diff --git a/bits/floatn-common.h b/bits/floatn-common.h
index 1b3ab51..2182c9d 100644
--- a/bits/floatn-common.h
+++ b/bits/floatn-common.h
@@ -71,222 +71,226 @@
 # define __HAVE_FLOATN_NOT_TYPEDEF 0
 #endif
 
+#ifndef __ASSEMBLER__
+
 /* Defined to concatenate the literal suffix to be used with _FloatN
    or _FloatNx types, if __HAVE_<type> is 1.  The corresponding
    literal suffixes exist since GCC 7, for C only.  */
-#if __HAVE_FLOAT16
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+# if __HAVE_FLOAT16
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
 /* No corresponding suffix available for this type.  */
-#  define __f16(x) ((_Float16) x##f)
-# else
-#  define __f16(x) x##f16
+#   define __f16(x) ((_Float16) x##f)
+#  else
+#   define __f16(x) x##f16
+#  endif
 # endif
-#endif
 
-#if __HAVE_FLOAT32
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
-#  define __f32(x) x##f
-# else
-#  define __f32(x) x##f32
+# if __HAVE_FLOAT32
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+#   define __f32(x) x##f
+#  else
+#   define __f32(x) x##f32
+#  endif
 # endif
-#endif
 
-#if __HAVE_FLOAT64
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
-#  define __f64(x) x
-# else
-#  define __f64(x) x##f64
+# if __HAVE_FLOAT64
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+#   define __f64(x) x
+#  else
+#   define __f64(x) x##f64
+#  endif
 # endif
-#endif
 
-#if __HAVE_FLOAT32X
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
-#  define __f32x(x) x
-# else
-#  define __f32x(x) x##f32x
+# if __HAVE_FLOAT32X
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+#   define __f32x(x) x
+#  else
+#   define __f32x(x) x##f32x
+#  endif
 # endif
-#endif
 
-#if __HAVE_FLOAT64X
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
-#  if __HAVE_FLOAT64X_LONG_DOUBLE
-#   define __f64x(x) x##l
+# if __HAVE_FLOAT64X
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+#   if __HAVE_FLOAT64X_LONG_DOUBLE
+#    define __f64x(x) x##l
+#   else
+#    define __f64x(x) __f128 (x)
+#   endif
 #  else
-#   define __f64x(x) __f128 (x)
+#   define __f64x(x) x##f64x
 #  endif
-# else
-#  define __f64x(x) x##f64x
 # endif
-#endif
 
-#if __HAVE_FLOAT128X
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
-#  error "_Float128X supported but no constant suffix"
-# else
-#  define __f128x(x) x##f128x
+# if __HAVE_FLOAT128X
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+#   error "_Float128X supported but no constant suffix"
+#  else
+#   define __f128x(x) x##f128x
+#  endif
 # endif
-#endif
 
 /* Defined to a complex type if __HAVE_<type> is 1.  */
-#if __HAVE_FLOAT16
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+# if __HAVE_FLOAT16
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
 typedef _Complex float __cfloat16 __attribute__ ((__mode__ (__HC__)));
-#  define __CFLOAT16 __cfloat16
-# else
-#  define __CFLOAT16 _Complex _Float16
+#   define __CFLOAT16 __cfloat16
+#  else
+#   define __CFLOAT16 _Complex _Float16
+#  endif
 # endif
-#endif
 
-#if __HAVE_FLOAT32
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
-#  define __CFLOAT32 _Complex float
-# else
-#  define __CFLOAT32 _Complex _Float32
+# if __HAVE_FLOAT32
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+#   define __CFLOAT32 _Complex float
+#  else
+#   define __CFLOAT32 _Complex _Float32
+#  endif
 # endif
-#endif
 
