test SVP64 major opcode, start checking if it is EXT001 soon

[soc.git] / src / soc / decoder / selectable_int.py

diff --git a/src/soc/decoder/selectable_int.py b/src/soc/decoder/selectable_int.py
index 700a620643f6732f6ff0a3e6a0f0b345cc091f96..53e85036d444619d94f28e03d6f42de6dfcb8c76 100644 (file)
--- a/src/soc/decoder/selectable_int.py
+++ b/src/soc/decoder/selectable_int.py
@@ -114,6 +114,13 @@ class FieldSelectableInt:
     def __repr__(self):
         return "FieldSelectableInt(si=%s, br=%s)" % (self.si, self.br)
 
+    def asint(self, msb0=False):
+        res = 0
+        brlen = len(self.br)
+        for i, key in enumerate(self.br):
+            res |= self.si[key].value << ((brlen-i-1) if msb0 else i)
+        return res
+
 
 class FieldSelectableIntTestCase(unittest.TestCase):
     def test_arith(self):
@@ -171,6 +178,7 @@ class SelectableInt:
         mask = (1 << bits) - 1
         self.value = value & mask
         self.bits = bits
+        self.overflow = (value & ~mask) != 0
 
     def eq(self, b):
         self.value = b.value
@@ -254,7 +262,9 @@ class SelectableInt:
         return SelectableInt(~self.value, self.bits)
 
     def __neg__(self):
-        return SelectableInt(~self.value + 1, self.bits)
+        res = SelectableInt((~self.value) + 1, self.bits)
+        print ("neg", hex(self.value), hex(res.value))
+        return res
 
     def __lshift__(self, b):
         b = check_extsign(self, b)
@@ -267,6 +277,7 @@ class SelectableInt:
     def __getitem__(self, key):
         if isinstance(key, SelectableInt):
             key = key.value
+        print("getitem", key, self.bits, hex(self.value))
         if isinstance(key, int):
             assert key < self.bits, "key %d accessing %d" % (key, self.bits)
             assert key >= 0
@@ -286,7 +297,7 @@ class SelectableInt:
             start = self.bits - key.stop
 
             bits = stop - start
-            #print ("__getitem__ slice num bits", bits)
+            #print ("__getitem__ slice num bits", start, stop, bits)
             mask = (1 << bits) - 1
             value = (self.value >> start) & mask
             return SelectableInt(value, bits)
@@ -294,6 +305,7 @@ class SelectableInt:
     def __setitem__(self, key, value):
         if isinstance(key, SelectableInt):
             key = key.value
+        print("setitem", key, self.bits, hex(self.value))
         if isinstance(key, int):
             assert key < self.bits
             assert key >= 0