Add _FloatN, _FloatNx M_* constants.

Continuing the preparation for additional _FloatN / _FloatNx type
support, this patch adds M_* constants for such types.  The decimal
expansions used are all the same as used for _Float128; there's no
need to reduce the precision used.  In the case of _Float128x, #error
is used because the constants would need additional precision, but how
much is needed would depend on the actual _Float128x format used, so
it's not possible to add header support simply as part of code that
handles all _FloatN / _FloatNx types similarly.

Tested for x86_64.

	* math/math.h [__HAVE_FLOAT16 && __USE_GNU] (M_Ef16): New macro.
	[__HAVE_FLOAT16 && __USE_GNU] (M_LOG2Ef16): Likewise.
	[__HAVE_FLOAT16 && __USE_GNU] (M_LOG10Ef16): Likewise.
	[__HAVE_FLOAT16 && __USE_GNU] (M_LN2f16): Likewise.
	[__HAVE_FLOAT16 && __USE_GNU] (M_LN10f16): Likewise.
	[__HAVE_FLOAT16 && __USE_GNU] (M_PIf16): Likewise.
	[__HAVE_FLOAT16 && __USE_GNU] (M_PI_2f16): Likewise.
	[__HAVE_FLOAT16 && __USE_GNU] (M_PI_4f16): Likewise.
	[__HAVE_FLOAT16 && __USE_GNU] (M_1_PIf16): Likewise.
	[__HAVE_FLOAT16 && __USE_GNU] (M_2_PIf16): Likewise.
	[__HAVE_FLOAT16 && __USE_GNU] (M_2_SQRTPIf16): Likewise.
	[__HAVE_FLOAT16 && __USE_GNU] (M_SQRT2f16): Likewise.
	[__HAVE_FLOAT16 && __USE_GNU] (M_SQRT1_2f16): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_Ef32): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_LOG2Ef32): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_LOG10Ef32): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_LN2f32): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_LN10f32): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_PIf32): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_PI_2f32): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_PI_4f32): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_1_PIf32): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_2_PIf32): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_2_SQRTPIf32): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_SQRT2f32): Likewise.
	[__HAVE_FLOAT32 && __USE_GNU] (M_SQRT1_2f32): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_Ef64): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_LOG2Ef64): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_LOG10Ef64): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_LN2f64): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_LN10f64): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_PIf64): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_PI_2f64): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_PI_4f64): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_1_PIf64): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_2_PIf64): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_2_SQRTPIf64): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_SQRT2f64): Likewise.
	[__HAVE_FLOAT64 && __USE_GNU] (M_SQRT1_2f64): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_Ef32x): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_LOG2Ef32x): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_LOG10Ef32x): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_LN2f32x): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_LN10f32x): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_PIf32x): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_PI_2f32x): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_PI_4f32x): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_1_PIf32x): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_2_PIf32x): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_2_SQRTPIf32x): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_SQRT2f32x): Likewise.
	[__HAVE_FLOAT32X && __USE_GNU] (M_SQRT1_2f32x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_Ef64x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_LOG2Ef64x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_LOG10Ef64x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_LN2f64x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_LN10f64x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_PIf64x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_PI_2f64x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_PI_4f64x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_1_PIf64x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_2_PIf64x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_2_SQRTPIf64x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_SQRT2f64x): Likewise.
	[__HAVE_FLOAT64X && __USE_GNU] (M_SQRT1_2f64x): Likewise.
	[__HAVE_FLOAT128X && __USE_GNU]: Use #error.

