All 5 dividers added with LEC
This commit is contained in:
Laraib Khan
parent
bf4de4dc91
commit
1c84acbbfc
3588
exu_div_ctl.fir
3588
exu_div_ctl.fir
File diff suppressed because it is too large
Load Diff
1428
exu_div_ctl.v
1428
exu_div_ctl.v
File diff suppressed because it is too large
Load Diff
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@ -171,29 +171,29 @@ class exu_div_existing_1bit_cheapshortq extends Module with RequireAsyncReset wi
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val a_cls = Cat(0.U(2.W),
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val a_cls = Cat(0.U(2.W),
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Mux1H(Seq (
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Mux1H(Seq (
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!short_dividend(32).asBool -> (short_dividend(31,24) =/= Fill(8,0.U)),
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!short_dividend(32).asBool -> (short_dividend(31,24) =/= Fill(8,0.U)),
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short_dividend(32).asBool -> (short_dividend(31,23) =/= Fill(9,1.U))
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short_dividend(32).asBool -> (short_dividend(31,23) =/= Fill(9,1.U))
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)),
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)),
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Mux1H(Seq (
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Mux1H(Seq (
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!short_dividend(32).asBool -> (short_dividend(23,16) =/= Fill(8,0.U)),
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!short_dividend(32).asBool -> (short_dividend(23,16) =/= Fill(8,0.U)),
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short_dividend(32).asBool -> (short_dividend(22,15) =/= Fill(8,1.U))
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short_dividend(32).asBool -> (short_dividend(22,15) =/= Fill(8,1.U))
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)),
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)),
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Mux1H(Seq (
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Mux1H(Seq (
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!short_dividend(32).asBool -> (short_dividend(15,8) =/= Fill(8,0.U)),
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!short_dividend(32).asBool -> (short_dividend(15,8) =/= Fill(8,0.U)),
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short_dividend(32).asBool -> (short_dividend(14,7) =/= Fill(8,1.U))
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short_dividend(32).asBool -> (short_dividend(14,7) =/= Fill(8,1.U))
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))
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))
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)
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)
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val b_cls = Cat(0.U(2.W),
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val b_cls = Cat(0.U(2.W),
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Mux1H(Seq (
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Mux1H(Seq (
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!m_ff(32).asBool -> (m_ff(31,24) =/= Fill(8,0.U)),
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!m_ff(32).asBool -> (m_ff(31,24) =/= Fill(8,0.U)),
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m_ff(32).asBool -> (m_ff(31,24) =/= Fill(8,1.U))
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m_ff(32).asBool -> (m_ff(31,24) =/= Fill(8,1.U))
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)),
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)),
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Mux1H(Seq (
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Mux1H(Seq (
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!m_ff(32).asBool -> (m_ff(23,16) =/= Fill(8,0.U)),
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!m_ff(32).asBool -> (m_ff(23,16) =/= Fill(8,0.U)),
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m_ff(32).asBool -> (m_ff(23,16) =/= Fill(8,1.U))
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m_ff(32).asBool -> (m_ff(23,16) =/= Fill(8,1.U))
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)),
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)),
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Mux1H(Seq (
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Mux1H(Seq (
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!m_ff(32).asBool -> (m_ff(15,8) =/= Fill(8,0.U)),
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!m_ff(32).asBool -> (m_ff(15,8) =/= Fill(8,0.U)),
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m_ff(32).asBool -> (m_ff(15,8) =/= Fill(8,1.U))
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m_ff(32).asBool -> (m_ff(15,8) =/= Fill(8,1.U))
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))
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))
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)
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)
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val shortq_raw = Cat(
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val shortq_raw = Cat(
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@ -209,7 +209,7 @@ class exu_div_existing_1bit_cheapshortq extends Module with RequireAsyncReset wi
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( (a_cls(2,0) === "b001".U ) & (b_cls(2,0) === "b001".U ) ) |
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( (a_cls(2,0) === "b001".U ) & (b_cls(2,0) === "b001".U ) ) |
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( (a_cls(2,0) === "b000".U ) & (b_cls(2,0) === "b000".U ) ) ,
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( (a_cls(2,0) === "b000".U ) & (b_cls(2,0) === "b000".U ) ) ,
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( (a_cls(2) === "b1".U ) & (b_cls(2,1) === "b01".U ) ) | // Shift by 16
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( (a_cls(2) === "b1".U ) & (b_cls(2,1) === "b01".U ) ) | // Shift by 16
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( (a_cls(2,1) === "b01".U ) & (b_cls(2,0) === "b001".U ) ) |
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( (a_cls(2,1) === "b01".U ) & (b_cls(2,0) === "b001".U ) ) |
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( (a_cls(2,0) === "b001".U ) & (b_cls(2,0) === "b000".U ) ) ,
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( (a_cls(2,0) === "b001".U ) & (b_cls(2,0) === "b000".U ) ) ,
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@ -230,13 +230,13 @@ class exu_div_existing_1bit_cheapshortq extends Module with RequireAsyncReset wi
