Merge branch release-2016

[alexxy/gromacs.git] / cmake / gmxManageSimd.cmake

diff --git a/cmake/gmxManageSimd.cmake b/cmake/gmxManageSimd.cmake
index 64661de6f9e07e8eb1e49fb36e109a49e28891cb..84045516d6607e5a1f08920553b4066cfaf1b1e5 100644 (file)
--- a/cmake/gmxManageSimd.cmake
+++ b/cmake/gmxManageSimd.cmake
@@ -353,6 +353,10 @@ elseif(GMX_SIMD_ACTIVE STREQUAL "AVX_512_KNL")
 
 elseif(GMX_SIMD_ACTIVE STREQUAL "ARM_NEON")
 
+    if (GMX_DOUBLE)
+        message(FATAL_ERROR "ARM_NEON SIMD support is not available for a double precision build because the architecture lacks double-precision support")
+    endif()
+
     gmx_find_flags(
         "#include<arm_neon.h>
          int main(){float32x4_t x=vdupq_n_f32(0.5);x=vmlaq_f32(x,x,x);return vgetq_lane_f32(x,0)>0;}"