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Re-org platform APIs: move most platform APIs of iwasm to shared-lib (#45)

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wenyongh
2019-07-22 11:32:51 +08:00
committed by GitHub
parent 08ebc6c773
commit 1db5a2f697
39 changed files with 387 additions and 899 deletions
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126
core/shared-lib/platform/alios/COPYRIGHT Normal file
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# $FreeBSD$
# @(#)COPYRIGHT 8.2 (Berkeley) 3/21/94
The compilation of software known as FreeBSD is distributed under the
following terms:
Copyright (c) 1992-2019 The FreeBSD Project.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
The 4.4BSD and 4.4BSD-Lite software is distributed under the following
terms:
All of the documentation and software included in the 4.4BSD and 4.4BSD-Lite
Releases is copyrighted by The Regents of the University of California.
Copyright 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this software
must display the following acknowledgement:
This product includes software developed by the University of
California, Berkeley and its contributors.
4. Neither the name of the University nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
The Institute of Electrical and Electronics Engineers and the American
National Standards Committee X3, on Information Processing Systems have
given us permission to reprint portions of their documentation.
In the following statement, the phrase ``this text'' refers to portions
of the system documentation.
Portions of this text are reprinted and reproduced in electronic form in
the second BSD Networking Software Release, from IEEE Std 1003.1-1988, IEEE
Standard Portable Operating System Interface for Computer Environments
(POSIX), copyright C 1988 by the Institute of Electrical and Electronics
Engineers, Inc. In the event of any discrepancy between these versions
and the original IEEE Standard, the original IEEE Standard is the referee
document.
In the following statement, the phrase ``This material'' refers to portions
of the system documentation.
This material is reproduced with permission from American National
Standards Committee X3, on Information Processing Systems. Computer and
Business Equipment Manufacturers Association (CBEMA), 311 First St., NW,
Suite 500, Washington, DC 20001-2178. The developmental work of
Programming Language C was completed by the X3J11 Technical Committee.
The views and conclusions contained in the software and documentation are
those of the authors and should not be interpreted as representing official
policies, either expressed or implied, of the Regents of the University
of California.
NOTE: The copyright of UC Berkeley's Berkeley Software Distribution ("BSD")
source has been updated. The copyright addendum may be found at
ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change and is
included below.
July 22, 1999
To All Licensees, Distributors of Any Version of BSD:
As you know, certain of the Berkeley Software Distribution ("BSD") source
code files require that further distributions of products containing all or
portions of the software, acknowledge within their advertising materials
that such products contain software developed by UC Berkeley and its
contributors.
Specifically, the provision reads:
" * 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors."
Effective immediately, licensees and distributors are no longer required to
include the acknowledgement within advertising materials. Accordingly, the
foregoing paragraph of those BSD Unix files containing it is hereby deleted
in its entirety.
William Hoskins
Director, Office of Technology Licensing
University of California, Berkeley

