* Circuit_macros Version 10.8, copyright (c) 2025 J. D. Aplevich under *
* the LaTeX Project Public Licence in file Licence.txt. The files of *
* this distribution may be redistributed or modified provided that this *
* copyright notice is included and provided that modifications are clearly *
* marked to distinguish them from this distribution. There is no warranty *
* whatsoever for these files. *
`Notes: ==================================================================
Gates other than BUFFER and NOT have an optional integer argument N
that sets the number of input locations, which then have labels In1
to InN.
BUFFER and NOT gates have In1 only. If there is a first argument, it
is a line specification and the gate is drawn along the line as for a
two-terminal element.
NEGATED inputs are obtained if the second argument is N (uppercase n).
DEBUGGING: The statement
print "`$0'($@)" ;
inserted into a macro will display the macro name and current arguments
========================================================================='
`Nonzero parameter for logic size and grid mesh'
define(`L_unit',`(linewid/10)')
`Dimensions in L_units, also for external use:'
define(`G_hht',3) `gate half-height'
define(`AND_ht',`(2*G_hht)') `gate heights and widths ...'
define(`AND_wd',7)
define(`BUF_ht',4)
define(`BUF_wd',3.5)
define(`OR_rad',7) `OR input radius'
define(`XOR_off',1) `XOR and NXOR parameter'
define(`N_diam',(3/2)) `not-circle diameter'
define(`N_rad',`(N_diam/2)') `not-circle radius'
define(`NOT_rad',`(N_rad*L_unit)') `scaled radius eg line chop NOT_rad'
define(`N_attr') `not-circle attribs eg shaded "green"'
define(`H_ht',2) `Hysteresis symbol dimen'
define(`Mx_pins',6) `max number of gate input pins without extensions
Possibly 4 is better for negated inputs'
define(`FF_wid',12) `Bistable (flipflop)'
define(`FF_ht',18)
define(`Mux_wid',8) `Multiplexer defaults'
define(`Mux_ht',18)
define(`Lg_body') `Gate body attributes, e.g., shaded "color"'
define(`lg_plen',4) `Logic pin'
define(`lg_pinsep',`(3*L_unit)') `logic pin separation in logic units'
define(`lg_chipwd',`(18*L_unit)') `default chip width'
define(`lg_pintxt',
`"ifxfig(`$1',`ifsvg(`svg_small(`$1',75)',`sp_{\scriptsize `$1'}sp_')')"')
`Logic pin text with bar where possible'
define(`lg_bartxt',`iflatex(`$\overline{\hbox{`$1'}}$',
`ifsvg(`svg_ol(`$1')',`$1')')')
`The comma has to be at the top level'
define(`m4_pattocomma',`patsubst(`$1',`$2',`,')')
`Scale grid coordinates to world coordinates'
define(`grid_',`(vscal_(L_unit,`$1',`$2'))')
`Scale and rotate grid coords to world coords'
define(`svec_',`vec_(vscal_(L_unit,`$1',`$2'))')
`Relative svec_'
define(`rsvec_',`Here+svec_(`$1',`$2')')
`NOT_circle
convenience for drawing NOT circles'
define(`NOT_circle',`circle diam N_diam*L_unit N_attr')
`LH_symbol([U|D|L|R|degrees][I],keys)
I=inverted
logical hysteresis symbol
keys: hght=expr; (H_ht)
wdth=fraction; (body wdth=frac*hght) '
define(`LH_symbol',`[ define(`m4LH',patsubst(`$1',I))dnl
pushkeys_(`$2',`hght:H_ht; wdth:0.6;')dnl
define(`m4Hs',ifinstr(`$1',I,-)H_ht)setdir_(m4LH,R)dnl
line to svec_(H_ht,0) \
then to svec_(1.1*H_ht,m4Hs)
line from rsvec_((1-m4wdth)*H_ht,0) \
to rsvec_(-m4wdth*H_ht,0) \
then to rsvec_(-(m4wdth+0.1)*H_ht,-(m4Hs))
`$2'; resetdir_ popdef(`m4hght',`m4wdth') ]')
`LT_symbol(U|D|L|R|degrees,keys)
triangle_symbol
keys: wdth=expr; (H_ht) '
define(`LT_symbol', `[ setdir_(`$1',R) pushkeys_(`$2',`wdth:H_ht')
line to svec_(0,m4wdth*5/8) then to svec_(m4wdth,0) \
then to svec_(0,-m4wdth*5/8) then to Here
`$2'; resetdir_ popdef(`m4wdth') ] ')
`BOX_gate(inputs,output,swid,sht,label,
attributes)
drawn in the current direction
args 3 and 4 are L_unit values
inputs=[P|N]* output=P|N'
define(`BOX_gate',`dnl
define(`m4m',`ifelse(`$1',,2,len(`$1'))')define(`m4a',`$1')dnl
define(`m4h',`ifelse(`$3',,AND_wd,`$3')')dnl
define(`m4v',`ifelse(`$4',,AND_wd,`$4')')dnl
[ Box: [Outline: line to svec_(0,m4v/2) then to svec_(m4h,m4v/2) \
then to svec_(m4h,-m4v/2) then to svec_(0,-m4v/2) then to (0,0) \
Lg_body `$6'] \
with .Outline.start at (0,0)
ifelse(`$5',,,`{ move to Box.n+(0,-5pt__)
m4lstring($5,"ifsvg(`svg_small($5,75)',`{\scriptsize$ $5 $}')") }')
IOdefs(from svec_(0,m4v/2) to svec_(0,-m4v/2),In,`$1',R)
Out: svec_(m4h,0) ifelse(`$2',N,`+svec_(N_diam,0)
N_Out: NOT_circle \
at Out-svec_(N_rad,0)'); `$7']')
`AND_gate(n,[N][B],[wid,[ht]],attributes)
drawn in the current direction
0 <= n <= 16; N=negated inputs, B=box shape
or
AND_gate(chars,[B],wid,ht,attributes)
arg1 is one or more of N|P '
define(`AND_gate',`define(`m4arg1',ifelse(`$1',,2,`$1'))dnl
ifelse(ifinstr(m4arg1,N,1)`'ifinstr(m4arg1,P,1),,
`m4dupstr(ifinstr(`$2',N,N,P),m4arg1,`m4PN')',`define(`m4PN',m4arg1)')dnl
ifinstr(`$2',B,
`BOX_gate(m4PN,ifinstr(`$2',N,N,P),ifelse(`$3',,,`($3)/(L_unit)'),