-#if __HAVE_FLOAT64
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
-#  define __CFLOAT64 _Complex double
-# else
-#  define __CFLOAT64 _Complex _Float64
+# if __HAVE_FLOAT64
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+#   define __CFLOAT64 _Complex double
+#  else
+#   define __CFLOAT64 _Complex _Float64
+#  endif
 # endif
-#endif
 
-#if __HAVE_FLOAT32X
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
-#  define __CFLOAT32X _Complex double
-# else
-#  define __CFLOAT32X _Complex _Float32x
+# if __HAVE_FLOAT32X
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+#   define __CFLOAT32X _Complex double
+#  else
+#   define __CFLOAT32X _Complex _Float32x
+#  endif
 # endif
-#endif
 
-#if __HAVE_FLOAT64X
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
-#  if __HAVE_FLOAT64X_LONG_DOUBLE
-#   define __CFLOAT64X _Complex long double
+# if __HAVE_FLOAT64X
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+#   if __HAVE_FLOAT64X_LONG_DOUBLE
+#    define __CFLOAT64X _Complex long double
+#   else
+#    define __CFLOAT64X __CFLOAT128
+#   endif
 #  else
-#   define __CFLOAT64X __CFLOAT128
+#   define __CFLOAT64X _Complex _Float64x
 #  endif
-# else
-#  define __CFLOAT64X _Complex _Float64x
 # endif
-#endif
 
-#if __HAVE_FLOAT128X
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
-#  error "_Float128X supported but no complex type"
-# else
-#  define __CFLOAT128X _Complex _Float128x
+# if __HAVE_FLOAT128X
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+#   error "_Float128X supported but no complex type"
+#  else
+#   define __CFLOAT128X _Complex _Float128x
+#  endif
 # endif
-#endif
 
 /* The remaining of this file provides support for older compilers.  */
-#if __HAVE_FLOAT16
+# if __HAVE_FLOAT16
 
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
 typedef float _Float16 __attribute__ ((__mode__ (__HF__)));
-# endif
+#  endif
 
-# if !__GNUC_PREREQ (7, 0)
-#  define __builtin_huge_valf16() ((_Float16) __builtin_huge_val ())
-#  define __builtin_inff16() ((_Float16) __builtin_inf ())
-#  define __builtin_nanf16(x) ((_Float16) __builtin_nan (x))
-#  define __builtin_nansf16(x) ((_Float16) __builtin_nans (x))
-# endif
+#  if !__GNUC_PREREQ (7, 0)
+#   define __builtin_huge_valf16() ((_Float16) __builtin_huge_val ())
+#   define __builtin_inff16() ((_Float16) __builtin_inf ())
+#   define __builtin_nanf16(x) ((_Float16) __builtin_nan (x))
+#   define __builtin_nansf16(x) ((_Float16) __builtin_nans (x))
+#  endif
 
-#endif
+# endif
 
-#if __HAVE_FLOAT32
+# if __HAVE_FLOAT32
 
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
 typedef float _Float32;
-# endif
+#  endif
 
-# if !__GNUC_PREREQ (7, 0)
-#  define __builtin_huge_valf32() (__builtin_huge_valf ())
-#  define __builtin_inff32() (__builtin_inff ())
-#  define __builtin_nanf32(x) (__builtin_nanf (x))
-#  define __builtin_nansf32(x) (__builtin_nansf (x))
-# endif
+#  if !__GNUC_PREREQ (7, 0)
+#   define __builtin_huge_valf32() (__builtin_huge_valf ())
+#   define __builtin_inff32() (__builtin_inff ())
+#   define __builtin_nanf32(x) (__builtin_nanf (x))
+#   define __builtin_nansf32(x) (__builtin_nansf (x))
+#  endif
 
-#endif
+# endif
 
-#if __HAVE_FLOAT64
+# if __HAVE_FLOAT64
 
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
 typedef double _Float64;
-# endif
+#  endif
 