585
core/shared-lib/platform/alios/bh_math.c Normal file
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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2004 David Schultz <das@FreeBSD.ORG>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include "bh_platform.h"
#define __FDLIBM_STDC__
typedef uint32_t u_int32_t;
typedef uint64_t u_int64_t;
typedef union u32double_tag {
int *pint;
double *pdouble;
} U32DOUBLE;
static inline int *
pdouble2pint(double *pdouble)
{
U32DOUBLE u;
u.pdouble = pdouble;
return u.pint;
}
typedef union
{
double value;
struct
{
u_int32_t lsw;
u_int32_t msw;
} parts;
struct
{
u_int64_t w;
} xparts;
} ieee_double_shape_type_little;
typedef union
{
double value;
struct
{
u_int32_t msw;
u_int32_t lsw;
} parts;
struct
{
u_int64_t w;
} xparts;
} ieee_double_shape_type_big;
typedef union {
double d;
struct {
unsigned int manl :32;
unsigned int manh :20;
unsigned int exp :11;
unsigned int sign :1;
} bits;
} IEEEd2bits_L;
typedef union {
double d;
struct {
unsigned int sign :1;
unsigned int exp :11;
unsigned int manh :20;
unsigned int manl :32;
} bits;
} IEEEd2bits_B;
static union {
int a;
char b;
} __ue = { .a = 1 };
#define is_little_endian() (__ue.b == 1)
#define __HIL(x) *(1+pdouble2pint(&x))
#define __LOL(x) *(pdouble2pint(&x))
#define __HIB(x) *(int*)&x
#define __LOB(x) *(1+(int*)&x)
/* Get two 32 bit ints from a double. */
#define EXTRACT_WORDS_L(ix0,ix1,d) \
do { \
ieee_double_shape_type_little ew_u; \
ew_u.value = (d); \
(ix0) = ew_u.parts.msw; \
(ix1) = ew_u.parts.lsw; \
} while (0)
/* Set a double from two 32 bit ints. */
#define INSERT_WORDS_L(d,ix0,ix1) \
do { \
ieee_double_shape_type_little iw_u; \
iw_u.parts.msw = (ix0); \
iw_u.parts.lsw = (ix1); \
(d) = iw_u.value; \
} while (0)
/* Get two 32 bit ints from a double. */
#define EXTRACT_WORDS_B(ix0,ix1,d) \
do { \
ieee_double_shape_type_big ew_u; \
ew_u.value = (d); \
(ix0) = ew_u.parts.msw; \
(ix1) = ew_u.parts.lsw; \
} while (0)
/* Set a double from two 32 bit ints. */
#define INSERT_WORDS_B(d,ix0,ix1) \
do { \
ieee_double_shape_type_big iw_u; \
iw_u.parts.msw = (ix0); \
iw_u.parts.lsw = (ix1); \
(d) = iw_u.value; \
} while (0)
/* Get the more significant 32 bit int from a double. */
#define GET_HIGH_WORD_L(i,d) \
do { \
ieee_double_shape_type_little gh_u; \
gh_u.value = (d); \
(i) = gh_u.parts.msw; \
} while (0)
/* Get the more significant 32 bit int from a double. */
#define GET_HIGH_WORD_B(i,d) \
do { \
ieee_double_shape_type_big gh_u; \
gh_u.value = (d); \
(i) = gh_u.parts.msw; \
} while (0)
/* Set the more significant 32 bits of a double from an int. */
#define SET_HIGH_WORD_L(d,v) \
do { \
ieee_double_shape_type_little sh_u; \
sh_u.value = (d); \
sh_u.parts.msw = (v); \
(d) = sh_u.value; \
} while (0)
/* Set the more significant 32 bits of a double from an int. */
#define SET_HIGH_WORD_B(d,v) \
do { \
ieee_double_shape_type_big sh_u; \
sh_u.value = (d); \
sh_u.parts.msw = (v); \
(d) = sh_u.value; \
} while (0)
/* Macro wrappers. */
#define EXTRACT_WORDS(ix0,ix1,d) do { \
if (is_little_endian()) \
EXTRACT_WORDS_L(ix0,ix1,d); \
else \
EXTRACT_WORDS_B(ix0,ix1,d); \
} while (0)
#define INSERT_WORDS(d,ix0,ix1) do { \
if (is_little_endian()) \
INSERT_WORDS_L(d,ix0,ix1); \
else \
INSERT_WORDS_B(d,ix0,ix1); \
} while (0)
#define GET_HIGH_WORD(i,d) \
do { \
if (is_little_endian()) \
GET_HIGH_WORD_L(i,d); \
else \
GET_HIGH_WORD_B(i,d); \
} while (0)
#define SET_HIGH_WORD(d,v) \
do { \
if (is_little_endian()) \
SET_HIGH_WORD_L(d,v); \
else \
SET_HIGH_WORD_B(d,v); \
} while (0)
#define __HI(x) (is_little_endian() ? __HIL(x) : __HIB(x))
#define __LO(x) (is_little_endian() ? __LOL(x) : __LOB(x))
/*
* Attempt to get strict C99 semantics for assignment with non-C99 compilers.
