求助~~ DC后slack是负的怎么解决呢

ole · 发表于 2014-3-1 10:20:06

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本帖最后由 ole 于 2014-3-1 10:42 编辑

还是第一次发帖。。下面是timing report中的两条具有代表性的路径
（1）

Startpoint: u_amber/u_decode/o_rs_sel_reg_0_

(rising edge-triggered flip-flopclocked by sysclk)

Endpoint: u_amber/u_execute/R_2533

(rising edge-triggered flip-flopclocked by sysclk)

Path Group: sysclk

Path Type: max

Des/Clust/Port Wire Load Model Library

------------------------------------------------

system 1000000 saed32hvt_tt1p05v25c

a25_core 280000 saed32hvt_tt1p05v25c

a25_register_bank 35000 saed32hvt_tt1p05v25c

a25_execute 35000 saed32hvt_tt1p05v25c

a25_barrel_shift 8000 saed32hvt_tt1p05v25c

a25_alu 8000 saed32hvt_tt1p05v25c

Point Fanout Cap Trans Incr Path

----------------------------------------------------------------------------------------------

clock sysclk (rise edge) 0.0000 0.0000

clock network delay (ideal) 0.0000 0.0000

u_amber/u_decode/o_rs_sel_reg_0_/CLK(DFFX1_HVT) 0.0000 0.0000 # 0.0000 r

u_amber/u_decode/o_rs_sel_reg_0_/Q (DFFX1_HVT) 0.0302 0.1396 0.1396 r

u_amber/u_decode/o_rs_sel[0] (net) 4 2.2337 0.0000 0.1396 r

u_amber/u_decode/o_rs_sel[0](a25_decode) 0.0000 0.1396 r

u_amber/rs_sel[0] (net) 2.2337 0.0000 0.1396 r

u_amber/u_execute/i_rs_sel[0](a25_execute) 0.0000 0.1396 r

u_amber/u_execute/i_rs_sel[0] (net) 2.2337 0.0000 0.1396 r

u_amber/u_execute/u_register_bank/i_rs_sel[0](a25_register_bank) 0.0000 0.1396 r

u_amber/u_execute/u_register_bank/i_rs_sel[0](net) 2.2337 0.0000 0.1396 r

u_amber/u_execute/u_register_bank/U1025/A(INVX0_HVT) 0.0302 0.1940 0.3336 r

u_amber/u_execute/u_register_bank/U1025/Y(INVX0_HVT) 0.0295 0.0331 0.3667 f

u_amber/u_execute/u_register_bank/n3386(net) 2 1.1615 0.0000 0.3667 f

u_amber/u_execute/u_register_bank/U921/A2(AND2X1_HVT) 0.0295 0.0126 0.3792 f

u_amber/u_execute/u_register_bank/U921/Y(AND2X1_HVT) 0.0362 0.0614 0.4407 f

u_amber/u_execute/u_register_bank/n3397(net) 4 2.4148 0.0000 0.4407 f

u_amber/u_execute/u_register_bank/U260/A1(AND2X4_HVT) 0.0362 0.0168 0.4575 f

u_amber/u_execute/u_register_bank/U260/Y(AND2X4_HVT) 0.0687 0.1040 0.5615 f

u_amber/u_execute/u_register_bank/n103(net) 32 18.5903 0.0000 0.5615 f

u_amber/u_execute/u_register_bank/U333/A1(AO22X1_HVT) 0.0687 0.0628 0.6243 f

u_amber/u_execute/u_register_bank/U333/Y(AO22X1_HVT) 0.0276 0.0828 0.7070 f

u_amber/u_execute/u_register_bank/n142(net) 1 0.6456 0.0000 0.7070 f

u_amber/u_execute/u_register_bank/U334/A4(OR4X1_HVT) 0.0276 0.0130 0.7200 f

u_amber/u_execute/u_register_bank/U334/Y(OR4X1_HVT) 0.0178 0.0991 0.8191 f

u_amber/u_execute/u_register_bank/n3501(net) 1 0.6661 0.0000 0.8191 f

u_amber/u_execute/u_register_bank/U4439/A4(NOR4X1_HVT) 0.0178 0.0134 0.8325 f

u_amber/u_execute/u_register_bank/U4439/Y(NOR4X1_HVT) 0.0224 0.0811 0.9135 r

u_amber/u_execute/u_register_bank/n3510(net) 2 1.1275 0.0000 0.9135 r

u_amber/u_execute/u_register_bank/U4445/A1(NAND2X0_HVT) 0.0224 0.0131 0.9266 r

u_amber/u_execute/u_register_bank/U4445/Y(NAND2X0_HVT) 0.0378 0.0371 0.9637 f

u_amber/u_execute/u_register_bank/n3792(net) 1 0.5425 0.0000 0.9637 f

u_amber/u_execute/u_register_bank/U4734/A3(AO21X1_HVT) 0.0378 0.0109 0.9746 f

u_amber/u_execute/u_register_bank/U4734/Y(AO21X1_HVT) 0.0285 0.0508 1.0254 f

u_amber/u_execute/u_register_bank/o_rs[6](net) 2 1.0937 0.0000 1.0254 f

u_amber/u_execute/u_register_bank/o_rs[6](a25_register_bank) 0.0000 1.0254 f

u_amber/u_execute/reg_bank_rs[6] (net) 1.0937 0.0000 1.0254 f

u_amber/u_execute/U76/A1 (MUX21X1_HVT) 0.0285 0.0127 1.0380 f

u_amber/u_execute/U76/Y (MUX21X1_HVT) 0.0346 0.0753 1.1134 f

u_amber/u_execute/rs[6] (net) 1 0.6175 0.0000 1.1134 f

u_amber/u_execute/U931/A1 (AND2X1_HVT) 0.0346 0.0124 1.1258 f

u_amber/u_execute/U931/Y (AND2X1_HVT) 0.0223 0.0496 1.1754 f

u_amber/u_execute/shift_amount[6] (net) 1 0.6331 0.0000 1.1754 f

u_amber/u_execute/u_barrel_shift/i_shift_amount[6](a25_barrel_shift) 0.0000 1.1754 f

