memory的输入没有约束

zqlv · 发表于 2015-4-17 23:26:48

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在report一个路径的timing时，发现memory的输入（DB[2]）没有约束，这是怎么回事？
Path 1:Endpoint: hdmi_rx_top/hdmi_rx2/u_hdmi_backend/u_deepColor/u_dataxfer_1x_deRep_
fifo/u_deepcolor_fifo_block/u_deepcolor_fifo/DB[2] (v) (unconstrained output)
Beginpoint: hdmi_rx_top/hdmi_rx2/u_hdmi_backend/u_deepColor/u_deepColorSM/phase_
reg_0_/Q                                        (v) triggered by  leading
edge of 'frxa_clk1x'
Arrival Time                   9.887
Analysis View: func_ss_wcv_125_cworst
   +---------------------------------------------------------------------------------------------------------------------------------------------------------+
   |                   Timing Point                   |    Arc    |    Cell    | Fanout |  Load |  Slew |  Edge |  User  |  Incr | Delay | Arrival |
   |                                                 |             |                |       |    |    |    | Derate | Delay |    |  Time |
   |----------------------------------------------------+--------------+-----------------+--------+-------+-------+-------+--------+-------+-------+---------|
   | hdmi_rx_top/hdmi_rx2/u_hdmi_backend/u_deepColor/u_ | CK ^       |                |    37 | 0.201 | 0.239 | ^ |       |    |    | 3.248 |
   | deepColorSM/phase_reg_0_/CK ->                   |             |                |       |    |    |    |       |    |    |       |
   | hdmi_rx_top/hdmi_rx2/u_hdmi_backend/u_deepColor/u_ | CK ^ -> Q v  | DFFRX4       |    7 | 0.056 | 0.154 | v | 1.000  | 0.000 | 0.599 | 3.847 |
   | deepColorSM/phase_reg_0_/Q                      |             |                |       |    |    |    |       |    |    |       |
   | hdmi_rx_top/hdmi_rx2/u_hdmi_backend/u_deepColor/FE | A v -> Y v | CLKBUFX2       |    4 | 0.048 | 0.248 | v | 1.000  | 0.006 | 0.317 | 4.164 |
   | _OCPC37221_n_59/Y                               |             |                |       |    |    |    |       |    |    |       |
   | hdmi_rx_top/hdmi_rx2/u_hdmi_backend/u_deepColor/u_ | B v -> Y v | AND2XL       |    3 | 0.034 | 0.479 | v | 1.000  | 0.000 | 0.506 | 4.670 |
   | deepColorDecode/p0826A/Y                         |             |                |       |    |    |    |       |    |    |       |
   | hdmi_rx_top/hdmi_rx2/u_hdmi_backend/u_deepColor/u_ | A v -> Y v | AND4X2       |    23 | 0.096 | 0.409 | v | 1.000  | 0.035 | 0.565 | 5.234 |
   | deepColorDecode/g6328/Y                         |             |                |       |    |    |    |       |    |    |       |
   | hdmi_rx_top/hdmi_rx2/u_hdmi_backend/u_deepColor/u_ | A v -> Y ^ | CLKINVX2       |    15 | 0.125 | 0.709 | ^ | 1.000  | 0.000 | 0.530 | 5.765 |
   | deepColorDecode/Fp1072D6200/Y                   |             |                |       |    |    |    |       |    |    |       |
   | hdmi_rx_top/hdmi_rx2/u_hdmi_backend/u_deepColor/u_ | A0N ^ -> Y ^ | AOI2BB2X2    |    1 | 0.077 | 0.884 | ^ | 1.000  | 0.000 | 0.680 | 6.445 |
   | deepColorDecode/g6304/Y                         |             |                |       |    |    |    |       |    |    |       |
   | hdmi_rx_top/hdmi_rx2/u_hdmi_backend/u_deepColor/u_ | B0 ^ -> Y v  | OAI2BB1XL    |    1 | 0.003 | 0.204 | v | 1.000  | 0.130 | 0.283 | 6.728 |
   | deepColorDecode/p1231D6088/Y                      |             |                |       |    |    |    |       |    |    |       |
   | hdmi_rx_top/hdmi_rx2/u_hdmi_backend/u_deepColor/u_ | B v -> Y ^ | NOR3XL       |    1 | 0.012 | 0.624 | ^ | 1.000  | 0.000 | 0.445 | 7.172 |
   | deepColorDecode/p1238D/Y                         |             |                |       |    |    |    |       |    |    |       |
   | hdmi_rx_top/hdmi_rx2/u_hdmi_backend/u_deepColor/u_ | B ^ -> Y v | NAND2X1       |    1 | 0.048 | 0.535 | v | 1.000  | 0.058 | 0.517 | 7.689 |
   | deepColorDecode/p0917D6061/Y                      |             |                |       |    |    |    |       |    |    |       |
   | hdmi_rx_top/hdmi_rx2/u_hdmi_backend/u_deepColor/u_ | A0 v -> Y v  | AO22X2       |    1 | 0.143 | 0.621 | v | 1.000  | 0.110 | 0.868 | 8.557 |
   | dataxfer_1x_deRep_fifo/g1769/Y                   |             |                |       |    |    |    |       |    |    |       |
   | hdmi_rx_top/hdmi_rx2/u_hdmi_backend/u_deepColor/u_ | A0N v -> Y v | OAI2BB1X2    |    1 | 0.115 | 0.618 | v | 1.000  | 0.024 | 0.677 | 9.234 |
   | dataxfer_1x_deRep_fifo/u_deepcolor_fifo_block/p080 |             |                |       |    |    |    |       |    |    |       |
   | 9D770/Y                                           |             |                |       |    |    |    |       |    |    |       |
   | hdmi_rx_top/hdmi_rx2/u_hdmi_backend/u_deepColor/u_ | A v -> Y v | CLKBUFX2       |    1 | 0.084 | 0.403 | v | 1.000  | 0.100 | 0.640 | 9.874 |
   | dataxfer_1x_deRep_fifo/u_deepcolor_fifo_block/FE_O |             |                |       |    |    |    |       |    |    |       |
   | FC37199_wire_9_2_/Y                               |             |                |       |    |    |    |       |    |    |       |
   | hdmi_rx_top/hdmi_rx2/u_hdmi_backend/u_deepColor/u_ | DB[2] v    | deepc_FIFO_regf |       | 0.084 | 0.403 | v | 1.000  | 0.009 | 0.013 | 9.887 |
   | dataxfer_1x_deRep_fifo/u_deepcolor_fifo_block/u_de |             |                |       |    |    |    |       |    |    |       |
   | epcolor_fifo/DB[2] ->                            |             |                |       |    |    |    |       |    |    |       |
   +---------------------------------------------------------------------------------------------------------------------------------------------------------+

zqlv · 发表于 2015-4-17 23:30:05

这个memory的lib文件已经读进去了，没有发现warning或erro的问题。需要单独对memory设置约束选项吗？我使用的是edi

zqlv · 发表于 2015-4-18 00:17:26

综合时，也没发现问题

icfbicfb · 发表于 2015-4-18 08:20:23

sdc写的有问题， check_timing 看看，没约束上，不会优化的

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[求助] memory的输入没有约束

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