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val finish = smallnum_case | Mux(!rem_ff ,count === 32.U(6.W) ,count === 33.U(6.W))
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val finish = smallnum_case | Mux(!rem_ff ,count === 32.U(6.W) ,count === 33.U(6.W))
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val div_clken = io.valid_in | run_state | finish | finish_ff
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val div_clken = io.valid_in | run_state | finish | finish_ff
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val run_in = (io.valid_in | run_state) & !finish & !io.cancel
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val run_in = (io.valid_in | run_state) & !finish & !io.cancel
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count_in := Fill(6,(run_state & !finish & !io.cancel & !shortq_enable)) & (count + Cat(0.U,shortq_shift_ff(4,0)) + (1.U)(6.W))
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count_in := Fill(6,(run_state & !finish & !io.cancel & !shortq_enable)) & (count + Cat(0.U,shortq_shift_ff(4,0)) + (1.U)(6.W))
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io.valid_out := finish_ff & !io.cancel
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io.valid_out := finish_ff & !io.cancel
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val sign_eff = io.signed_in & (io.divisor_in =/= 0.U(32.W))
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val sign_eff = io.signed_in & (io.divisor_in =/= 0.U(32.W))
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q_in := Mux1H(Seq(
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q_in := Mux1H(Seq(
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(!run_state).asBool -> Cat(0.U(1.W),io.dividend_in) ,
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(!run_state).asBool -> Cat(0.U(1.W),io.dividend_in) ,
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(run_state & (valid_ff_x | shortq_enable_ff)).asBool -> (Cat(dividend_eff(31,0),!a_in(32)) << shortq_shift_ff(4,0)) ,
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(run_state & (valid_ff_x | shortq_enable_ff)).asBool -> (Cat(dividend_eff(31,0),!a_in(32)) << shortq_shift_ff(4,0)) ,
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(run_state & !(valid_ff_x | shortq_enable_ff)).asBool -> Cat(q_ff(31,0),!a_in(32))
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(run_state & !(valid_ff_x | shortq_enable_ff)).asBool -> Cat(q_ff(31,0),!a_in(32))
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))
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))
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val qff_enable = io.valid_in | (run_state & !shortq_enable)
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val qff_enable = io.valid_in | (run_state & !shortq_enable)
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@ -263,22 +263,21 @@ class exu_div_existing_1bit_cheapshortq extends Module with RequireAsyncReset wi
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rem_ff.asBool -> a_ff_eff ,
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rem_ff.asBool -> a_ff_eff ,
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(!smallnum_case_ff & !rem_ff).asBool -> q_ff_eff
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(!smallnum_case_ff & !rem_ff).asBool -> q_ff_eff
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))
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))
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valid_ff_x := rvdffe(io.valid_in & !io.cancel, div_clken,clock,io.scan_mode)
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valid_ff_x := rvdffe(io.valid_in & !io.cancel, div_clken,clock,io.scan_mode)
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finish_ff := rvdffe(finish & !io.cancel, div_clken,clock,io.scan_mode)
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finish_ff := rvdffe(finish & !io.cancel, div_clken,clock,io.scan_mode)
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run_state := rvdffe(run_in,div_clken,clock,io.scan_mode)
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run_state := rvdffe(run_in,div_clken,clock,io.scan_mode)
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count := rvdffe(count_in, div_clken,clock,io.scan_mode)
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count := rvdffe(count_in, div_clken,clock,io.scan_mode)
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dividend_neg_ff := rvdffe((io.valid_in & io.dividend_in(31)) | (!io.valid_in & dividend_neg_ff), div_clken,clock,io.scan_mode)
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dividend_neg_ff := rvdffe((io.valid_in & io.dividend_in(31)) | (!io.valid_in & dividend_neg_ff), div_clken,clock,io.scan_mode)
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divisor_neg_ff := rvdffe((io.valid_in & io.divisor_in(31)) | (!io.valid_in & divisor_neg_ff), div_clken,clock,io.scan_mode)
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divisor_neg_ff := rvdffe((io.valid_in & io.divisor_in(31)) | (!io.valid_in & divisor_neg_ff), div_clken,clock,io.scan_mode)
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sign_ff := rvdffe((io.valid_in & sign_eff) | (!io.valid_in & sign_ff), div_clken,clock,io.scan_mode)
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sign_ff := rvdffe((io.valid_in & sign_eff) | (!io.valid_in & sign_ff), div_clken,clock,io.scan_mode)
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rem_ff := rvdffe((io.valid_in & io.rem_in) | (!io.valid_in & rem_ff), div_clken,clock,io.scan_mode)
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rem_ff := rvdffe((io.valid_in & io.rem_in) | (!io.valid_in & rem_ff), div_clken,clock,io.scan_mode)
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smallnum_case_ff := rvdffe(smallnum_case, div_clken,clock,io.scan_mode)
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smallnum_case_ff := rvdffe(smallnum_case, div_clken,clock,io.scan_mode)
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smallnum_ff := rvdffe(smallnum, div_clken,clock,io.scan_mode)
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smallnum_ff := rvdffe(smallnum, div_clken,clock,io.scan_mode)
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shortq_enable_ff := rvdffe(shortq_enable, div_clken,clock,io.scan_mode)
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shortq_enable_ff := rvdffe(shortq_enable, div_clken,clock,io.scan_mode)
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shortq_shift_xx := rvdffe(shortq_shift, div_clken,clock,io.scan_mode)
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shortq_shift_xx := rvdffe(shortq_shift, div_clken,clock,io.scan_mode)
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q_ff := rvdffe(q_in, qff_enable,clock,io.scan_mode)
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q_ff := rvdffe(q_in, qff_enable,clock,io.scan_mode)
