diff options
Diffstat (limited to 'lib/mlibc/options/ansi/musl-generic-math/asinf.c')
-rw-r--r-- | lib/mlibc/options/ansi/musl-generic-math/asinf.c | 61 |
1 files changed, 0 insertions, 61 deletions
diff --git a/lib/mlibc/options/ansi/musl-generic-math/asinf.c b/lib/mlibc/options/ansi/musl-generic-math/asinf.c deleted file mode 100644 index bcd304a..0000000 --- a/lib/mlibc/options/ansi/musl-generic-math/asinf.c +++ /dev/null @@ -1,61 +0,0 @@ -/* origin: FreeBSD /usr/src/lib/msun/src/e_asinf.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 double -pio2 = 1.570796326794896558e+00; - -static const float -/* coefficients for R(x^2) */ -pS0 = 1.6666586697e-01, -pS1 = -4.2743422091e-02, -pS2 = -8.6563630030e-03, -qS1 = -7.0662963390e-01; - -static float R(float z) -{ - float_t p, q; - p = z*(pS0+z*(pS1+z*pS2)); - q = 1.0f+z*qS1; - return p/q; -} - -float asinf(float x) -{ - double s; - float z; - uint32_t hx,ix; - - GET_FLOAT_WORD(hx, x); - ix = hx & 0x7fffffff; - if (ix >= 0x3f800000) { /* |x| >= 1 */ - if (ix == 0x3f800000) /* |x| == 1 */ - return x*pio2 + 0x1p-120f; /* asin(+-1) = +-pi/2 with inexact */ - return 0/(x-x); /* asin(|x|>1) is NaN */ - } - if (ix < 0x3f000000) { /* |x| < 0.5 */ - /* if 0x1p-126 <= |x| < 0x1p-12, avoid raising underflow */ - if (ix < 0x39800000 && ix >= 0x00800000) - return x; - return x + x*R(x*x); - } - /* 1 > |x| >= 0.5 */ - z = (1 - fabsf(x))*0.5f; - s = sqrt(z); - x = pio2 - 2*(s+s*R(z)); - if (hx >> 31) - return -x; - return x; -} |