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diff --git a/ndk/android-ndk-r6/platforms/android-3/arch-arm/usr/include/math.h b/ndk/android-ndk-r6/platforms/android-3/arch-arm/usr/include/math.h
new file mode 100644
index 0000000..ef6a9e6
--- /dev/null
+++ b/ndk/android-ndk-r6/platforms/android-3/arch-arm/usr/include/math.h
@@ -0,0 +1,486 @@
+/*
+ * ====================================================
+ * 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.
+ * ====================================================
+ */
+
+/*
+ * from: @(#)fdlibm.h 5.1 93/09/24
+ * $FreeBSD: src/lib/msun/src/math.h,v 1.61 2005/04/16 21:12:47 das Exp $
+ */
+
+#ifndef _MATH_H_
+#define	_MATH_H_
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+#include <limits.h>
+
+#define __pure2
+
+/*
+ * ANSI/POSIX
+ */
+extern const union __infinity_un {
+	unsigned char	__uc[8];
+	double		__ud;
+} __infinity;
+
+extern const union __nan_un {
+	unsigned char	__uc[sizeof(float)];
+	float		__uf;
+} __nan;
+
+/* #if __GNUC_PREREQ__(3, 3) || (defined(__INTEL_COMPILER) && __INTEL_COMPILER >= 800) */
+#if 1
+#define	__MATH_BUILTIN_CONSTANTS
+#endif
+
+/* #if __GNUC_PREREQ__(3, 0) && !defined(__INTEL_COMPILER) */
+#if 1
+#define	__MATH_BUILTIN_RELOPS
+#endif
+
+/* #ifdef __MATH_BUILTIN_CONSTANTS */
+#if 1
+#define	HUGE_VAL	__builtin_huge_val()
+#else
+#define	HUGE_VAL	(__infinity.__ud)
+#endif
+
+/* #if __ISO_C_VISIBLE >= 1999 */
+#if 0
+#define	FP_ILOGB0	(-__INT_MAX)
+#define	FP_ILOGBNAN	__INT_MAX
+#else
+#define	FP_ILOGB0	(-INT_MAX)
+#define	FP_ILOGBNAN	INT_MAX
+#endif
+
+#ifdef __MATH_BUILTIN_CONSTANTS
+#define	HUGE_VALF	__builtin_huge_valf()
+#define	HUGE_VALL	__builtin_huge_vall()
+#define	INFINITY	__builtin_inf()
+#define	NAN		__builtin_nan("")
+#else
+#define	HUGE_VALF	(float)HUGE_VAL
+#define	HUGE_VALL	(long double)HUGE_VAL
+#define	INFINITY	HUGE_VALF
+#define	NAN		(__nan.__uf)
+#endif /* __MATH_BUILTIN_CONSTANTS */
+
+#define	MATH_ERRNO	1
+#define	MATH_ERREXCEPT	2
+#define	math_errhandling	MATH_ERREXCEPT
+
+/* XXX We need a <machine/math.h>. */
+#if defined(__ia64__) || defined(__sparc64__)
+#define	FP_FAST_FMA
+#endif
+#ifdef __ia64__
+#define	FP_FAST_FMAL
+#endif
+#define	FP_FAST_FMAF
+
+/* Symbolic constants to classify floating point numbers. */
+#define	FP_INFINITE	0x01
+#define	FP_NAN		0x02
+#define	FP_NORMAL	0x04
+#define	FP_SUBNORMAL	0x08
+#define	FP_ZERO		0x10
+#define	fpclassify(x) \
+    ((sizeof (x) == sizeof (float)) ? __fpclassifyf(x) \
+    : (sizeof (x) == sizeof (double)) ? __fpclassifyd(x) \
+    : __fpclassifyl(x))
+
+#define	isfinite(x)					\
+    ((sizeof (x) == sizeof (float)) ? __isfinitef(x)	\
+    : (sizeof (x) == sizeof (double)) ? __isfinite(x)	\
+    : __isfinitel(x))
+#define	isinf(x)					\
+    ((sizeof (x) == sizeof (float)) ? __isinff(x)	\