ifelse(`$4',,,`($4)/(L_unit)'),ifsvg(`&```amp''';',`\&'),Lg_body `$5',`$6')',
`AND_gen(m4PN,ifelse(`$2',N,N)IBAONESEC,`$3',`$4',Lg_body `$5',`$6')')')
`NAND_gate(n,[N][B],[wid,[ht]],attributes)
0 <= n <= 16; N=negated inputs, B=box shape
or
NAND_gate(chars,[B],wid,ht)
arg1 is one or more of N|P '
define(`NAND_gate',`define(`m4arg1',ifelse(`$1',,2,`$1'))dnl
ifelse(ifinstr(m4arg1,N,1)`'ifinstr(m4arg1,P,1),,
`m4dupstr(ifinstr(`$2',N,N,P),m4arg1,`m4PN')',`define(`m4PN',m4arg1)')dnl
ifinstr(`$2',B,
`BOX_gate(m4PN,ifelse(`$2',N,N,P),ifelse(`$3',,,`($3)/(L_unit)'),
ifelse(`$4',,,`($4)/(L_unit)'),ifsvg(`&```amp''';',`\&'),Lg_body `$5',`$6')',
`AND_gen(m4PN,ifelse(`$2',N,N)IBANONESEC,`$3',`$4',Lg_body `$5',`$6')')')
`AND_gen(n,chars,[wid,[ht]],attributes)
0 <= n <= 16
B=base and straight sides; A=Arc;
[N]NE,[N]SE,[N]I,[N]N,[N]S=inputs or circles,
[N]O=output; C=center location
or
AND_gen(chars,chars,[wid,[ht]],attributes)
arg1 is one or more of N|P
eg PPPP defines 4 inputs,
NPNP negates the first and third;
arg2 as above except [N]I is ignored
arg5 contains body attributes '
define(`AND_gen',`define(`m4arg1',ifelse(`$1',,2,`$1'))dnl
ifelse(ifinstr(m4arg1,N,1)`'ifinstr(m4arg1,P,1),,
`m4dupstr(ifinstr(`$2',N,N,P),m4arg1,`m4PN')',`define(`m4PN',m4arg1)')dnl
define(`m4hor',`ifelse(`$3',,AND_wd,`($3)/(L_unit)')')dnl
define(`m4ver',`ifelse(`$4',,ifelse(`$3',,AND_ht,AND_ht/(AND_wd)*m4hor),
`($4)/(L_unit)')')define(`dna_',ifelse(`$2',,IBAONESEC,`$2'))dnl
[ sc_draw(`dna_',B,`Bm: line from svec_(m4hor-m4ver/2,-m4ver/2) \
to svec_(0,-m4ver/2) \
then to svec_(0,m4ver/2) then \
to svec_(m4hor-m4ver/2,m4ver/2) Lg_body `$5'
')dnl
sc_draw(`dna_',A,`Arc: arc cw rad m4ver/2 \
to rsvec_(0,-m4ver) \
with .c at rsvec_(0,-m4ver/2) Lg_body `$5'
')dnl
sc_draw(`dna_',NNE,
`NNE: svec_(m4hor-m4ver/2,0)+svec_(Rect_(m4ver/2+N_diam,45))
N_NNE: NOT_circle \
at svec_(m4hor-m4ver/2,0)+svec_(Rect_(m4ver/2+N_rad,45))
')dnl
sc_draw(`dna_',NSE,
`NSE: svec_(m4hor-m4ver/2,0)+svec_(Rect_(m4ver/2+N_diam,-45))
N_NSE: NOT_circle \
at svec_(m4hor-m4ver/2,0)+svec_(Rect_(m4ver/2+N_rad,-45))
')dnl
sc_draw(`dna_',NE, `NE: svec_(m4hor-m4ver/2,0)+svec_(Rect_(m4ver/2,45))
')dnl
ifelse(ifinstr(`$1',N,1)`'ifinstr(`$1',P,1),,
`sc_draw(`dna_',NI, `m4A_defs(ifelse(`$1',,2,`$1'),N)')
')dnl
sc_draw(`dna_',SE, `SE: svec_(m4hor-m4ver/2,0)+svec_(Rect_(m4ver/2,-45))
')dnl
sc_draw(`dna_',NN, `N_NN: NOT_circle \
at svec_((m4hor-m4ver/2)/2,m4ver/2+N_rad)
NN: svec_((m4hor-m4ver/2)/2,m4ver/2+N_diam)
')dnl
sc_draw(`dna_',NS, `N_NS: NOT_circle \
at svec_((m4hor-m4ver/2)/2,-m4ver/2-N_rad)
NS: svec_((m4hor-m4ver/2)/2,-m4ver/2-N_diam)
')dnl
sc_draw(`dna_',NO, `N_Out: NOT_circle \
at svec_(m4hor+N_rad,0)
Out: svec_(m4hor+N_diam,0)
')dnl
sc_draw(`dna_',O, `Out: svec_(m4hor,0)
')dnl
sc_draw(`dna_',N, `N: svec_(0,m4ver/2)
')dnl
ifelse(ifinstr(`$1',N,1)`'ifinstr(`$1',P,1),,
`sc_draw(`dna_',I, `m4A_defs(ifelse(`$1',,2,`$1'))')',
`m4A_defs(`$1')')
sc_draw(`dna_',S, `S: svec_(0,-m4ver/2)
')dnl
sc_draw(`dna_',C, `C: svec_(m4hor/2,0)')
`$6']')
`Input locations, flat face
m4A_defs(n,[N]) or m4A_defs(string)
string = one or more N|P
otherwise n inputs (negated if arg2 is N)
Input points are defined as Inx
and NOT circles as N_Inx where x is integer'
`What about the IOdefs macro?'
define(`m4A_defs',`define(`m4arg1',ifelse(`$1',,2,`$1'))dnl
ifelse(ifinstr(m4arg1,N,1)`'ifinstr(m4arg1,P,1),,
`m4dupstr(ifinstr(`$2',N,N,P),m4arg1,`m4AI')define(`m4AnI',m4arg1)',
`define(`m4AI',m4arg1)define(`m4AnI',len(m4arg1))')dnl
define(`m4m',`m4ver/2/min(m4AnI,Mx_pins-1)*min(m4AnI,3*(Mx_pins-1))')dnl
ifelse(eval(m4AnI>Mx_pins),1,
`line from svec_(0, m4m) \
to svec_(0,m4ver/2)
line from svec_(0,-m4m) \
to svec_(0,-m4ver/2)')
for_(1,m4AnI,1,`ifelse(substr(m4AI,0,1),N,
`N_In`'m4x: NOT_circle at \
svec_(-N_rad,m4ver/min(m4AnI,Mx_pins-1)*((m4AnI+1)/2-m4x))
In`'m4x: svec_(-N_diam,m4ver/min(m4AnI,Mx_pins-1)*((m4AnI+1)/2-m4x)) ',
`In`'m4x: svec_(0,m4ver/min(m4AnI,Mx_pins-1)*((m4AnI+1)/2-m4x))')dnl
define(`m4AI',substr(m4AI,1)) ') ')
`OR_gate or NOR_gate or XOR_gate or NXOR_gate
drawn in the current direction
args = (n,[N][B],wid,ht,attributes)
0 <= n <= 16; N=negated inputs, B=box shape
or
args = (chars,[B],wid,ht,attributes)
arg1 is one or more of N|P '
define(`OR_gate',`m4_OR(OR,$@)')
define(`NOR_gate',`m4_OR(NOR,$@)')
define(`XOR_gate',`m4_OR(XOR,$@)')
define(`NXOR_gate',`m4_OR(NXOR,$@)')
`OR_gen(n,chars,[wid,[ht]],attributes)
0 <= n <= 16
B=base and straight sides; A=Arc;
[N]NE,[N]SE,[N]I,[N]N,[N]S=inputs or circles,
[N]P=XOR arc; [N]O=output; C=center
or
OR_gen(chars,chars,[wid,[ht]],attributes)
arg1 is one or more of N|P
eg PPPP defines 4 inputs,
NPNP negates the first and third;
arg2 as above except [N]I is ignored
If arg5 contains shaded rgbstring(...)
