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-rw-r--r--lib9/isnan-posix.c15
-rw-r--r--lib9/mkfile-Nt1
-rw-r--r--lib9/mkfile-Posix1
3 files changed, 17 insertions, 0 deletions
diff --git a/lib9/isnan-posix.c b/lib9/isnan-posix.c
new file mode 100644
index 00000000..ece5c0d8
--- /dev/null
+++ b/lib9/isnan-posix.c
@@ -0,0 +1,15 @@
+#include <lib9.h>
+
+int
+isNaN(double d)
+{
+ return isnan(d);
+}
+
+int
+isInf(double d, int sign)
+{
+ if(sign < 0)
+ return isinf(d) < 0;
+ return isinf(d);
+}
diff --git a/lib9/mkfile-Nt b/lib9/mkfile-Nt
index f264c479..3bb2a380 100644
--- a/lib9/mkfile-Nt
+++ b/lib9/mkfile-Nt
@@ -7,3 +7,4 @@ TARGFILES=\
setbinmode-Nt.$O\
lock-Nt-386.$O\
pread-Nt.$O\
+ isnan-posix.$O\
diff --git a/lib9/mkfile-Posix b/lib9/mkfile-Posix
index 085c665b..7f833067 100644
--- a/lib9/mkfile-Posix
+++ b/lib9/mkfile-Posix
@@ -6,3 +6,4 @@ TARGFILES=\
getcallerpc-$SYSTARG-$OBJTYPE.$O\
getwd-posix.$O\
sbrk-posix.$O\
+ isnan-posix.$O\