+    : (sizeof (x) == sizeof (double)) ? __isinf(x)	\
+    : __isinfl(x))
+#define	isnan(x)					\
+    ((sizeof (x) == sizeof (float)) ? isnanf(x)		\
+    : (sizeof (x) == sizeof (double)) ? isnan(x)	\
+    : __isnanl(x))
+#define	isnormal(x)					\
+    ((sizeof (x) == sizeof (float)) ? __isnormalf(x)	\
+    : (sizeof (x) == sizeof (double)) ? __isnormal(x)	\
+    : __isnormall(x))
+
+#ifdef __MATH_BUILTIN_RELOPS
+#define	isgreater(x, y)		__builtin_isgreater((x), (y))
+#define	isgreaterequal(x, y)	__builtin_isgreaterequal((x), (y))
+#define	isless(x, y)		__builtin_isless((x), (y))
+#define	islessequal(x, y)	__builtin_islessequal((x), (y))
+#define	islessgreater(x, y)	__builtin_islessgreater((x), (y))
+#define	isunordered(x, y)	__builtin_isunordered((x), (y))
+#else
+#define	isgreater(x, y)		(!isunordered((x), (y)) && (x) > (y))
+#define	isgreaterequal(x, y)	(!isunordered((x), (y)) && (x) >= (y))
+#define	isless(x, y)		(!isunordered((x), (y)) && (x) < (y))
+#define	islessequal(x, y)	(!isunordered((x), (y)) && (x) <= (y))
+#define	islessgreater(x, y)	(!isunordered((x), (y)) && \
+					((x) > (y) || (y) > (x)))
+#define	isunordered(x, y)	(isnan(x) || isnan(y))
+#endif /* __MATH_BUILTIN_RELOPS */
+
+#define	signbit(x)					\
+    ((sizeof (x) == sizeof (float)) ? __signbitf(x)	\
+    : (sizeof (x) == sizeof (double)) ? __signbit(x)	\
+    : __signbitl(x))
+
+#if 0
+typedef	__double_t	double_t;
+typedef	__float_t	float_t;
+#endif 
+/* #endif */ /* __ISO_C_VISIBLE >= 1999 */
+
+/*
+ * XOPEN/SVID
+ */
+/* #if __BSD_VISIBLE || __XSI_VISIBLE */
+#define	M_E		2.7182818284590452354	/* e */
+#define	M_LOG2E		1.4426950408889634074	/* log 2e */
+#define	M_LOG10E	0.43429448190325182765	/* log 10e */
+#define	M_LN2		0.69314718055994530942	/* log e2 */
+#define	M_LN10		2.30258509299404568402	/* log e10 */
+#define	M_PI		3.14159265358979323846	/* pi */
+#define	M_PI_2		1.57079632679489661923	/* pi/2 */
+#define	M_PI_4		0.78539816339744830962	/* pi/4 */
+#define	M_1_PI		0.31830988618379067154	/* 1/pi */
+#define	M_2_PI		0.63661977236758134308	/* 2/pi */
+#define	M_2_SQRTPI	1.12837916709551257390	/* 2/sqrt(pi) */
+#define	M_SQRT2		1.41421356237309504880	/* sqrt(2) */
+#define	M_SQRT1_2	0.70710678118654752440	/* 1/sqrt(2) */
+
+#define	MAXFLOAT	((float)3.40282346638528860e+38)
+extern int signgam;
+/* #endif */ /* __BSD_VISIBLE || __XSI_VISIBLE */
+
+#if __BSD_VISIBLE
+#if 0
+/* Old value from 4.4BSD-Lite math.h; this is probably better. */
+#define	HUGE		HUGE_VAL
+#else
+#define	HUGE		MAXFLOAT
+#endif
+#endif /* __BSD_VISIBLE */
+
+/*
+ * Most of these functions depend on the rounding mode and have the side
+ * effect of raising floating-point exceptions, so they are not declared
+ * as __pure2.  In C99, FENV_ACCESS affects the purity of these functions.