the arguments of rgbstring may not contain
parentheses'
define(`OR_gen',`[define(`m4arg1',ifelse(`$1',,2,`$1'))dnl
ifelse(ifinstr(m4arg1,N,1)`'ifinstr(m4arg1,P,1),,
`m4dupstr(ifinstr(`$2',N,N,P),m4arg1,`m4PN')',`define(`m4PN',m4arg1)')dnl
define(`m4hor',`ifelse(`$3',,AND_wd,`($3)/(L_unit)')')define(`m4o',0)dnl
define(`m4ver',`ifelse(`$4',,ifelse(`$3',,AND_ht,AND_ht/(AND_wd)*m4hor),
`($4)/(L_unit)')')define(`dna_',ifelse(`$2',,IBAONESEC,`$2'))dnl
define(`m4gfill',`Lg_body `$5'')dnl
dnl concave fill, painful code:
ifelse(regexp(m4gfill,`^fill \|[^a-z]fill '),-1,
`ifelse(regexp(m4gfill,`shaded *"'),-1,
`define(`m4osh',`regexp(m4gfill,`.*shaded *\(sprintf([^)]*)\).*$',\1)')
define(`m4att',`patsubst(m4gfill,`shaded *sprintf([^)]*)')')',
`define(`m4osh',`regexp(m4gfill,`.*shaded *"\([^"]*\)".*$',"\1")')
define(`m4att',`patsubst(m4gfill,`shaded *"[^"]*"')')')',
`define(`m4osh',`regexp(m4gfill,`.*fill *\([^ ]*\) .*$',`graystring(\1)')')
define(`m4att',`patsubst(m4gfill,`fill *[^ ]*[ $]')')')
sc_draw(`dna_',P,`define(`m4o',XOR_off*m4ver/(AND_ht))dnl
Parc: arc cw from svec_(0,m4ver/2) \
to svec_(0,-m4ver/2) \
with .c at svec_(-sqrt((OR_rad*m4ver/(AND_ht))^2-(m4ver/2)^2),0)
')dnl
sc_draw(`dna_',B,dnl
`r = OR_rad*m4ver/(AND_ht)
rt = sqrt(r^2-(m4ver/2)^2)
ifelse(m4osh,,,`for i=0 to int((r-rt)*L_unit/lthick+1) do {
tx = i*lthick/L_unit
{arc cw from svec_(tx+m4o-hlth,m4ver/2) to svec_(tx+m4o-hlth,-m4ver/2) \
with .c at svec_(tx+m4o-rt,0) outlined m4osh} }
{rotbox(m4hor/3*L_unit,m4ver*L_unit,shaded m4osh invis) with .W \
at svec_(m4o+r-rt,0)} ')
Bt: line from svec_(m4o+m4hor/3,m4ver/2) \
to svec_(m4o,m4ver/2) ifdpic(chop 0 chop -hlth) m4att
ArcB: arc cw to svec_(m4o,-m4ver/2) with .c at svec_(m4o-rt,0) m4att
Bb: line to svec_(m4o+m4hor/3,-m4ver/2) ifdpic(chop -hlth chop 0) m4att
')dnl
sc_draw(`dna_',A,`define(`m4m',`((m4hor*2/3)^2-(m4ver/2)^2)/(m4ver)')dnl
ifelse(m4osh,,,`{line invis from svec_(m4o+m4hor,0) \
to svec_(m4o+m4hor/3, m4ver/2) then to svec_(m4o+m4hor/3,-m4ver/2) \
then to svec_(m4o+m4hor,0) shaded m4osh}')
ArcN: arc cw from svec_(m4o+m4hor/3, m4ver/2) \
to svec_(m4o+m4hor,0) with .c at svec_(m4o+m4hor/3,-m4m) m4gfill
ArcS: arc ccw from svec_(m4o+m4hor/3,-m4ver/2) \
to svec_(m4o+m4hor,0) with .c at svec_(m4o+m4hor/3,m4m) m4gfill
')dnl
sc_draw(`dna_',NNE,
`N_NNE: NOT_circle \
at svec_(m4o+m4hor/3,-m4m)+svec_(Rect_(m4ver/2+m4m+N_rad,60))
NNE: svec_(m4o+m4hor/3,-m4m)+svec_(Rect_(m4ver/2+m4m+N_diam,60))
')dnl
sc_draw(`dna_',NSE,
`N_NSE: NOT_circle \
at svec_(m4o+m4hor/3,m4m)+svec_(Rect_(m4ver/2+m4m+N_rad,-60))
NSE: svec_(m4o+m4hor/3,m4m)+svec_(Rect_(m4ver/2+m4m+N_diam,-60))
')dnl
sc_draw(`dna_',NE, `NE: svec_(m4o+m4hor/3,-m4m)+svec_(Rect_(m4ver/2+m4m,60))
')dnl
sc_draw(`dna_',SE, `SE: svec_(m4o+m4hor/3,m4m)+svec_(Rect_(m4ver/2+m4m,-60))
')dnl
ifelse(ifinstr(`$1',N,1)`'ifinstr(`$1',P,1),,
`sc_draw(`dna_',NI, `m4O_defs(ifelse(`$1',,2,`$1'),N)')
')dnl
sc_draw(`dna_',NN, `N_NN: NOT_circle \
at svec_(m4o+m4hor/6,m4ver/2+N_rad)
NN: svec_(m4o+m4hor/6,m4ver/2+N_diam)
')dnl
sc_draw(`dna_',NS, `N_NS: NOT_circle \
at svec_(m4o+m4hor/6,-m4ver/2-N_rad)
NS: svec_(m4o+m4hor/6,-m4ver/2-N_diam)
')dnl
sc_draw(`dna_',NO, `N_Out: NOT_circle \
at svec_(m4o+m4hor+N_rad,0)
Out: svec_(m4o+m4hor+N_diam,0)
')dnl
sc_draw(`dna_',O, `Out: svec_(m4o+m4hor,0)
')dnl
sc_draw(`dna_',N, `N: svec_(m4o+m4hor/6,m4ver/2)
')dnl
ifelse(ifinstr(`$1',N,1)`'ifinstr(`$1',P,1),,
`sc_draw(`dna_',I, `m4O_defs(ifelse(`$1',,2,`$1'))')',
`m4O_defs(`$1')')
sc_draw(`dna_',S, `S: svec_(m4o+m4hor/6,-m4ver/2)
')dnl
sc_draw(`dna_',C, `C: svec_(m4o+m4hor/2,0)')
`$6']')
`Input locations, curved face
m4O_defs(n,[N]) or m4O_defs(string)
string = one or more N|P
otherwise n inputs (negated if arg2 is N)
Input points are defined as Inx
and NOT circles as N_Inx where x is integer'
define(`m4O_defs',`define(`m4arg1',ifelse(`$1',,2,`$1'))dnl
ifelse(ifinstr(m4arg1,N,1)`'ifinstr(m4arg1,P,1),,
`m4dupstr(ifinstr(`$2',N,N,P),m4arg1,`m4OI')define(`m4OnI',m4arg1)',
`define(`m4OI',m4arg1)define(`m4OnI',len(m4arg1))')dnl
define(`m4om',`m4ver/2/min(m4OnI,Mx_pins-1)*min(m4OnI,3*(Mx_pins-1))')dnl
ifelse(eval(m4OnI>Mx_pins),1,
`arc ccw from svec_(0,m4ver/2) \
to svec_(0,m4ver) + M4O_pos(m4om-m4ver) \