1 files changed, 84 insertions, 0 deletions

diff --git a/math/math.h b/math/math.h
index 326304202a..5683ac96fe 100644
--- a/math/math.h
+++ b/math/math.h
@@ -794,6 +794,54 @@ iszero (__T __val)
 # define M_SQRT1_2l	0.707106781186547524400844362104849039L /* 1/sqrt(2) */
 #endif
 
+#if __HAVE_FLOAT16 && defined __USE_GNU
+# define M_Ef16		__f16 (2.718281828459045235360287471352662498) /* e */
+# define M_LOG2Ef16	__f16 (1.442695040888963407359924681001892137) /* log_2 e */
+# define M_LOG10Ef16	__f16 (0.434294481903251827651128918916605082) /* log_10 e */
+# define M_LN2f16	__f16 (0.693147180559945309417232121458176568) /* log_e 2 */
+# define M_LN10f16	__f16 (2.302585092994045684017991454684364208) /* log_e 10 */
+# define M_PIf16	__f16 (3.141592653589793238462643383279502884) /* pi */
+# define M_PI_2f16	__f16 (1.570796326794896619231321691639751442) /* pi/2 */
+# define M_PI_4f16	__f16 (0.785398163397448309615660845819875721) /* pi/4 */
+# define M_1_PIf16	__f16 (0.318309886183790671537767526745028724) /* 1/pi */
+# define M_2_PIf16	__f16 (0.636619772367581343075535053490057448) /* 2/pi */
+# define M_2_SQRTPIf16	__f16 (1.128379167095512573896158903121545172) /* 2/sqrt(pi) */
+# define M_SQRT2f16	__f16 (1.414213562373095048801688724209698079) /* sqrt(2) */
+# define M_SQRT1_2f16	__f16 (0.707106781186547524400844362104849039) /* 1/sqrt(2) */
+#endif
+
+#if __HAVE_FLOAT32 && defined __USE_GNU
+# define M_Ef32		__f32 (2.718281828459045235360287471352662498) /* e */
+# define M_LOG2Ef32	__f32 (1.442695040888963407359924681001892137) /* log_2 e */
+# define M_LOG10Ef32	__f32 (0.434294481903251827651128918916605082) /* log_10 e */
+# define M_LN2f32	__f32 (0.693147180559945309417232121458176568) /* log_e 2 */
+# define M_LN10f32	__f32 (2.302585092994045684017991454684364208) /* log_e 10 */
+# define M_PIf32	__f32 (3.141592653589793238462643383279502884) /* pi */
+# define M_PI_2f32	__f32 (1.570796326794896619231321691639751442) /* pi/2 */
+# define M_PI_4f32	__f32 (0.785398163397448309615660845819875721) /* pi/4 */
+# define M_1_PIf32	__f32 (0.318309886183790671537767526745028724) /* 1/pi */
+# define M_2_PIf32	__f32 (0.636619772367581343075535053490057448) /* 2/pi */
+# define M_2_SQRTPIf32	__f32 (1.128379167095512573896158903121545172) /* 2/sqrt(pi) */
+# define M_SQRT2f32	__f32 (1.414213562373095048801688724209698079) /* sqrt(2) */
+# define M_SQRT1_2f32	__f32 (0.707106781186547524400844362104849039) /* 1/sqrt(2) */
+#endif
+
+#if __HAVE_FLOAT64 && defined __USE_GNU
+# define M_Ef64		__f64 (2.718281828459045235360287471352662498) /* e */
+# define M_LOG2Ef64	__f64 (1.442695040888963407359924681001892137) /* log_2 e */
+# define M_LOG10Ef64	__f64 (0.434294481903251827651128918916605082) /* log_10 e */
+# define M_LN2f64	__f64 (0.693147180559945309417232121458176568) /* log_e 2 */
+# define M_LN10f64	__f64 (2.302585092994045684017991454684364208) /* log_e 10 */
+# define M_PIf64	__f64 (3.141592653589793238462643383279502884) /* pi */
+# define M_PI_2f64	__f64 (1.570796326794896619231321691639751442) /* pi/2 */
+# define M_PI_4f64	__f64 (0.785398163397448309615660845819875721) /* pi/4 */
+# define M_1_PIf64	__f64 (0.318309886183790671537767526745028724) /* 1/pi */
+# define M_2_PIf64	__f64 (0.636619772367581343075535053490057448) /* 2/pi */
+# define M_2_SQRTPIf64	__f64 (1.128379167095512573896158903121545172) /* 2/sqrt(pi) */
+# define M_SQRT2f64	__f64 (1.414213562373095048801688724209698079) /* sqrt(2) */
+# define M_SQRT1_2f64	__f64 (0.707106781186547524400844362104849039) /* 1/sqrt(2) */
+#endif
+
 #if __HAVE_FLOAT128 && defined __USE_GNU
 # define M_Ef128	__f128 (2.718281828459045235360287471352662498) /* e */
 # define M_LOG2Ef128	__f128 (1.442695040888963407359924681001892137) /* log_2 e */
@@ -810,6 +858,42 @@ iszero (__T __val)
 # define M_SQRT1_2f128	__f128 (0.707106781186547524400844362104849039) /* 1/sqrt(2) */
 #endif
 
