git: 22ddb5bb83a2 - main - math: Add long double constant definitions

The branch main has been updated by imp:

URL: https://cgit.FreeBSD.org/src/commit/?id=22ddb5bb83a2c963821c96317318389d07300d2e

commit 22ddb5bb83a2c963821c96317318389d07300d2e
Author:     Collin Funk <collin.funk1@gmail.com>
AuthorDate: 2024-04-12 17:12:59 +0000
Commit:     Warner Losh <imp@FreeBSD.org>
CommitDate: 2024-04-12 18:30:58 +0000

    math: Add long double constant definitions
    
    These constants are GNU libc extensions that are likely to be adopted
    by the next POSIX revision [1]. The definitions can be verified in
    a PARI-GP shell session:
    
    * M_El: exp (1)
    * M_LOG2El: log (exp (1)) / log (2)
    * M_LOG10El: log (exp (1)) / log (10)
    * M_LN2l: log (2)
    * M_LN10l: log (10)
    * M_PIl: Pi
    * M_PI_2l: Pi / 2
    * M_PI_4l: Pi / 4
    * M_1_PIl: 1 / Pi
    * M_2_PIl: 2 / Pi
    * M_2_SQRTPIl: 2 / sqrt (Pi)
    * M_SQRT2l: sqrt (2)
    * M_SQRT1_2l: 1 / sqrt (2)
    
    [1] https://austingroupbugs.net/view.php?id=828
    
    Put these behind __BSD_VISIBLE || __XSI_VISIBLE >= 800 to future-proof
    these changes. They shouldn't be defined at lower levels of XSI, but don't
    have other XSI 800 stuff in place yet.
    
    Signed-off-by: Collin Funk <collin.funk1@gmail.com>
    Reviewed by: imp, allanjude
    Pull Request: https://github.com/freebsd/freebsd-src/pull/1121
---
 lib/msun/src/math.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/lib/msun/src/math.h b/lib/msun/src/math.h
index 5fc359ead158..0abf4b605fb8 100644
--- a/lib/msun/src/math.h
+++ b/lib/msun/src/math.h
@@ -142,6 +142,22 @@ typedef	__float_t	float_t;
 #define	M_SQRT2		1.41421356237309504880	/* sqrt(2) */
 #define	M_SQRT1_2	0.70710678118654752440	/* 1/sqrt(2) */
 
+#if __BSD_VISIBLE || __XSI_VISIBLE >= 800
+#define	M_El		2.718281828459045235360287471352662498L	/* e */
+#define	M_LOG2El	1.442695040888963407359924681001892137L	/* log_2 e */
+#define	M_LOG10El	0.434294481903251827651128918916605082L	/* log_10 e */
+#define	M_LN2l		0.693147180559945309417232121458176568L	/* log_e 2 */
+#define	M_LN10l		2.302585092994045684017991454684364208L	/* log_e 10 */
+#define	M_PIl		3.141592653589793238462643383279502884L	/* pi */
+#define	M_PI_2l		1.570796326794896619231321691639751442L	/* pi/2 */
+#define	M_PI_4l		0.785398163397448309615660845819875721L	/* pi/4 */
+#define	M_1_PIl		0.318309886183790671537767526745028724L	/* 1/pi */
+#define	M_2_PIl		0.636619772367581343075535053490057448L	/* 2/pi */
+#define	M_2_SQRTPIl	1.128379167095512573896158903121545172L	/* 2/sqrt(pi) */
+#define	M_SQRT2l	1.414213562373095048801688724209698079L	/* sqrt(2) */
+#define	M_SQRT1_2l	0.707106781186547524400844362104849039L	/* 1/sqrt(2) */
+#endif /* __BSD_VISIBLE || __XSI_VISIBLE >= 800 */
+
 #define	MAXFLOAT	((float)3.40282346638528860e+38)
 extern int signgam;
 #endif /* __BSD_VISIBLE || __XSI_VISIBLE */