arch-arm: Exec Crypto instructions only if SIMD&FP enabled

We not only check for the presence of the relative FEAT_*,
we also check if AdvSIMD is enabled; we throw an undefined
instruction otherwise.

Change-Id: I1fd0cdc8057c5a7901774802dc076817f06c8e66
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>

src/arch/arm/isa/insts/crypto.isa

@@ -41,7 +41,7 @@ let {{
         if (!HaveExt(xc->tcBase(), %(extension)s)) {
             return std::make_shared<UndefinedInstruction>(machInst, true);
         }
-    '''
+    ''' + simdEnabledCheckCode
 
     header_output = ""
     decoder_output = ""

src/arch/arm/isa/insts/crypto64.isa

@@ -44,7 +44,8 @@ let {{
         if (!HaveExt(xc->tcBase(), %(extension)s)) {
             return std::make_shared<UndefinedInstruction>(machInst, true);
         }
-    '''
+    ''' + simd64EnabledCheckCode
+
     cryptoRegRegRegPrefix = '''
         Crypto crypto;
         RegVect srcReg1, srcReg2, destReg;