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a_ff := rvdffe(a_in, aff_enable,clock,io.scan_mode)
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a_ff := rvdffe(a_in, aff_enable,clock,io.scan_mode)
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m_ff := rvdffe(Cat(io.signed_in & io.divisor_in(31), io.divisor_in(31,0)), io.valid_in,clock,io.scan_mode)
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m_ff := rvdffe(Cat(io.signed_in & io.divisor_in(31), io.divisor_in(31,0)), io.valid_in,clock,io.scan_mode)
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}
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}
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/////////////////////////////////////////////// 1 BIT FULL DIVIDER//////////////////////////////////
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/////////////////////////////////////////////// 1 BIT FULL DIVIDER//////////////////////////////////
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@ -396,30 +395,30 @@ class exu_div_new_1bit_fullshortq extends Module with RequireAsyncReset with lib
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pat1(List(3, 2, 1, 0),List(3)) |pat1(List(3, 1),List(-2)) & !b_ff(0))
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pat1(List(3, 2, 1, 0),List(3)) |pat1(List(3, 1),List(-2)) & !b_ff(0))
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val shortq_dividend = Cat(dividend_sign_ff,a_ff)
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val shortq_dividend = Cat(dividend_sign_ff,a_ff)
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val a_enc = Module(new exu_div_cls)
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val a_enc = Module(new exu_div_cls)
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a_enc.io.operand := shortq_dividend
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a_enc.io.operand := shortq_dividend
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val dw_a_enc1 = a_enc.io.cls
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val dw_a_enc1 = a_enc.io.cls
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val b_enc = Module(new exu_div_cls)
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val b_enc = Module(new exu_div_cls)
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b_enc.io.operand := b_ff
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b_enc.io.operand := b_ff
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val dw_b_enc1 = b_enc.io.cls
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val dw_b_enc1 = b_enc.io.cls
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val dw_a_enc = Cat (0.U, dw_a_enc1)
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val dw_a_enc = Cat (0.U, dw_a_enc1)
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val dw_b_enc = Cat (0.U, dw_b_enc1)
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val dw_b_enc = Cat (0.U, dw_b_enc1)
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val dw_shortq_raw = Cat(0.U,dw_b_enc) - Cat(0.U,dw_a_enc) + 1.U(7.W)
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val dw_shortq_raw = Cat(0.U,dw_b_enc) - Cat(0.U,dw_a_enc) + 1.U(7.W)
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val shortq = Mux(dw_shortq_raw(6).asBool(),0.U,dw_shortq_raw(5,0))
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val shortq = Mux(dw_shortq_raw(6).asBool(),0.U,dw_shortq_raw(5,0))
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shortq_enable := valid_ff & !shortq(5) & !(shortq(4,1) === "b1111".U) & !io.cancel
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shortq_enable := valid_ff & !shortq(5) & !(shortq(4,1) === "b1111".U) & !io.cancel
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val shortq_shift = Mux(!shortq_enable,0.U,("b11111".U - shortq(4,0)))
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val shortq_shift = Mux(!shortq_enable,0.U,("b11111".U - shortq(4,0)))
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valid_ff := rvdffe(valid_ff_in, misc_enable,clock,io.scan_mode)
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valid_ff := rvdffe(valid_ff_in, misc_enable,clock,io.scan_mode)
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control_ff := rvdffe(control_in, misc_enable,clock,io.scan_mode)
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control_ff := rvdffe(control_in, misc_enable,clock,io.scan_mode)
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by_zero_case_ff := rvdffe(by_zero_case,misc_enable,clock,io.scan_mode)
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by_zero_case_ff := rvdffe(by_zero_case,misc_enable,clock,io.scan_mode)
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shortq_enable_ff := rvdffe(shortq_enable, misc_enable,clock,io.scan_mode)
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shortq_enable_ff := rvdffe(shortq_enable, misc_enable,clock,io.scan_mode)
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shortq_shift_ff := rvdffe(shortq_shift, misc_enable,clock,io.scan_mode)
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shortq_shift_ff := rvdffe(shortq_shift, misc_enable,clock,io.scan_mode)
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finish_ff := rvdffe(finish, misc_enable,clock,io.scan_mode)
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finish_ff := rvdffe(finish, misc_enable,clock,io.scan_mode)
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count_ff := rvdffe(count_in, misc_enable,clock,io.scan_mode)
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count_ff := rvdffe(count_in, misc_enable,clock,io.scan_mode)
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a_ff := rvdffe(a_in, a_enable,clock,io.scan_mode)
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a_ff := rvdffe(a_in, a_enable,clock,io.scan_mode)
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b_ff := rvdffe(b_in, b_enable,clock,io.scan_mode)
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b_ff := rvdffe(b_in, b_enable,clock,io.scan_mode)
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r_ff := rvdffe(r_in, rq_enable,clock,io.scan_mode)
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r_ff := rvdffe(r_in, rq_enable,clock,io.scan_mode)
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q_ff := rvdffe(q_in, rq_enable,clock,io.scan_mode)
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q_ff := rvdffe(q_in, rq_enable,clock,io.scan_mode)
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}
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}
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/////////////////////////////////////////////// 2 BIT FULL DIVIDER//////////////////////////////////
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/////////////////////////////////////////////// 2 BIT FULL DIVIDER//////////////////////////////////
