fixed a libgcc function not being on the crio's version
diff --git a/aos/crio/floatundidf.c b/aos/crio/floatundidf.c
new file mode 100644
index 0000000..356dd78
--- /dev/null
+++ b/aos/crio/floatundidf.c
@@ -0,0 +1,24 @@
+#include <stdint.h>
+
+// stolen from
+// http://llvm.org/svn/llvm-project/compiler-rt/trunk/lib/floatundidf.c@179666
+//
+// Lame hack to provide a libgcc function that the version on the crio doesn't
+// have.
+// TODO(brians): make this nicer and figure out which other ones we need
+
+double __floatundidf(unsigned long long a)
+{
+ static const double twop52 = 0x1.0p52;
+ static const double twop84 = 0x1.0p84;
+ static const double twop84_plus_twop52 = 0x1.00000001p84;
+
+ union { uint64_t x; double d; } high = { .d = twop84 };
+ union { uint64_t x; double d; } low = { .d = twop52 };
+
+ high.x |= a >> 32;
+ low.x |= a & 0x00000000ffffffffULL;
+
+ const double result = (high.d - twop84_plus_twop52) + low.d;
+ return result;
+}
diff --git a/frc971/crio/crio.gyp b/frc971/crio/crio.gyp
index b47921d..3f76f44 100644
--- a/frc971/crio/crio.gyp
+++ b/frc971/crio/crio.gyp
@@ -6,6 +6,7 @@
'type': 'static_library',
'sources': [
'<!@(find <(AOS)/externals/WPILib/WPILib/ -name *.cpp)',
+ '<(AOS)/crio/floatundidf.c',
],
'dependencies': [
'<(EXTERNALS):WPILib',