view include/SDL_config_os2.h @ 2752:edd2839b36f7

http://sources.redhat.com/ml/newlib/2002/msg00230.html Stephen L Moshier wrote: > > pow(x,y) returns 0 when x is very close to -1.0 and y is very large. > The following test program prints > > pow(1.0000000000000002e+00 4.5035996273704970e+15) = 2.7182818284590455e+00 > pow(-1.0000000000000002e+00 4.5035996273704970e+15) =0.0000000000000000e+00 > pow(9.9999999999999978e-01 4.5035996273704970e+15) = 3.6787944117144222e-01 > pow(-9.9999999999999978e-01 4.5035996273704970e+15) = 0.0000000000000000e+00 > > which is incorrect for the negative arguments raised to an odd integer > power. > > ----- > double pow (double, double); > > int > main () > { > double x, y, z; > > x = 1.0 + pow (2.0, -52.0); > y = 1.0 + pow (2.0, 52.0); > z = pow (x, y); > printf ("pow(%.16e %.16e) = %.16e\n", x, y, z); > x = -x; > z = pow (x, y); > printf ("pow(%.16e %.16e) = %.16e\n", x, y, z); > x = 1.0 - pow (2.0, -52.0); > z = pow (x, y); > printf ("pow(%.16e %.16e) = %.16e\n", x, y, z); > x = -x; > z = pow (x, y); > printf ("pow(%.16e %.16e) = %.16e\n", x, y, z); > } > ----- > > Here is a patch for newlib/libm/math/epow.c: Patch checked in and duplicated for ef_pow.c. Thanks. -- Jeff J.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 15 Sep 2008 04:31:30 +0000
parents 0906692aa6a4
children 99210400e8b9
line wrap: on
line source

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2006 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org
*/

#ifndef _SDL_config_os2_h
#define _SDL_config_os2_h

#include "SDL_platform.h"

/* This is a set of defines to configure the SDL features */

typedef signed char int8_t;
typedef unsigned char uint8_t;
typedef signed short int16_t;
typedef unsigned short uint16_t;
typedef signed int int32_t;
typedef unsigned int uint32_t;
typedef unsigned int size_t;
typedef unsigned long uintptr_t;
typedef signed long long int64_t;
typedef unsigned long long uint64_t;

#define SDL_HAS_64BIT_TYPE	1

/* Use Watcom's LIBC */
#define HAVE_LIBC 1

/* Useful headers */
#define HAVE_SYS_TYPES_H 1
#define HAVE_STDIO_H 1
#define STDC_HEADERS 1
#define HAVE_STDLIB_H 1
#define HAVE_STDARG_H 1
#define HAVE_MALLOC_H 1
#define HAVE_MEMORY_H 1
#define HAVE_STRING_H 1
#define HAVE_STRINGS_H 1
#define HAVE_INTTYPES_H 1
#define HAVE_STDINT_H 1
#define HAVE_CTYPE_H 1
#define HAVE_MATH_H 1
#define HAVE_SIGNAL_H 1

/* C library functions */
#define HAVE_MALLOC 1
#define HAVE_CALLOC 1
#define HAVE_REALLOC 1
#define HAVE_FREE 1
#define HAVE_ALLOCA 1
#define HAVE_GETENV 1
#define HAVE_PUTENV 1
#define HAVE_UNSETENV 1
#define HAVE_QSORT 1
#define HAVE_ABS 1
#define HAVE_BCOPY 1
#define HAVE_MEMSET 1
#define HAVE_MEMCPY 1
#define HAVE_MEMMOVE 1
#define HAVE_MEMCMP 1
#define HAVE_STRLEN 1
#define HAVE_STRLCPY 1
#define HAVE_STRLCAT 1
#define HAVE_STRDUP 1
#define HAVE__STRREV 1
#define HAVE__STRUPR 1
#define HAVE__STRLWR 1
#define HAVE_INDEX 1
#define HAVE_RINDEX 1
#define HAVE_STRCHR 1
#define HAVE_STRRCHR 1
#define HAVE_STRSTR 1
#define HAVE_ITOA 1
#define HAVE__LTOA 1
#define HAVE__UITOA 1
#define HAVE__ULTOA 1
#define HAVE_STRTOL 1
#define HAVE__I64TOA 1
#define HAVE__UI64TOA 1
#define HAVE_STRTOLL 1
#define HAVE_STRTOD 1
#define HAVE_ATOI 1
#define HAVE_ATOF 1
#define HAVE_STRCMP 1
#define HAVE_STRNCMP 1
#define HAVE_STRICMP 1
#define HAVE_STRCASECMP 1
#define HAVE_SSCANF 1
#define HAVE_SNPRINTF 1
#define HAVE_VSNPRINTF 1
#define HAVE_SETJMP 1
#define HAVE_CLOCK_GETTIME 1

/* Enable various audio drivers */
#define SDL_AUDIO_DRIVER_DART	1
#define SDL_AUDIO_DRIVER_DISK	1
#define SDL_AUDIO_DRIVER_DUMMY	1

/* Enable various cdrom drivers */
#define SDL_CDROM_OS2	1

/* Enable various input drivers */
#define SDL_JOYSTICK_OS2	1
#define SDL_HAPTIC_DUMMY	1

/* Enable various shared object loading systems */
#define SDL_LOADSO_OS2	1

/* Enable various threading systems */
#define SDL_THREAD_OS2	1

/* Enable various timer systems */
#define SDL_TIMER_OS2	1

/* Enable various video drivers */
#define SDL_VIDEO_DRIVER_DUMMY	1
#define SDL_VIDEO_DRIVER_OS2FS	1

/* Enable OpenGL support */
/* Nothing here yet for OS/2... :( */

/* Enable assembly routines where available */
#define SDL_ASSEMBLY_ROUTINES	1

#endif /* _SDL_config_os2_h */