fluencelabs/musl
1
0
Fork 0
mirror of https://github.com/fluencelabs/musl synced 2025-06-30 15:11:55 +00:00
Code Issues Projects Releases Wiki Activity

support ld80 pseudo-denormal invalid bit patterns; treat them as nan

Browse Source 
this is silly, but it makes apps that read binary junk and interpret
it as ld80 "safer", and it gets gnulib to stop replacing printf...
This commit is contained in:
Rich Felker
2012-06-20 15:15:10 -04:00
parent c21a19d5a5
commit fad231b960
1 changed files with 5 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
src/math/__fpclassifyl.c
View File

@ -7,8 +7,11 @@ int __fpclassifyl(long double x)
{ {
union ldshape u = { x }; union ldshape u = { x };
int e = u.bits.exp; int e = u.bits.exp;
if (!e) if (!e) {
return u.bits.m ? FP_SUBNORMAL : FP_ZERO; if (u.bits.m >> 63) return FP_NAN;
else if (u.bits.m) return FP_SUBNORMAL;
else return FP_ZERO;
}
if (e == 0x7fff) if (e == 0x7fff)
return u.bits.m & (uint64_t)-1>>1 ? FP_NAN : FP_INFINITE; return u.bits.m & (uint64_t)-1>>1 ? FP_NAN : FP_INFINITE;
return u.bits.m & (uint64_t)1<<63 ? FP_NORMAL : FP_NAN; return u.bits.m & (uint64_t)1<<63 ? FP_NORMAL : FP_NAN;