+#if __HAVE_FLOAT32X && defined __USE_GNU
+# define M_Ef32x	__f32x (2.718281828459045235360287471352662498) /* e */
+# define M_LOG2Ef32x	__f32x (1.442695040888963407359924681001892137) /* log_2 e */
+# define M_LOG10Ef32x	__f32x (0.434294481903251827651128918916605082) /* log_10 e */
+# define M_LN2f32x	__f32x (0.693147180559945309417232121458176568) /* log_e 2 */
+# define M_LN10f32x	__f32x (2.302585092994045684017991454684364208) /* log_e 10 */
+# define M_PIf32x	__f32x (3.141592653589793238462643383279502884) /* pi */
+# define M_PI_2f32x	__f32x (1.570796326794896619231321691639751442) /* pi/2 */
+# define M_PI_4f32x	__f32x (0.785398163397448309615660845819875721) /* pi/4 */
+# define M_1_PIf32x	__f32x (0.318309886183790671537767526745028724) /* 1/pi */
+# define M_2_PIf32x	__f32x (0.636619772367581343075535053490057448) /* 2/pi */
+# define M_2_SQRTPIf32x	__f32x (1.128379167095512573896158903121545172) /* 2/sqrt(pi) */
+# define M_SQRT2f32x	__f32x (1.414213562373095048801688724209698079) /* sqrt(2) */
+# define M_SQRT1_2f32x	__f32x (0.707106781186547524400844362104849039) /* 1/sqrt(2) */
+#endif
+
+#if __HAVE_FLOAT64X && defined __USE_GNU
+# define M_Ef64x	__f64x (2.718281828459045235360287471352662498) /* e */
+# define M_LOG2Ef64x	__f64x (1.442695040888963407359924681001892137) /* log_2 e */
+# define M_LOG10Ef64x	__f64x (0.434294481903251827651128918916605082) /* log_10 e */
+# define M_LN2f64x	__f64x (0.693147180559945309417232121458176568) /* log_e 2 */
+# define M_LN10f64x	__f64x (2.302585092994045684017991454684364208) /* log_e 10 */
+# define M_PIf64x	__f64x (3.141592653589793238462643383279502884) /* pi */
+# define M_PI_2f64x	__f64x (1.570796326794896619231321691639751442) /* pi/2 */
+# define M_PI_4f64x	__f64x (0.785398163397448309615660845819875721) /* pi/4 */
+# define M_1_PIf64x	__f64x (0.318309886183790671537767526745028724) /* 1/pi */
+# define M_2_PIf64x	__f64x (0.636619772367581343075535053490057448) /* 2/pi */
+# define M_2_SQRTPIf64x	__f64x (1.128379167095512573896158903121545172) /* 2/sqrt(pi) */
+# define M_SQRT2f64x	__f64x (1.414213562373095048801688724209698079) /* sqrt(2) */
+# define M_SQRT1_2f64x	__f64x (0.707106781186547524400844362104849039) /* 1/sqrt(2) */
+#endif
+
+#if __HAVE_FLOAT128X && defined __USE_GNU
+# error "M_* values needed for _Float128x"
+#endif
+
 /* When compiling in strict ISO C compatible mode we must not use the
    inline functions since they, among other things, do not set the
    `errno' variable correctly.  */