-# if !__GNUC_PREREQ (7, 0)
-#  define __builtin_huge_valf64() (__builtin_huge_val ())
-#  define __builtin_inff64() (__builtin_inf ())
-#  define __builtin_nanf64(x) (__builtin_nan (x))
-#  define __builtin_nansf64(x) (__builtin_nans (x))
-# endif
+#  if !__GNUC_PREREQ (7, 0)
+#   define __builtin_huge_valf64() (__builtin_huge_val ())
+#   define __builtin_inff64() (__builtin_inf ())
+#   define __builtin_nanf64(x) (__builtin_nan (x))
+#   define __builtin_nansf64(x) (__builtin_nans (x))
+#  endif
 
-#endif
+# endif
 
-#if __HAVE_FLOAT32X
+# if __HAVE_FLOAT32X
 
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
 typedef double _Float32x;
-# endif
+#  endif
 
-# if !__GNUC_PREREQ (7, 0)
-#  define __builtin_huge_valf32x() (__builtin_huge_val ())
-#  define __builtin_inff32x() (__builtin_inf ())
-#  define __builtin_nanf32x(x) (__builtin_nan (x))
-#  define __builtin_nansf32x(x) (__builtin_nans (x))
-# endif
+#  if !__GNUC_PREREQ (7, 0)
+#   define __builtin_huge_valf32x() (__builtin_huge_val ())
+#   define __builtin_inff32x() (__builtin_inf ())
+#   define __builtin_nanf32x(x) (__builtin_nan (x))
+#   define __builtin_nansf32x(x) (__builtin_nans (x))
+#  endif
 
-#endif
+# endif
 
-#if __HAVE_FLOAT64X
+# if __HAVE_FLOAT64X
 
-# if __HAVE_FLOAT64X_LONG_DOUBLE
+#  if __HAVE_FLOAT64X_LONG_DOUBLE
 
-#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+#   if !__GNUC_PREREQ (7, 0) || defined __cplusplus
 typedef long double _Float64x;
-#  endif
+#   endif
 
-#  if !__GNUC_PREREQ (7, 0)
-#   define __builtin_huge_valf64x() (__builtin_huge_vall ())
-#   define __builtin_inff64x() (__builtin_infl ())
-#   define __builtin_nanf64x(x) (__builtin_nanl (x))
-#   define __builtin_nansf64x(x) (__builtin_nansl (x))
-#  endif
+#   if !__GNUC_PREREQ (7, 0)
+#    define __builtin_huge_valf64x() (__builtin_huge_vall ())
+#    define __builtin_inff64x() (__builtin_infl ())
+#    define __builtin_nanf64x(x) (__builtin_nanl (x))
+#    define __builtin_nansf64x(x) (__builtin_nansl (x))
+#   endif
 
-# else
+#  else
 
-#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+#   if !__GNUC_PREREQ (7, 0) || defined __cplusplus
 typedef _Float128 _Float64x;
-#  endif
+#   endif
+
+#   if !__GNUC_PREREQ (7, 0)
+#    define __builtin_huge_valf64x() (__builtin_huge_valf128 ())
+#    define __builtin_inff64x() (__builtin_inff128 ())
+#    define __builtin_nanf64x(x) (__builtin_nanf128 (x))
+#    define __builtin_nansf64x(x) (__builtin_nansf128 (x))
+#   endif
 
-#  if !__GNUC_PREREQ (7, 0)
-#   define __builtin_huge_valf64x() (__builtin_huge_valf128 ())
-#   define __builtin_inff64x() (__builtin_inff128 ())
-#   define __builtin_nanf64x(x) (__builtin_nanf128 (x))
-#   define __builtin_nansf64x(x) (__builtin_nansf128 (x))
 #  endif
 
 # endif
 
-#endif
+# if __HAVE_FLOAT128X
 
-#if __HAVE_FLOAT128X
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+#   error "_Float128x supported but no type"
+#  endif
 
