X-Git-Url: http://biod.pnpi.spb.ru/gitweb/?p=alexxy%2Fgromacs.git;a=blobdiff_plain;f=src%2Fgromacs%2Fgpu_utils%2Focl_compiler.cpp;fp=src%2Fgromacs%2Fgpu_utils%2Focl_compiler.cpp;h=64e925b885036f74e01a9dd2049f2d790cbb5a9a;hp=5f826e5e0ab334dffe87b54d5a26e7ddb4b2ca96;hb=5a6c3b3a5ada87dcc7ede0dc79f7e925376745b5;hpb=31ad1552d0e654c8d59363d5e94fb8a573e4d69b

diff --git a/src/gromacs/gpu_utils/ocl_compiler.cpp b/src/gromacs/gpu_utils/ocl_compiler.cpp
index 5f826e5e0a..64e925b885 100644
--- a/src/gromacs/gpu_utils/ocl_compiler.cpp
+++ b/src/gromacs/gpu_utils/ocl_compiler.cpp
@@ -169,8 +169,9 @@ static std::string selectCompilerOptions(DeviceVendor deviceVendor)
         compilerOptions += " -cl-opt-disable";
     }
 
-    /* Fastmath improves performance on all supported arch */
-    if (getenv("GMX_OCL_DISABLE_FASTMATH") == nullptr)
+    /* Fastmath improves performance on all supported arch,
+     * but is tends to cause problems on Intel (Issue #3898) */
+    if ((deviceVendor != DeviceVendor::Intel) && (getenv("GMX_OCL_DISABLE_FASTMATH") == nullptr))
     {
         compilerOptions += " -cl-fast-relaxed-math";