class FURegDepMatrix(Elaboratable):
""" implements 11.4.7 mitch alsup FU-to-Reg Dependency Matrix, p26
"""
- def __init__(self, n_fu_row, n_reg_col):
- self.n_fu_row = n_fu_row # Y (FUs) ^v
- self.n_reg_col = n_reg_col # X (Regs) <>
+ def __init__(self, n_fu_row, n_reg_col, n_src):
+ self.n_src = n_src
+ self.n_fu_row = nf = n_fu_row # Y (FUs) ^v
+ self.n_reg_col = n_reg = n_reg_col # X (Regs) <>
+
+ # arrays
+ src = []
+ rsel = []
+ for i in range(n_src):
+ j = i + 1 # name numbering to match src1/src2
+ src.append(Signal(n_reg, name="src%d" % j, reset_less=True))
+ rsel.append(Signal(n_reg, name="src%d_rsel_o" % j, reset_less=True))
+ pend = []
+ for i in range(nf):
+ j = i + 1 # name numbering to match src1/src2
+ pend.append(Signal(nf, name="rd_src%d_pend_o" % j, reset_less=True))
+
self.dest_i = Signal(n_reg_col, reset_less=True) # Dest in (top)
- self.src1_i = Signal(n_reg_col, reset_less=True) # oper1 in (top)
- self.src2_i = Signal(n_reg_col, reset_less=True) # oper2 in (top)
+ self.src_i = Array(src) # oper in (top)
# Register "Global" vectors for determining RaW and WaR hazards
self.wr_pend_i = Signal(n_reg_col, reset_less=True) # wr pending (top)
# for Register File Select Lines (horizontal), per-reg
self.dest_rsel_o = Signal(n_reg_col, reset_less=True) # dest reg (bot)
- self.src1_rsel_o = Signal(n_reg_col, reset_less=True) # src1 reg (bot)
- self.src2_rsel_o = Signal(n_reg_col, reset_less=True) # src2 reg (bot)
+ self.src_rsel_o = Array(rsel) # src reg (bot)
# for Function Unit "forward progress" (vertical), per-FU
self.wr_pend_o = Signal(n_fu_row, reset_less=True) # wr pending (right)
self.rd_pend_o = Signal(n_fu_row, reset_less=True) # rd pending (right)
- self.rd_src1_pend_o = Signal(n_fu_row, reset_less=True) # src1 pending
- self.rd_src2_pend_o = Signal(n_fu_row, reset_less=True) # src2 pending
+ self.rd_src_pend_o = Array(pend) # src1 pending
def elaborate(self, platform):
m = Module()
# ---
# matrix of dependency cells
# ---
- dm = Array(DependencyRow(self.n_reg_col) for r in range(self.n_fu_row))
+ dm = Array(DependencyRow(self.n_reg_col, self.n_src) \
+ for r in range(self.n_fu_row))
for fu in range(self.n_fu_row):
setattr(m.submodules, "dr_fu%d" % fu, dm[fu])
# ---
# array of Function Unit Pending vectors
# ---
- fupend = Array(FU_RW_Pend(self.n_reg_col) for f in range(self.n_fu_row))
+ fupend = Array(FU_RW_Pend(self.n_reg_col, self.n_src) \
+ for f in range(self.n_fu_row))
for fu in range(self.n_fu_row):
setattr(m.submodules, "fu_fu%d" % (fu), fupend[fu])
for rn in range(self.n_reg_col):
# accumulate cell fwd outputs for dest/src1/src2
dest_fwd_o.append(dc.dest_fwd_o[rn])
- src1_fwd_o.append(dc.src1_fwd_o[rn])
- src2_fwd_o.append(dc.src2_fwd_o[rn])
+ src1_fwd_o.append(dc.src_fwd_o[0][rn])
+ src2_fwd_o.append(dc.src_fwd_o[1][rn])