u_amber/u_execute/u_barrel_shift/i_shift_amount[6] (net) 0.6331 0.0000 1.1754 f

u_amber/u_execute/u_barrel_shift/U39/A1(OR2X1_HVT) 0.0223 0.0127 1.1881 f

u_amber/u_execute/u_barrel_shift/U39/Y(OR2X1_HVT) 0.0252 0.0526 1.2407 f

u_amber/u_execute/u_barrel_shift/n585(net) 2 1.2938 0.0000 1.2407 f

u_amber/u_execute/u_barrel_shift/U653/A2(OR2X2_HVT) 0.0252 0.0174 1.2581 f

u_amber/u_execute/u_barrel_shift/U653/Y(OR2X2_HVT) 0.0505 0.0703 1.3284 f

u_amber/u_execute/u_barrel_shift/n1094(net) 12 7.6254 0.0000 1.3284 f

u_amber/u_execute/u_barrel_shift/U83/A1(OR2X1_HVT) 0.0505 0.0299 1.3583 f

u_amber/u_execute/u_barrel_shift/U83/Y(OR2X1_HVT) 0.0243 0.0652 1.4235 f

u_amber/u_execute/u_barrel_shift/n535(net) 2 1.1364 0.0000 1.4235 f

u_amber/u_execute/u_barrel_shift/U652/A2(OAI21X2_HVT) 0.0243 0.0141 1.4376 f

u_amber/u_execute/u_barrel_shift/U652/Y(OAI21X2_HVT) 0.0496 0.1115 1.5491 r

u_amber/u_execute/u_barrel_shift/n404(net) 15 8.7966 0.0000 1.5491 r

u_amber/u_execute/u_barrel_shift/U489/A(IBUFFX4_HVT) 0.0496 0.0304 1.5794 r

u_amber/u_execute/u_barrel_shift/U489/Y(IBUFFX4_HVT) 0.0276 0.0688 1.6482 f

u_amber/u_execute/u_barrel_shift/n362(net) 16 8.7696 0.0000 1.6482 f

u_amber/u_execute/u_barrel_shift/U56/A1(AND2X4_HVT) 0.0276 0.0363 1.6845 f

u_amber/u_execute/u_barrel_shift/U56/Y(AND2X4_HVT) 0.0537 0.0885 1.7730 f

u_amber/u_execute/u_barrel_shift/n2061(net) 21 11.9540 0.0000 1.7730 f

u_amber/u_execute/u_barrel_shift/U908/A1(NAND2X0_HVT) 0.0537 0.0436 1.8166 f

u_amber/u_execute/u_barrel_shift/U908/Y(NAND2X0_HVT) 0.0448 0.0392 1.8559 r

u_amber/u_execute/u_barrel_shift/n610(net) 1 0.4677 0.0000 1.8559 r

u_amber/u_execute/u_barrel_shift/U910/A3(AND4X1_HVT) 0.0448 0.0103 1.8661 r

u_amber/u_execute/u_barrel_shift/U910/Y(AND4X1_HVT) 0.0401 0.1178 1.9840 r

u_amber/u_execute/u_barrel_shift/n616(net) 1 0.5402 0.0000 1.9840 r

u_amber/u_execute/u_barrel_shift/U914/A1(AND4X1_HVT) 0.0401 0.0118 1.9958 r

u_amber/u_execute/u_barrel_shift/U914/Y(AND4X1_HVT) 0.0410 0.0931 2.0889 r

u_amber/u_execute/u_barrel_shift/n620(net) 1 0.6831 0.0000 2.0889 r

u_amber/u_execute/u_barrel_shift/U918/A1(NAND4X0_HVT) 0.0410 0.0150 2.1039 r

u_amber/u_execute/u_barrel_shift/U918/Y(NAND4X0_HVT) 0.0804 0.0691 2.1730 f

u_amber/u_execute/u_barrel_shift/n632(net) 1 0.5651 0.0000 2.1730 f

u_amber/u_execute/u_barrel_shift/U930/A1(OR3X1_HVT) 0.0804 0.0124 2.1854 f

u_amber/u_execute/u_barrel_shift/U930/Y(OR3X1_HVT) 0.0285 0.0899 2.2753 f

u_amber/u_execute/u_barrel_shift/n633(net) 1 0.5630 0.0000 2.2753 f

u_amber/u_execute/u_barrel_shift/U931/A1(NAND2X0_HVT) 0.0285 0.0123 2.2876 f

u_amber/u_execute/u_barrel_shift/U931/Y(NAND2X0_HVT) 0.0530 0.0304 2.3180 r

u_amber/u_execute/u_barrel_shift/n656(net) 1 0.5706 0.0000 2.3180 r

u_amber/u_execute/u_barrel_shift/U69/A2(NAND3X0_HVT) 0.0530 0.0125 2.3305 r

u_amber/u_execute/u_barrel_shift/U69/Y(NAND3X0_HVT) 0.1031 0.1050 2.4355 f

u_amber/u_execute/u_barrel_shift/o_out[0](net) 3 1.6361 0.0000 2.4355 f

u_amber/u_execute/u_barrel_shift/o_out[0](a25_barrel_shift) 0.0000 2.4355 f

u_amber/u_execute/barrel_shift_out[0](net) 1.6361 0.0000 2.4355 f

u_amber/u_execute/u_alu/i_b_in[0](a25_alu) 0.0000 2.4355 f

u_amber/u_execute/u_alu/i_b_in[0] (net) 1.6361 0.0000 2.4355 f

u_amber/u_execute/u_alu/U369/A1(AO21X1_HVT) 0.1031 0.0144 2.4499 f

u_amber/u_execute/u_alu/U369/Y(AO21X1_HVT) 0.0437 0.1103 2.5602 f

u_amber/u_execute/u_alu/a[0] (net) 5 2.8155 0.0000 2.5602 f

u_amber/u_execute/u_alu/DP_OP_34J16_124_6843_U214/A2 (NOR2X0_HVT) 0.0437 0.0219 2.5822 f

u_amber/u_execute/u_alu/DP_OP_34J16_124_6843_U214/Y (NOR2X0_HVT) 0.0231 0.0728 2.6549 r

u_amber/u_execute/u_alu/DP_OP_34J16_124_6843_n172 (net) 3 1.6281 0.0000 2.6549 r

u_amber/u_execute/u_alu/U13/A2(OAI21X2_HVT) 0.0231 0.0156 2.6706 r

u_amber/u_execute/u_alu/U13/Y(OAI21X2_HVT) 0.0287 0.1053 2.7759 f

u_amber/u_execute/u_alu/DP_OP_34J16_124_6843_n171 (net) 2 1.1316 0.0000 2.7759 f

u_amber/u_execute/u_alu/U181/A1(AO21X1_HVT) 0.0287 0.0141 2.7900 f

u_amber/u_execute/u_alu/U181/Y(AO21X1_HVT) 0.0218 0.0606 2.8507 f

u_amber/u_execute/u_alu/n110 (net) 1 0.6012 0.0000 2.8507 f

u_amber/u_execute/u_alu/DP_OP_34J16_124_6843_U194/A1(AOI21X1_HVT) 0.0218 0.0132 2.8638 f

u_amber/u_execute/u_alu/DP_OP_34J16_124_6843_U194/Y (AOI21X1_HVT) 0.0224 0.0810 2.9448 r