with .c at svec_(-M4O_dst,m4ver)
arc cw from svec_(0,-m4ver/2) \
to svec_(0,-m4ver) +M4O_pos(-(m4om-m4ver))\
with .c at svec_(-M4O_dst,-m4ver)
')dnl
define(`m4on',`(eval((m4OnI-Mx_pins+1)/2))')dnl
for_(1,m4OnI,1,
`define(`m4oq',`m4ver/2/min(m4OnI,Mx_pins-1)*(m4OnI+1-2*m4x)')dnl
In`'m4x: ifelse(eval(m4x<=m4on),1,`svec_(0, m4ver)+M4O_pos(m4oq-m4ver)',
eval(m4x>(m4OnI-m4on)),1, `svec_(0,-m4ver)+M4O_pos(m4oq+m4ver)',
`M4O_pos(m4oq)')
ifelse(substr(m4OI,0,1),N,
`N_In`'m4x: NOT_circle \
at In`'m4x+svec_(-N_rad,0)
In`'m4x: In`'m4x+svec_(-N_diam,0)
')dnl
define(`m4OI',substr(m4OI,1))dnl
')
')
define(`M4O_dst',`sqrt((OR_rad*m4ver/(AND_ht))^2-(m4ver/2)^2)')
define(`M4O_pos',`svec_(-M4O_dst+sqrt((OR_rad*m4ver/(AND_ht))^2-(`$1')^2),
`$1')')
`IOdefs(linespec,label,[P|N]*,L|R)
Distribute named locations with optional NOT
circles along a line
eg IOdefs(up 1,Z,PNN,R) defines Z1 at 1/6
along the line, NOT circles N_Z2 and N_Z3 to
the right at 1/2 and 5/6 along the line with
Z2 and Z3 labeled at their right edges'
define(`IOdefs',`define(`m4dm',`ifelse(`$3',,1,len(`$3'))')
define(`m4da',`$3')define(`m4dv',`ifelse(`$2',,In,`$2')')
M4TL: move `$1'
M4PL: vperp(M4TL,L_unit)
for_(1,m4dm,1,
`m4dv`'m4x: ((m4x-1/2)/m4dm between M4TL.start and M4TL.end) dnl
ifelse(substr(m4da,0,1),N,`\
ifelse(`$4',R,-,+)(M4PL.x*N_diam,M4PL.y*N_diam)
{N_`'m4dv`'m4x: NOT_circle \
at m4dv`'m4x ifelse(`$4',R,+,-)(M4PL.x*N_rad,M4PL.y*N_rad)}')
define(`m4da',substr(m4da,1))') ')
`BUFFER_gen(chars, wd, ht,
[N|P]*, [N|P]*, [N|P]*, attributes)
chars: T=triangle (default),
[N]O=output location Out (NO draws circle
N_Out);
[N]I,[N]N,[N]S,[N]NE,[N]SE input locations
C=centre location. Args 4-6 define In, NE,
and SE argument sequences'
define(`BUFFER_gen',
`define(`m4h',`ifelse(`$2',,BUF_wd,`($2)/(L_unit)')')define(`m4y',m4h)dnl
define(`m4v',`ifelse(`$3',,BUF_ht,`($3)/(L_unit)')')dnl
define(`dna_',ifelse(`$1',,ITOCNESE,`$1'))dnl
define(`m4z',`N_rad/vlength(m4h,m4v/2)')dnl
[sc_draw(`dna_',T,`Tm: line from svec_(m4h,0) \
to svec_(0,-m4v/2) \
then to svec_(0,m4v/2) \
then to svec_(m4h,0) Lg_body `$7'
Tc: svec_(m4h/2,0)
')dnl
sc_draw(`dna_',NNE,`N_NNE: NOT_circle \
at svec_(m4h/2,m4v/4)+svec_(m4v/2*m4z,m4h*m4z)
NNE: svec_(m4h/2,m4v/4)+svec_(m4v*m4z,m4h*2*m4z)
')dnl
sc_draw(`dna_',NSE,`N_NSE: NOT_circle \
at svec_(m4h/2,-m4v/4)-svec_(-m4v/2*m4z,m4h*m4z)
NSE: svec_(m4h/2,-m4v/4)-svec_(-m4v*m4z,m4h*2*m4z)
')dnl
sc_draw(`dna_',NI,`define(`m4y',m4y+N_diam) In1: svec_(-N_diam,0)
N_In1: NOT_circle \
at svec_(-N_rad,0)
')dnl
sc_draw(`dna_',NE, `NE: svec_(m4h/2,m4v/4)
')dnl
sc_draw(`dna_',SE, `SE: svec_(m4h/2,-m4v/4)
')dnl
sc_draw(`dna_',NN, `N_NN: NOT_circle \
at svec_(0,m4v/2+N_rad)
NN: svec_(0,m4v/2+N_diam)
')dnl
sc_draw(`dna_',NS, `N_NS: NOT_circle \
at svec_(0,-m4v/2-N_rad)
NS: svec_(0,-m4v/2-N_diam)
')dnl
sc_draw(`dna_',NO,`define(`m4y',m4y+N_diam) Out: svec_(m4h+N_diam,0)
N_Out: NOT_circle \
at svec_(m4h+N_rad,0)
')dnl
sc_draw(`dna_',N, `N: svec_(0,m4v/2)
')dnl
sc_draw(`dna_',S, `S: svec_(0,-m4v/2)
')dnl
sc_draw(`dna_',O, `Out: svec_(m4h,0)
')dnl
sc_draw(`dna_',I, `In1: (0,0)
')dnl
sc_draw(`dna_',C, `C: svec_(m4h/3,0)
')dnl
ifelse(`$4',,,`IOdefs(from svec_(0,m4v/2) to svec_(0,-m4v/2),In,`$4',R)')
ifelse(`$5',,,`IOdefs(from svec_(0,m4v/2) to svec_(m4h,0),NE,`$5')')
ifelse(`$6',,,`IOdefs(from svec_(0,-m4v/2) to svec_(m4h,0),SE,`$6',R)')
`$8']')
`BUFFER_gate(linespec, [N|B], wid, ht,
[N|P]*, [N|P]*, attributes)
When linespec is blank then the element is
composite and In1, Out, C, NE, and SE are
defined; otherwise the element is drawn as
two-terminal
arg2: B=box gate'
Args 5 and 6 define NE and SE argument
sequences'
define(`BUFFER_gate',`ifinstr(`$2',B,
`BOX_gate(ifinstr(`$2',N,N,P),P,ifelse(`$3',,,`($3)/(L_unit)'),
ifelse(`$4',,,`($4)/(L_unit)'),1,`$5',Lg_body `$7')',
`ifelse(`$1',,
`BUFFER_gen(ifelse(`$2',N,N)ITOCNESE,`$3',`$4',,`$5',`$6',
Lg_body `$7',`$8')',
`eleminit_(`$1')
{ BUFFER_gen(ifelse(`$2',N,N)ITOC,`$3',`$4',,`$5',`$6',Lg_body `$7',`$8') \
with .Tc at last line.c }
{ line to last [].In1; line from last [].Out to 2nd last line.end }
line invis to rvec_(rp_len,0)')')')
`NOT_gate(linespec, [B][N|n], wid, ht,
attributes)
When linespec is blank then the element is