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
-#  error "_Float128x supported but no type"
-# endif
+#  if !__GNUC_PREREQ (7, 0)
+#   define __builtin_huge_valf128x() ((_Float128x) __builtin_huge_val ())
+#   define __builtin_inff128x() ((_Float128x) __builtin_inf ())
+#   define __builtin_nanf128x(x) ((_Float128x) __builtin_nan (x))
+#   define __builtin_nansf128x(x) ((_Float128x) __builtin_nans (x))
+#  endif
 
-# if !__GNUC_PREREQ (7, 0)
-#  define __builtin_huge_valf128x() ((_Float128x) __builtin_huge_val ())
-#  define __builtin_inff128x() ((_Float128x) __builtin_inf ())
-#  define __builtin_nanf128x(x) ((_Float128x) __builtin_nan (x))
-#  define __builtin_nansf128x(x) ((_Float128x) __builtin_nans (x))
 # endif
 
-#endif
+#endif /* !__ASSEMBLER__.  */
 
 #endif /* _BITS_FLOATN_COMMON_H */
diff --git a/bits/floatn.h b/bits/floatn.h
index 78eb0f4..dc0cf93 100644
--- a/bits/floatn.h
+++ b/bits/floatn.h
@@ -25,13 +25,17 @@
    from the default float, double and long double types in this glibc.  */
 #define __HAVE_DISTINCT_FLOAT128 0
 
+#ifndef __ASSEMBLER__
+
 /* Defined to concatenate the literal suffix to be used with _Float128
    types, if __HAVE_FLOAT128 is 1.
    E.g.: #define __f128(x) x##f128.  */
-#undef __f128
+# undef __f128
 
 /* Defined to a complex binary128 type if __HAVE_FLOAT128 is 1.
    E.g.: #define __CFLOAT128 _Complex _Float128.  */
-#undef __CFLOAT128
+# undef __CFLOAT128
+
+#endif /* !__ASSEMBLER__.  */
 
 #include <bits/floatn-common.h>
diff --git a/sysdeps/ia64/bits/floatn.h b/sysdeps/ia64/bits/floatn.h
index a88d0f9..d0aeb3f 100644
--- a/sysdeps/ia64/bits/floatn.h
+++ b/sysdeps/ia64/bits/floatn.h
@@ -40,64 +40,68 @@
 # define __HAVE_DISTINCT_FLOAT128 0
 #endif
 
+#ifndef __ASSEMBLER__
+
 /* Defined to concatenate the literal suffix to be used with _Float128
    types, if __HAVE_FLOAT128 is 1. */
-#if __HAVE_FLOAT128
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+# if __HAVE_FLOAT128
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
 /* The literal suffix f128 exists only since GCC 7.0.  */
-#  define __f128(x) x##q
-# else
-#  define __f128(x) x##f128
+#   define __f128(x) x##q
+#  else
+#   define __f128(x) x##f128
+#  endif
 # endif
-#endif
 
 /* Defined to a complex binary128 type if __HAVE_FLOAT128 is 1.  */
-#if __HAVE_FLOAT128
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+# if __HAVE_FLOAT128
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
 /* Add a typedef for older GCC compilers which don't natively support
    _Complex _Float128.  */
 typedef _Complex float __cfloat128 __attribute__ ((__mode__ (__TC__)));
-#  define __CFLOAT128 __cfloat128
-# else
-#  define __CFLOAT128 _Complex _Float128
+#   define __CFLOAT128 __cfloat128
+#  else
+#   define __CFLOAT128 _Complex _Float128
+#  endif
 # endif
-#endif
 
 /* The remaining of this file provides support for older compilers.  */
-#if __HAVE_FLOAT128
+# if __HAVE_FLOAT128
 
 /* The type _Float128 exists only since GCC 7.0.  */
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
 typedef __float128 _Float128;
-# endif
+#  endif
 
