projects
/
musl
/ blobdiff
commit
grep
author
committer
pickaxe
?
search:
re
summary
|
shortlog
|
log
|
commit
|
commitdiff
|
tree
raw
|
inline
| side by side
eliminate gcc dependency for testing char signedness in limits.h
[musl]
/
src
/
math
/
ilogb.c
diff --git
a/src/math/ilogb.c
b/src/math/ilogb.c
index
c5915a0
..
5a1819d
100644
(file)
--- a/
src/math/ilogb.c
+++ b/
src/math/ilogb.c
@@
-8,14
+8,17
@@
int ilogb(double x)
if (!e) {
u.bits <<= 12;
if (!e) {
u.bits <<= 12;
- if (u.bits == 0)
+ if (u.bits == 0) {
+ FORCE_EVAL(0/0.0f);
return FP_ILOGB0;
return FP_ILOGB0;
+ }
/* subnormal x */
/* subnormal x */
- // FIXME: scale up subnormals with a *0x1p53 or find top set bit with a better method
for (e = -0x3ff; u.bits < (uint64_t)1<<63; e--, u.bits<<=1);
return e;
}
for (e = -0x3ff; u.bits < (uint64_t)1<<63; e--, u.bits<<=1);
return e;
}
- if (e == 0x7ff)
+ if (e == 0x7ff) {
+ FORCE_EVAL(0/0.0f);
return u.bits<<12 ? FP_ILOGBNAN : INT_MAX;
return u.bits<<12 ? FP_ILOGBNAN : INT_MAX;
+ }
return e - 0x3ff;
}
return e - 0x3ff;
}