OSO/TinyCC
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

partial revert of the commit 4ad186c5ef

Browse Source 
A test program:

    /* result of the new version inroduced in 4ad186c5ef: t2a = 44100312 */
    #include<stdio.h>
    int main() {
	int t1 = 176401255;
	float f = 0.25f;
	int t2a = (int)(t1 * f); // must be 44100313
	int t2b = (int)(t1 * (float)0.25f);
	printf("t2a=%d t2b=%d \n",t2a,t2b);
	return 0;
    }
This commit is contained in:
seyko
2015-03-04 16:25:51 +03:00
parent bfb7b0d959
commit 664c19ad5e
3 changed files with 41 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
lib/libtcc1.c
View File

@ -480,6 +480,20 @@ long long __ashldi3(long long a, int b)
#endif
}
#ifndef COMMIT_4ad186c5ef61_IS_FIXED
long long __tcc_cvt_ftol(long double x)
{
unsigned c0, c1;
long long ret;
__asm__ __volatile__ ("fnstcw %0" : "=m" (c0));
c1 = c0 | 0x0C00;
__asm__ __volatile__ ("fldcw %0" : : "m" (c1));
__asm__ __volatile__ ("fistpll %0" : "=m" (ret));
__asm__ __volatile__ ("fldcw %0" : : "m" (c0));
return ret;
}
#endif
#endif /* !__x86_64__ */
/* XXX: fix tcc's code generator to do this instead */