build: Build mlibc + add distclean target

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 0 insertions, 134 deletions

diff --git a/lib/mlibc/options/ansi/musl-generic-math/exp.c b/lib/mlibc/options/ansi/musl-generic-math/exp.c
deleted file mode 100644
index 9ea672f..0000000
--- a/lib/mlibc/options/ansi/musl-generic-math/exp.c
+++ /dev/null
@@ -1,134 +0,0 @@
-/* origin: FreeBSD /usr/src/lib/msun/src/e_exp.c */
-/*
- * ====================================================
- * Copyright (C) 2004 by Sun Microsystems, Inc. All rights reserved.
- *
- * Permission to use, copy, modify, and distribute this
- * software is freely granted, provided that this notice
- * is preserved.
- * ====================================================
- */
-/* exp(x)
- * Returns the exponential of x.
- *
- * Method
- *   1. Argument reduction:
- *      Reduce x to an r so that |r| <= 0.5*ln2 ~ 0.34658.
- *      Given x, find r and integer k such that
- *
- *               x = k*ln2 + r,  |r| <= 0.5*ln2.
- *
- *      Here r will be represented as r = hi-lo for better
- *      accuracy.
- *
- *   2. Approximation of exp(r) by a special rational function on
- *      the interval [0,0.34658]:
- *      Write
- *          R(r**2) = r*(exp(r)+1)/(exp(r)-1) = 2 + r*r/6 - r**4/360 + ...
- *      We use a special Remez algorithm on [0,0.34658] to generate
- *      a polynomial of degree 5 to approximate R. The maximum error
- *      of this polynomial approximation is bounded by 2**-59. In
- *      other words,
- *          R(z) ~ 2.0 + P1*z + P2*z**2 + P3*z**3 + P4*z**4 + P5*z**5
- *      (where z=r*r, and the values of P1 to P5 are listed below)
- *      and
- *          |                  5          |     -59
- *          | 2.0+P1*z+...+P5*z   -  R(z) | <= 2
- *          |                             |
- *      The computation of exp(r) thus becomes
- *                              2*r
- *              exp(r) = 1 + ----------
- *                            R(r) - r
- *                                 r*c(r)
- *                     = 1 + r + ----------- (for better accuracy)
- *                                2 - c(r)
- *      where
- *                              2       4             10
- *              c(r) = r - (P1*r  + P2*r  + ... + P5*r   ).
- *
- *   3. Scale back to obtain exp(x):
- *      From step 1, we have
- *         exp(x) = 2^k * exp(r)
- *
- * Special cases:
- *      exp(INF) is INF, exp(NaN) is NaN;
- *      exp(-INF) is 0, and
- *      for finite argument, only exp(0)=1 is exact.
- *
- * Accuracy:
- *      according to an error analysis, the error is always less than
- *      1 ulp (unit in the last place).
- *
- * Misc. info.
- *      For IEEE double
- *          if x >  709.782712893383973096 then exp(x) overflows
- *          if x < -745.133219101941108420 then exp(x) underflows
- */
-
-#include "libm.h"
-
-static const double
-half[2] = {0.5,-0.5},
-ln2hi = 6.93147180369123816490e-01, /* 0x3fe62e42, 0xfee00000 */
-ln2lo = 1.90821492927058770002e-10, /* 0x3dea39ef, 0x35793c76 */
-invln2 = 1.44269504088896338700e+00, /* 0x3ff71547, 0x652b82fe */
-P1   =  1.66666666666666019037e-01, /* 0x3FC55555, 0x5555553E */
-P2   = -2.77777777770155933842e-03, /* 0xBF66C16C, 0x16BEBD93 */
-P3   =  6.61375632143793436117e-05, /* 0x3F11566A, 0xAF25DE2C */
-P4   = -1.65339022054652515390e-06, /* 0xBEBBBD41, 0xC5D26BF1 */
-P5   =  4.13813679705723846039e-08; /* 0x3E663769, 0x72BEA4D0 */
-
-double exp(double x)
-{
-	double_t hi, lo, c, xx, y;
-	int k, sign;
-	uint32_t hx;
-
-	GET_HIGH_WORD(hx, x);
-	sign = hx>>31;
-	hx &= 0x7fffffff;  /* high word of |x| */
-
-	/* special cases */
-	if (hx >= 0x4086232b) {  /* if |x| >= 708.39... */
-		if (isnan(x))
-			return x;
-		if (x > 709.782712893383973096) {
-			/* overflow if x!=inf */
-			x *= 0x1p1023;
-			return x;
-		}
-		if (x < -708.39641853226410622) {
-			/* underflow if x!=-inf */
-			FORCE_EVAL((float)(-0x1p-149/x));
-			if (x < -745.13321910194110842)
-				return 0;
-		}
-	}
-
-	/* argument reduction */
-	if (hx > 0x3fd62e42) {  /* if |x| > 0.5 ln2 */
-		if (hx >= 0x3ff0a2b2)  /* if |x| >= 1.5 ln2 */
-			k = (int)(invln2*x + half[sign]);
-		else
-			k = 1 - sign - sign;
-		hi = x - k*ln2hi;  /* k*ln2hi is exact here */
-		lo = k*ln2lo;
-		x = hi - lo;
-	} else if (hx > 0x3e300000)  {  /* if |x| > 2**-28 */
-		k = 0;
-		hi = x;
-		lo = 0;
-	} else {
-		/* inexact if x!=0 */
-		FORCE_EVAL(0x1p1023 + x);
-		return 1 + x;
-	}
-
-	/* x is now in primary range */
-	xx = x*x;
-	c = x - xx*(P1+xx*(P2+xx*(P3+xx*(P4+xx*P5))));
-	y = 1 + (x*c/(2-c) - lo + hi);
-	if (k == 0)
-		return y;
-	return scalbn(y, k);
-}