composite and In1, Out, C, NE, and SE are
defined; otherwise the element is drawn as
two-terminal
arg2: B=box gate, N=negated input and
output, n=negated input only'
define(`NOT_gate',`ifinstr(`$2',B,
`BOX_gate(ifinstr(`$2',N,N,`$2',n,N,P),ifinstr(`$2',n,P,N),
ifelse(`$3',,,`($3)/(L_unit)'),ifelse(`$4',,,`($4)/(L_unit)'),1,
Lg_body `$5',`$6')',
`ifelse(`$1',,
`BUFFER_gen(ifinstr(`$2',N,N,`$2',n,N)IT`'ifinstr(`$2',n,,N)OCNESE,
`$3',`$4',,,,Lg_body `$5',`$6')',
`eleminit_(`$1')
{ BUFFER_gen(ifinstr(`$2',N,N,`$2',n,N)IT`'ifinstr(`$2',n,,N)OC,
`$3',`$4',,,,Lg_body `$5',`$6') \
with .C at last line.c }
{ line to last [].In1; line from last [].Out to 2nd last line.end }
line invis to rvec_(rp_len,0)')')')
###############################
`The comprehensive logic pin:
lg_pin(location, label, Picname, n|e|s|w [L|M|I|O][N][E], pinno, optlen)
label=text (indicating logical pin function, usually)
Picname=pic label for referring to the pin
n|e|s|w=orientation (north, east, south, west)
L=active low out; M=active low in; I=inward arrow; O=outward arrow
N=negated (NOT-circle); E=edge trigger'
define(`lg_pin',`ifelse(`$1',,,`move to $1')
define(`dna_',`substr(`$4',1)')define(`m4lE',)define(`m4lch',0)dnl
define(`m4ld',`ifelse(`$4',,e,`substr(`$4',0,1)')')dnl
define(`m4lph',`ifelse(m4ld,n,0,m4ld,w,-1,m4ld,s,0,1)')dnl
define(`m4lpv',`ifelse(m4ld,n,1,m4ld,w,0,m4ld,s,-1,0)')dnl
define(`m4lpl',`ifelse(`$6',,`lg_plen',(`$6')/L_unit)')dnl
sc_draw(`dna_',E,`define(`m4lE',1)dnl
{ line from rsvec_(lp_xy(0,N_rad)) \
to rsvec_(lp_xy(-N_diam*sqrt(3)/2,0)) then to rsvec_(lp_xy(0,-N_rad)) }')
ifelse(`$2',,,
`{ lg_pintxt(`$2') ifelse(m4ld,w,`ljust_', m4ld,n,`below_',
m4ld,s,`above_',`rjust_') at Here dnl
ifxfig(`+(lp_xy(-0.72bp__,0))') dnl
ifelse(m4lE,1,`+svec_(lp_xy(-N_diam*sqrt(3)/2,0))') }')
sc_draw(`dna_',N,`define(`m4lch',N_diam*L_unit)
{ NOT_circle \
at rsvec_(lp_xy(N_rad,0)) }')
sc_draw(`dna_',L,`define(`m4lch',N_rad*2.5*L_unit)
{line from rsvec_(lp_xy(0,
ifelse(m4ld,w,-,m4ld,s,-)N_rad*3/2)) to rsvec_(lp_xy(N_rad*2.5,0)) \
then to Here }')
sc_draw(`dna_',M,`define(`m4lch',N_rad*2.5*L_unit)
{ line to rsvec_(lp_xy(N_rad*2.5,
ifelse(m4ld,w,-,m4ld,s,-)N_rad*3/2)) then to rsvec_(lp_xy(N_rad*2.5,0)) \
then to Here}')
{ifelse(`$3',,,`$3':) line to rsvec_(lp_xy(m4lpl,0)) chop m4lch chop 0 dnl
ifinstr(dna_,I,` <- wid linethick*5.6bp__ ht linethick*7.2bp__ ')dnl
ifinstr(dna_,O,` -> wid linethick*5.6bp__ ht linethick*7.2bp__ ')
ifelse(`$5',,,`move to last line.c; lg_pintxt(`$5') dnl
ifelse(m4ld,n,`rjust_', m4ld,w,`above_',m4ld,e,`above_',`rjust_')')
} ')
define(`lp_xy',`vrot_(`$1',`$2',m4lph,m4lpv)')
`Mux(ni, label,
[L][B|H|X][N[n]|S[n]][[N]OE],
wid, ht, attributes)
ni = number of inputs (default 2)
The input pins are lines named
In0, In1, ... In<ni-1>
chars:
L reverses pin numbering,
B pin number labels in binary form,
H pin number labels in hex form,
X disable pin labels
N[n] puts pin Sel or pins Sel0 .. Seln
at the top (with respect to the drawing
direction)
S[n] puts the Sel inputs at the
bottom (default)
OE adds the OE input, NOE negated '
define(`Mux',`[
define(`m4Mwid',`ifelse(`$4',,Mux_wid,((`$4')/(L_unit)))')dnl
define(`m4Mht',`ifelse(`$5',,Mux_ht,((`$5')/(L_unit)))')dnl
W: (0,0)
C: svec_(m4Mwid/2,0)
E: svec_(m4Mwid,0)
NW: svec_(0,m4Mht/2)
SW: svec_(0,-m4Mht/2)
NE: svec_(m4Mwid,m4Mht/2-2)
SE: svec_(m4Mwid,-m4Mht/2+2)
Line: line from W to NW then to NE then to SE then to SW then to W \
Lg_body`$6'
ifelse(`$2',,,`"ifsvg(`svg_small($2,75)',`\scriptsize $2')" at C')
lg_pin(E,,Out,e)
define(`m4Mdna',`$3')define(`m4MOE')dnl
sc_draw(`m4Mdna',L,`define(`m4ML',-)',`define(`m4ML')')dnl
define(`m4MN')define(`m4MSel',S)dnl
sc_draw(`m4Mdna',B,`define(`m4MN',B)')dnl
sc_draw(`m4Mdna',H,`define(`m4MN',H)')dnl
sc_draw(`m4Mdna',X,`define(`m4MN',X)')dnl
sc_draw(`m4Mdna',NOE,`define(`m4MOE',N)')dnl
sc_draw(`m4Mdna',OE,`define(`m4MOE',O)')dnl
sc_draw(`m4Mdna',N,`define(`m4MSel',N)')dnl
sc_draw(`m4Mdna',S,`define(`m4MSel',S)')dnl
define(`m4Mn',`ifelse(`$1',,2,`ifelse(m4MOE,,`$1',incr(eval(`$1')))')')dnl
ifinstr(m4MSel,N, dnl Draw Sel pins
`ifelse(m4Mdna,,`lg_pin((0.5 between NW and NE),,Sel,n)',`for_(1,m4Mdna,1,`