 /* __builtin_huge_valf128 doesn't exist before GCC 7.0.  */
-# if !__GNUC_PREREQ (7, 0)
-#  define __builtin_huge_valf128() ((_Float128) __builtin_huge_val ())
-# endif
+#  if !__GNUC_PREREQ (7, 0)
+#   define __builtin_huge_valf128() ((_Float128) __builtin_huge_val ())
+#  endif
 
 /* Older GCC has only a subset of built-in functions for _Float128 on
    ia64, and __builtin_infq is not usable in static initializers.
    Converting a narrower sNaN to _Float128 produces a quiet NaN, so
    attempts to use _Float128 sNaNs will not work properly with older
    compilers.  */
-# if !__GNUC_PREREQ (7, 0)
-#  define __builtin_copysignf128 __builtin_copysignq
-#  define __builtin_fabsf128 __builtin_fabsq
-#  define __builtin_inff128() ((_Float128) __builtin_inf ())
-#  define __builtin_nanf128(x) ((_Float128) __builtin_nan (x))
-#  define __builtin_nansf128(x) ((_Float128) __builtin_nans (x))
-# endif
+#  if !__GNUC_PREREQ (7, 0)
+#   define __builtin_copysignf128 __builtin_copysignq
+#   define __builtin_fabsf128 __builtin_fabsq
+#   define __builtin_inff128() ((_Float128) __builtin_inf ())
+#   define __builtin_nanf128(x) ((_Float128) __builtin_nan (x))
+#   define __builtin_nansf128(x) ((_Float128) __builtin_nans (x))
+#  endif
 
 /* In math/math.h, __MATH_TG will expand signbit to __builtin_signbit*,
    e.g.: __builtin_signbitf128, before GCC 6.  However, there has never
    been a __builtin_signbitf128 in GCC and the type-generic builtin is
    only available since GCC 6.  */
-# if !__GNUC_PREREQ (6, 0)
-#  define __builtin_signbitf128 __signbitf128
+#  if !__GNUC_PREREQ (6, 0)
+#   define __builtin_signbitf128 __signbitf128
+#  endif
+
 # endif
 
-#endif
+#endif /* !__ASSEMBLER__.  */
 
 #include <bits/floatn-common.h>
 
diff --git a/sysdeps/ieee754/ldbl-128/bits/floatn.h b/sysdeps/ieee754/ldbl-128/bits/floatn.h
index eab72cf..01009f0 100644
--- a/sysdeps/ieee754/ldbl-128/bits/floatn.h
+++ b/sysdeps/ieee754/ldbl-128/bits/floatn.h
@@ -39,43 +39,47 @@
    from the default float, double and long double types in this glibc.  */
 #define __HAVE_DISTINCT_FLOAT128 0
 
+#ifndef __ASSEMBLER__
+
 /* Defined to concatenate the literal suffix to be used with _Float128
    types, if __HAVE_FLOAT128 is 1. */
-#if __HAVE_FLOAT128
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+# if __HAVE_FLOAT128
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
 /* The literal suffix f128 exists only since GCC 7.0.  */
-#  define __f128(x) x##l
-# else
-#  define __f128(x) x##f128
+#   define __f128(x) x##l
+#  else
+#   define __f128(x) x##f128
+#  endif
 # endif
-#endif
 
 /* Defined to a complex binary128 type if __HAVE_FLOAT128 is 1.  */
-#if __HAVE_FLOAT128
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
-#  define __CFLOAT128 _Complex long double
-# else
-#  define __CFLOAT128 _Complex _Float128
+# if __HAVE_FLOAT128
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+#   define __CFLOAT128 _Complex long double
+#  else
+#   define __CFLOAT128 _Complex _Float128
+#  endif
 # endif
-#endif
 
 /* The remaining of this file provides support for older compilers.  */
-#if __HAVE_FLOAT128
+# if __HAVE_FLOAT128
 
 /* The type _Float128 exists only since GCC 7.0.  */
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
 typedef long double _Float128;
-# endif
+#  endif
 