+ */
+__BEGIN_DECLS
+/*
+ * ANSI/POSIX
+ */
+int	__fpclassifyd(double) __pure2;
+int	__fpclassifyf(float) __pure2;
+int	__fpclassifyl(long double) __pure2;
+int	__isfinitef(float) __pure2;
+int	__isfinite(double) __pure2;
+int	__isfinitel(long double) __pure2;
+int	__isinff(float) __pure2;
+int     __isinf(double) __pure2;
+int	__isinfl(long double) __pure2;
+int	__isnanl(long double) __pure2;
+int	__isnormalf(float) __pure2;
+int	__isnormal(double) __pure2;
+int	__isnormall(long double) __pure2;
+int	__signbit(double) __pure2;
+int	__signbitf(float) __pure2;
+int	__signbitl(long double) __pure2;
+
+double	acos(double);
+double	asin(double);
+double	atan(double);
+double	atan2(double, double);
+double	cos(double);
+double	sin(double);
+double	tan(double);
+
+double	cosh(double);
+double	sinh(double);
+double	tanh(double);
+
+double	exp(double);
+double	frexp(double, int *);	/* fundamentally !__pure2 */
+double	ldexp(double, int);
+double	log(double);
+double	log10(double);
+double	modf(double, double *);	/* fundamentally !__pure2 */
+
+double	pow(double, double);
+double	sqrt(double);
+
+double	ceil(double);
+double	fabs(double) __pure2;
+double	floor(double);
+double	fmod(double, double);
+
+/*
+ * These functions are not in C90.
+ */
+/* #if __BSD_VISIBLE || __ISO_C_VISIBLE >= 1999 || __XSI_VISIBLE */
+double	acosh(double);
+double	asinh(double);
+double	atanh(double);
+double	cbrt(double);
+double	erf(double);
+double	erfc(double);
+double	exp2(double);
+double	expm1(double);
+double	fma(double, double, double);
+double	hypot(double, double);
+int	ilogb(double) __pure2;
+/* int	(isinf)(double) __pure2; */
+int	(isnan)(double) __pure2;
+double	lgamma(double);
+long long llrint(double);
+long long llround(double);
+double	log1p(double);
+double	logb(double);
+long	lrint(double);
+long	lround(double);
+double	nextafter(double, double);
+double	remainder(double, double);
+double	remquo(double, double, int *);
+double	rint(double);
+/* #endif */ /* __BSD_VISIBLE || __ISO_C_VISIBLE >= 1999 || __XSI_VISIBLE */
+
+/* #if __BSD_VISIBLE || __XSI_VISIBLE */
+double	j0(double);
+double	j1(double);
+double	jn(int, double);
+double	scalb(double, double);
+double	y0(double);
+double	y1(double);
+double	yn(int, double);
+
+/* #if __XSI_VISIBLE <= 500 || __BSD_VISIBLE */
+double	gamma(double);
+/* #endif */
+/* #endif */ /* __BSD_VISIBLE || __XSI_VISIBLE */
+
+/* #if __BSD_VISIBLE || __ISO_C_VISIBLE >= 1999 */
+double	copysign(double, double) __pure2;
+double	fdim(double, double);
+double	fmax(double, double) __pure2;
+double	fmin(double, double) __pure2;
+double	nearbyint(double);
+double	round(double);
+double	scalbln(double, long);
+double	scalbn(double, int);
+double	tgamma(double);
+double	trunc(double);
+/* #endif */
+
+/*
+ * BSD math library entry points
+ */
+/* #if __BSD_VISIBLE */
+double	drem(double, double);
+int	finite(double) __pure2;
+int	isnanf(float) __pure2;
+
+/*
+ * Reentrant version of gamma & lgamma; passes signgam back by reference
+ * as the second argument; user must allocate space for signgam.