lg_pin((m4x-0.5)/m4Mdna between NW and NE,,Sel`'eval(m4x-1),n)')')',
`ifelse(m4Mdna,,`lg_pin((0.5 between SW and SE),,Sel,s)',`for_(1,m4Mdna,1,`
lg_pin((m4x-0.5)/m4Mdna between SW and SE,,Sel`'eval(m4x-1),s)')')')
for_(1,m4Mn,1,`lg_pin( dnl Draw In pins
svec_(0,m4ML`'m4Mht*(0.5+(0.5-m4x)/m4Mn)),
define(`m4MNO',`ifelse(m4x,m4Mn,ifelse(m4MOE,,,N))')dnl
ifelse(m4MNO,,
`ifelse(m4MN,X,,
m4MN,B,`define(`m4dg',`ifelse(eval(`$1'>8),1,4,eval(`$1'>4),1,3,
eval(`$1'>2),1,2,1)') binary_(decr(m4x),m4dg)',
m4MN,H,`define(`m4dg',`ifelse(eval(`$1'>16),1,2,1)')dnl
hexadecimal_(decr(m4x),m4dg)',
decr(m4x))',
`ifelse(m4MN,X,,`ifelse(m4MOE,N,lg_bartxt(OE),OE)')'),
ifelse(m4MNO,,In`'decr(m4x),ifelse(m4MOE,N,N)OE),
w`'ifelse(m4MNO,,,ifelse(m4MOE,N,N)))')
`$7']')
`Demux(no, label,
[L][B|H|X][N[n]|S[n]][[N]OE],
wid, ht, attributes)
no = number of outputs (default 2)
The output pins are lines named
Out0, Out1, ... Out<ni-1>
chars:
L reverses pin numbering,
B displays binary pin numbers,
H displays hexadecimal pin numbers,
X disable pin labels
N[n] puts Sel or Sel0 .. Seln at the top
(with respect to the drawing direction)
S[n] puts the Sel inputs at the
bottom (default)
OE adds the OE input, NOE negated '
define(`Demux',`[
define(`m4Dwid',`ifelse(`$4',,Mux_wid,((`$4')/(L_unit)))')dnl
define(`m4Dht',`ifelse(`$5',,Mux_ht,((`$5')/(L_unit)))')dnl
W: (0,0)
C: svec_(m4Dwid/2,0)
E: svec_(m4Dwid,0)
NW: svec_(0,m4Dht/2-2)
SW: svec_(0,-m4Dht/2+2)
NE: svec_(m4Dwid,m4Dht/2)
SE: svec_(m4Dwid,-m4Dht/2)
Line: line from W to NW then to NE then to SE then to SW then to W \
Lg_body `$6'
ifelse(`$2',,,`"ifsvg(`svg_small($2,75)',`\scriptsize $2')" at C')
# lg pin(location, label, Picname, n|e|s|w [L|M|I|O][N][E], pinno, optlen)
lg_pin(W,,In,w)
define(`m4Ddna',`$3')define(`m4DOE')dnl
sc_draw(`m4Ddna',L,`define(`m4DL',-)',`define(`m4DL')')dnl
define(`m4DN')define(`m4DSel',S)dnl
sc_draw(`m4Ddna',B,`define(`m4DN',B)')dnl
sc_draw(`m4Ddna',H,`define(`m4DN',H)')dnl
sc_draw(`m4Ddna',X,`define(`m4DN',X)')dnl
sc_draw(`m4Ddna',NOE,`define(`m4DOE',N)')dnl
sc_draw(`m4Ddna',OE,`define(`m4DOE',O)')dnl
sc_draw(`m4Ddna',N,`define(`m4DSel',N)')dnl
sc_draw(`m4Ddna',S,`define(`m4DSel',S)')dnl
define(`m4Dn',`ifelse(`$1',,2,`$1')')dnl
ifinstr(m4DSel,N,
`ifelse(m4Ddna,,`lg_pin((0.5 between NW and NE),,Sel,n)',`for_(1,m4Ddna,1,`
lg_pin((m4x-0.5)/m4Ddna between NW and NE,,Sel`'eval(m4x-1),n)')')',
`ifelse(m4Ddna,,`lg_pin((0.5 between SW and SE),,Sel,s)',`for_(1,m4Ddna,1,`
lg_pin((m4x-0.5)/m4Ddna between SW and SE,,Sel`'eval(m4x-1),s)')')')
# lg pin(location, label, Picname, n|e|s|w [L|M|I|O][N][E], pinno, optlen)
for_(1,m4Dn,1,`lg_pin(
svec_(m4Dwid,m4DL`'m4Dht*(0.5+(0.5-m4x)/m4Dn)),
ifelse(m4DN,X,,
m4DN,B,`define(`m4dg',`ifelse(eval(`$1'>8),1,4,eval(`$1'>4),1,3,
eval(`$1'>2),1,2,1)') binary_(decr(m4x),m4dg)',
m4DN,H,`define(`m4dg',`ifelse(eval(`$1'>16),1,2,1)')dnl
hexadecimal_(decr(m4x),m4dg)',
decr(m4x)),
Out`'decr(m4x),
e)')
ifelse(m4DOE,,,`ifelse(m4DOE,N,
`lg_pin(svec_(0,m4Dht*(0.5+(1-m4Dn)/m4Dn)),lg_bartxt(OE),NOE,wN)',
`lg_pin(svec_(0,m4Dht*(0.5+(1-m4Dn)/m4Dn)),OE,OE,w)')')
`$7']')
Style parameters
define(`gatelineth',linethick) #define(`gatelineth',1.0) use absolute pt
define(`lineth',linethick) #define(`lineth',0.5)
define(`autoinputsep',`(BUF_ht*L_unit*5/4)') # distance between inputs
define(`autovsep',`L_unit') # vertical separation between input gates
##########
Draw the gate with input sublayer Sg containing
gates G1, G2, ...
Example: `AutoGate(AND,$@)'
define(`AutoGate',`[
lu = L_unit define(`m4dirt',m4_dir_)
dnl Count the arguments (inputs) (could use $# )
pushdef(`m4nargs',0)dnl
Loopover_(`arg',`define(`m4nargs',incr(m4nargs))',shift($@))dnl
ifinstr(`$2',[,`define(`m4nargs',decr(m4nargs))dnl
define(`m4PN',substr(`$2',1,eval(len(`$2')-2)))')
`#' m4Delch(`$1') gate(m4nargs)
# Draw the gate
linethick = gatelineth
ifelse(m4Delch(`$1'),NOT,`Q: NOT_gate()',
m4Delch(`$1'),BUFFER,`Q: BUFFER_gate()',
`Q: m4Delch(`$1')_gate(ifinstr(`$2',[,m4PN,m4nargs))') `#' End Q
linethick = lineth
ifelse(substr(m4Delch(`$1'),0,1),N,
`Out: Q.Out',
`line thick lineth from Q.Out m4dirt N_diam*L_unit; Out: Here')
pushdef(`AutoOutNames',m4Path.Out)
T: ifelse(m4dirt,right,`Q.w-(2*lu,0)',`Q.e+(2*lu,0)')
