Merge release-4-6 into master

[alexxy/gromacs.git] / src / gromacs / mdlib / nbnxn_cuda / nbnxn_cuda_kernel_utils.cuh

diff --git a/src/gromacs/mdlib/nbnxn_cuda/nbnxn_cuda_kernel_utils.cuh b/src/gromacs/mdlib/nbnxn_cuda/nbnxn_cuda_kernel_utils.cuh
index 5233ddffc37abb21d83feb90db9adc2ffa48a705..610be4571d4a6504d9991f9761cdadd8c783f33c 100644 (file)
--- a/src/gromacs/mdlib/nbnxn_cuda/nbnxn_cuda_kernel_utils.cuh
+++ b/src/gromacs/mdlib/nbnxn_cuda/nbnxn_cuda_kernel_utils.cuh
@@ -32,6 +32,12 @@
  * And Hey:
  * Gallium Rubidium Oxygen Manganese Argon Carbon Silicon
  */
+
+/* Note that floating-point constants in CUDA code should be suffixed
+ * with f (e.g. 0.5f), to stop the compiler producing intermediate
+ * code that is in double precision.
+ */
+
 #include "../../gmxlib/cuda_tools/vectype_ops.cuh"
 
 #ifndef NBNXN_CUDA_KERNEL_UTILS_CUH