From: Luke Kenneth Casson Leighton Date: Sat, 11 May 2019 09:51:56 +0000 (+0100) Subject: link function units back in to score6600 X-Git-Tag: div_pipeline~2074 X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=6713fb4deedd99baf129a9ae15a265e25fc6ff42;p=soc.git link function units back in to score6600 --- diff --git a/src/experiment/score6600.py b/src/experiment/score6600.py index 12d9e079..925445e7 100644 --- a/src/experiment/score6600.py +++ b/src/experiment/score6600.py @@ -65,8 +65,26 @@ class Scoreboard(Elaboratable): m.d.comb += comp1.oper_i.eq(Const(0)) # temporary/experiment: op=add m.d.comb += comp2.oper_i.eq(Const(1)) # temporary/experiment: op=sub + # Int FUs + if_l = [] + int_src1_pend_v = [] + int_src2_pend_v = [] + int_rd_pend_v = [] + int_wr_pend_v = [] + for i, a in enumerate(int_alus): + # set up Integer Function Unit, add to module (and python list) + fu = IntFnUnit(self.n_regs, shadow_wid=0) + setattr(m.submodules, "intfu%d" % i, fu) + if_l.append(fu) + # collate the read/write pending vectors (to go into global pending) + int_src1_pend_v.append(fu.src1_pend_o) + int_src2_pend_v.append(fu.src2_pend_o) + int_rd_pend_v.append(fu.int_rd_pend_o) + int_wr_pend_v.append(fu.int_wr_pend_o) + int_fus = Array(if_l) + # Count of number of FUs - n_int_fus = len(int_alus) + n_int_fus = len(if_l) n_fp_fus = 0 # for now n_fus = n_int_fus + n_fp_fus # plus FP FUs @@ -83,10 +101,15 @@ class Scoreboard(Elaboratable): m.submodules.intpick1 = intpick1 # Global Pending Vectors (INT and TODO FP) - g_int_src1_pend_v = intregdeps.rd_src2_pend_o - g_int_src2_pend_v = intregdeps.rd_src1_pend_o - g_int_rd_pend_v = intregdeps.rd_pend_o - g_int_wr_pend_v = intregdeps.wr_pend_o + # NOTE: number of vectors is NOT same as number of FUs. + g_int_src1_pend_v = GlobalPending(self.n_regs, int_src1_pend_v) + g_int_src2_pend_v = GlobalPending(self.n_regs, int_src2_pend_v) + g_int_rd_pend_v = GlobalPending(self.n_regs, int_rd_pend_v) + g_int_wr_pend_v = GlobalPending(self.n_regs, int_wr_pend_v) + m.submodules.g_int_src1_pend_v = g_int_src1_pend_v + m.submodules.g_int_src2_pend_v = g_int_src2_pend_v + m.submodules.g_int_rd_pend_v = g_int_rd_pend_v + m.submodules.g_int_wr_pend_v = g_int_wr_pend_v # INT/FP Issue Unit regdecode = RegDecode(self.n_regs) @@ -114,32 +137,31 @@ class Scoreboard(Elaboratable): self.int_insn_i = issueunit.i.insn_i # enabled by instruction decode # connect global rd/wr pending vectors - m.d.comb += issueunit.i.g_wr_pend_i.eq(g_int_wr_pend_v) + m.d.comb += issueunit.i.g_wr_pend_i.eq(g_int_wr_pend_v.g_pend_o) # TODO: issueunit.f (FP) # and int function issue / busy arrays, and dest/src1/src2 fn_busy_l = [] fn_issue_l = [] for i, alu in enumerate(int_alus): - fn_busy_l.append(alu.busy_o) - fn_issue_l.append(issueunit.i.fn_issue_o[i]) - - m.d.comb += alu.issue_i.eq(fn_issue_l[i]) + fn_issue_l.append(fu.issue_i) + fn_busy_l.append(fu.busy_o) + m.d.sync += fu.issue_i.eq(issueunit.i.fn_issue_o[i]) + m.d.comb += fu.dest_i.eq(self.int_dest_i) + m.d.comb += fu.src1_i.eq(self.int_src1_i) + m.d.comb += fu.src2_i.eq(self.int_src2_i) # XXX sync, so as to stop a simulation infinite loop - m.d.comb += issueunit.i.busy_i[i].eq(alu.busy_o) - #m.d.comb += alu.dest_i.eq(issueunit.i.dest_i) - #m.d.comb += alu.src1_i.eq(issueunit.i.src1_i) - #m.d.comb += alu.src2_i.eq(issueunit.i.src2_i) - # NOTE: req_rel_o connected to picker, below. + m.d.comb += issueunit.i.busy_i[i].eq(fu.busy_o) fn_issue_o = Signal(len(fn_issue_l), reset_less=True) m.d.comb += fn_issue_o.eq(Cat(*fn_issue_l)) + #fn_issue_o = issueunit.i.fn_issue_o #--------- # connect fu-fu matrix #--------- - m.d.comb += intfudeps.rd_pend_i.eq(g_int_rd_pend_v) - m.d.comb += intfudeps.wr_pend_i.eq(g_int_wr_pend_v) + m.d.comb += intfudeps.rd_pend_i.eq(g_int_rd_pend_v.g_pend_o) + m.d.comb += intfudeps.wr_pend_i.eq(g_int_wr_pend_v.g_pend_o) # Group Picker... done manually for now. TODO: cat array of pick sigs go_rd_i = intfudeps.go_rd_i