unittests: Support skipping unit tests based on host feature support

For these unit tests we no longer need to put them in the disabled tests
file. Instead it will be skipped if the host doesn't support the feature
required.

Scripts/json_config_parse.py

@@ -63,8 +63,15 @@ class Mode(Flag) :
     MODE_64   = 1
 
 class HostFeatures(Flag) :
-    ANY      = 0
-    AVX_ONLY = 1
+    FEATURE_ANY    = 0
+    FEATURE_3DNOW  = (1 << 0)
+    FEATURE_SSE4A  = (1 << 1)
+    FEATURE_AVX    = (1 << 2)
+    FEATURE_RAND   = (1 << 3)
+    FEATURE_SHA    = (1 << 4)
+    FEATURE_CLZERO = (1 << 5)
+    FEATURE_BMI1   = (1 << 6)
+    FEATURE_BMI2   = (1 << 7)
 
 RegStringLookup = {
     "NONE":  Regs.REG_NONE,
@@ -128,8 +135,14 @@ ModeStringLookup = {
 }
 
 HostFeaturesLookup = {
-    "ANY" : HostFeatures.ANY,
-    "AVX" : HostFeatures.AVX_ONLY,
+    "3DNOW"  : HostFeatures.FEATURE_3DNOW,
+    "SSE4A"  : HostFeatures.FEATURE_SSE4A,
+    "AVX"    : HostFeatures.FEATURE_AVX,
+    "RAND"   : HostFeatures.FEATURE_RAND,
+    "SHA"    : HostFeatures.FEATURE_SHA,
+    "CLZERO" : HostFeatures.FEATURE_CLZERO,
+    "BMI1"   : HostFeatures.FEATURE_BMI1,
+    "BMI2"   : HostFeatures.FEATURE_BMI2,
 }
 
 def parse_hexstring(s):
@@ -152,7 +165,7 @@ def parse_json(json_text, output_file):
     OptionIgnore = Regs.REG_NONE
     OptionABI = ABI.ABI_SYSTEMV
     OptionMode = Mode.MODE_64
-    OptionHostFeatures = HostFeatures.ANY
+    OptionHostFeatures = HostFeatures.FEATURE_ANY
     OptionStackSize = 4096
     OptionEntryPoint = 1
     OptionRegData = {}
@@ -208,10 +221,15 @@ def parse_json(json_text, output_file):
 
     if ("HOSTFEATURES" in json_object):
         data = json_object["HOSTFEATURES"]
-        data = data.upper()
-        if not (data in HostFeaturesLookup):
-            sys.exit("Invalid host feature")
-        OptionHostFeatures = HostFeaturesLookup[data]
+        if not (type(data) is list):
+            sys.exit("HostFeatures value must be list of features")
+
+        for data_key in data:
+            data_key = data_key.upper()
+            if not (data_key in HostFeaturesLookup):
+                sys.exit("Invalid host feature")
+
+            OptionHostFeatures |= HostFeaturesLookup[data_key]
 
     if ("STACKSIZE" in json_object):
         data = json_object["STACKSIZE"]