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class exu_div_new_2bit_fullshortq extends Module with RequireAsyncReset with lib {
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class exu_div_new_2bit_fullshortq extends Module with RequireAsyncReset with lib {
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@ -478,48 +477,48 @@ class exu_div_new_2bit_fullshortq extends Module with RequireAsyncReset with lib
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val r_adder1_sel = running_state & (quotient_new === 1.U) & !shortq_enable_ff
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val r_adder1_sel = running_state & (quotient_new === 1.U) & !shortq_enable_ff
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val r_adder2_sel = running_state & (quotient_new === 2.U) & !shortq_enable_ff
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val r_adder2_sel = running_state & (quotient_new === 2.U) & !shortq_enable_ff
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val r_adder3_sel = running_state & (quotient_new === 3.U) & !shortq_enable_ff
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val r_adder3_sel = running_state & (quotient_new === 3.U) & !shortq_enable_ff
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val adder1_out = Cat(r_ff(30,0),a_ff(31,30)) + b_ff(32,0)
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val adder1_out = Cat(r_ff(30,0),a_ff(31,30)) + b_ff(32,0)
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val adder2_out = Cat(r_ff(31,0),a_ff(31,30)) + Cat(b_ff(32,0),0.U)
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val adder2_out = Cat(r_ff(31,0),a_ff(31,30)) + Cat(b_ff(32,0),0.U)
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val adder3_out = Cat(r_ff(31),r_ff(31,0),a_ff(31,30)) + Cat(b_ff(33,0),0.U) + b_ff
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val adder3_out = Cat(r_ff(31),r_ff(31,0),a_ff(31,30)) + Cat(b_ff(33,0),0.U) + b_ff
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quotient_raw := Cat((!adder3_out(34) ^ dividend_sign_ff) | ((a_ff(29,0) === 0.U) & (adder3_out === 0.U)),
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quotient_raw := Cat((!adder3_out(34) ^ dividend_sign_ff) | ((a_ff(29,0) === 0.U) & (adder3_out === 0.U)),
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(!adder2_out(33) ^ dividend_sign_ff) | ((a_ff(29,0) === 0.U) & (adder2_out === 0.U)),
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(!adder2_out(33) ^ dividend_sign_ff) | ((a_ff(29,0) === 0.U) & (adder2_out === 0.U)),
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(!adder1_out(32) ^ dividend_sign_ff) | ((a_ff(29,0) === 0.U) & (adder1_out === 0.U)),0.U)
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(!adder1_out(32) ^ dividend_sign_ff) | ((a_ff(29,0) === 0.U) & (adder1_out === 0.U)),0.U)
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quotient_new := Cat ((quotient_raw(3) | quotient_raw(2)) , (quotient_raw(3) |(!quotient_raw(2) & quotient_raw(1))))
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quotient_new := Cat ((quotient_raw(3) | quotient_raw(2)) , (quotient_raw(3) |(!quotient_raw(2) & quotient_raw(1))))
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val twos_comp_in = Mux1H(Seq (
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val twos_comp_in = Mux1H(Seq (
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twos_comp_q_sel -> q_ff,
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twos_comp_q_sel -> q_ff,
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twos_comp_b_sel -> b_ff(31,0)
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twos_comp_b_sel -> b_ff(31,0)
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))
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))
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val twos_comp_out = rvtwoscomp(twos_comp_in)
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val twos_comp_out = rvtwoscomp(twos_comp_in)
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val a_in = Mux1H(Seq (
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val a_in = Mux1H(Seq (
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(!a_shift & !shortq_enable_ff).asBool -> io.dividend_in,
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(!a_shift & !shortq_enable_ff).asBool -> io.dividend_in,
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a_shift -> Cat(a_ff(29,0),0.U(2.W)),
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a_shift -> Cat(a_ff(29,0),0.U(2.W)),
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shortq_enable_ff -> ar_shifted(31,0)
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shortq_enable_ff -> ar_shifted(31,0)
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))
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))
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val b_in = Mux1H(Seq (
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val b_in = Mux1H(Seq (
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!b_twos_comp -> Cat(io.signed_in & io.divisor_in(31),io.divisor_in(31,0)),
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!b_twos_comp -> Cat(io.signed_in & io.divisor_in(31),io.divisor_in(31,0)),
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b_twos_comp -> Cat(!divisor_sign_ff,twos_comp_out(31,0))
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b_twos_comp -> Cat(!divisor_sign_ff,twos_comp_out(31,0))
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))
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))
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val r_in = Mux1H (Seq(
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val r_in = Mux1H (Seq(
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r_sign_sel -> "hffffffff".U(32.W),
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r_sign_sel -> "hffffffff".U(32.W),
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r_restore_sel -> Cat(r_ff(29,0),a_ff(31,30)),
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r_restore_sel -> Cat(r_ff(29,0),a_ff(31,30)),
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r_adder1_sel -> adder1_out(31,0),
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r_adder1_sel -> adder1_out(31,0),
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r_adder2_sel -> adder2_out(31,0),
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r_adder2_sel -> adder2_out(31,0),
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r_adder3_sel -> adder3_out(31,0),
|
r_adder3_sel -> adder3_out(31,0),
|
||||||
shortq_enable_ff -> ar_shifted(63,32),
|
shortq_enable_ff -> ar_shifted(63,32),
|
||||||
by_zero_case -> a_ff
|
by_zero_case -> a_ff
|
||||||
))
|
))
|
||||||
val q_in = Mux1H (Seq(
|
val q_in = Mux1H (Seq(
|
||||||
!valid_ff -> Cat(q_ff(29,0),quotient_new),