 /* Various built-in functions do not exist before GCC 7.0.  */
-# if !__GNUC_PREREQ (7, 0)
-#  define __builtin_huge_valf128() (__builtin_huge_vall ())
-#  define __builtin_inff128() (__builtin_infl ())
-#  define __builtin_nanf128(x) (__builtin_nanl (x))
-#  define __builtin_nansf128(x) (__builtin_nansl (x))
+#  if !__GNUC_PREREQ (7, 0)
+#   define __builtin_huge_valf128() (__builtin_huge_vall ())
+#   define __builtin_inff128() (__builtin_infl ())
+#   define __builtin_nanf128(x) (__builtin_nanl (x))
+#   define __builtin_nansf128(x) (__builtin_nansl (x))
+#  endif
+
 # endif
 
-#endif
+#endif /* !__ASSEMBLER__.  */
 
 #include <bits/floatn-common.h>
 
diff --git a/sysdeps/mips/ieee754/bits/floatn.h b/sysdeps/mips/ieee754/bits/floatn.h
index 957343d..4131991 100644
--- a/sysdeps/mips/ieee754/bits/floatn.h
+++ b/sysdeps/mips/ieee754/bits/floatn.h
@@ -39,43 +39,47 @@
    from the default float, double and long double types in this glibc.  */
 #define __HAVE_DISTINCT_FLOAT128 0
 
+#ifndef __ASSEMBLER__
+
 /* Defined to concatenate the literal suffix to be used with _Float128
    types, if __HAVE_FLOAT128 is 1. */
-#if __HAVE_FLOAT128
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+# if __HAVE_FLOAT128
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
 /* The literal suffix f128 exists only since GCC 7.0.  */
-#  define __f128(x) x##l
-# else
-#  define __f128(x) x##f128
+#   define __f128(x) x##l
+#  else
+#   define __f128(x) x##f128
+#  endif
 # endif
-#endif
 
 /* Defined to a complex binary128 type if __HAVE_FLOAT128 is 1.  */
-#if __HAVE_FLOAT128
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
-#  define __CFLOAT128 _Complex long double
-# else
-#  define __CFLOAT128 _Complex _Float128
+# if __HAVE_FLOAT128
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+#   define __CFLOAT128 _Complex long double
+#  else
+#   define __CFLOAT128 _Complex _Float128
+#  endif
 # endif
-#endif
 
 /* The remaining of this file provides support for older compilers.  */
-#if __HAVE_FLOAT128
+# if __HAVE_FLOAT128
 
 /* The type _Float128 exists only since GCC 7.0.  */
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
 typedef long double _Float128;
-# endif
+#  endif
 
 /* Various built-in functions do not exist before GCC 7.0.  */
-# if !__GNUC_PREREQ (7, 0)
-#  define __builtin_huge_valf128() (__builtin_huge_vall ())
-#  define __builtin_inff128() (__builtin_infl ())
-#  define __builtin_nanf128(x) (__builtin_nanl (x))
-#  define __builtin_nansf128(x) (__builtin_nansl (x))
+#  if !__GNUC_PREREQ (7, 0)
+#   define __builtin_huge_valf128() (__builtin_huge_vall ())
+#   define __builtin_inff128() (__builtin_infl ())
+#   define __builtin_nanf128(x) (__builtin_nanl (x))
+#   define __builtin_nansf128(x) (__builtin_nansl (x))
+#  endif
+
 # endif
 
-#endif
+#endif /* !__ASSEMBLER__.  */
 
 #include <bits/floatn-common.h>
 
diff --git a/sysdeps/powerpc/bits/floatn.h b/sysdeps/powerpc/bits/floatn.h
index a293bfc..09a1c30 100644
--- a/sysdeps/powerpc/bits/floatn.h
+++ b/sysdeps/powerpc/bits/floatn.h
@@ -40,63 +40,67 @@
 # define __HAVE_DISTINCT_FLOAT128 0
 #endif
 
