more significant 32 bits of a long double mantissa.  */
+
+#define GET_LDOUBLE_MSW(v,d)					\
+do {								\
+  ieee_long_double_shape_type sh_u;				\
+  sh_u.value = (d);						\
+  (v) = sh_u.parts.msw;						\
+} while (0)
+
+/* Set the more significant 32 bits of a long double mantissa from an int.  */
+
+#define SET_LDOUBLE_MSW(d,v)					\
+do {								\
+  ieee_long_double_shape_type sh_u;				\
+  sh_u.value = (d);						\
+  sh_u.parts.msw = (v);						\
+  (d) = sh_u.value;						\
+} while (0)
+
+/* Get int from the exponent of a long double.  */
+
+#define GET_LDOUBLE_EXP(exp,d)					\
+do {								\
+  ieee_long_double_shape_type ge_u;				\
+  ge_u.value = (d);						\
+  (exp) = ge_u.parts.sign_exponent;				\
+} while (0)
+
+/* Set exponent of a long double from an int.  */
+
+#define SET_LDOUBLE_EXP(d,exp)					\
+do {								\
+  ieee_long_double_shape_type se_u;				\
+  se_u.value = (d);						\
+  se_u.parts.sign_exponent = (exp);				\
+  (d) = se_u.value;						\
+} while (0)