u_amber/u_execute/u_alu/DP_OP_34J16_124_6843_n160 (net) 1 1.3040 0.0000 2.9448 r

u_amber/u_execute/u_alu/U172/A1(XOR2X2_HVT) 0.0224 0.0286 2.9734 r

u_amber/u_execute/u_alu/U172/Y(XOR2X2_HVT) 0.0265 0.0872 3.0606 f

u_amber/u_execute/u_alu/n104 (net) 1 0.6329 0.0000 3.0606 f

u_amber/u_execute/u_alu/U173/A1(OR2X1_HVT) 0.0265 0.0139 3.0744 f

u_amber/u_execute/u_alu/U173/Y(OR2X1_HVT) 0.0206 0.0500 3.1244 f

u_amber/u_execute/u_alu/n441 (net) 1 0.6277 0.0000 3.1244 f

u_amber/u_execute/u_alu/U318/A1(NAND3X0_HVT) 0.0206 0.0138 3.1382 f

u_amber/u_execute/u_alu/U318/Y(NAND3X0_HVT) 0.0494 0.0302 3.1684 r

u_amber/u_execute/u_alu/o_out[3] (net) 3 1.5115 0.0000 3.1684 r

u_amber/u_execute/u_alu/o_out[3](a25_alu) 0.0000 3.1684 r

u_amber/u_execute/alu_out_pc_filtered[3](net) 1.5115 0.0000 3.1684 r

u_amber/u_execute/U1097/A1 (AO21X1_HVT) 0.0494 0.0139 3.1824 r

u_amber/u_execute/U1097/Y (AO21X1_HVT) 0.0343 0.0925 3.2749 r

u_amber/u_execute/C1_Z_3 (net) 1 1.0519 0.0000 3.2749 r

u_amber/u_execute/DP_OP_132J4_124_3115_U29/A0(HADDX1_HVT) 0.0343 0.0211 3.2960 r

u_amber/u_execute/DP_OP_132J4_124_3115_U29/C1(HADDX1_HVT) 0.0325 0.0775 3.3735 r

u_amber/u_execute/DP_OP_132J4_124_3115_n28(net) 1 1.0329 0.0000 3.3735 r

u_amber/u_execute/DP_OP_132J4_124_3115_U28/B0(HADDX1_HVT) 0.0325 0.0208 3.3943 r

u_amber/u_execute/DP_OP_132J4_124_3115_U28/C1(HADDX1_HVT) 0.0317 0.0701 3.4644 r

u_amber/u_execute/DP_OP_132J4_124_3115_n27(net) 1 1.0329 0.0000 3.4644 r

u_amber/u_execute/DP_OP_132J4_124_3115_U27/B0(HADDX1_HVT) 0.0317 0.0208 3.4851 r

u_amber/u_execute/DP_OP_132J4_124_3115_U27/C1(HADDX1_HVT) 0.0317 0.0698 3.5549 r

u_amber/u_execute/DP_OP_132J4_124_3115_n26(net) 1 1.0329 0.0000 3.5549 r

u_amber/u_execute/DP_OP_132J4_124_3115_U26/B0(HADDX1_HVT) 0.0317 0.0208 3.5756 r

u_amber/u_execute/DP_OP_132J4_124_3115_U26/C1(HADDX1_HVT) 0.0317 0.0698 3.6454 r

u_amber/u_execute/DP_OP_132J4_124_3115_n25(net) 1 1.0329 0.0000 3.6454 r

u_amber/u_execute/DP_OP_132J4_124_3115_U25/B0(HADDX1_HVT) 0.0317 0.0208 3.6662 r

u_amber/u_execute/DP_OP_132J4_124_3115_U25/C1(HADDX1_HVT) 0.0317 0.0698 3.7359 r

u_amber/u_execute/DP_OP_132J4_124_3115_n24(net) 1 1.0329 0.0000 3.7359 r

u_amber/u_execute/DP_OP_132J4_124_3115_U24/B0(HADDX1_HVT) 0.0317 0.0208 3.7567 r

u_amber/u_execute/DP_OP_132J4_124_3115_U24/C1(HADDX1_HVT) 0.0317 0.0698 3.8265 r

u_amber/u_execute/DP_OP_132J4_124_3115_n23(net) 1 1.0329 0.0000 3.8265 r

u_amber/u_execute/DP_OP_132J4_124_3115_U23/B0(HADDX1_HVT) 0.0317 0.0208 3.8472 r

u_amber/u_execute/DP_OP_132J4_124_3115_U23/C1(HADDX1_HVT) 0.0317 0.0698 3.9170 r

u_amber/u_execute/DP_OP_132J4_124_3115_n22(net) 1 1.0329 0.0000 3.9170 r

u_amber/u_execute/DP_OP_132J4_124_3115_U22/B0(HADDX1_HVT) 0.0317 0.0208 3.9377 r

u_amber/u_execute/DP_OP_132J4_124_3115_U22/C1(HADDX1_HVT) 0.0317 0.0698 4.0075 r

u_amber/u_execute/DP_OP_132J4_124_3115_n21(net) 1 1.0329 0.0000 4.0075 r

u_amber/u_execute/DP_OP_132J4_124_3115_U21/B0(HADDX1_HVT) 0.0317 0.0208 4.0283 r

u_amber/u_execute/DP_OP_132J4_124_3115_U21/C1(HADDX1_HVT) 0.0317 0.0698 4.0980 r

