add mirror copy of FU_Regs Dep Matrix, names changed, adapted to LD/ST

[soc.git] / src / scoreboard / mem_select.py

diff --git a/src/scoreboard/mem_select.py b/src/scoreboard/mem_select.py
new file mode 100644 (file)
index 0000000..627d7d1
--- /dev/null
+++ b/src/scoreboard/mem_select.py
@@ -0,0 +1,20 @@
+from nmigen import Elaboratable, Module, Signal
+
+
+class Mem_Rsv(Elaboratable):
+    """ these are allocated per-Register (vertically),
+        and are each of length fu_count
+    """
+    def __init__(self, fu_count):
+        self.fu_count = fu_count
+        self.ld_rsel_i = Signal(fu_count, reset_less=True)
+        self.st_rsel_i = Signal(fu_count, reset_less=True)
+        self.ld_rsel_o = Signal(reset_less=True)
+        self.st_rsel_o = Signal(reset_less=True)
+
+    def elaborate(self, platform):
+        m = Module()
+        m.d.comb += self.ld_rsel_o.eq(self.ld_rsel_i.bool())
+        m.d.comb += self.st_rsel_o.eq(self.st_rsel_i.bool())
+        return m
+