Xilinx Synthesis Technology User Guide

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XST User Guide Table 5-5 Third Party Constraints Name Vendor XST Equivalent syn_maxfan Synplicity max_fanout VHDL/ Verilog syn_netlist_hierarchy Synplicity keep_hierarchy VHDL/ Verilog syn_noarrayports Synplicity NA NA syn_noclockbuf Synplicity clock_buffer VHDL/ Verilog syn_noprune Synplicity NA NA syn_pipeline Synplicity Register Balancing VHDL/ Verilog syn_probe Synplicity NA NA syn_ramstyle Synplicity NA NA syn_reference_clock Synplicity NA NA syn_romstyle Synplicity NA NA syn_sharing Synplicity resource_sharing VHDL/ Verilog syn_state_machine Synplicity fsm_extract VHDL/ Verilog syn_tco Synplicity NA NA syn_tpd Synplicity NA NA syn_tristate Synplicity NA NA syn_tristatetomux Synplicity NA NA syn_tsu Synplicity NA NA syn_useenables Synplicity NA NA syn_useioff Synplicity iob VHDL/ Verilog translate_off/translate_on Synplicity/ Synopsys translate_off/ translate_on xc_alias Synplicity NA NA Available For VHDL/ Verilog 5-52 Xilinx Development System
Table 5-5 Third Party Constraints Name Vendor XST Equivalent Design Constraints Available For xc_clockbuftype Synplicity clock_buffer VHDL/ Verilog xc_fast Synplicity fast VHDL/ Verilog xc_fast_auto Synplicity fast VHDL/ Verilog xc_global_buffers Synplicity bufg VHDL/ Verilog xc_ioff Synplicity iob VHDL/ Verilog xc_isgsr Synplicity NA NA xc_loc Synplicity loc VHDL/ Verilog xc_map Synplicity lut_map VHDL/ Verilog xc_ncf_auto_relax Synplicity NA NA xc_nodelay Synplicity nodelay VHDL/ Verilog xc_padtype Synplicity iostandard VHDL/ Verilog xc_props Synplicity NA NA xc_pullup Synplicity pullup VHDL/ Verilog xc_rloc Synplicity rloc VHDL/ Verilog xc_fast Synplicity fast VHDL/ Verilog xc_slow Synplicity NONE NA * You must use the Keep constraint instead of SIGNAL_PRESERVE. XST User Guide 5-53
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Xilinx Synthesis Technology (XST) U
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About This Manual Manual Contents T
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Resource Description/URL About This
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Conventions Typographical This manu
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Contents About This Manual Conventi
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Contents 8-bit Shift-Left Register
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Contents Dividers .................
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Contents Verilog Flow: ............
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Contents Sequential Process with a
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Introduction Architecture Support X
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Introduction 4. Set the desired Syn
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Figure 1-1 View Synthesis Report In
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HDL Coding Techniques This chapter
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HDL Coding Techniques The following
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Table 2-1 VHDL and Verilog Examples
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Signed/Unsigned Support Registers H
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Flip-flop with Positive-Edge Clock
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VHDL Code HDL Coding Techniques Fol
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IO Pins Description CE Clock Enable
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Log File HDL Coding Techniques The
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HDL Coding Techniques Verilog Code
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HDL Coding Techniques 4-bit Latch w
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Tristates Log File HDL Coding Techn
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Counters HDL Coding Techniques XST
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HDL Coding Techniques 4-bit Unsigne
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HDL Coding Techniques entity counte
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Verilog Code HDL Coding Techniques
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HDL Coding Techniques 4-bit Unsigne
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Accumulators HDL Coding Techniques
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HDL Coding Techniques • shift mod
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HDL Coding Techniques 8-bit Shift-L
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Dynamic Shift Register module shift
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library IEEE; use IEEE.std_logic_11
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neither Full nor Parallel module no
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Related Constraints Related constra
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HDL Coding Techniques entity mux is
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Decoders Log File HDL Coding Techni
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VHDL (One-Cold) Following is the VH
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VHDL Following is the VHDL code. li
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Priority Encoders Log File HDL Codi
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Verilog Logical Shifters HDL Coding
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Example 1 HDL Coding Techniques The
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Verilog Arithmetic Operations Follo
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Unsigned 8-bit Adder HDL Coding Tec
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HDL Coding Techniques Verilog Follo
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Simple Signed 8-bit Adder HDL Codin
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Unsigned 8-bit Adder/Subtractor HDL
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Comparators (=, /=,=) HDL Coding Te
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HDL Coding Techniques this, XST can
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Dividers HDL Coding Techniques VHDL
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B C A OPER +/- RES OPER X8984 HDL C
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HDL Coding Techniques • RAM descr
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HDL Coding Techniques entity raminf
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HDL Coding Techniques VHDL The foll
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HDL Coding Techniques Verilog The f
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HDL Coding Techniques VHDL The foll
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VHDL Following is the VHDL code for
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HDL Coding Techniques Single-Port R
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Verilog HDL Coding Techniques Follo
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HDL Coding Techniques Single-Port R
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Verilog Following is the Verilog co
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VHDL HDL Coding Techniques Followin
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Dual-Port RAM with Asynchronous Rea
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HDL Coding Techniques Dual-Port RAM
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HDL Coding Techniques architecture
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HDL Coding Techniques Dual-Port RAM
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VHDL Following is the VHDL code for
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Inputs Next State Function RESET CL
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FSM with 1 Process HDL Coding Techn
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Inputs FSM with 2 Processes HDL Cod
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process2 : process (state, x1) begi
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State Registers HDL Coding Techniqu
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Compact HDL Coding Techniques Compa