u_amber/u_execute/DP_OP_132J4_124_3115_n20(net) 1 1.0329 0.0000 4.0980 r

u_amber/u_execute/DP_OP_132J4_124_3115_U20/B0(HADDX1_HVT) 0.0317 0.0208 4.1188 r

u_amber/u_execute/DP_OP_132J4_124_3115_U20/C1(HADDX1_HVT) 0.0352 0.0737 4.1925 r

u_amber/u_execute/DP_OP_132J4_124_3115_n19(net) 2 1.5892 0.0000 4.1925 r

u_amber/u_execute/DP_OP_132J4_124_3115_U19/B0(HADDX1_HVT) 0.0352 0.0239 4.2165 r

u_amber/u_execute/DP_OP_132J4_124_3115_U19/C1(HADDX1_HVT) 0.0289 0.0678 4.2842 r

u_amber/u_execute/DP_OP_132J4_124_3115_n18(net) 1 0.6138 0.0000 4.2842 r

u_amber/u_execute/U190/A1 (AND2X1_HVT) 0.0289 0.0123 4.2966 r

u_amber/u_execute/U190/Y (AND2X1_HVT) 0.0246 0.0571 4.3536 r

u_amber/u_execute/DP_OP_132J4_124_3115_n17(net) 1 1.0329 0.0000 4.3536 r

u_amber/u_execute/DP_OP_132J4_124_3115_U17/B0(HADDX1_HVT) 0.0246 0.0208 4.3744 r

u_amber/u_execute/DP_OP_132J4_124_3115_U17/C1(HADDX1_HVT) 0.0317 0.0670 4.4414 r

u_amber/u_execute/DP_OP_132J4_124_3115_n16(net) 1 1.0329 0.0000 4.4414 r

u_amber/u_execute/DP_OP_132J4_124_3115_U16/B0(HADDX1_HVT) 0.0317 0.0208 4.4621 r

u_amber/u_execute/DP_OP_132J4_124_3115_U16/C1(HADDX1_HVT) 0.0317 0.0698 4.5319 r

u_amber/u_execute/DP_OP_132J4_124_3115_n15(net) 1 1.0329 0.0000 4.5319 r

u_amber/u_execute/DP_OP_132J4_124_3115_U15/B0(HADDX1_HVT) 0.0317 0.0208 4.5527 r

u_amber/u_execute/DP_OP_132J4_124_3115_U15/C1(HADDX1_HVT) 0.0317 0.0698 4.6224 r

u_amber/u_execute/DP_OP_132J4_124_3115_n14(net) 1 1.0329 0.0000 4.6224 r

u_amber/u_execute/DP_OP_132J4_124_3115_U14/B0(HADDX1_HVT) 0.0317 0.0208 4.6432 r

u_amber/u_execute/DP_OP_132J4_124_3115_U14/C1(HADDX1_HVT) 0.0317 0.0698 4.7130 r

u_amber/u_execute/DP_OP_132J4_124_3115_n13(net) 1 1.0329 0.0000 4.7130 r

u_amber/u_execute/DP_OP_132J4_124_3115_U13/B0(HADDX1_HVT) 0.0317 0.0208 4.7337 r

u_amber/u_execute/DP_OP_132J4_124_3115_U13/C1(HADDX1_HVT) 0.0317 0.0698 4.8035 r

u_amber/u_execute/DP_OP_132J4_124_3115_n12(net) 1 1.0329 0.0000 4.8035 r

u_amber/u_execute/DP_OP_132J4_124_3115_U12/B0(HADDX1_HVT) 0.0317 0.0208 4.8242 r

u_amber/u_execute/DP_OP_132J4_124_3115_U12/C1(HADDX1_HVT) 0.0317 0.0698 4.8940 r

u_amber/u_execute/DP_OP_132J4_124_3115_n11(net) 1 1.0329 0.0000 4.8940 r

u_amber/u_execute/DP_OP_132J4_124_3115_U11/B0(HADDX1_HVT) 0.0317 0.0208 4.9148 r

u_amber/u_execute/DP_OP_132J4_124_3115_U11/C1(HADDX1_HVT) 0.0317 0.0698 4.9845 r

u_amber/u_execute/DP_OP_132J4_124_3115_n10(net) 1 1.0329 0.0000 4.9845 r

u_amber/u_execute/DP_OP_132J4_124_3115_U10/B0(HADDX1_HVT) 0.0317 0.0208 5.0053 r

u_amber/u_execute/DP_OP_132J4_124_3115_U10/C1(HADDX1_HVT) 0.0317 0.0698 5.0751 r

u_amber/u_execute/DP_OP_132J4_124_3115_n9(net) 1 1.0329 0.0000 5.0751 r

u_amber/u_execute/DP_OP_132J4_124_3115_U9/B0(HADDX1_HVT) 0.0317 0.0208 5.0958 r

u_amber/u_execute/DP_OP_132J4_124_3115_U9/C1(HADDX1_HVT) 0.0317 0.0698 5.1656 r

u_amber/u_execute/DP_OP_132J4_124_3115_n8(net) 1 1.0329 0.0000 5.1656 r

u_amber/u_execute/DP_OP_132J4_124_3115_U8/B0(HADDX1_HVT) 0.0317 0.0208 5.1863 r

u_amber/u_execute/DP_OP_132J4_124_3115_U8/C1(HADDX1_HVT) 0.0317 0.0698 5.2561 r