|
!valid_ff -> Cat(q_ff(29,0),quotient_new),
|
||||||
smallnum_case -> Cat(0.U(28.W),smallnum),
|
smallnum_case -> Cat(0.U(28.W),smallnum),
|
||||||
by_zero_case -> Fill(32,1.U)
|
by_zero_case -> Fill(32,1.U)
|
||||||
))
|
))
|
||||||
io.valid_out := finish_ff & !io.cancel
|
io.valid_out := finish_ff & !io.cancel
|
||||||
io.data_out := Mux1H(Seq(
|
io.data_out := Mux1H(Seq(
|
||||||
(!rem_ff & !twos_comp_q_sel).asBool() -> q_ff,
|
(!rem_ff & !twos_comp_q_sel).asBool() -> q_ff,
|
||||||
rem_ff -> r_ff,
|
rem_ff -> r_ff,
|
||||||
twos_comp_q_sel -> twos_comp_out
|
twos_comp_q_sel -> twos_comp_out
|
||||||
))
|
))
|
||||||
def pat1(x : List[Int], y : List[Int]) = {
|
def pat1(x : List[Int], y : List[Int]) = {
|
||||||
val pat_a = (0 until x.size).map(i=> if(x(i)>=0) a_ff(x(i)) else !a_ff(x(i).abs)).reduce(_&_)
|
val pat_a = (0 until x.size).map(i=> if(x(i)>=0) a_ff(x(i)) else !a_ff(x(i).abs)).reduce(_&_)
|
||||||
|
|
@ -546,31 +545,31 @@ class exu_div_new_2bit_fullshortq extends Module with RequireAsyncReset with lib
|
||||||
pat1(List(3, 2, 1, 0),List(3)) |pat1(List(3, 1),List(-2)) & !b_ff(0))
|
pat1(List(3, 2, 1, 0),List(3)) |pat1(List(3, 1),List(-2)) & !b_ff(0))
|
||||||
|
|
||||||
val shortq_dividend = Cat(dividend_sign_ff,a_ff)
|
val shortq_dividend = Cat(dividend_sign_ff,a_ff)
|
||||||
val a_enc = Module(new exu_div_cls)
|
val a_enc = Module(new exu_div_cls)
|
||||||
a_enc.io.operand := shortq_dividend
|
a_enc.io.operand := shortq_dividend
|
||||||
val dw_a_enc1 = a_enc.io.cls
|
val dw_a_enc1 = a_enc.io.cls
|
||||||
val b_enc = Module(new exu_div_cls)
|
val b_enc = Module(new exu_div_cls)
|
||||||
b_enc.io.operand := b_ff(32,0)
|
b_enc.io.operand := b_ff(32,0)
|
||||||
val dw_b_enc1 = b_enc.io.cls
|
val dw_b_enc1 = b_enc.io.cls
|
||||||
val dw_a_enc = Cat (0.U, dw_a_enc1)
|
val dw_a_enc = Cat (0.U, dw_a_enc1)
|
||||||
val dw_b_enc = Cat (0.U, dw_b_enc1)
|
val dw_b_enc = Cat (0.U, dw_b_enc1)
|
||||||
val dw_shortq_raw = Cat(0.U,dw_b_enc) - Cat(0.U,dw_a_enc) + 1.U(7.W)
|
val dw_shortq_raw = Cat(0.U,dw_b_enc) - Cat(0.U,dw_a_enc) + 1.U(7.W)
|
||||||
val shortq = Mux(dw_shortq_raw(6).asBool(),0.U,dw_shortq_raw(5,0))
|
val shortq = Mux(dw_shortq_raw(6).asBool(),0.U,dw_shortq_raw(5,0))
|
||||||
shortq_enable := valid_ff & !shortq(5) & !(shortq(4,1) === "b1111".U) & !io.cancel
|
shortq_enable := valid_ff & !shortq(5) & !(shortq(4,1) === "b1111".U) & !io.cancel
|
||||||
val shortq_shift = Mux(!shortq_enable,0.U,("b11111".U - shortq(4,0)))
|
val shortq_shift = Mux(!shortq_enable,0.U,("b11111".U - shortq(4,0)))
|
||||||
b_ff := Cat(b_ff1(32),b_ff1(32),b_ff1)
|
b_ff := Cat(b_ff1(32),b_ff1(32),b_ff1)
|
||||||
valid_ff := rvdffe(valid_ff_in, misc_enable,clock,io.scan_mode)
|
valid_ff := rvdffe(valid_ff_in, misc_enable,clock,io.scan_mode)
|
||||||
control_ff := rvdffe(control_in, misc_enable,clock,io.scan_mode)
|
control_ff := rvdffe(control_in, misc_enable,clock,io.scan_mode)
|
||||||
by_zero_case_ff := rvdffe(by_zero_case,misc_enable,clock,io.scan_mode)
|
by_zero_case_ff := rvdffe(by_zero_case,misc_enable,clock,io.scan_mode)
|
||||||
shortq_enable_ff := rvdffe(shortq_enable, misc_enable,clock,io.scan_mode)
|
shortq_enable_ff := rvdffe(shortq_enable, misc_enable,clock,io.scan_mode)
|
||||||
shortq_shift_ff := Cat(rvdffe(shortq_shift(4,1), misc_enable,clock,io.scan_mode),0.U)
|
shortq_shift_ff := Cat(rvdffe(shortq_shift(4,1), misc_enable,clock,io.scan_mode),0.U)
|
||||||
finish_ff := rvdffe(finish, misc_enable,clock,io.scan_mode)
|
finish_ff := rvdffe(finish, misc_enable,clock,io.scan_mode)
|
||||||
count_ff := rvdffe(count_in, misc_enable,clock,io.scan_mode)
|
count_ff := rvdffe(count_in, misc_enable,clock,io.scan_mode)
|
||||||
|
|
||||||
a_ff := rvdffe(a_in, a_enable,clock,io.scan_mode)
|
a_ff := rvdffe(a_in, a_enable,clock,io.scan_mode)
|
||||||
b_ff1 := rvdffe(b_in(32,0), b_enable,clock,io.scan_mode)
|
b_ff1 := rvdffe(b_in(32,0), b_enable,clock,io.scan_mode)
|
||||||
r_ff := rvdffe(r_in, rq_enable,clock,io.scan_mode)
|
r_ff := rvdffe(r_in, rq_enable,clock,io.scan_mode)
|
||||||
q_ff := rvdffe(q_in, rq_enable,clock,io.scan_mode)
|
q_ff := rvdffe(q_in, rq_enable,clock,io.scan_mode)
|
||||||
|
|
||||||
}
|
}
|
||||||
/////////////////////////////////////////////// 3 BIT FULL DIVIDER//////////////////////////////////
|
/////////////////////////////////////////////// 3 BIT FULL DIVIDER//////////////////////////////////
|
||||||
|
|
@ -649,42 +648,42 @@ class exu_div_new_3bit_fullshortq extends Module with RequireAsyncReset with lib
|
||||||
(quotient_raw(7) | quotient_raw(6) |(!quotient_raw(4) & quotient_raw(3)) |(!quotient_raw(3) & quotient_raw(2))),
|
(quotient_raw(7) | quotient_raw(6) |(!quotient_raw(4) & quotient_raw(3)) |(!quotient_raw(3) & quotient_raw(2))),
|
||||||
(quotient_raw(7) | (!quotient_raw(6) & quotient_raw(5)) | (!quotient_raw(4) & quotient_raw(3)) |(!quotient_raw(2) & quotient_raw(1))))
|
(quotient_raw(7) | (!quotient_raw(6) & quotient_raw(5)) | (!quotient_raw(4) & quotient_raw(3)) |(!quotient_raw(2) & quotient_raw(1))))
|
||||||
val twos_comp_in = Mux1H(Seq (
|
val twos_comp_in = Mux1H(Seq (
|
||||||
twos_comp_q_sel -> q_ff,
|
twos_comp_q_sel -> q_ff,
|
||||||
twos_comp_b_sel -> b_ff(31,0)
|
twos_comp_b_sel -> b_ff(31,0)
|
||||||
))
|
))
|
||||||
val twos_comp_out = rvtwoscomp(twos_comp_in)
|
val twos_comp_out = rvtwoscomp(twos_comp_in)
|
||||||
val a_in = Mux1H(Seq (
|
val a_in = Mux1H(Seq (
|
||||||
(!a_shift & !shortq_enable_ff).asBool -> Cat(io.signed_in & io.dividend_in(31),io.dividend_in(31,0)),
|
(!a_shift & !shortq_enable_ff).asBool -> Cat(io.signed_in & io.dividend_in(31),io.dividend_in(31,0)),
|
||||||
a_shift -> Cat(a_ff(29,0),0.U(3.W)),
|
a_shift -> Cat(a_ff(29,0),0.U(3.W)),
|
||||||
shortq_enable_ff -> ar_shifted(32,0)
|
shortq_enable_ff -> ar_shifted(32,0)
|
||||||
))
|
))
|
||||||
val b_in = Mux1H(Seq (
|
val b_in = Mux1H(Seq (
|
||||||
!b_twos_comp -> Cat(io.signed_in & io.divisor_in(31),io.divisor_in(31,0)),
|
!b_twos_comp -> Cat(io.signed_in & io.divisor_in(31),io.divisor_in(31,0)),
|
||||||
b_twos_comp -> Cat(!divisor_sign_ff,twos_comp_out(31,0))
|
b_twos_comp -> Cat(!divisor_sign_ff,twos_comp_out(31,0))
|
||||||
))
|
))
|
||||||
val r_in = Mux1H (Seq(
|
val r_in = Mux1H (Seq(
|
||||||
r_sign_sel -> Fill(33,1.U),
|
r_sign_sel -> Fill(33,1.U),
|
||||||
r_adder_sel(0) -> Cat(r_ff(29,0),a_ff(32,30)),
|
r_adder_sel(0) -> Cat(r_ff(29,0),a_ff(32,30)),
|
||||||
r_adder_sel(1) -> adder1_out(32,0),
|
r_adder_sel(1) -> adder1_out(32,0),
|
||||||
r_adder_sel(2) -> adder2_out(32,0),
|
r_adder_sel(2) -> adder2_out(32,0),
|
||||||
r_adder_sel(3) -> adder3_out(32,0),
|
r_adder_sel(3) -> adder3_out(32,0),
|
||||||
r_adder_sel(4) -> adder4_out(32,0),
|
r_adder_sel(4) -> adder4_out(32,0),
|
||||||
r_adder_sel(5) -> adder5_out(32,0),
|
r_adder_sel(5) -> adder5_out(32,0),
|
||||||