# Sublayer Sg containing gates or vars G1, G2,...
# with output vertical median at the height of Q.c
Sg: [ pushdef(`m4_nct',0)dnl
pushdef(`m4Path',m4Path.Sg)dnl
Loopover_(`arg',
`define(`m4_nct',incr(m4_nct))dnl
dnl Variable or a sublayer gate
dnl Inputs are labelled In<var>_N or In<var>_X
dnl Remove initial white space; detect a name or gate
pushdef(`m4Path',m4Path.G`'m4_nct)dnl
m4ifboolvar_(arg,
`G`'m4_nct: [dnl
ifelse(substr(arg,0,1),~,
`define(`m4xg',substr(arg,1))dnl
pushdef(`m4InNames',m4Path.In`'m4xg`'_N)define(N_`'m4xg)dnl
In`'m4xg`'_N: Here',
`pushdef(`m4InNames',m4Path.In`'arg`'_X)define(X_`'arg)dnl
In`'arg`'_X: Here ')
Out: Here ] ht \
ifelse(m4nargs,1,`2*autovsep',`abs(Q.In1.y-Q.In2.y)-autovsep')',
`pushdef(`AutoOutNames',m4Path.Out)dnl
G`'m4_nct: m4Delch(arg)') ifelse(m4_nct,1,,`ifelse(m4dirt,right, \
`with .ne at last [].se',`with .nw at last [].sw')+(0,-autovsep)')
popdef(`m4Path') ',
ifinstr(`$2',[,`shift(shift($@))',`shift($@)'))
MidOut: 0.5 between G`'eval((m4_nct+1)/2).Out and G`'eval((m4_nct+2)/2).Out
popdef(`m4_nct')dnl
popdef(`m4Path')dnl
] with .MidOut at T+(ifelse(m4dirt,right,-)m4nargs*lu,0) # end Sg
# Draw the connecting lines
define(`m4hhv',`(m4nargs-1)/2')dnl
ifelse(m4dirt,right,
`for_(1,m4nargs,1,`ifelse(m4x,1,,` ')line thick lineth from Q.In`'m4x \
left Q.In`'m4x.x-T.x+(m4hhv-abs(m4x-m4hhv-1))*lu \
then up Sg.G`'m4x.Out.y-Q.In`'m4x.y \
then to Sg.G`'m4x.Out')',
`for_(1,m4nargs,1,`line thick lineth from Q.In`'eval(m4nargs+1-m4x) \
right T.x-Q.In`'eval(m4nargs+1-m4x).x+(m4hhv-abs(m4x-m4hhv-1))*lu \
then up Sg.G`'m4x.Out.y-Q.In`'eval(m4nargs+1-m4x).y \
then to Sg.G`'m4x.Out')')
popdef(`m4nargs') m4xpand(m4dirt`'_) ]')
Empty a stack while nonblank, executing arg2
define(`m4stackdump',`ifdef(`$1',`ifelse($1,,`popdef(`$1')',
`$2`'popdef(`$1')m4stackdump(`$1',`$2')')')')dnl
define(`DrawIn',`
# Draw and label input $1
PrevInput: PrevInput-ifdef(`m4LI',`(0,autoinputsep)',
`(ifelse(m4_dir_,left,-)autoinputsep,0)')
In`'$1: PrevInput define(`m4dirt',m4_dir_)
ifinstr(`$2',N,
` line thick lineth from PrevInput ifdef(`m4LI',m4_dir_`'_,down_) dimen_/2
linethick = gatelineth
NOT_gate
linethick = lineth
InNt`'$1: Here',
` line thick lineth from PrevInput ifdef(`m4LI',m4_dir_,down) dimen_/4
Int`'$1: Here')
m4xpand(m4dirt`'_)
')
define(`DrawInNotIn',`
# Draw and label input $1 inverted and uninverted.
PrevInput: PrevInput-ifdef(`m4LI',`(0,autoinputsep)',
`(ifelse(m4_dir_,left,-)autoinputsep*2,0)')
In`'$1: PrevInput define(`m4dirt',m4_dir_)
line thick lineth from PrevInput ifdef(`m4LI',m4_dir_,down) dimen_/4
ifdef(`m4LI',`PrevInput: PrevInput-(0,autoinputsep)')
Int`'$1: dot
line thick lineth ifdef(`m4LI',down,m4_dir_) autoinputsep \
then ifdef(`m4LI',m4_dir_`'_,down_) dimen_/4
linethick = gatelineth
NOT_gate
linethick = lineth
InNt`'$1: Here; m4xpand(m4dirt`'_)
')
` Example: Autologic(`Nor(`And(x,y)',`And(~x,z)')')
Second example, (the same function):
Autologic(ZNor(ZAnd(x,y),ZAnd(~x,z)))
'
define(`Autologic',
`print `"*** Circuit_macros warning: Autologic is obsolete; use Autologix"'
Autologix($@)')
')
############################
`Autologix(FunctionSpec;FunctionSpec;... ,
[M[irror]]
[N[oconnect]]
[L[eftinputs]]
[R][V]
[;offset=val],
fill spec)
FunctionSpec =
Boolean-fn(args) [@ location attribute]'
` e.g. HalfAdder: Autologix(Xor(x,y);And(x,y),LVR)
Drawing single gates is not enough; more general Boolean expressions
in function notation should be drawn automatically. This macro draws
one or more trees of gates with the output or outputs
(roots) to the right (on the left if the M[irror] option is used).
The predefined functions are And, Or, Not, Nand, Nor, Xor, Nxor,
and Buffer, and may be nested; e.g., Or(And(x,~y),And(~x,y)).
Function notation does not model internal connections such as
feedback. However, internal nodes are labelled for later access.
The exact appearance of a tree depends on the order in which
terms and variables appear in the expressions. Gates can be placed
relative to previously drawn objects using the @ location construct;
e.g. @with .nw at last [].sw+(0,-dimen_).
Autologix locates the distinct input variables (with variables preceded
by ~ given NOT gates) in a row or column and connects them to
the internal gates. If x1 (for example) appears as a variable,
then the corresponding input location is Inx1.
Inputs are placed in a row from right to left by default, in the
order in which the variables first appear in the expressions.
An R in the second argument reverses their order and a V reverses
the order in which variables are scanned in the expresssions. An
N in the second argument draws the expression tree or trees only,
suppresses drawing of the inputs, and defines the gate inputs as
In1, In2, ...
Placing inputs in a column on the left using the L option introduces
graphic complexity. Therefore, hand tuning may be required for
complex expressions; putting offset=value in arg2 shifts the array
of inputs. Time will tell whether this can be improved.
Arbitrary subcircuits with inputs In1, In2, ... on the left and at
least one output Out on the right can be included (see the example
containing SRff).
Internal blocks:
Fx contains all the FunctionSpec trees; the input connections
are drawn external to Fx
Each Txi contains an input variable or a function tree
Function tree i is drawn by the `AutoGate' macro.
