glibc/sysdeps/ieee754/ldbl-opt/w_ilogbl.c

#include <math_ldbl_opt.h>
#undef weak_alias
#define weak_alias(n,a)
#include <math/w_ilogbl.c>
long_double_symbol (libm, __ilogbl, ilogbl);
Fix ilogb exception and errno (bug 6794) [BZ #6794] Following Joseph comments about bug 6794, here is a proposed fix. It turned out to be a large fix mainly because I had to move some file along to follow libm files/names conventions. Basically I have added wrappers (w_ilogb.c, w_ilogbf.c, w_ilogbl.c) that now calls the symbol '__ieee754_ilogb'. The wrappers checks for '__ieee754_ilogb' output and set the errno and raise exceptions as expected. The '__ieee754_ilogb' is implemented in sysdeps. I have moved the 's_ilogb[f\|l]' files to e_ilogb[f\|l] and renamed the '__ilogb[f\|l]' to '__ieee754_ilogb[f\|l]'. I also found out a bug in i386 and x86-64 assembly coded ilogb implementation where it raises a FE_DIVBYZERO when argument is '0.0'. I corrected this issue as well. Finally I added the errno and FE_INVALID tests for 0.0, NaN and +-InF argument. Tested on i386, x86-64, ppc32 and ppc64. 2012-04-11 19:30:13 +00:00			`#include <math_ldbl_opt.h>`
			`#undef weak_alias`
			`#define weak_alias(n,a)`
			`#include <math/w_ilogbl.c>`
			`long_double_symbol (libm, __ilogbl, ilogbl);`