Gowin target (#542)

* load wires

* add slice bels

* add IOB

* add aliases

* local aliases

* broken packing stuff

* working packer

* add constraints

* pnr runs1111

* add timing info

* constraints

* more constraint stuff

* add copyright

* remove generic reference

* remove parameters

* remove generic python api

* add newline to end of file

* some small refactoring

* warn on invalid constraints

* don't error on missing cell

* comment out debugging print

* typo

* avoid copy

* faster empty idstring

* remove intermediate variable

* no more deadnames

* fix cst warnings

* increase ripup and epsilon a bit

* take single device parameter

* add info to readme

* gui stubs

* Revert 4d03b681a8634e978bd5af73c97665500047e055

* assign ff_used in assignArchInfo

* decrease beta for better routability

* try to fix CI

1 files changed, 429 insertions, 0 deletions

diff --git a/gowin/constids.inc b/gowin/constids.inc
new file mode 100644
index 00000000..bf26e9ca
--- /dev/null
+++ b/gowin/constids.inc
@@ -0,0 +1,429 @@
+X(A0)
+X(B0)
+X(C0)
+X(D0)
+X(A1)
+X(B1)
+X(C1)
+X(D1)
+X(A2)
+X(B2)
+X(C2)
+X(D2)
+X(A3)
+X(B3)
+X(C3)
+X(D3)
+X(A4)
+X(B4)
+X(C4)
+X(D4)
+X(A5)
+X(B5)
+X(C5)
+X(D5)
+X(A6)
+X(B6)
+X(C6)
+X(D6)
+X(A7)
+X(B7)
+X(C7)
+X(D7)
+X(F0)
+X(F1)
+X(F2)
+X(F3)
+X(F4)
+X(F5)
+X(F6)
+X(F7)
+X(Q0)
+X(Q1)
+X(Q2)
+X(Q3)
+X(Q4)
+X(Q5)
+X(Q6)
+X(Q7)
+X(OF0)
+X(OF1)
+X(OF2)
+X(OF3)
+X(OF4)
+X(OF5)
+X(OF6)
+X(OF7)
+X(X01)
+X(X02)
+X(X03)
+X(X04)
+X(X05)
+X(X06)
+X(X07)
+X(X08)
+X(N100)
+X(SN10)
+X(SN20)
+X(N130)
+X(S100)
+X(S130)
+X(E100)
+X(EW10)
+X(EW20)
+X(E130)
+X(W100)
+X(W130)
+X(N200)
+X(N210)
+X(N220)
+X(N230)
+X(N240)
+X(N250)
+X(N260)
+X(N270)
+X(S200)
+X(S210)
+X(S220)
+X(S230)
+X(S240)
+X(S250)
+X(S260)
+X(S270)
+X(E200)
+X(E210)
+X(E220)
+X(E230)
+X(E240)
+X(E250)
+X(E260)
+X(E270)
+X(W200)
+X(W210)
+X(W220)
+X(W230)
+X(W240)
+X(W250)
+X(W260)
+X(W270)
+X(N800)
+X(N810)
+X(N820)
+X(N830)
+X(S800)
+X(S810)
+X(S820)
+X(S830)
+X(E800)
+X(E810)
+X(E820)
+X(E830)
+X(W800)
+X(W810)
+X(W820)
+X(W830)
+X(CLK0)
+X(CLK1)
+X(CLK2)
+X(LSR0)
+X(LSR1)
+X(LSR2)
+X(CE0)
+X(CE1)
+X(CE2)
+X(SEL0)
+X(SEL1)
+X(SEL2)
+X(SEL3)
+X(SEL4)
+X(SEL5)
+X(SEL6)
+X(SEL7)
+X(N101)
+X(N131)
+X(S101)
+X(S131)
+X(E101)
+X(E131)
+X(W101)
+X(W131)
+X(N201)
+X(N211)
+X(N221)
+X(N231)
+X(N241)
+X(N251)
+X(N261)
+X(N271)
+X(S201)
+X(S211)
+X(S221)
+X(S231)
+X(S241)
+X(S251)
+X(S261)
+X(S271)
