build: Build mlibc + add distclean target

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

1 files changed, 0 insertions, 194 deletions

diff --git a/lib/mlibc/options/ansi/musl-generic-math/fma.c b/lib/mlibc/options/ansi/musl-generic-math/fma.c
deleted file mode 100644
index f65eab7..0000000
--- a/lib/mlibc/options/ansi/musl-generic-math/fma.c
+++ /dev/null
@@ -1,194 +0,0 @@
-#include <stdint.h>
-#include <float.h>
-#include <math.h>
-
-static inline int a_clz_64(uint64_t x)
-{
-	uint32_t y;
-	int r;
-	if (x>>32) y=x>>32, r=0; else y=x, r=32;
-	if (y>>16) y>>=16; else r |= 16;
-	if (y>>8) y>>=8; else r |= 8;
-	if (y>>4) y>>=4; else r |= 4;
-	if (y>>2) y>>=2; else r |= 2;
-	return r | !(y>>1);
-}
-
-#define ASUINT64(x) ((union {double f; uint64_t i;}){x}).i
-#define ZEROINFNAN (0x7ff-0x3ff-52-1)
-
-struct num { uint64_t m; int e; int sign; };
-
-static struct num normalize(double x)
-{
-	uint64_t ix = ASUINT64(x);
-	int e = ix>>52;
-	int sign = e & 0x800;
-	e &= 0x7ff;
-	if (!e) {
-		ix = ASUINT64(x*0x1p63);
-		e = ix>>52 & 0x7ff;
-		e = e ? e-63 : 0x800;
-	}
-	ix &= (1ull<<52)-1;
-	ix |= 1ull<<52;
-	ix <<= 1;
-	e -= 0x3ff + 52 + 1;
-	return (struct num){ix,e,sign};
-}
-
-static void mul(uint64_t *hi, uint64_t *lo, uint64_t x, uint64_t y)
-{
-	uint64_t t1,t2,t3;
-	uint64_t xlo = (uint32_t)x, xhi = x>>32;
-	uint64_t ylo = (uint32_t)y, yhi = y>>32;
-
-	t1 = xlo*ylo;
-	t2 = xlo*yhi + xhi*ylo;
-	t3 = xhi*yhi;
-	*lo = t1 + (t2<<32);
-	*hi = t3 + (t2>>32) + (t1 > *lo);
-}
-
-double fma(double x, double y, double z)
-{
-	#pragma STDC FENV_ACCESS ON
-
-	/* normalize so top 10bits and last bit are 0 */
-	struct num nx, ny, nz;
-	nx = normalize(x);
-	ny = normalize(y);
-	nz = normalize(z);
-
-	if (nx.e >= ZEROINFNAN || ny.e >= ZEROINFNAN)
-		return x*y + z;
-	if (nz.e >= ZEROINFNAN) {
-		if (nz.e > ZEROINFNAN) /* z==0 */
-			return x*y + z;
-		return z;
-	}
-
-	/* mul: r = x*y */
-	uint64_t rhi, rlo, zhi, zlo;
-	mul(&rhi, &rlo, nx.m, ny.m);
-	/* either top 20 or 21 bits of rhi and last 2 bits of rlo are 0 */
-
-	/* align exponents */
-	int e = nx.e + ny.e;
-	int d = nz.e - e;
-	/* shift bits z<<=kz, r>>=kr, so kz+kr == d, set e = e+kr (== ez-kz) */
-	if (d > 0) {
-		if (d < 64) {
-			zlo = nz.m<<d;
-			zhi = nz.m>>64-d;
-		} else {
-			zlo = 0;
-			zhi = nz.m;
-			e = nz.e - 64;
-			d -= 64;
-			if (d == 0) {
-			} else if (d < 64) {
-				rlo = rhi<<64-d | rlo>>d | !!(rlo<<64-d);
-				rhi = rhi>>d;
-			} else {
-				rlo = 1;
-				rhi = 0;
-			}
-		}
-	} else {
-		zhi = 0;
-		d = -d;
-		if (d == 0) {
-			zlo = nz.m;
-		} else if (d < 64) {
-			zlo = nz.m>>d | !!(nz.m<<64-d);
-		} else {
-			zlo = 1;
-		}
-	}
-
-	/* add */
-	int sign = nx.sign^ny.sign;
-	int samesign = !(sign^nz.sign);
-	int nonzero = 1;
-	if (samesign) {
-		/* r += z */
-		rlo += zlo;
-		rhi += zhi + (rlo < zlo);
-	} else {
-		/* r -= z */
-		uint64_t t = rlo;
-		rlo -= zlo;
-		rhi = rhi - zhi - (t < rlo);
-		if (rhi>>63) {
-			rlo = -rlo;
-			rhi = -rhi-!!rlo;
-			sign = !sign;
-		}
-		nonzero = !!rhi;
-	}
-
-	/* set rhi to top 63bit of the result (last bit is sticky) */
-	if (nonzero) {
-		e += 64;
-		d = a_clz_64(rhi)-1;
-		/* note: d > 0 */
-		rhi = rhi<<d | rlo>>64-d | !!(rlo<<d);
-	} else if (rlo) {
-		d = a_clz_64(rlo)-1;
-		if (d < 0)
-			rhi = rlo>>1 | (rlo&1);
-		else
-			rhi = rlo<<d;
-	} else {
-		/* exact +-0 */
-		return x*y + z;
-	}
-	e -= d;
-
-	/* convert to double */
-	int64_t i = rhi; /* i is in [1<<62,(1<<63)-1] */
-	if (sign)
-		i = -i;
-	double r = i; /* |r| is in [0x1p62,0x1p63] */
-
-	if (e < -1022-62) {
-		/* result is subnormal before rounding */
-		if (e == -1022-63) {
-			double c = 0x1p63;
-			if (sign)
-				c = -c;
-			if (r == c) {
-				/* min normal after rounding, underflow depends
-				   on arch behaviour which can be imitated by
-				   a double to float conversion */
-				float fltmin = 0x0.ffffff8p-63*FLT_MIN * r;
-				return DBL_MIN/FLT_MIN * fltmin;
-			}
-			/* one bit is lost when scaled, add another top bit to
-			   only round once at conversion if it is inexact */
-			if (rhi << 53) {
-				i = rhi>>1 | (rhi&1) | 1ull<<62;
-				if (sign)
-					i = -i;
-				r = i;
-				r = 2*r - c; /* remove top bit */
-
-				/* raise underflow portably, such that it
-				   cannot be optimized away */
-				{
-					double_t tiny = DBL_MIN/FLT_MIN * r;
-					r += (double)(tiny*tiny) * (r-r);
-				}
-			}
-		} else {
-			/* only round once when scaled */
-			d = 10;
-			i = ( rhi>>d | !!(rhi<<64-d) ) << d;
-			if (sign)
-				i = -i;
-			r = i;
-		}
-	}
-	return scalbn(r, e);
-}