tinycc/win32/lib/crt1.c
grischka 73faaea227 i386-gen: preserve fp control word in gen_cvt_ftoi
- Use runtime function for conversion
- Also initialize fp with tcc -run on windows

This fixes a bug where
  double x = 1.0;
  double y = 1.0000000000000001;
  double z = x < y ? 0 : sqrt (x*x - y*y);
caused a bad sqrt because rounding precision for the x < y comparison
was different to the one used within the sqrt function.

This also fixes a bug where
  printf("%d, %d", (int)pow(10, 2), (int)pow(10, 2));
would print
  100, 99

Unrelated:
  win32: document relative include & lib lookup
  win32: normalize_slashes: do not mirror silly gcc behavior
  This reverts part of commit 8a81f9e103
  winapi: add missing WINAPI decl. for some functions
2013-08-28 22:55:05 +02:00

41 lines
864 B
C

// =============================================
// crt1.c
#include <stdlib.h>
#define __UNKNOWN_APP 0
#define __CONSOLE_APP 1
#define __GUI_APP 2
void __set_app_type(int);
void _controlfp(unsigned a, unsigned b);
typedef struct
{
int newmode;
} _startupinfo;
void __getmainargs(int *pargc, char ***pargv, char ***penv, int globb, _startupinfo*);
int main(int argc, char **argv, char **env);
int _start(void)
{
__TRY__
int argc; char **argv; char **env; int ret;
_startupinfo start_info = {0};
_controlfp(0x10000, 0x30000);
__set_app_type(__CONSOLE_APP);
__getmainargs(&argc, &argv, &env, 0, &start_info);
ret = main(argc, argv, env);
exit(ret);
}
int _runmain(int argc, char **argv)
{
_controlfp(0x10000, 0x30000);
return main(argc, argv, NULL);
}
// =============================================