r_adder_sel(6) -> adder6_out(32,0),
|
r_adder_sel(6) -> adder6_out(32,0),
|
||||||
r_adder_sel(7) -> adder7_out(32,0),
|
r_adder_sel(7) -> adder7_out(32,0),
|
||||||
shortq_enable_ff -> ar_shifted(65,33),
|
shortq_enable_ff -> ar_shifted(65,33),
|
||||||
by_zero_case -> Cat(0.U,a_ff(31,0))
|
by_zero_case -> Cat(0.U,a_ff(31,0))
|
||||||
))
|
))
|
||||||
val q_in = Mux1H (Seq(
|
val q_in = Mux1H (Seq(
|
||||||
!valid_ff -> Cat(q_ff(28,0),quotient_new),
|
!valid_ff -> Cat(q_ff(28,0),quotient_new),
|
||||||
smallnum_case -> Cat(0.U(28.W),smallnum),
|
smallnum_case -> Cat(0.U(28.W),smallnum),
|
||||||
by_zero_case -> Fill(32,1.U)
|
by_zero_case -> Fill(32,1.U)
|
||||||
))
|
))
|
||||||
io.valid_out := finish_ff & !io.cancel
|
io.valid_out := finish_ff & !io.cancel
|
||||||
io.data_out := Mux1H(Seq(
|
io.data_out := Mux1H(Seq(
|
||||||
(!rem_ff & !twos_comp_q_sel).asBool() -> q_ff,
|
(!rem_ff & !twos_comp_q_sel).asBool() -> q_ff,
|
||||||
rem_ff -> r_ff(31,0),
|
rem_ff -> r_ff(31,0),
|
||||||
twos_comp_q_sel -> twos_comp_out
|
twos_comp_q_sel -> twos_comp_out
|
||||||
))
|
))
|
||||||
def pat1(x : List[Int], y : List[Int]) = {
|
def pat1(x : List[Int], y : List[Int]) = {
|
||||||
val pat_a = (0 until x.size).map(i=> if(x(i)>=0) a_ff(x(i)) else !a_ff(x(i).abs)).reduce(_&_)
|
val pat_a = (0 until x.size).map(i=> if(x(i)>=0) a_ff(x(i)) else !a_ff(x(i).abs)).reduce(_&_)
|
||||||
|
|
@ -711,48 +710,48 @@ class exu_div_new_3bit_fullshortq extends Module with RequireAsyncReset with lib
|
||||||
pat1(List(3, 2, 1, 0),List(3)) |pat1(List(3, 1),List(-2)) & !b_ff(0))
|
pat1(List(3, 2, 1, 0),List(3)) |pat1(List(3, 1),List(-2)) & !b_ff(0))
|
||||||
|
|
||||||
val shortq_dividend = Cat(dividend_sign_ff,a_ff(31,0))
|
val shortq_dividend = Cat(dividend_sign_ff,a_ff(31,0))
|
||||||
val a_enc = Module(new exu_div_cls)
|
val a_enc = Module(new exu_div_cls)
|
||||||
a_enc.io.operand := shortq_dividend
|
a_enc.io.operand := shortq_dividend
|
||||||
val dw_a_enc1 = a_enc.io.cls
|
val dw_a_enc1 = a_enc.io.cls
|
||||||
val b_enc = Module(new exu_div_cls)
|
val b_enc = Module(new exu_div_cls)
|
||||||
b_enc.io.operand := b_ff(32,0)
|
b_enc.io.operand := b_ff(32,0)
|
||||||
val dw_b_enc1 = b_enc.io.cls
|
val dw_b_enc1 = b_enc.io.cls
|
||||||
val dw_a_enc = Cat (0.U, dw_a_enc1)
|
val dw_a_enc = Cat (0.U, dw_a_enc1)
|
||||||
val dw_b_enc = Cat (0.U, dw_b_enc1)
|
val dw_b_enc = Cat (0.U, dw_b_enc1)
|
||||||
|
|
||||||
val dw_shortq_raw = Cat(0.U,dw_b_enc) - Cat(0.U,dw_a_enc) + 1.U(7.W)
|
val dw_shortq_raw = Cat(0.U,dw_b_enc) - Cat(0.U,dw_a_enc) + 1.U(7.W)
|
||||||
val shortq = Mux(dw_shortq_raw(6).asBool(),0.U,dw_shortq_raw(5,0))
|
val shortq = Mux(dw_shortq_raw(6).asBool(),0.U,dw_shortq_raw(5,0))
|
||||||
shortq_enable := valid_ff & !shortq(5) & !(shortq(4,2) === "b111".U) & !io.cancel
|
shortq_enable := valid_ff & !shortq(5) & !(shortq(4,2) === "b111".U) & !io.cancel
|
||||||
val list = Array(27,27,27,27,27,27,24,24,24,21,21,21,18,18,18,15,15,15,12,12,12,9,9,9,6,6,6,3,0,0,0,0)
|
val list = Array(27,27,27,27,27,27,24,24,24,21,21,21,18,18,18,15,15,15,12,12,12,9,9,9,6,6,6,3,0,0,0,0)
|
||||||
shortq_decode := Mux1H((31 to 0 by -1).map(i=> (shortq === i.U) -> list(i).U))
|
shortq_decode := Mux1H((31 to 0 by -1).map(i=> (shortq === i.U) -> list(i).U))
|
||||||
shortq_shift := Mux(!shortq_enable,0.U,shortq_decode)
|
shortq_shift := Mux(!shortq_enable,0.U,shortq_decode)
|
||||||
b_ff := Cat(b_ff1(32),b_ff1(32),b_ff1(32),b_ff1(32),b_ff1)
|
b_ff := Cat(b_ff1(32),b_ff1(32),b_ff1(32),b_ff1(32),b_ff1)
|
||||||
valid_ff := rvdffe(valid_ff_in, misc_enable,clock,io.scan_mode)
|
valid_ff := rvdffe(valid_ff_in, misc_enable,clock,io.scan_mode)
|
||||||
control_ff := rvdffe(control_in, misc_enable,clock,io.scan_mode)
|
control_ff := rvdffe(control_in, misc_enable,clock,io.scan_mode)
|
||||||
by_zero_case_ff := rvdffe(by_zero_case,misc_enable,clock,io.scan_mode)
|
by_zero_case_ff := rvdffe(by_zero_case,misc_enable,clock,io.scan_mode)
|
||||||
shortq_enable_ff := rvdffe(shortq_enable, misc_enable,clock,io.scan_mode)
|
shortq_enable_ff := rvdffe(shortq_enable, misc_enable,clock,io.scan_mode)
|
||||||
shortq_shift_ff := rvdffe(shortq_shift, misc_enable,clock,io.scan_mode)
|
shortq_shift_ff := rvdffe(shortq_shift, misc_enable,clock,io.scan_mode)
|
||||||
finish_ff := rvdffe(finish, misc_enable,clock,io.scan_mode)
|
finish_ff := rvdffe(finish, misc_enable,clock,io.scan_mode)
|
||||||
count_ff := rvdffe(count_in, misc_enable,clock,io.scan_mode)
|
count_ff := rvdffe(count_in, misc_enable,clock,io.scan_mode)
|
||||||
|
|
||||||
a_ff := rvdffe(a_in, a_enable,clock,io.scan_mode)
|
a_ff := rvdffe(a_in, a_enable,clock,io.scan_mode)
|
||||||
b_ff1 := rvdffe(b_in(32,0), b_enable,clock,io.scan_mode)
|
b_ff1 := rvdffe(b_in(32,0), b_enable,clock,io.scan_mode)
|
||||||
r_ff := rvdffe(r_in, rq_enable,clock,io.scan_mode)
|
r_ff := rvdffe(r_in, rq_enable,clock,io.scan_mode)
|
||||||
q_ff := rvdffe(q_in, rq_enable,clock,io.scan_mode)
|
q_ff := rvdffe(q_in, rq_enable,clock,io.scan_mode)
|
||||||
|
|
||||||
}
|
}
|
||||||
/////////////////////////////////////////////// 4 BIT FULL DIVIDER//////////////////////////////////
|
/////////////////////////////////////////////// 4 BIT FULL DIVIDER//////////////////////////////////
|
||||||
class exu_div_new_4bit_fullshortq extends Module with RequireAsyncReset with lib {
|
class exu_div_new_4bit_fullshortq extends Module with RequireAsyncReset with lib {
|
||||||
val io = IO(new Bundle {
|
val io = IO(new Bundle {
|
||||||
val scan_mode = Input(Bool())
|
val scan_mode = Input(Bool())
|
||||||
val cancel = Input(Bool())
|
val cancel = Input(Bool())
|
||||||
val valid_in = Input(Bool())
|
val valid_in = Input(Bool())
|
||||||
val signed_in = Input(Bool())
|
val signed_in = Input(Bool())
|
||||||
val rem_in = Input(Bool())
|
val rem_in = Input(Bool())
|
||||||
val dividend_in = Input(UInt(32.W))
|
val dividend_in = Input(UInt(32.W))
|
||||||
val divisor_in = Input(UInt(32.W))
|
val divisor_in = Input(UInt(32.W))
|
||||||
val data_out = Output(UInt(32.W))
|
val data_out = Output(UInt(32.W))
|
||||||
val valid_out = Output(UInt(1.W))
|
val valid_out = Output(UInt(1.W))
|
||||||
})
|
})
|
||||||
|
|
||||||
val valid_ff = WireInit(Bool(),init=false.B)
|
val valid_ff = WireInit(Bool(),init=false.B)
|
||||||
|
|
@ -774,7 +773,7 @@ class exu_div_new_4bit_fullshortq extends Module with RequireAsyncReset with lib
|
||||||
val shortq_shift = WireInit(0.U(5.W))
|
val shortq_shift = WireInit(0.U(5.W))
|
||||||
val shortq_decode = WireInit(0.U(5.W))
|
val shortq_decode = WireInit(0.U(5.W))
|
||||||
val shortq_shift_ff = WireInit(0.U(5.W))
|
val shortq_shift_ff = WireInit(0.U(5.W))
|
||||||
val valid_ff_in = io.valid_in & !io.cancel
|
val valid_ff_in = io.valid_in & !io.cancel
|
||||||