+X(E201)
+X(E211)
+X(E221)
+X(E231)
+X(E241)
+X(E251)
+X(E261)
+X(E271)
+X(W201)
+X(W211)
+X(W221)
+X(W231)
+X(W241)
+X(W251)
+X(W261)
+X(W271)
+X(N202)
+X(N212)
+X(N222)
+X(N232)
+X(N242)
+X(N252)
+X(N262)
+X(N272)
+X(S202)
+X(S212)
+X(S222)
+X(S232)
+X(S242)
+X(S252)
+X(S262)
+X(S272)
+X(E202)
+X(E212)
+X(E222)
+X(E232)
+X(E242)
+X(E252)
+X(E262)
+X(E272)
+X(W202)
+X(W212)
+X(W222)
+X(W232)
+X(W242)
+X(W252)
+X(W262)
+X(W272)
+X(N804)
+X(N814)
+X(N824)
+X(N834)
+X(S804)
+X(S814)
+X(S824)
+X(S834)
+X(E804)
+X(E814)
+X(E824)
+X(E834)
+X(W804)
+X(W814)
+X(W824)
+X(W834)
+X(N808)
+X(N818)
+X(N828)
+X(N838)
+X(S808)
+X(S818)
+X(S828)
+X(S838)
+X(E808)
+X(E818)
+X(E828)
+X(E838)
+X(W808)
+X(W818)
+X(W828)
+X(W838)
+X(E110)
+X(W110)
+X(E120)
+X(W120)
+X(S110)
+X(N110)
+X(S120)
+X(N120)
+X(E111)
+X(W111)
+X(E121)
+X(W121)
+X(S111)
+X(N111)
+X(S121)
+X(N121)
+X(LB01)
+X(LB11)
+X(LB21)
+X(LB31)
+X(LB41)
+X(LB51)
+X(LB61)
+X(LB71)
+X(GB00)
+X(GB10)
+X(GB20)
+X(GB30)
+X(GB40)
+X(GB50)
+X(GB60)
+X(GB70)
+X(VCC)
+X(VSS)
+X(LT00)
+X(LT10)
+X(LT20)
+X(LT30)
+X(LT02)
+X(LT13)
+X(LT01)
+X(LT04)
+X(LBO0)
+X(LBO1)
+X(SS00)
+X(SS40)
+X(GT00)
+X(GT10)
+X(GBO0)
+X(GBO1)
+X(DI0)
+X(DI1)
+X(DI2)
+X(DI3)
+X(DI4)
+X(DI5)
+X(DI6)
+X(DI7)
+X(CIN0)
+X(CIN1)
+X(CIN2)
+X(CIN3)
+X(CIN4)
+X(CIN5)
+X(COUT0)
+X(COUT1)
+X(COUT2)
+X(COUT3)
+X(COUT4)
+X(COUT5)
+// slice items
+X(SLICE)
+X(CLK)
+X(LSR)
+X(CE)
+X(Q)
+X(F)
+X(A)
+X(B)
+X(C)
+X(D)
+// iob items
+X(IOB)
+X(I)
+X(O)
+X(IO)
+X(OE)
+// bels
+X(DFF0)
+X(DFF1)
+X(DFF2)
+X(DFF3)
+X(DFF4)
+X(DFF5)
+
+X(LUT0)
+X(LUT1)
+X(LUT2)
+X(LUT3)
+X(LUT4)
+X(LUT5)
+X(LUT6)
+X(LUT7)
+
+X(IOBA)
+X(IOBB)
+X(IOBC)
+X(IOBD)
+X(IOBE)
+X(IOBF)
+X(IOBG)
+X(IOBH)
+X(IOBI)
+X(IOBJ)
+
+// DFF types
+X(DFF)
+X(DFFE)
+X(DFFS)
+X(DFFSE)
+X(DFFR)
+X(DFFRE)
+X(DFFP)
+X(DFFPE)
+X(DFFC)
+X(DFFCE)
+X(DFFN)
+X(DFFNE)
+X(DFFNS)
+X(DFFNSE)
+X(DFFNR)
+X(DFFNRE)
+X(DFFNP)
+X(DFFNPE)
+X(DFFNC)
+X(DFFNCE)
+
+// IOB types
+X(IBUF)
+X(OBUF)
+X(IOBUF)
+X(TBUF)
+
+// primitive attributes
+X(INIT)
+X(FF_USED)
+X(FF_TYPE)
+X(INPUT_USED)
+X(OUTPUT_USED)
+X(ENABLE_USED)
+X(BEL)
+
+// ports
+X(EN)
+X(E)
+X(Y)
+X(PAD)
+X(RESET)
+X(SET)
+X(PRESET)
+X(CLEAR)
+X(I0)
+X(I1)
+X(I2)
+X(I3)
+X(OEN)
+
+// timing
+X(X0)
+X(FX1)
+X(X2)
+X(X8)
+X(PIO_CENT_PCLK)
+X(CENT_SPINE_PCLK)
+X(SPINE_TAP_PCLK)
+X(TAP_BRANCH_PCLK)
+X(BRANCH_PCLK)
+X(clksetpos)
+X(clkholdpos)
+X(clk_qpos)
+X(a_f)
+X(b_f)
+X(c_f)
+X(d_f)