u_amber/u_execute/DP_OP_132J4_124_3115_n7(net) 1 1.0329 0.0000 5.2561 r

u_amber/u_execute/DP_OP_132J4_124_3115_U7/B0(HADDX1_HVT) 0.0317 0.0208 5.2769 r

u_amber/u_execute/DP_OP_132J4_124_3115_U7/C1(HADDX1_HVT) 0.0317 0.0698 5.3466 r

u_amber/u_execute/DP_OP_132J4_124_3115_n6(net) 1 1.0329 0.0000 5.3466 r

u_amber/u_execute/DP_OP_132J4_124_3115_U6/B0(HADDX1_HVT) 0.0317 0.0208 5.3674 r

u_amber/u_execute/DP_OP_132J4_124_3115_U6/C1(HADDX1_HVT) 0.0317 0.0698 5.4372 r

u_amber/u_execute/DP_OP_132J4_124_3115_n5(net) 1 1.0329 0.0000 5.4372 r

u_amber/u_execute/DP_OP_132J4_124_3115_U5/B0(HADDX1_HVT) 0.0317 0.0208 5.4579 r

u_amber/u_execute/DP_OP_132J4_124_3115_U5/C1(HADDX1_HVT) 0.0317 0.0698 5.5277 r

u_amber/u_execute/DP_OP_132J4_124_3115_n4(net) 1 1.0329 0.0000 5.5277 r

u_amber/u_execute/DP_OP_132J4_124_3115_U4/B0(HADDX1_HVT) 0.0317 0.0208 5.5484 r

u_amber/u_execute/DP_OP_132J4_124_3115_U4/C1(HADDX1_HVT) 0.0317 0.0698 5.6182 r

u_amber/u_execute/DP_OP_132J4_124_3115_n3(net) 1 1.0329 0.0000 5.6182 r

u_amber/u_execute/DP_OP_132J4_124_3115_U3/B0(HADDX1_HVT) 0.0317 0.0208 5.6390 r

u_amber/u_execute/DP_OP_132J4_124_3115_U3/C1(HADDX1_HVT) 0.0317 0.0698 5.7087 r

u_amber/u_execute/DP_OP_132J4_124_3115_n2(net) 1 1.0329 0.0000 5.7087 r

u_amber/u_execute/DP_OP_132J4_124_3115_U2/B0(HADDX1_HVT) 0.0317 0.0208 5.7295 r

u_amber/u_execute/DP_OP_132J4_124_3115_U2/C1(HADDX1_HVT) 0.0314 0.0695 5.7989 r

u_amber/u_execute/DP_OP_132J4_124_3115_n1(net) 1 0.9915 0.0000 5.7989 r

u_amber/u_execute/DP_OP_132J4_124_3115_U1/A1(XOR2X1_HVT) 0.0314 0.0199 5.8189 r

u_amber/u_execute/DP_OP_132J4_124_3115_U1/Y(XOR2X1_HVT) 0.0305 0.1062 5.9250 f

u_amber/u_execute/C55_DATA4_31 (net) 1 0.5565 0.0000 5.9250 f

u_amber/u_execute/R_2533/D (DFFX1_HVT) 0.0305 0.0112 5.9362 f

data arrival time 5.9362

clock sysclk (rise edge) 5.0000 5.0000

clock network delay (ideal) 0.0000 5.0000

u_amber/u_execute/R_2533/CLK (DFFX1_HVT) 0.0000 5.0000 r

library setup time -0.0370 4.9630

data required time 4.9630

----------------------------------------------------------------------------------------------

data required time 4.9630

data arrival time -5.9362

----------------------------------------------------------------------------------------------

slack (VIOLATED) -0.9732

（2）

Startpoint:u_amber/u_mem/R_2532

(rising edge-triggered flip-flopclocked by sysclk)

Endpoint:u_amber/u_fetch/u_cache/address_r_reg_10_

(rising edge-triggered flip-flopclocked by sysclk)

Path Group: sysclk

Path Type: max

Des/Clust/Port Wire Load Model Library

------------------------------------------------

system 1000000 saed32hvt_tt1p05v25c

a25_mem 140000 saed32hvt_tt1p05v25c

a25_dcache 140000 saed32hvt_tt1p05v25c

a25_core 280000 saed32hvt_tt1p05v25c

a25_wishbone 8000 saed32hvt_tt1p05v25c

a25_fetch 140000 saed32hvt_tt1p05v25c

a25_icache 140000 saed32hvt_tt1p05v25c

Point Fanout Cap Trans Incr Path

----------------------------------------------------------------------------------------------

