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-rw-r--r--lib/mlibc/options/ansi/musl-generic-math/sqrtf.c84
1 files changed, 0 insertions, 84 deletions
diff --git a/lib/mlibc/options/ansi/musl-generic-math/sqrtf.c b/lib/mlibc/options/ansi/musl-generic-math/sqrtf.c
deleted file mode 100644
index 28cb4ad..0000000
--- a/lib/mlibc/options/ansi/musl-generic-math/sqrtf.c
+++ /dev/null
@@ -1,84 +0,0 @@
-/* origin: FreeBSD /usr/src/lib/msun/src/e_sqrtf.c */
-/*
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
- */
-/*
- * ====================================================
- * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
- *
- * Developed at SunPro, a Sun Microsystems, Inc. business.
- * Permission to use, copy, modify, and distribute this
- * software is freely granted, provided that this notice
- * is preserved.
- * ====================================================
- */
-
-#include "libm.h"
-
-static const float tiny = 1.0e-30;
-
-float sqrtf(float x)
-{
- float z;
- int32_t sign = (int)0x80000000;
- int32_t ix,s,q,m,t,i;
- uint32_t r;
-
- GET_FLOAT_WORD(ix, x);
-
- /* take care of Inf and NaN */
- if ((ix&0x7f800000) == 0x7f800000)
- return x*x + x; /* sqrt(NaN)=NaN, sqrt(+inf)=+inf, sqrt(-inf)=sNaN */
-
- /* take care of zero */
- if (ix <= 0) {
- if ((ix&~sign) == 0)
- return x; /* sqrt(+-0) = +-0 */
- if (ix < 0)
- return (x-x)/(x-x); /* sqrt(-ve) = sNaN */
- }
- /* normalize x */
- m = ix>>23;
- if (m == 0) { /* subnormal x */
- for (i = 0; (ix&0x00800000) == 0; i++)
- ix<<=1;
- m -= i - 1;
- }
- m -= 127; /* unbias exponent */
- ix = (ix&0x007fffff)|0x00800000;
- if (m&1) /* odd m, double x to make it even */
- ix += ix;
- m >>= 1; /* m = [m/2] */
-
- /* generate sqrt(x) bit by bit */
- ix += ix;
- q = s = 0; /* q = sqrt(x) */
- r = 0x01000000; /* r = moving bit from right to left */
-
- while (r != 0) {
- t = s + r;
- if (t <= ix) {
- s = t+r;
- ix -= t;
- q += r;
- }
- ix += ix;
- r >>= 1;
- }
-
- /* use floating add to find out rounding direction */
- if (ix != 0) {
- z = 1.0f - tiny; /* raise inexact flag */
- if (z >= 1.0f) {
- z = 1.0f + tiny;
- if (z > 1.0f)
- q += 2;
- else
- q += q & 1;
- }
- }
- ix = (q>>1) + 0x3f000000;
- ix += m << 23;
- SET_FLOAT_WORD(z, ix);
- return z;
-}