Allow the formal engine to perform a same-cycle result in the ALU

[soc.git] / src / soc / fu / alu / pipe_data.py

diff --git a/src/soc/fu/alu/pipe_data.py b/src/soc/fu/alu/pipe_data.py
index 5b9766e295397fb74c94ecf4a086e6868605599c..572ec9a6bcd18c22202f4a100531e6f843975889 100644 (file)
--- a/src/soc/fu/alu/pipe_data.py
+++ b/src/soc/fu/alu/pipe_data.py
@@ -1,70 +1,38 @@
-from nmigen import Signal, Const, Cat
 from soc.fu.alu.alu_input_record import CompALUOpSubset
-from soc.fu.pipe_data import IntegerData, CommonPipeSpec
-from ieee754.fpcommon.getop import FPPipeContext
-from soc.decoder.power_decoder2 import Data
+from soc.fu.pipe_data import FUBaseData, CommonPipeSpec
 
 
-class ALUInputData(IntegerData):
-    regspec = [('INT', 'ra', '0:63'),
-               ('INT', 'rb', '0:63'),
-               ('XER', 'xer_so', '32'),
-               ('XER', 'xer_ca', '34,45')]
+class ALUInputData(FUBaseData):
     def __init__(self, pspec):
-        super().__init__(pspec)
-        self.ra = Signal(64, reset_less=True) # RA
-        self.rb = Signal(64, reset_less=True) # RB/immediate
-        self.xer_so = Signal(reset_less=True) # XER bit 32: SO
-        self.xer_ca = Signal(2, reset_less=True) # XER bit 34/45: CA/CA32
+        super().__init__(pspec, False)
         # convenience
         self.a, self.b = self.ra, self.rb
 
-    def __iter__(self):
-        yield from super().__iter__()
-        yield self.ra
-        yield self.rb
-        yield self.xer_ca
-        yield self.xer_so
+    @property
+    def regspec(self):
+        return [('INT', 'ra', self.intrange),  # RA
+               ('INT', 'rb', self.intrange),  # RB/immediate
+               ('XER', 'xer_so', '32'),  # XER bit 32: SO
+               ('XER', 'xer_ca', '34,45')]  # XER bit 34/45: CA/CA32
 
-    def eq(self, i):
-        lst = super().eq(i)
-        return lst + [self.ra.eq(i.ra), self.rb.eq(i.rb),
-                      self.xer_ca.eq(i.xer_ca),
-                      self.xer_so.eq(i.xer_so)]
 
 
-class ALUOutputData(IntegerData):
-    regspec = [('INT', 'o', '0:63'),
-               ('CR', 'cr_a', '0:3'),
-               ('XER', 'xer_ca', '34,45'),
-               ('XER', 'xer_ov', '33,44'),
-               ('XER', 'xer_so', '32')]
+class ALUOutputData(FUBaseData):
     def __init__(self, pspec):
-        super().__init__(pspec)
-        self.o = Data(64, name="stage_o")
-        self.cr_a = Data(4, name="cr_a")
-        self.xer_ca = Data(2, name="xer_co") # bit0: ca, bit1: ca32
-        self.xer_ov = Data(2, name="xer_ov") # bit0: ov, bit1: ov32
-        self.xer_so = Data(1, name="xer_so")
+        super().__init__(pspec, True)
         # convenience
         self.cr0 = self.cr_a
 
-    def __iter__(self):
-        yield from super().__iter__()
-        yield self.o
-        yield self.xer_ca
-        yield self.cr_a
-        yield self.xer_ov
-        yield self.xer_so
+    @property
+    def regspec(self):
+        return [('INT', 'o', self.intrange),
+               ('CR', 'cr_a', '0:3'),
+               ('XER', 'xer_ca', '34,45'),  # bit0: ca, bit1: ca32
+               ('XER', 'xer_ov', '33,44'),  # bit0: ov, bit1: ov32
+               ('XER', 'xer_so', '32')]
 
-    def eq(self, i):
-        lst = super().eq(i)
-        return lst + [self.o.eq(i.o),
-                      self.xer_ca.eq(i.xer_ca),
-                      self.cr_a.eq(i.cr_a),
-                      self.xer_ov.eq(i.xer_ov), self.xer_so.eq(i.xer_so)]
 
 
 class ALUPipeSpec(CommonPipeSpec):
-    regspec = (ALUInputData.regspec, ALUOutputData.regspec)
     opsubsetkls = CompALUOpSubset
+    regspecklses = (ALUInputData, ALUOutputData)