# connect cell fwd outputs to FU Vector in [Cat is gooood]
m.d.comb += [fup.dest_fwd_i.eq(Cat(*dest_fwd_o)),
- fup.src1_fwd_i.eq(Cat(*src1_fwd_o)),
- fup.src2_fwd_i.eq(Cat(*src2_fwd_o))
+ fup.src_fwd_i[0].eq(Cat(*src1_fwd_o)),
+ fup.src_fwd_i[1].eq(Cat(*src2_fwd_o))
]
# accumulate FU Vector outputs
wr_pend.append(fup.reg_wr_pend_o)
rd_pend.append(fup.reg_rd_pend_o)
- rd_src1_pend.append(fup.reg_rd_src1_pend_o)
- rd_src2_pend.append(fup.reg_rd_src2_pend_o)
+ rd_src1_pend.append(fup.reg_rd_src_pend_o[0])
+ rd_src2_pend.append(fup.reg_rd_src_pend_o[1])
# ... and output them from this module (vertical, width=FUs)
m.d.comb += self.wr_pend_o.eq(Cat(*wr_pend))
m.d.comb += self.rd_pend_o.eq(Cat(*rd_pend))
- m.d.comb += self.rd_src1_pend_o.eq(Cat(*rd_src1_pend))
- m.d.comb += self.rd_src2_pend_o.eq(Cat(*rd_src2_pend))
+ m.d.comb += self.rd_src_pend_o[0].eq(Cat(*rd_src1_pend))
+ m.d.comb += self.rd_src_pend_o[1].eq(Cat(*rd_src2_pend))
# ---
# connect Reg Selection vector
dc = dm[fu]
# accumulate cell reg-select outputs dest/src1/src2
dest_rsel_o.append(dc.dest_rsel_o[rn])
- src1_rsel_o.append(dc.src1_rsel_o[rn])
- src2_rsel_o.append(dc.src2_rsel_o[rn])
+ src1_rsel_o.append(dc.src_rsel_o[0][rn])
+ src2_rsel_o.append(dc.src_rsel_o[1][rn])
# connect cell reg-select outputs to Reg Vector In
m.d.comb += [rsv.dest_rsel_i.eq(Cat(*dest_rsel_o)),
rsv.src1_rsel_i.eq(Cat(*src1_rsel_o)),
# ... and output them from this module (horizontal, width=REGs)
m.d.comb += self.dest_rsel_o.eq(Cat(*dest_rsel))
- m.d.comb += self.src1_rsel_o.eq(Cat(*src1_rsel))
- m.d.comb += self.src2_rsel_o.eq(Cat(*src2_rsel))
+ m.d.comb += self.src_rsel_o[0].eq(Cat(*src1_rsel))
+ m.d.comb += self.src_rsel_o[1].eq(Cat(*src2_rsel))
# ---
# connect Dependency Matrix dest/src1/src2/issue to module d/s/s/i
dc = dm[fu]
# wire up inputs from module to row cell inputs (Cat is gooood)
m.d.comb += [dc.dest_i.eq(self.dest_i),
- dc.src1_i.eq(self.src1_i),
- dc.src2_i.eq(self.src2_i),
+ dc.src_i[0].eq(self.src_i[0]),
+ dc.src_i[1].eq(self.src_i[1]),
dc.rd_pend_i.eq(self.rd_pend_i),
dc.wr_pend_i.eq(self.wr_pend_i),
]
def __iter__(self):
yield self.dest_i
- yield self.src1_i
- yield self.src2_i
+ yield from self.src_i
yield self.issue_i
yield self.go_wr_i
yield self.go_rd_i
yield self.go_die_i
yield self.dest_rsel_o
- yield self.src1_rsel_o
- yield self.src2_rsel_o
+ yield from self.src_rsel_o
yield self.wr_pend_o
yield self.rd_pend_o
yield self.wr_pend_i
yield self.rd_pend_i
yield self.v_wr_rsel_o
yield self.v_rd_rsel_o
- yield self.rd_src1_pend_o
- yield self.rd_src2_pend_o
+ yield from self.rd_src_pend_o
def ports(self):
return list(self)
yield
def test_d_matrix():
- dut = FURegDepMatrix(n_fu_row=3, n_reg_col=4)
+ dut = FURegDepMatrix(n_fu_row=3, n_reg_col=4, n_src=2)
vl = rtlil.convert(dut, ports=dut.ports())
with open("test_fu_reg_matrix.il", "w") as f:
f.write(vl)
projects / soc.git / blobdiff