*/
#if FLT_EVAL_METHOD == 0 || __GNUC__ == 0
#define STRICT_ASSIGN(type, lval, rval) ((lval) = (rval))
#else
#define STRICT_ASSIGN(type, lval, rval) do { \
volatile type __lval; \
\
if (sizeof(type) >= sizeof(long double)) \
(lval) = (rval); \
else { \
__lval = (rval); \
(lval) = __lval; \
} \
} while (0)
#endif
#ifdef __FDLIBM_STDC__
static const double huge = 1.0e300;
#else
static double huge = 1.0e300;
#endif
#ifdef __STDC__
static const double
#else
static double
#endif
tiny = 1.0e-300;
#ifdef __STDC__
static const double
#else
static double
#endif
one= 1.00000000000000000000e+00; /* 0x3FF00000, 0x00000000 */
#ifdef __STDC__
static const double
#else
static double
#endif
TWO52[2]={
4.50359962737049600000e+15, /* 0x43300000, 0x00000000 */
-4.50359962737049600000e+15, /* 0xC3300000, 0x00000000 */
};
static double freebsd_sqrt(double x);
static double freebsd_floor(double x);
static double freebsd_ceil(double x);
static double freebsd_fabs(double x);
static double freebsd_rint(double x);
static int freebsd_isnan(double x);
static double freebsd_sqrt(double x) /* wrapper sqrt */
{
double z;
int32_t sign = (int)0x80000000;
int32_t ix0,s0,q,m,t,i;
u_int32_t r,t1,s1,ix1,q1;
EXTRACT_WORDS(ix0,ix1,x);
/* take care of Inf and NaN */
if((ix0&0x7ff00000)==0x7ff00000) {
return x*x+x; /* sqrt(NaN)=NaN, sqrt(+inf)=+inf
sqrt(-inf)=sNaN */
}
/* take care of zero */
if(ix0<=0) {
if(((ix0&(~sign))|ix1)==0) return x;/* sqrt(+-0) = +-0 */
else if(ix0<0)
return (x-x)/(x-x); /* sqrt(-ve) = sNaN */
}
/* normalize x */
m = (ix0>>20);
if(m==0) { /* subnormal x */
while(ix0==0) {
m -= 21;
ix0 |= (ix1>>11); ix1 <<= 21;
}
for(i=0;(ix0&0x00100000)==0;i++) ix0<<=1;
m -= i-1;
ix0 |= (ix1>>(32-i));
ix1 <<= i;
}
m -= 1023; /* unbias exponent */
ix0 = (ix0&0x000fffff)|0x00100000;
if(m&1){ /* odd m, double x to make it even */
ix0 += ix0 + ((ix1&sign)>>31);
ix1 += ix1;
}
m >>= 1; /* m = [m/2] */
/* generate sqrt(x) bit by bit */
ix0 += ix0 + ((ix1&sign)>>31);
ix1 += ix1;
q = q1 = s0 = s1 = 0; /* [q,q1] = sqrt(x) */
r = 0x00200000; /* r = moving bit from right to left */
while(r!=0) {
t = s0+r;
if(t<=ix0) {
s0 = t+r;
ix0 -= t;
q += r;
}
ix0 += ix0 + ((ix1&sign)>>31);
ix1 += ix1;
r>>=1;
}
r = sign;
while(r!=0) {
t1 = s1+r;
t = s0;
if((t<ix0)||((t==ix0)&&(t1<=ix1))) {
s1 = t1+r;
if(((t1&sign)==sign)&&(s1&sign)==0) s0 += 1;
ix0 -= t;
if (ix1 < t1) ix0 -= 1;
ix1 -= t1;
q1 += r;
}
ix0 += ix0 + ((ix1&sign)>>31);
ix1 += ix1;
r>>=1;
}
/* use floating add to find out rounding direction */
if((ix0|ix1)!=0) {
z = one-tiny; /* trigger inexact flag */
if (z>=one) {
z = one+tiny;
if (q1==(u_int32_t)0xffffffff) { q1=0; q += 1;}
else if (z>one) {
if (q1==(u_int32_t)0xfffffffe) q+=1;
q1+=2;
} else
