From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Sun, 19 Apr 2020 10:32:41 +0000 (+0100)
Subject: convert BranchALU to temporary conformant API
X-Git-Tag: div_pipeline~1425
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=e3f03c0ff4b71c7500b5c997d183d0b931d22853;p=soc.git

convert BranchALU to temporary conformant API
---

diff --git a/src/soc/experiment/alu_hier.py b/src/soc/experiment/alu_hier.py
index 2e9a10dd..e3dfe3c6 100644
--- a/src/soc/experiment/alu_hier.py
+++ b/src/soc/experiment/alu_hier.py
@@ -273,9 +273,13 @@ class BranchALU(Elaboratable):
         self.n_valid_o = Signal()
         self.counter   = Signal(4)
         self.op  = Signal(2)
-        self.a   = Signal(width)
-        self.b   = Signal(width)
-        self.o   = Signal(width)
+        i = []
+        i.append(Signal(width, name="i1"))
+        i.append(Signal(width, name="i2"))
+        self.i = Array(i)
+        self.a, self.b = i[0], i[1]
+        self.out = Array([Signal(width)])
+        self.o = self.out[0]
         self.width = width
 
     def elaborate(self, platform):
diff --git a/src/soc/experiment/score6600_multi.py b/src/soc/experiment/score6600_multi.py
index b24b2fa3..53d27ee9 100644
--- a/src/soc/experiment/score6600_multi.py
+++ b/src/soc/experiment/score6600_multi.py
@@ -142,7 +142,6 @@ class CompUnitsBase(Elaboratable):
             godie_l.append(alu.go_die_i)
             print (alu, "rel", alu.req_rel_o, alu.rd_rel_o)
             if isinstance(alu, LDSTCompUnit) or \
-               isinstance(alu, CompUnitBR) or \
                isinstance(alu, ComputationUnitNoDelay):
                 if isinstance(alu, CompUnitsBase):
                     ulen = alu.n_units
@@ -322,13 +321,14 @@ class CompUnitBR(CompUnitsBase):
         self.opwid = opwid
 
         # inputs
+        self.op = CompALUOpSubset("cua_i") # TODO - CompALUBranchSubset
         self.oper_i = Signal(opwid, reset_less=True)
         self.imm_i = Signal(rwid, reset_less=True)
 
         # Branch ALU and CU
         self.bgt = BranchALU(rwid)
         aluopwid = 3  # extra bit for immediate mode
-        self.br1 = ComputationUnitNoDelay(rwid, self.bgt)
+        self.br1 = MultiCompUnit(rwid, self.bgt)
         CompUnitsBase.__init__(self, rwid, [self.br1])
 
     def elaborate(self, platform):
@@ -337,6 +337,7 @@ class CompUnitBR(CompUnitsBase):
 
         # hand the same operation to all units
         for alu in self.units:
+            #comb += alu.oper_i.eq(self.op) # TODO
             comb += alu.oper_i.eq(self.oper_i)
             #comb += alu.imm_i.eq(self.imm_i)