clock sysclk (rise edge) 0.0000 0.0000

clock network delay (ideal) 0.0000 0.0000

u_amber/u_mem/R_2532/CLK (DFFX2_HVT) 0.0000 0.0000 # 0.0000 r

u_amber/u_mem/R_2532/Q (DFFX2_HVT) 0.0499 0.1884 0.1884 f

u_amber/u_mem/N19 (net) 2 6.1938 0.0000 0.1884 f

u_amber/u_mem/U111/S1 (MUX41X1_HVT) 0.0499 0.7300 0.9184 f

u_amber/u_mem/U111/Y (MUX41X1_HVT) 0.0519 0.1325 1.0509 r

u_amber/u_mem/n344 (net) 1 0.7098 0.0000 1.0509 r

u_amber/u_mem/U34/A2 (OR2X1_HVT) 0.0519 0.1434 1.1943 r

u_amber/u_mem/U34/Y (OR2X1_HVT) 0.0236 0.0651 1.2594 r

u_amber/u_mem/n48 (net) 2 1.0197 0.0000 1.2594 r

u_amber/u_mem/U105/A2 (AND3X1_HVT) 0.0236 0.1232 1.3826 r

u_amber/u_mem/U105/Y (AND3X1_HVT) 0.0294 0.0770 1.4596 r

u_amber/u_mem/n47 (net) 1 0.5388 0.0000 1.4596 r

u_amber/u_mem/U100/A1 (AND4X1_HVT) 0.0294 0.1088 1.5685 r

u_amber/u_mem/U100/Y (AND4X1_HVT) 0.0401 0.0887 1.6572 r

u_amber/u_mem/n20 (net) 1 0.5532 0.0000 1.6572 r

u_amber/u_mem/U193/A2 (AND2X1_HVT) 0.0401 0.1117 1.7689 r

u_amber/u_mem/U193/Y (AND2X1_HVT) 0.0242 0.0685 1.8374 r

u_amber/u_mem/sel_cache_p (net) 2 1.0169 0.0000 1.8374 r

u_amber/u_mem/u_dcache/i_request(a25_dcache) 0.0000 1.8374 r

u_amber/u_mem/u_dcache/i_request (net) 1.0169 0.0000 1.8374 r

u_amber/u_mem/u_dcache/U300/A1(AO21X1_HVT) 0.0242 0.1290 1.9663 r

u_amber/u_mem/u_dcache/U300/Y(AO21X1_HVT) 0.0356 0.0852 2.0515 r

u_amber/u_mem/u_dcache/n39 (net) 3 1.4383 0.0000 2.0515 r

u_amber/u_mem/u_dcache/U93/A1(NAND3X2_HVT) 0.0356 0.1437 2.1952 r

u_amber/u_mem/u_dcache/U93/Y(NAND3X2_HVT) 0.0299 0.1060 2.3012 f

u_amber/u_mem/u_dcache/n610 (net) 5 2.7511 0.0000 2.3012 f

u_amber/u_mem/u_dcache/U182/A4(OAI221X1_HVT) 0.0299 0.1604 2.4616 f

u_amber/u_mem/u_dcache/U182/Y (OAI221X1_HVT) 0.0204 0.0878 2.5494 r

u_amber/u_mem/u_dcache/o_wb_req (net) 2 1.0323 0.0000 2.5494 r

u_amber/u_mem/u_dcache/o_wb_req(a25_dcache) 0.0000 2.5494 r

u_amber/u_mem/cached_wb_req (net) 1.0323 0.0000 2.5494 r

u_amber/u_mem/U120/A1 (AND2X1_HVT) 0.0204 0.1444 2.6938 r

u_amber/u_mem/U120/Y (AND2X1_HVT) 0.0247 0.0537 2.7475 r

u_amber/u_mem/o_wb_cached_req (net) 2 1.0505 0.0000 2.7475 r

u_amber/u_mem/o_wb_cached_req (a25_mem) 0.0000 2.7475 r

u_amber/dcache_wb_cached_req (net) 1.0505 0.0000 2.7475 r

u_amber/u_wishbone/i_dcache_cached_req(a25_wishbone) 0.0000 2.7475 r

u_amber/u_wishbone/i_dcache_cached_req(net) 1.0505 0.0000 2.7475 r

u_amber/u_wishbone/U305/A1 (AO21X1_HVT) 0.0247 0.1437 2.8912 r

u_amber/u_wishbone/U305/Y (AO21X1_HVT) 0.0405 0.0912 2.9824 r

u_amber/u_wishbone/n250 (net) 4 2.3064 0.0000 2.9824 r

u_amber/u_wishbone/U304/A4 (AO22X1_HVT) 0.0405 0.0170 2.9994 r

u_amber/u_wishbone/U304/Y (AO22X1_HVT) 0.0408 0.0906 3.0900 r

