From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Sat, 4 May 2019 06:28:29 +0000 (+0100)
Subject: add function unit picker vector
X-Git-Tag: ls180-24jan2020~1037
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=5915b43f49e91c6cb55ec5a0274ff2f9db12a031;p=ieee754fpu.git

add function unit picker vector
---

diff --git a/src/scoreboard/fu_picker_vec.py b/src/scoreboard/fu_picker_vec.py
new file mode 100644
index 00000000..fd44c45f
--- /dev/null
+++ b/src/scoreboard/fu_picker_vec.py
@@ -0,0 +1,21 @@
+from nmigen import Elaboratable, Module, Signal, Cat
+
+
+class FU_Pick_Vec(Elaboratable):
+    """ these are allocated per-FU (horizontally),
+        and are of length fu_row_n
+    """
+    def __init__(self, fu_row_n):
+        self.fu_row_n = fu_row_n
+        self.rd_pend_i = Signal(fu_row_n, reset_less=True)
+        self.wr_pend_i = Signal(fu_row_n, reset_less=True)
+
+        self.readable_o = Signal(reset_less=True)
+        self.writable_o = Signal(reset_less=True)
+
+    def elaborate(self, platform):
+        m = Module()
+        m.d.comb += self.readable_o.eq(self.rd_pend_i.bool())
+        m.d.comb += self.writable_o.eq(self.wr_pend_i.bool())
+        return m
+
diff --git a/src/scoreboard/fu_reg_matrix.py b/src/scoreboard/fu_reg_matrix.py
index efec9d6a..c21cf34e 100644
--- a/src/scoreboard/fu_reg_matrix.py
+++ b/src/scoreboard/fu_reg_matrix.py
@@ -159,7 +159,7 @@ class FURegDepMatrix(Elaboratable):
                         ]
 
         # ---
-        # connect Dependency Matrix go_read_i/go_write_i to module gr/gw
+        # connect Dependency Matrix go_read_i/go_write_i to module go_rd/go_wr
         # ---
         for fu in range(self.n_fu_row):
             fup = fupend[fu]