+#ifndef __ASSEMBLER__
+
 /* Defined to concatenate the literal suffix to be used with _Float128
    types, if __HAVE_FLOAT128 is 1. */
-#if __HAVE_FLOAT128
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+# if __HAVE_FLOAT128
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
 /* The literal suffix (f128) exist for powerpc only since GCC 7.0.  */
-#  define __f128(x) x##q
-# else
-#  define __f128(x) x##f128
+#   define __f128(x) x##q
+#  else
+#   define __f128(x) x##f128
+#  endif
 # endif
-#endif
 
 /* Defined to a complex binary128 type if __HAVE_FLOAT128 is 1.  */
-#if __HAVE_FLOAT128
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+# if __HAVE_FLOAT128
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
 /* Add a typedef for older GCC compilers which don't natively support
    _Complex _Float128.  */
 typedef _Complex float __cfloat128 __attribute__ ((__mode__ (__KC__)));
-#  define __CFLOAT128 __cfloat128
-# else
-#  define __CFLOAT128 _Complex _Float128
+#   define __CFLOAT128 __cfloat128
+#  else
+#   define __CFLOAT128 _Complex _Float128
+#  endif
 # endif
-#endif
 
 /* The remaining of this file provides support for older compilers.  */
-#if __HAVE_FLOAT128
+# if __HAVE_FLOAT128
 
 /* The type _Float128 exist for powerpc only since GCC 7.0.  */
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
 typedef __float128 _Float128;
-# endif
+#  endif
 
 /* Builtin __builtin_huge_valf128 doesn't exist before GCC 7.0.  */
-# if !__GNUC_PREREQ (7, 0)
-#  define __builtin_huge_valf128() ((_Float128) __builtin_huge_val ())
-# endif
+#  if !__GNUC_PREREQ (7, 0)
+#   define __builtin_huge_valf128() ((_Float128) __builtin_huge_val ())
+#  endif
 
 /* The following builtins (suffixed with 'q') are available in GCC >= 6.2,
    which is the minimum version required for float128 support on powerpc64le.
    Since GCC 7.0 the builtins suffixed with f128 are also available, then
    there is no need to redefined them.  */
-# if !__GNUC_PREREQ (7, 0)
-#  define __builtin_copysignf128 __builtin_copysignq
-#  define __builtin_fabsf128 __builtin_fabsq
-#  define __builtin_inff128 __builtin_infq
-#  define __builtin_nanf128 __builtin_nanq
-#  define __builtin_nansf128 __builtin_nansq
-# endif
+#  if !__GNUC_PREREQ (7, 0)
+#   define __builtin_copysignf128 __builtin_copysignq
+#   define __builtin_fabsf128 __builtin_fabsq
+#   define __builtin_inff128 __builtin_infq
+#   define __builtin_nanf128 __builtin_nanq
+#   define __builtin_nansf128 __builtin_nansq
+#  endif
 
 /* In math/math.h, __MATH_TG will expand signbit to __builtin_signbit*,
    e.g.: __builtin_signbitf128, before GCC 6.  However, there has never
    been a __builtin_signbitf128 in GCC and the type-generic builtin is
    only available since GCC 6.  */
-# if !__GNUC_PREREQ (6, 0)
-#  define __builtin_signbitf128 __signbitf128
+#  if !__GNUC_PREREQ (6, 0)
+#   define __builtin_signbitf128 __signbitf128
+#  endif
+
 # endif
 
-#endif
+#endif /* !__ASSEMBLER__.  */
 
 #include <bits/floatn-common.h>
 
diff --git a/sysdeps/x86/bits/floatn.h b/sysdeps/x86/bits/floatn.h
index 5a21fd4..5ca6bba 100644
--- a/sysdeps/x86/bits/floatn.h
+++ b/sysdeps/x86/bits/floatn.h
@@ -42,64 +42,68 @@
 # define __HAVE_DISTINCT_FLOAT128 0
 #endif
 