u_amber/u_wishbone/o_dcache_cached_ready(net) 4 2.0956 0.0000 3.0900 r

u_amber/u_wishbone/o_dcache_cached_ready(a25_wishbone) 0.0000 3.0900 r

u_amber/dcache_wb_cached_ready (net) 2.0956 0.0000 3.0900 r

u_amber/u_mem/i_wb_cached_ready(a25_mem) 0.0000 3.0900 r

u_amber/u_mem/i_wb_cached_ready (net) 2.0956 0.0000 3.0900 r

u_amber/u_mem/u_dcache/i_wb_ready(a25_dcache) 0.0000 3.0900 r

u_amber/u_mem/u_dcache/i_wb_ready (net) 2.0956 0.0000 3.0900 r

u_amber/u_mem/u_dcache/U144/A1(AND3X1_HVT) 0.0408 0.1807 3.2708 r

u_amber/u_mem/u_dcache/U144/Y (AND3X1_HVT) 0.0297 0.0732 3.3440 r

u_amber/u_mem/u_dcache/n611 (net) 1 0.5509 0.0000 3.3440 r

u_amber/u_mem/u_dcache/U146/A4(OA22X1_HVT) 0.0297 0.1113 3.4553 r

u_amber/u_mem/u_dcache/U146/Y(OA22X1_HVT) 0.0339 0.0717 3.5270 r

u_amber/u_mem/u_dcache/n616 (net) 2 1.0631 0.0000 3.5270 r

u_amber/u_mem/u_dcache/U65/A3(NAND3X0_HVT) 0.0339 0.1253 3.6523 r

u_amber/u_mem/u_dcache/U65/Y(NAND3X0_HVT) 0.0567 0.0680 3.7202 f

u_amber/u_mem/u_dcache/n617 (net) 1 0.4681 0.0000 3.7202 f

u_amber/u_mem/u_dcache/U161/A2(NAND2X0_HVT) 0.0567 0.0945 3.8148 f

u_amber/u_mem/u_dcache/U161/Y(NAND2X0_HVT) 0.0491 0.0579 3.8727 r

u_amber/u_mem/u_dcache/o_stall_BAR (net) 3 1.6669 0.0000 3.8727 r

u_amber/u_mem/u_dcache/o_stall_BAR(a25_dcache) 0.0000 3.8727 r

u_amber/u_mem/n17 (net) 1.6669 0.0000 3.8727 r

u_amber/u_mem/U184/A1 (AND2X1_HVT) 0.0491 0.1602 4.0329 r

u_amber/u_mem/U184/Y (AND2X1_HVT) 0.0253 0.0650 4.0979 r

u_amber/u_mem/o_wb_uncached_req (net) 2 0.9676 0.0000 4.0979 r

u_amber/u_mem/o_wb_uncached_req(a25_mem) 0.0000 4.0979 r

u_amber/dcache_wb_uncached_req (net) 0.9676 0.0000 4.0979 r

u_amber/u_wishbone/i_dcache_uncached_req(a25_wishbone) 0.0000 4.0979 r

u_amber/u_wishbone/i_dcache_uncached_req(net) 0.9676 0.0000 4.0979 r

u_amber/u_wishbone/U301/A1 (AO21X1_HVT) 0.0253 0.1437 4.2415 r

u_amber/u_wishbone/U301/Y (AO21X1_HVT) 0.0367 0.0870 4.3286 r

u_amber/u_wishbone/o_dcache_uncached_ready(net) 3 1.6322 0.0000 4.3286 r

u_amber/u_wishbone/o_dcache_uncached_ready(a25_wishbone) 0.0000 4.3286 r

u_amber/dcache_wb_uncached_ready (net) 1.6322 0.0000 4.3286 r

u_amber/u_mem/i_wb_uncached_ready(a25_mem) 0.0000 4.3286 r

u_amber/u_mem/i_wb_uncached_ready (net) 1.6322 0.0000 4.3286 r

u_amber/u_mem/U168/A3 (AO21X1_HVT) 0.0367 0.1602 4.4888 r

u_amber/u_mem/U168/Y (AO21X1_HVT) 0.0302 0.0518 4.5406 r

u_amber/u_mem/n310 (net) 1 0.4782 0.0000 4.5406 r

u_amber/u_mem/U87/A2 (NAND2X0_HVT) 0.0302 0.0966 4.6372 r

u_amber/u_mem/U87/Y (NAND2X0_HVT) 0.0747 0.0698 4.7069 f

u_amber/u_mem/o_mem_stall (net) 3 1.7819 0.0000 4.7069 f

u_amber/u_mem/o_mem_stall (a25_mem) 0.0000 4.7069 f

u_amber/mem_stall (net) 1.7819 0.0000 4.7069 f