q1 += (q1&1);
}
}
ix0 = (q>>1)+0x3fe00000;
ix1 = q1>>1;
if ((q&1)==1) ix1 |= sign;
ix0 += (m <<20);
INSERT_WORDS(z,ix0,ix1);
return z;
}
static double freebsd_floor(double x)
{
int32_t i0,i1,j0;
u_int32_t i,j;
EXTRACT_WORDS(i0,i1,x);
j0 = ((i0>>20)&0x7ff)-0x3ff;
if(j0<20) {
if(j0<0) { /* raise inexact if x != 0 */
if(huge+x>0.0) {/* return 0*sign(x) if |x|<1 */
if(i0>=0) {i0=i1=0;}
else if(((i0&0x7fffffff)|i1)!=0)
{ i0=0xbff00000;i1=0;}
}
} else {
i = (0x000fffff)>>j0;
if(((i0&i)|i1)==0) return x; /* x is integral */
if(huge+x>0.0) { /* raise inexact flag */
if(i0<0) i0 += (0x00100000)>>j0;
i0 &= (~i); i1=0;
}
}
} else if (j0>51) {
if(j0==0x400) return x+x; /* inf or NaN */
else return x; /* x is integral */
} else {
i = ((u_int32_t)(0xffffffff))>>(j0-20);
if((i1&i)==0) return x; /* x is integral */
if(huge+x>0.0) { /* raise inexact flag */
if(i0<0) {
if(j0==20) i0+=1;
else {
j = i1+(1<<(52-j0));
if(j<i1) i0 +=1 ; /* got a carry */
i1=j;
}
}
i1 &= (~i);
}
}
INSERT_WORDS(x,i0,i1);
return x;
}
static double freebsd_ceil(double x)
{
int32_t i0,i1,j0;
u_int32_t i,j;
EXTRACT_WORDS(i0,i1,x);
j0 = ((i0>>20)&0x7ff)-0x3ff;
if(j0<20) {
if(j0<0) { /* raise inexact if x != 0 */
if(huge+x>0.0) {/* return 0*sign(x) if |x|<1 */
if(i0<0) {i0=0x80000000;i1=0;}
else if((i0|i1)!=0) { i0=0x3ff00000;i1=0;}
}
} else {
i = (0x000fffff)>>j0;
if(((i0&i)|i1)==0) return x; /* x is integral */
if(huge+x>0.0) { /* raise inexact flag */
if(i0>0) i0 += (0x00100000)>>j0;
i0 &= (~i); i1=0;
}
}
} else if (j0>51) {
if(j0==0x400) return x+x; /* inf or NaN */
else return x; /* x is integral */
} else {
i = ((u_int32_t)(0xffffffff))>>(j0-20);
if((i1&i)==0) return x; /* x is integral */
if(huge+x>0.0) { /* raise inexact flag */
if(i0>0) {
if(j0==20) i0+=1;
else {
j = i1 + (1<<(52-j0));
if(j<i1) i0+=1; /* got a carry */
i1 = j;
}
}
i1 &= (~i);
}
}
INSERT_WORDS(x,i0,i1);
return x;
}
static double freebsd_rint(double x)
{
int32_t i0,j0,sx;
u_int32_t i,i1;
double w,t;
EXTRACT_WORDS(i0,i1,x);
sx = (i0>>31)&1;
j0 = ((i0>>20)&0x7ff)-0x3ff;
if(j0<20) {
if(j0<0) {
if(((i0&0x7fffffff)|i1)==0) return x;
i1 |= (i0&0x0fffff);
i0 &= 0xfffe0000;
i0 |= ((i1|-i1)>>12)&0x80000;
SET_HIGH_WORD(x,i0);
STRICT_ASSIGN(double,w,TWO52[sx]+x);
t = w-TWO52[sx];
GET_HIGH_WORD(i0,t);
SET_HIGH_WORD(t,(i0&0x7fffffff)|(sx<<31));
return t;
} else {
i = (0x000fffff)>>j0;
if(((i0&i)|i1)==0) return x; /* x is integral */
i>>=1;
if(((i0&i)|i1)!=0) {
/*
* Some bit is set after the 0.5 bit. To avoid the
* possibility of errors from double rounding in
* w = TWO52[sx]+x, adjust the 0.25 bit to a lower
* guard bit. We do this for all j0<=51. The
* adjustment is trickiest for j0==18 and j0==19
* since then it spans the word boundary.