+ */
+double	gamma_r(double, int *);
+double	lgamma_r(double, int *);
+
+/*
+ * IEEE Test Vector
+ */
+double	significand(double);
+/* #endif */ /* __BSD_VISIBLE */
+
+/* float versions of ANSI/POSIX functions */
+/*#if __ISO_C_VISIBLE >= 1999 */
+float	acosf(float);
+float	asinf(float);
+float	atanf(float);
+float	atan2f(float, float);
+float	cosf(float);
+float	sinf(float);
+float	tanf(float);
+
+float	coshf(float);
+float	sinhf(float);
+float	tanhf(float);
+
+float	exp2f(float);
+float	expf(float);
+float	expm1f(float);
+float	frexpf(float, int *);	/* fundamentally !__pure2 */
+int	ilogbf(float) __pure2;
+float	ldexpf(float, int);
+float	log10f(float);
+float	log1pf(float);
+float	logf(float);
+float	modff(float, float *);	/* fundamentally !__pure2 */
+
+float	powf(float, float);
+float	sqrtf(float);
+
+float	ceilf(float);
+float	fabsf(float) __pure2;
+float	floorf(float);
+float	fmodf(float, float);
+float	roundf(float);
+
+float	erff(float);
+float	erfcf(float);
+float	hypotf(float, float);
+float	lgammaf(float);
+
+float	acoshf(float);
+float	asinhf(float);
+float	atanhf(float);
+float	cbrtf(float);
+float	logbf(float);
+float	copysignf(float, float) __pure2;
+long long llrintf(float);
+long long llroundf(float);
+long	lrintf(float);
+long	lroundf(float);
+float	nearbyintf(float);
+float	nextafterf(float, float);
+float	remainderf(float, float);
+float	remquof(float, float, int *);
+float	rintf(float);
+float	scalblnf(float, long);
+float	scalbnf(float, int);
+float	truncf(float);
+
+float	fdimf(float, float);
+float	fmaf(float, float, float);
+float	fmaxf(float, float) __pure2;
+float	fminf(float, float) __pure2;
+/* #endif */
+
+/*
+ * float versions of BSD math library entry points
+ */
+/* #if __BSD_VISIBLE */
+float	dremf(float, float);
+int	finitef(float) __pure2;
+float	gammaf(float);
+float	j0f(float);
+float	j1f(float);
+float	jnf(int, float);
+float	scalbf(float, float);
+float	y0f(float);
+float	y1f(float);
+float	ynf(int, float);
+
+/*
+ * Float versions of reentrant version of gamma & lgamma; passes
+ * signgam back by reference as the second argument; user must
+ * allocate space for signgam.
+ */
+float	gammaf_r(float, int *);
+float	lgammaf_r(float, int *);
+
+/*
+ * float version of IEEE Test Vector
+ */
+float	significandf(float);
+/* #endif */	/* __BSD_VISIBLE */ 
+
+/*
+ * long double versions of ISO/POSIX math functions
+ */
+/* #if __ISO_C_VISIBLE >= 1999 */
+#if 0
+long double	acoshl(long double);
+long double	acosl(long double);
+long double	asinhl(long double);
+long double	asinl(long double);
+long double	atan2l(long double, long double);
+long double	atanhl(long double);
+long double	atanl(long double);
+long double	cbrtl(long double);
+#endif
+long double	ceill(long double);
+long double	copysignl(long double, long double) __pure2;
+#if 0
+long double	coshl(long double);
+long double	cosl(long double);
+long double	erfcl(long double);
+long double	erfl(long double);
+long double	exp2l(long double);
+long double	expl(long double);
+long double	expm1l(long double);
+#endif
+long double	fabsl(long double) __pure2;
+long double	fdiml(long double, long double);
+long double	floorl(long double);
+long double	fmal(long double, long double, long double);
+long double	fmaxl(long double, long double) __pure2;
+long double	fminl(long double, long double) __pure2;
+#if 0
+long double	fmodl(long double, long double);
+#endif
+long double	frexpl(long double value, int *); /* fundamentally !__pure2 */
+#if 0
+long double	hypotl(long double, long double);
+#endif
+int		ilogbl(long double) __pure2;
+long double	ldexpl(long double, int);
+#if 0
+long double	lgammal(long double);
+long long	llrintl(long double);
+#endif
+long long	llroundl(long double);
+#if 0
+long double	log10l(long double);
+long double	log1pl(long double);
+long double	log2l(long double);
+long double	logbl(long double);
+long double	logl(long double);
+long		lrintl(long double);
+#endif
+long		lroundl(long double);
+#if 0
+long double	modfl(long double, long double *); /* fundamentally !__pure2 */
+long double	nanl(const char *) __pure2;
+long double	nearbyintl(long double);
+#endif
+long double	nextafterl(long double, long double);
+double		nexttoward(double, long double);
+float		nexttowardf(float, long double);
+long double	nexttowardl(long double, long double);
+#if 0
+long double	powl(long double, long double);
+long double	remainderl(long double, long double);
+long double	remquol(long double, long double, int *);
+long double	rintl(long double);
+#endif
+long double	roundl(long double);
+long double	scalblnl(long double, long);
+long double	scalbnl(long double, int);
+#if 0
+long double	sinhl(long double);
+long double	sinl(long double);
+long double	sqrtl(long double);
+long double	tanhl(long double);
+long double	tanl(long double);
+long double	tgammal(long double);
+#endif
+long double	truncl(long double);
+
+/* #endif */ /* __ISO_C_VISIBLE >= 1999 */
+__END_DECLS
+
+#endif /* !_MATH_H_ */