val control_in = Cat((!io.valid_in & control_ff(2)) | (io.valid_in & io.signed_in & io.dividend_in(31)), (!io.valid_in & control_ff(1)) | (io.valid_in & io.signed_in & io.divisor_in(31)), (!io.valid_in & control_ff(0)) | (io.valid_in & io.rem_in))
|
val control_in = Cat((!io.valid_in & control_ff(2)) | (io.valid_in & io.signed_in & io.dividend_in(31)), (!io.valid_in & control_ff(1)) | (io.valid_in & io.signed_in & io.divisor_in(31)), (!io.valid_in & control_ff(0)) | (io.valid_in & io.rem_in))
|
||||||
val dividend_sign_ff = control_ff(2)
|
val dividend_sign_ff = control_ff(2)
|
||||||
val divisor_sign_ff = control_ff(1)
|
val divisor_sign_ff = control_ff(1)
|
||||||
|
|
@ -798,22 +797,22 @@ class exu_div_new_4bit_fullshortq extends Module with RequireAsyncReset with lib
|
||||||
val b_enable = io.valid_in | b_twos_comp
|
val b_enable = io.valid_in | b_twos_comp
|
||||||
val rq_enable = io.valid_in | valid_ff | running_state
|
val rq_enable = io.valid_in | valid_ff | running_state
|
||||||
val r_sign_sel = valid_ff & dividend_sign_ff & !by_zero_case
|
val r_sign_sel = valid_ff & dividend_sign_ff & !by_zero_case
|
||||||
val r_adder_sel = (0 to 15 ).map(i=> (running_state & (quotient_new === i.asUInt) & !shortq_enable_ff))
|
val r_adder_sel = (0 to 15 ).map(i=> (running_state & (quotient_new === i.asUInt) & !shortq_enable_ff))
|
||||||
val adder1_out = Cat(r_ff(30,0),a_ff(31,28)) + b_ff(34,0)
|
val adder1_out = Cat(r_ff(30,0),a_ff(31,28)) + b_ff(34,0)
|
||||||
val adder2_out = Cat(r_ff(31,0),a_ff(31,28)) + Cat(b_ff(34,0),0.U)
|
val adder2_out = Cat(r_ff(31,0),a_ff(31,28)) + Cat(b_ff(34,0),0.U)
|
||||||
val adder3_out = Cat(r_ff(32,0),a_ff(31,28)) + Cat(b_ff(35,0),0.U) + b_ff(36,0)
|
val adder3_out = Cat(r_ff(32,0),a_ff(31,28)) + Cat(b_ff(35,0),0.U) + b_ff(36,0)
|
||||||
val adder4_out = Cat(r_ff(32),r_ff(32,0),a_ff(31,28)) + Cat(b_ff(35,0),0.U(2.W))
|
val adder4_out = Cat(r_ff(32),r_ff(32,0),a_ff(31,28)) + Cat(b_ff(35,0),0.U(2.W))
|
||||||
val adder5_out = Cat(r_ff(32),r_ff(32,0),a_ff(31,28)) + Cat(b_ff(35,0),0.U(2.W)) + b_ff
|
val adder5_out = Cat(r_ff(32),r_ff(32,0),a_ff(31,28)) + Cat(b_ff(35,0),0.U(2.W)) + b_ff
|
||||||
val adder6_out = Cat(r_ff(32),r_ff(32,0),a_ff(31,28)) + Cat(b_ff(35,0),0.U(2.W)) + Cat(b_ff(36,0),0.U)
|
val adder6_out = Cat(r_ff(32),r_ff(32,0),a_ff(31,28)) + Cat(b_ff(35,0),0.U(2.W)) + Cat(b_ff(36,0),0.U)
|
||||||
val adder7_out = Cat(r_ff(32),r_ff(32,0),a_ff(31,28)) + Cat(b_ff(35,0),0.U(2.W)) + Cat(b_ff(36,0),0.U) + b_ff
|
val adder7_out = Cat(r_ff(32),r_ff(32,0),a_ff(31,28)) + Cat(b_ff(35,0),0.U(2.W)) + Cat(b_ff(36,0),0.U) + b_ff
|
||||||
val adder8_out = Cat(r_ff(32),r_ff(32,0),a_ff(31,28)) + Cat(b_ff(34,0),0.U(3.W))
|
val adder8_out = Cat(r_ff(32),r_ff(32,0),a_ff(31,28)) + Cat(b_ff(34,0),0.U(3.W))
|
||||||
val adder9_out = Cat(r_ff(32),r_ff(32,0),a_ff(31,28)) + Cat(b_ff(34,0),0.U(3.W)) + b_ff
|
val adder9_out = Cat(r_ff(32),r_ff(32,0),a_ff(31,28)) + Cat(b_ff(34,0),0.U(3.W)) + b_ff
|
||||||
val adder10_out = Cat(r_ff(32),r_ff(32,0),a_ff(31,28)) + Cat(b_ff(34,0),0.U(3.W)) + Cat(b_ff(36,0),0.U)
|
val adder10_out = Cat(r_ff(32),r_ff(32,0),a_ff(31,28)) + Cat(b_ff(34,0),0.U(3.W)) + Cat(b_ff(36,0),0.U)
|
||||||
val adder11_out = Cat(r_ff(32),r_ff(32,0),a_ff(31,28)) + Cat(b_ff(34,0),0.U(3.W)) + Cat(b_ff(36,0),0.U) + b_ff
|
val adder11_out = Cat(r_ff(32),r_ff(32,0),a_ff(31,28)) + Cat(b_ff(34,0),0.U(3.W)) + Cat(b_ff(36,0),0.U) + b_ff
|
||||||
val adder12_out = Cat(r_ff(32),r_ff(32,0),a_ff(31,28)) + Cat(b_ff(34,0),0.U(3.W)) + Cat(b_ff(35,0),0.U(2.W))
|
val adder12_out = Cat(r_ff(32),r_ff(32,0),a_ff(31,28)) + Cat(b_ff(34,0),0.U(3.W)) + Cat(b_ff(35,0),0.U(2.W))
|
||||||
val adder13_out = Cat(r_ff(32),r_ff(32,0),a_ff(31,28)) + Cat(b_ff(34,0),0.U(3.W)) + Cat(b_ff(35,0),0.U(2.W)) + b_ff
|
val adder13_out = Cat(r_ff(32),r_ff(32,0),a_ff(31,28)) + Cat(b_ff(34,0),0.U(3.W)) + Cat(b_ff(35,0),0.U(2.W)) + b_ff
|
||||||
val adder14_out = Cat(r_ff(32),r_ff(32,0),a_ff(31,28)) + Cat(b_ff(34,0),0.U(3.W)) + Cat(b_ff(35,0),0.U(2.W)) + Cat(b_ff(36,0),0.U)
|
val adder14_out = Cat(r_ff(32),r_ff(32,0),a_ff(31,28)) + Cat(b_ff(34,0),0.U(3.W)) + Cat(b_ff(35,0),0.U(2.W)) + Cat(b_ff(36,0),0.U)
|
||||||
val adder15_out = Cat(r_ff(32),r_ff(32,0),a_ff(31,28)) + Cat(b_ff(34,0),0.U(3.W)) + Cat(b_ff(35,0),0.U(2.W)) + Cat(b_ff(36,0),0.U) + b_ff
|
val adder15_out = Cat(r_ff(32),r_ff(32,0),a_ff(31,28)) + Cat(b_ff(34,0),0.U(3.W)) + Cat(b_ff(35,0),0.U(2.W)) + Cat(b_ff(36,0),0.U) + b_ff
|
||||||
|
|
||||||
quotient_raw := Cat(
|
quotient_raw := Cat(
|
||||||
(!adder15_out(37) ^ dividend_sign_ff) | ((a_ff(27,0) === 0.U) & (adder15_out === 0.U)),
|
(!adder15_out(37) ^ dividend_sign_ff) | ((a_ff(27,0) === 0.U) & (adder15_out === 0.U)),
|
||||||
|
|
@ -834,29 +833,24 @@ class exu_div_new_4bit_fullshortq extends Module with RequireAsyncReset with lib
|
||||||
|
|
||||||
quotient_new := Cat(
|
quotient_new := Cat(
|
||||||
(Mux1H((8 to 14).map(i=> (quotient_raw(15,i)=== Cat(Fill(15-i,0.U),1.U)).asBool -> 1.U)) | (quotient_raw(15)===1.U)),
|
(Mux1H((8 to 14).map(i=> (quotient_raw(15,i)=== Cat(Fill(15-i,0.U),1.U)).asBool -> 1.U)) | (quotient_raw(15)===1.U)),
|
||||||
|
Mux1H (Seq(( quotient_raw(15,4) === "b000000000001".U(12.W)) -> 1.U, ( quotient_raw(15,5) === "b00000000001".U(11.W)) -> 1.U, ( quotient_raw(15,6) === "b0000000001".U(10.W)) -> 1.U, ( quotient_raw(15,7) === "b000000001".U(9.W)) -> 1.U,
|
||||||
( quotient_raw(15,4) === "b000000000001".U(12.W))| ( quotient_raw(15,5) === "b00000000001".U(11.W)) | ( quotient_raw(15,6) === "b0000000001".U(10.W)) |
|
( quotient_raw(15,12)=== "b0001".U(4.W)) -> 1.U, ( quotient_raw(15,13)=== "b001".U(3.W)) -> 1.U, ( quotient_raw(15,14)=== "b01".U(2.W)) -> 1.U, ( quotient_raw(15) === "b1".U) -> 1.U)),
|
||||||
( quotient_raw(15,7) === "b000000001".U(9.W)) | ( quotient_raw(15,12)=== "b0001".U(4.W)) | ( quotient_raw(15,13)=== "b001".U(3.W)) |
|
Mux1H(Seq(( quotient_raw(15,2) === "b00000000000001".U(14.W)) -> 1.U, ( quotient_raw(15,3) === "b0000000000001".U(13.W)) -> 1.U, ( quotient_raw(15,6) === "b0000000001".U(10.W)) -> 1.U, ( quotient_raw(15,7) === "b000000001".U(9.W)) -> 1.U,
|
||||||
( quotient_raw(15,14)=== "b01".U(2.W)) | ( quotient_raw(15) === "b1".U),
|
( quotient_raw(15,10)=== "b000001".U(6.W)) -> 1.U, ( quotient_raw(15,11)=== "b00001".U(5.W)) -> 1.U, ( quotient_raw(15,14)=== "b01".U(2.W)) -> 1.U, ( quotient_raw(15) === "b1".U) -> 1.U)),
|
||||||
|
|
||||||
( quotient_raw(15,2) === "b00000000000001".U(14.W))| ( quotient_raw(15,3) === "b0000000000001".U(13.W)) | ( quotient_raw(15,6) === "b0000000001".U(10.W)) |
|
|
||||||
( quotient_raw(15,7) === "b000000001".U(9.W)) | ( quotient_raw(15,10)=== "b000001".U(6.W)) | ( quotient_raw(15,11)=== "b00001".U(5.W)) |
|
|
||||||
( quotient_raw(15,14)=== "b01".U(2.W)) | ( quotient_raw(15) === "b1".U),
|
|
||||||
|
|
||||||
(Mux1H((1 to 13 by 2).map(i=> (quotient_raw(15,i)=== Cat(Fill(15-i,0.U),1.U)).asBool -> 1.U)) | (quotient_raw(15)===1.U) ))