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Black Box Support Log File HDL Codi
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FPGA Optimization Introduction This
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Macro Generation • Number of Cloc
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Multiplexers FPGA Optimization For
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RAMs FPGA Optimization Two types of
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Flip-Flop Retiming FPGA Optimizatio
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FPGA Optimization INCREMENTAL_SYNTH
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FPGA Optimization Note In the curre
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FPGA Optimization generated NGC fil
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FPGA Optimization The problem most
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Log File Analysis FPGA Optimization
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FPGA Optimization • Tristates Thi
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FPGA Optimization NOTE: THESE TIMIN
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FPGA Optimization The start point a
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FPGA Optimization If the box_type a
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Instantiation of MUXF5 FPGA Optimiz
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Specifying INITs and RLOCs in HDL C
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FPGA Optimization for registers onl
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PCI Flow FPGA Optimization To succe
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CPLD Optimization This chapter cont
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Implementation Details for Macro Ge
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CPLD Optimization • Final results
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CPLD Optimization The CPLD fitter m
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Page 263 and 264: Synthesis Options Design Constraint
Page 265 and 266: Design Constraints Figure 5-4 Synth
Page 267 and 268: • Mux Extraction • Mux Style
Page 269 and 270: Design Constraints For FPGA device
Page 271 and 272: XST Constraint File (XCF) Design Co
Page 273 and 274: Design Constraints Timing Constrain
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Page 279 and 280: HDL Constraints Design Constraints
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Page 283 and 284: Design Constraints • Number of Cl
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Page 287 and 288: Timing Constraints Design Constrain
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Page 293 and 294: Design Constraints • TIMEGRP TIME
Page 295 and 296: Design Constraints See the “INPAD
Page 297 and 298: Constraint Name clock_buffer bufgdl
Page 299 and 300: Constraint Name move_last- _stage m
Page 301 and 302: Constraint Name xor_collapse yes, n
Page 303 and 304: Constraint Name synthesis/ synopsis
Page 305 and 306: Design Constraints The following ta
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Page 315 and 316: Constraints Precedence Design Const
Page 317 and 318: VHDL Language Support Chapter 6 Thi
Page 319 and 320: VHDL Language Support 'W' means wea
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Page 323 and 324: Record Types Objects in VHDL MATRIX
Page 325 and 326: Entity Declaration VHDL Language Su
Page 327 and 328: VHDL Language Support Example 6-2 g
Page 329 and 330: VHDL Language Support Example 6-3 4
Page 331 and 332: egin Y 13), port map (X,Y,C1); C2
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Page 337 and 338: Example 6-10 Combinatorial Process
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Page 341 and 342: For...Loop Statement VHDL Language
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Page 347 and 348: Multiple Wait Statements Descriptio
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Page 353 and 354: STANDARD Package VHDL Language Supp
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Page 357 and 358: Packages Enumeration Types Integer
Page 359 and 360: Table 6-4 Objects VHDL Language Sup
Page 361 and 362: Wait Statement Loop Statement Table
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VHDL Reserved Words The following t
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Verilog Language Support Chapter 7
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Behavioral Verilog Features Verilog
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Verilog Language Support Example 7-
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Table 7-1 Expressions Bitwise Negat
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Modules Verilog Language Support In
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Procedural Assignments Verilog Lang
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Verilog Language Support Casez trea
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While Loops Verilog Language Suppor
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Verilog Language Support Example 7-
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Verilog Language Support The main l
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Verilog Language Support • You ca
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Example 7-9 Function Declaration an
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Blocking Versus Non-Blocking Proced
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Include Files Verilog Language Supp
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Verilog Language Support Each insta
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Parameters Verilog Language Support
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Verilog Language Support • Design
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Verilog Meta Comments Verilog Langu
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Table 7-4 Data Types Registers Vect
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Table 7-8 Design Hierarchy Module d
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Verilog Reserved Keywords Verilog L
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Command Line Mode Introduction Chap
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Command Line Mode • Script File
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Command Line Mode • Second column
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Table 8-4 HDL Options (VHDL and Ver
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Command Line Mode Table 8-6 Target
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Command Line Mode • To get a list
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Elaborate Command Time Command Comm
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♦ smallcntr.vhd Command Line Mode
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Command Line Mode You can improve t
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Command Line Mode Sometimes, XST is
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XST Shell Command Line Mode To use
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Case 2 Command Line Mode Each desig
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Log File Analysis Introduction This
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Quiet Mode Timing Report Log File A
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RAM Style : Auto ROM Extraction : y
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Synthesizing Unit . Related source
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# Counters : 2 # 4-bit up counter :
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Log File Analysis Data Path: sixty_
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CPLD Log File Log File Analysis The
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Analyzing Entity (Architecture ).
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Log File Analysis =================
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XST Naming Conventions This appendi
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