| Index: src/s390/assembler-s390.h | 
| diff --git a/src/s390/assembler-s390.h b/src/s390/assembler-s390.h | 
| index 46e6c4cb892a2bc8bb7c2a8c88490790da5a9bce..c2897fe9e3156cb864135936cdd490c850af665d 100644 | 
| --- a/src/s390/assembler-s390.h | 
| +++ b/src/s390/assembler-s390.h | 
| @@ -187,6 +187,7 @@ const Register kRootRegister = r10;   // Roots array pointer. | 
| const Register cp = r13;              // JavaScript context pointer. | 
|  | 
| static const bool kSimpleFPAliasing = true; | 
| +static const bool kSimdMaskRegisters = false; | 
|  | 
| // Double word FP register. | 
| struct DoubleRegister { | 
|  |