*/
if(j0==19) i1 = 0x40000000; else
if(j0==18) i1 = 0x80000000; else
i0 = (i0&(~i))|((0x20000)>>j0);
}
}
} else if (j0>51) {
if(j0==0x400) return x+x; /* inf or NaN */
else return x; /* x is integral */
} else {
i = ((u_int32_t)(0xffffffff))>>(j0-20);
if((i1&i)==0) return x; /* x is integral */
i>>=1;
if((i1&i)!=0) i1 = (i1&(~i))|((0x40000000)>>(j0-20));
}
INSERT_WORDS(x,i0,i1);
STRICT_ASSIGN(double,w,TWO52[sx]+x);
return w-TWO52[sx];
}
static int freebsd_isnan(double d)
{
if (is_little_endian()) {
IEEEd2bits_L u;
u.d = d;
return (u.bits.exp == 2047 && (u.bits.manl != 0 || u.bits.manh != 0));
}
else {
IEEEd2bits_B u;
u.d = d;
return (u.bits.exp == 2047 && (u.bits.manl != 0 || u.bits.manh != 0));
}
}
static double freebsd_fabs(double x)
{
u_int32_t high;
GET_HIGH_WORD(high,x);
SET_HIGH_WORD(x,high&0x7fffffff);
return x;
}
double sqrt(double x)
{
return freebsd_sqrt(x);
}
double floor(double x)
{
return freebsd_floor(x);
}
double ceil(double x)
{
return freebsd_ceil(x);
}
double fmin(double x, double y)
{
return x < y ? x : y;
}
double fmax(double x, double y)
{
return x > y ? x : y;
}
double rint(double x)
{
return freebsd_rint(x);
}
double fabs(double x)
{
return freebsd_fabs(x);
}
int isnan(double x)
{
return freebsd_isnan(x);
}
double trunc(double x)
{
return (x > 0) ? freebsd_floor(x) : freebsd_ceil(x);
}
int signbit(double x)
{
return ((__HI(x) & 0x80000000) >> 31);
}

6
core/shared-lib/platform/alios/bh_platform.c
View File

@ -25,3 +25,9 @@ char *bh_strdup(const char *s)
memcpy(s1, s, strlen(s) + 1);
return s1;
}
int bh_platform_init()
{
return 0;
}

28
core/shared-lib/platform/alios/bh_platform.h
View File

@ -43,8 +43,6 @@
/* Invalid thread tid */
#define INVALID_THREAD_ID NULL
#define INVALID_SEM_ID NULL
#define BH_WAIT_FOREVER AOS_WAIT_FOREVER
typedef uint64_t uint64;
@ -79,6 +77,18 @@ int snprintf(char *buffer, size_t count, const char *format, ...);
#define NULL ((void*)0)
#endif
/**
* Return the offset of the given field in the given type.
*
* @param Type the type containing the filed
* @param field the field in the type
*
* @return the offset of field in Type
*/
#ifndef offsetof
#define offsetof(Type, field) ((size_t)(&((Type *)0)->field))
#endif
extern void bh_assert_internal(int v, const char *file_name, int line_number, const char *expr_string);
#define bh_assert(expr) bh_assert_internal((int)(expr), __FILE__, __LINE__, # expr)
@ -86,5 +96,19 @@ extern int b_memcpy_s(void * s1, unsigned int s1max, const void * s2, unsigned i
extern int b_strcat_s(char * s1, size_t s1max, const char * s2);
extern int b_strcpy_s(char * s1, size_t s1max, const char * s2);
/* math functions */
double sqrt(double x);
double floor(double x);
double ceil(double x);
double fmin(double x, double y);
double fmax(double x, double y);
double rint(double x);
double fabs(double x);
double trunc(double x);
int signbit(double x);
int isnan(double x);
int bh_platform_init();
#endif /* end of _BH_PLATFORM_H */