u_amber/U5/A (NBUFFX2_HVT) 0.0747 0.1688 4.8757 f

u_amber/U5/Y (NBUFFX2_HVT) 0.0263 0.0622 4.9379 f

u_amber/n3 (net) 2 1.2055 0.0000 4.9379 f

u_amber/u_fetch/i_mem_stall (a25_fetch) 0.0000 4.9379 f

u_amber/u_fetch/i_mem_stall (net) 1.2055 0.0000 4.9379 f

u_amber/u_fetch/U22/A1 (OR2X2_HVT) 0.0263 0.1654 5.1033 f

u_amber/u_fetch/U22/Y (OR2X2_HVT) 0.0247 0.0586 5.1619 f

u_amber/u_fetch/core_stall (net) 4 2.1024 0.0000 5.1619 f

u_amber/u_fetch/u_cache/i_core_stall(a25_icache) 0.0000 5.1619 f

u_amber/u_fetch/u_cache/i_core_stall(net) 2.1024 0.0000 5.1619 f

u_amber/u_fetch/u_cache/U135/A(IBUFFX2_HVT) 0.0247 0.1497 5.3116 f

u_amber/u_fetch/u_cache/U135/Y(IBUFFX2_HVT) 0.0356 0.0732 5.3848 r

u_amber/u_fetch/u_cache/n215 (net) 11 6.4218 0.0000 5.3848 r

u_amber/u_fetch/u_cache/U220/A4(AO22X1_HVT) 0.0356 0.3030 5.6877 r

u_amber/u_fetch/u_cache/U220/Y(AO22X1_HVT) 0.0351 0.0815 5.7693 r

u_amber/u_fetch/u_cache/address_c[10](net) 2 1.1040 0.0000 5.7693 r

u_amber/u_fetch/u_cache/address_r_reg_10_/D(DFFX1_HVT) 0.0351 0.1313 5.9006 r

data arrival time 5.9006

clocksysclk (rise edge) 5.0000 5.0000

clock network delay (ideal) 0.0000 5.0000

u_amber/u_fetch/u_cache/address_r_reg_10_/CLK(DFFX1_HVT) 0.0000 5.0000 r

library setup time -0.0709 4.9291

data required time 4.9291

----------------------------------------------------------------------------------------------

data required time 4.9291

data arrival time -5.9006

----------------------------------------------------------------------------------------------

slack (VIOLATED) -0.9715

不知道有什么办法能解决这个slack violation的问题（如果不换工艺库的话(>_<)）
从critical path上看感觉第二条cache那边有点诡异额。。为什么会进进出出的 = =
网上也搜了很多了，但感觉尝试了很多方法都没什么变化，有时候slack甚至还负的恐怖了。。
希望版上各路大虾支支招，感激不尽啊。。T T
为啥我编辑的时候report还是蛮整齐的==。。编辑完就有点乱了。。

angangang3484 · 发表于 2014-3-1 10:48:05

为啥都用HVT的cell？用点normal和LVT的cell试试。

ole · 发表于 2014-3-1 12:01:52

回复 2# angangang3484

3Q
用rvt试过，也是负的，大概-0.34。。lvt slack是正的，但是因为对power有规定。。lvt的leakage power直接数量级就上去了。。。如果这些关键路径用lvt的话power会有多少影响呢。。还有DC里面要怎么弄才可以针对性地设定lvt或者hvt？
那有没有其他办法了？(>_<)

jinwei91 · 发表于 2014-3-1 14:09:38

多库综合试试，critical path上换成svt或者lvt。

ole · 发表于 2014-3-1 14:29:01

回复 4# jinwei91

求问怎样可以只把critical path上的库换掉

sjtusonic · 发表于 2014-3-1 19:51:21

回复 5# ole

修setup时先不管功耗优化的事情，到修hold时，使用HVT。

wlf204 · 发表于 2014-3-1 22:59:47

1.多库综合试试，critical path上换成svt或者lvt。
2. try to flatten this group
3.please check this path at ICC side .Maybe ICC can solve it.

ole · 发表于 2014-3-3 05:37:54

回复 7# wlf204

3Q啊~~那在critical path上换库，有什么指令么？还是得自己写脚本换一下呢。试过多库综合，最后出来的结果就是基本都用了快的库。。怎么控制DC去选择什么库呢？然后用flatten有的时候情况更糟，不知道为什么额

liaowen · 发表于 2014-11-15 16:52:22

看不懂啊……

[求助] 求助~~ DC后slack是负的怎么解决呢

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