* lib/isnan.c (FUNC): Compute run-time NaN under ICC as well.
Signed-off-by: Eric Blake <ebl...@redhat.com>
---
On a Linux x86_64 system where isnan() fails to recognize pseudo-nan
long doubles, ICC 10.1 fails to compile isnan.c with:
../../gllib/isnan.c(133): error: floating-point operation result is out of range
static memory_double nan = { L_(0.0) / L_(0.0) };
^
../../gllib/isnan.c(134): error: floating-point operation result is out of range
static DOUBLE plus_inf = L_(1.0) / L_(0.0);
^
../../gllib/isnan.c(135): error: floating-point operation result is out of range
static DOUBLE minus_inf = -L_(1.0) / L_(0.0);
ChangeLog | 5 ++++-
lib/isnan.c | 4 ++--
2 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/ChangeLog b/ChangeLog
index 68c0a75..7f1a824 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,7 @@
-2010-11-03 Eric Blake <ebl...@redhat.com>
+2010-11-04 Eric Blake <ebl...@redhat.com>
+
+ isnan: work around icc bug
+ * lib/isnan.c (FUNC): Compute run-time NaN under ICC as well.
tests: fix compiler warnings
* tests/test-getopt.h (test_getopt): Fix condition.
diff --git a/lib/isnan.c b/lib/isnan.c
index ddad7fb..d183ac4 100644
--- a/lib/isnan.c
+++ b/lib/isnan.c
@@ -118,8 +118,8 @@ FUNC (DOUBLE x)
/* Be careful to not do any floating-point operation on x, such as x == x,
because x may be a signaling NaN. */
# if defined __TINYC__ || defined __SUNPRO_C || defined __DECC \
- || (defined __sgi && !defined __GNUC__)
- /* The Sun C 5.0 compilers and the Compaq (ex-DEC) 6.4 compilers don't
+ || (defined __sgi && !defined __GNUC__) || defined __ICC
+ /* The Sun C 5.0, Intel ICC 10.0, and Compaq (ex-DEC) 6.4 compilers don't
recognize the initializers as constant expressions. The latter compiler
also fails when constant-folding 0.0 / 0.0 even when constant-folding is
not required. The SGI MIPSpro C compiler complains about "floating-point
--
1.7.3.2