|
(Mux1H((1 to 13 by 2).map(i=> (quotient_raw(15,i)=== Cat(Fill(15-i,0.U),1.U)).asBool -> 1.U)) | (quotient_raw(15)===1.U) ))
|
||||||
val twos_comp_in = Mux1H(Seq (
|
val twos_comp_in = Mux1H(Seq (
|
||||||
twos_comp_q_sel -> q_ff,
|
twos_comp_q_sel -> q_ff,
|
||||||
twos_comp_b_sel -> b_ff(31,0)
|
twos_comp_b_sel -> b_ff(31,0)
|
||||||
))
|
))
|
||||||
val twos_comp_out = rvtwoscomp(twos_comp_in)
|
val twos_comp_out = rvtwoscomp(twos_comp_in)
|
||||||
val a_in = Mux1H(Seq (
|
val a_in = Mux1H(Seq (
|
||||||
(!a_shift & !shortq_enable_ff).asBool -> io.dividend_in(31,0),
|
(!a_shift & !shortq_enable_ff).asBool -> io.dividend_in(31,0),
|
||||||
a_shift -> Cat(a_ff(27,0),0.U(4.W)),
|
a_shift -> Cat(a_ff(27,0),0.U(4.W)),
|
||||||
shortq_enable_ff -> ar_shifted(31,0)
|
shortq_enable_ff -> ar_shifted(31,0)
|
||||||
))
|
))
|
||||||
val b_in = Mux1H(Seq (
|
val b_in = Mux1H(Seq (
|
||||||
!b_twos_comp -> Cat(io.signed_in & io.divisor_in(31),io.divisor_in(31,0)),
|
!b_twos_comp -> Cat(io.signed_in & io.divisor_in(31),io.divisor_in(31,0)),
|
||||||
b_twos_comp -> Cat(!divisor_sign_ff,twos_comp_out(31,0))
|
b_twos_comp -> Cat(!divisor_sign_ff,twos_comp_out(31,0))
|
||||||
))
|
))
|
||||||
val r_in = Mux1H (Seq(
|
val r_in = Mux1H (Seq(
|
||||||
r_sign_sel -> Fill(33,1.U),
|
r_sign_sel -> Fill(33,1.U),
|
||||||
|
|
@ -880,15 +874,15 @@ class exu_div_new_4bit_fullshortq extends Module with RequireAsyncReset with lib
|
||||||
by_zero_case -> Cat(0.U,a_ff(31,0))
|
by_zero_case -> Cat(0.U,a_ff(31,0))
|
||||||
))
|
))
|
||||||
val q_in = Mux1H (Seq(
|
val q_in = Mux1H (Seq(
|
||||||
!valid_ff -> Cat(q_ff(27,0),quotient_new),
|
!valid_ff -> Cat(q_ff(27,0),quotient_new),
|
||||||
smallnum_case -> Cat(0.U(28.W),smallnum),
|
smallnum_case -> Cat(0.U(28.W),smallnum),
|
||||||
by_zero_case -> Fill(32,1.U)
|
by_zero_case -> Fill(32,1.U)
|
||||||
))
|
))
|
||||||
io.valid_out := finish_ff & !io.cancel
|
io.valid_out := finish_ff & !io.cancel
|
||||||
io.data_out := Mux1H(Seq(
|
io.data_out := Mux1H(Seq(
|
||||||
(!rem_ff & !twos_comp_q_sel).asBool() -> q_ff,
|
(!rem_ff & !twos_comp_q_sel).asBool() -> q_ff,
|
||||||
rem_ff -> r_ff(31,0),
|
rem_ff -> r_ff(31,0),
|
||||||
twos_comp_q_sel -> twos_comp_out
|
twos_comp_q_sel -> twos_comp_out
|
||||||
))
|
))
|
||||||
def pat1(x : List[Int], y : List[Int]) = {
|
def pat1(x : List[Int], y : List[Int]) = {
|
||||||
val pat_a = (0 until x.size).map(i=> if(x(i)>=0) a_ff(x(i)) else !a_ff(x(i).abs)).reduce(_&_)
|
val pat_a = (0 until x.size).map(i=> if(x(i)>=0) a_ff(x(i)) else !a_ff(x(i).abs)).reduce(_&_)
|
||||||
|
|
@ -916,33 +910,33 @@ class exu_div_new_4bit_fullshortq extends Module with RequireAsyncReset with lib
|
||||||
|
|
||||||
|
|
||||||
val shortq_dividend = Cat(dividend_sign_ff,a_ff(31,0))
|
val shortq_dividend = Cat(dividend_sign_ff,a_ff(31,0))
|
||||||
val a_enc = Module(new exu_div_cls)
|
val a_enc = Module(new exu_div_cls)
|
||||||
a_enc.io.operand := shortq_dividend
|
a_enc.io.operand := shortq_dividend
|
||||||
val dw_a_enc1 = a_enc.io.cls
|
val dw_a_enc1 = a_enc.io.cls
|
||||||
val b_enc = Module(new exu_div_cls)
|
val b_enc = Module(new exu_div_cls)
|
||||||
b_enc.io.operand := b_ff(32,0)
|
b_enc.io.operand := b_ff(32,0)
|
||||||
val dw_b_enc1 = b_enc.io.cls
|
val dw_b_enc1 = b_enc.io.cls
|
||||||
val dw_a_enc = Cat (0.U, dw_a_enc1)
|
val dw_a_enc = Cat (0.U, dw_a_enc1)
|
||||||
val dw_b_enc = Cat (0.U, dw_b_enc1)
|
val dw_b_enc = Cat (0.U, dw_b_enc1)
|
||||||
val dw_shortq_raw = Cat(0.U,dw_b_enc) - Cat(0.U,dw_a_enc) + 1.U(7.W)
|
val dw_shortq_raw = Cat(0.U,dw_b_enc) - Cat(0.U,dw_a_enc) + 1.U(7.W)
|
||||||
val shortq = Mux(dw_shortq_raw(6).asBool(),0.U,dw_shortq_raw(5,0))
|
val shortq = Mux(dw_shortq_raw(6).asBool(),0.U,dw_shortq_raw(5,0))
|
||||||
shortq_enable := valid_ff & !shortq(5) & !(shortq(4,2) === "b111".U) & !io.cancel
|
shortq_enable := valid_ff & !shortq(5) & !(shortq(4,2) === "b111".U) & !io.cancel
|
||||||
val list = Array(28,28,28,28,24,24,24,24,20,20,20,20,16,16,16,16,12,12,12,12,8,8,8,8,4,4,4,4,0,0,0,0)
|
val list = Array(28,28,28,28,24,24,24,24,20,20,20,20,16,16,16,16,12,12,12,12,8,8,8,8,4,4,4,4,0,0,0,0)
|
||||||
shortq_decode := Mux1H((31 to 0 by -1).map(i=> (shortq === i.U) -> list(i).U))
|
shortq_decode := Mux1H((31 to 0 by -1).map(i=> (shortq === i.U) -> list(i).U))
|
||||||
shortq_shift := Mux(!shortq_enable,0.U,shortq_decode)
|
shortq_shift := Mux(!shortq_enable,0.U,shortq_decode)
|
||||||
b_ff := Cat(b_ff1(32),b_ff1(32),b_ff1(32),b_ff1(32),b_ff1(32),b_ff1)
|
b_ff := Cat(b_ff1(32),b_ff1(32),b_ff1(32),b_ff1(32),b_ff1(32),b_ff1)
|
||||||
valid_ff := rvdffe(valid_ff_in, misc_enable,clock,io.scan_mode)
|
valid_ff := rvdffe(valid_ff_in, misc_enable,clock,io.scan_mode)
|
||||||
control_ff := rvdffe(control_in, misc_enable,clock,io.scan_mode)
|
control_ff := rvdffe(control_in, misc_enable,clock,io.scan_mode)
|
||||||
by_zero_case_ff := rvdffe(by_zero_case,misc_enable,clock,io.scan_mode)
|
by_zero_case_ff := rvdffe(by_zero_case,misc_enable,clock,io.scan_mode)
|
||||||
shortq_enable_ff := rvdffe(shortq_enable, misc_enable,clock,io.scan_mode)
|
shortq_enable_ff := rvdffe(shortq_enable, misc_enable,clock,io.scan_mode)
|
||||||
shortq_shift_ff := rvdffe(shortq_shift, misc_enable,clock,io.scan_mode)
|
shortq_shift_ff := rvdffe(shortq_shift, misc_enable,clock,io.scan_mode)
|
||||||
finish_ff := rvdffe(finish, misc_enable,clock,io.scan_mode)
|
finish_ff := rvdffe(finish, misc_enable,clock,io.scan_mode)
|
||||||
count_ff := rvdffe(count_in, misc_enable,clock,io.scan_mode)
|
count_ff := rvdffe(count_in, misc_enable,clock,io.scan_mode)
|
||||||
|
|
||||||
a_ff := rvdffe(a_in, a_enable,clock,io.scan_mode)
|
a_ff := rvdffe(a_in, a_enable,clock,io.scan_mode)
|
||||||
b_ff1 := rvdffe(b_in(32,0), b_enable,clock,io.scan_mode)
|
b_ff1 := rvdffe(b_in(32,0), b_enable,clock,io.scan_mode)
|
||||||
r_ff := rvdffe(r_in, rq_enable,clock,io.scan_mode)
|
r_ff := rvdffe(r_in, rq_enable,clock,io.scan_mode)
|
||||||
q_ff := rvdffe(q_in, rq_enable,clock,io.scan_mode)
|
q_ff := rvdffe(q_in, rq_enable,clock,io.scan_mode)
|
||||||
|
|
||||||
}
|
}
|
||||||
class exu_div_cls extends Module{
|
class exu_div_cls extends Module{
|
||||||
|
|
@ -957,5 +951,5 @@ class exu_div_cls extends Module{
|
||||||
|
|
||||||
when(io.operand(31,0) === "hffffffff".U) { cls_ones := 31.U}
|
when(io.operand(31,0) === "hffffffff".U) { cls_ones := 31.U}
|
||||||
.otherwise{cls_ones := Mux1H((1 until 32).map(i=> (io.operand(31,31-i) === Cat(Fill(i,1.U),0.U)).asBool -> (i-1).U ))}
|
.otherwise{cls_ones := Mux1H((1 until 32).map(i=> (io.operand(31,31-i) === Cat(Fill(i,1.U),0.U)).asBool -> (i-1).U ))}
|
||||||
io.cls := Mux(io.operand(32),cls_ones,cls_zeros)
|
io.cls := Mux(io.operand(32),cls_ones,cls_zeros)
|
||||||
}
|
}
|
||||||
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Reference in New Issue