+#ifndef __ASSEMBLER__
+
 /* Defined to concatenate the literal suffix to be used with _Float128
    types, if __HAVE_FLOAT128 is 1. */
-#if __HAVE_FLOAT128
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+# if __HAVE_FLOAT128
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
 /* The literal suffix f128 exists only since GCC 7.0.  */
-#  define __f128(x) x##q
-# else
-#  define __f128(x) x##f128
+#   define __f128(x) x##q
+#  else
+#   define __f128(x) x##f128
+#  endif
 # endif
-#endif
 
 /* Defined to a complex binary128 type if __HAVE_FLOAT128 is 1.  */
-#if __HAVE_FLOAT128
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+# if __HAVE_FLOAT128
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
 /* Add a typedef for older GCC compilers which don't natively support
    _Complex _Float128.  */
 typedef _Complex float __cfloat128 __attribute__ ((__mode__ (__TC__)));
-#  define __CFLOAT128 __cfloat128
-# else
-#  define __CFLOAT128 _Complex _Float128
+#   define __CFLOAT128 __cfloat128
+#  else
+#   define __CFLOAT128 _Complex _Float128
+#  endif
 # endif
-#endif
 
 /* The remaining of this file provides support for older compilers.  */
-#if __HAVE_FLOAT128
+# if __HAVE_FLOAT128
 
 /* The type _Float128 exists only since GCC 7.0.  */
-# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
+#  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
 typedef __float128 _Float128;
-# endif
+#  endif
 
 /* __builtin_huge_valf128 doesn't exist before GCC 7.0.  */
-# if !__GNUC_PREREQ (7, 0)
-#  define __builtin_huge_valf128() ((_Float128) __builtin_huge_val ())
-# endif
+#  if !__GNUC_PREREQ (7, 0)
+#   define __builtin_huge_valf128() ((_Float128) __builtin_huge_val ())
+#  endif
 
 /* Older GCC has only a subset of built-in functions for _Float128 on
    x86, and __builtin_infq is not usable in static initializers.
    Converting a narrower sNaN to _Float128 produces a quiet NaN, so
    attempts to use _Float128 sNaNs will not work properly with older
    compilers.  */
-# if !__GNUC_PREREQ (7, 0)
-#  define __builtin_copysignf128 __builtin_copysignq
-#  define __builtin_fabsf128 __builtin_fabsq
-#  define __builtin_inff128() ((_Float128) __builtin_inf ())
-#  define __builtin_nanf128(x) ((_Float128) __builtin_nan (x))
-#  define __builtin_nansf128(x) ((_Float128) __builtin_nans (x))
-# endif
+#  if !__GNUC_PREREQ (7, 0)
+#   define __builtin_copysignf128 __builtin_copysignq
+#   define __builtin_fabsf128 __builtin_fabsq
+#   define __builtin_inff128() ((_Float128) __builtin_inf ())
+#   define __builtin_nanf128(x) ((_Float128) __builtin_nan (x))
+#   define __builtin_nansf128(x) ((_Float128) __builtin_nans (x))
+#  endif
 
 /* In math/math.h, __MATH_TG will expand signbit to __builtin_signbit*,
    e.g.: __builtin_signbitf128, before GCC 6.  However, there has never
    been a __builtin_signbitf128 in GCC and the type-generic builtin is
    only available since GCC 6.  */
-# if !__GNUC_PREREQ (6, 0)
-#  define __builtin_signbitf128 __signbitf128
+#  if !__GNUC_PREREQ (6, 0)
+#   define __builtin_signbitf128 __signbitf128
+#  endif
+
 # endif
 
-#endif
+#endif /* !__ASSEMBLER__.  */
 
 #include <bits/floatn-common.h>
 