'
define(`Autologix',
`[ `# Autologix'
dnl Split arg1 into FunctionSpecs
undefine(`m4BooleanR')stacksplit_(`m4BooleanR',`$1',;)dnl
dnl
ifinstr(`$2',L,`define(`m4LI')',`undefine(`m4LI')')dnl
undefine(`m4InNames')undefine(`AutoOutNames')define(`m4Path',)dnl
define(`m4nbf',0)undefine(`m4BooleanFn')undefine(`m4posattr')dnl
dnl Separate functions from position attributes
stackexec_(`m4BooleanR',,
`define(`m4nbf',incr(m4nbf))define(`m4xi',regexp(m4BooleanR,[a-zA-Z_~]))dnl
ifinstr(m4BooleanR,@,`define(`m4xc',index(m4BooleanR,@))dnl
pushdef(`m4BooleanFn',substr(m4BooleanR,m4xi,eval(m4xc-m4xi)))dnl
pushdef(`m4posattr',substr(m4BooleanR,incr(m4xc)))',
`pushdef(`m4BooleanFn',substr(m4BooleanR,m4xi))dnl
pushdef(`m4posattr')')dnl
')dnl
pushdef(`Lg_body',`$3')
dnl Sublayer of functions, outputs Out1, Out2,..
pushdef(`m4Path',ifelse(m4Path,,,m4Path.)Fx)
Fx: [ define(`m4fno',0)dnl
ifinstr(`$2',M,`left_ define(`m4corner',e)',`right_ define(`m4corner',w)')
dnl
stackexec_(`m4BooleanFn',,
`define(`m4fno',incr(m4fno))dnl
pushdef(`m4Path',m4Path.Tx`'m4fno)dnl
dnl Simple variable or gate
m4ifboolvar_(m4BooleanFn,
`Tx`'m4fno: [ifelse(substr(m4BooleanFn,0,1),~,
`define(`m4xg',substr(m4BooleanFn,1))dnl
pushdef(`m4InNames',m4Path.In`'m4xg`'_N)define(N_`'m4xg)
In`'m4xg`'_N: Here',
`pushdef(`m4InNames',m4Path.In`'m4BooleanFn`'_X)dnl
define(X_`'m4BooleanFn)dnl
In`'m4BooleanFn`'_X: Here'); Out: Here ] ht 2*autovsep',
`Tx`'m4fno: m4Delch(m4BooleanFn)') ifelse(m4posattr,,
`ifelse(m4fno,1,,`with .n`'ifinstr(`$2',M,w,e) \
at Tx`'eval(m4fno-1).s`'ifinstr(`$2',M,w,e)+(0,-dimen_/4)')',
m4posattr) dnl
pushdef(`AutoOutNames',m4Path.Out)dnl
popdef(`m4posattr') `#' End Tx`'m4fno
popdef(`m4Path')dnl
dnl Functions drawn
dnl Out and Out1, Out2, ...
pushdef(`AutoOutNames',m4Path.Out`'m4fno)dnl
Out`'m4fno: Tx`'m4fno.Out
ifelse(m4nbf,1,`; Out: Tx1.Out')
') ] `#' End Fx
popdef(`m4Path')dnl
stackreverse_(`m4InNames')dnl
define(`M4TopInput',m4InNames)dnl
dnl
dnl Delete blank names; mark top and bottom inputs
stackexec_(`m4InNames',,`ifelse(m4InNames,,,
`pushdef(`m4R',m4InNames)define(`m4bn',basename_(m4R))dnl
ifdef(Top`'m4bn,,`define(Top`'m4bn,m4R)')define(Bot`'m4bn,m4R)')')
dnl
dnl Check V option
ifinstr(`$2',V,
`stackexec_(`m4R',`m4TAL')stackexec_(`m4TAL',`m4InNames')',
`stackexec_(`m4R',`m4InNames')')
dnl
dnl Count and extract bare input names
undefine(`m4r')undefine(`m4f')define(`m4nargs',0)undefine(`m4N_')dnl
stackexec_(`m4InNames',`m4R',
`define(`m4nargs',incr(m4nargs))define(`m4bn',basename_(`m4InNames'))dnl
ifelse(substr(m4bn,decr(len(m4bn))),N,`define(`m4N_')')dnl
pushdef(`m4r',substr(m4bn,2,eval(len(m4bn)-4)))')dnl
stackexec_(`m4R',`m4InNames')stackexec_(`m4r',`m4f')
dnl
dnl Unique bare input names in forward order
stackexec_(`m4f',,`ifdef(D_`'m4f,,`pushdef(`m4r',m4f)define(D_`'m4f)')')
stackexec_(`m4r',`m4f',`undefine(D_`'m4r)')
dnl
dnl Optional reverse of bare name order
ifinstr(`$2',R,`stackreverse_(`m4f')')
dnl Get the offset=value if any
pushkey_($2,offset,0)dnl
dnl Place reference for row or column of inputs
PrevInput: ifdef(`m4LI',dnl
`ifinstr(`$2',M,
`(Fx.e.x+dimen_/2+m4nargs*2*L_unit`'ifdef(`m4N_',`+(BUF_wd+N_diam)*L_unit'),\
M4TopInput.y+autoinputsep+m4offset)',
`(Fx.w.x-dimen_/2-m4nargs*2*L_unit`'ifdef(`m4N_',`-(BUF_wd+N_diam)*L_unit'),\
M4TopInput.y+autoinputsep+m4offset)')',
`ifinstr(`$2',M,
`Fx.ne+(-(autoinputsep/2+dimen_/4+m4offset),dimen_`'ifdef(`m4N_',,/4))',
`Fx.nw+( autoinputsep/2+dimen_/4+m4offset, dimen_`'ifdef(`m4N_',,/4))')')
popdef(`m4offset') dnl
# Draw inputs right to left or top to bottom
stackexec_(`m4f',`m4r',`ifinstr(`$2',N,,`ifdef(X_`'m4f,
`ifdef(N_`'m4f,`DrawInNotIn(m4f)',`DrawIn(m4f)')',`DrawIn(m4f,N)')')')
stackexec_(`m4r',,`undefine(N_`'m4r)undefine(X_`'m4r)')
dnl
dnl Show the internal inputs in comment lines
dnl `# Internal input names' (m4nargs):dnl
dnl stackexec_(`m4InNames',`m4R',`
dnl `#' m4InNames')
dnl stackexec_(`m4R',`m4InNames')
dnl
# Promote the In and Out locations to the top level
`# Internal gate input labels' (m4nargs):dnl
define(`m4ix',0)dnl
stackexec_(`m4InNames',`m4R',`define(`m4ix',incr(m4ix))
In`'m4ix: m4InNames')
stackexec_(`m4R',`m4InNames')
`# Internal gate output labels (there may be duplicate locations)':dnl
define(`m4ix',0)define(`m4lastout')dnl
stackexec_(`AutoOutNames',,
`ifelse(AutoOutNames,m4lastout,,`define(`m4ix',incr(m4ix))
Out`'m4ix: AutoOutNames define(`m4lastout',AutoOutNames)')')
# Connect the gates to the inputs and clean up
ifinstr(`$2',N,,
`m4AutoConnex(Fx,`m4InNames',ifdef(`m4LI',`ifinstr(`$2',V,Top,Bot)',Bot))')
stackexec_(`m4TAL',,
`define(`m4bn',basename_(m4TAL))undefine(Bot`'m4bn)undefine(Top`'m4bn)')
popdef(`Lg_body')dnl
# Define the outputs
ifelse(m4nbf,1,`Out: Fx.Out')
for_(1,m4nbf,1,`Out`'m4x: Fx.Out`'m4x')
`$4' `# End Autologix'
] ')
define(`m4AutoConnex',`define(`m4cx',0)dnl
define(`m4ltn',`substr(`$2',decr(len(`$2')))')dnl
stackexec_(`$2',`m4TAL',
`define(`m4ltn',substr($2,decr(len($2))))dnl
ifelse(ifelse(m4ltn,N,T,m4ltn,X,T),T,
`define(`m4bn',basename_($2))dnl
define(`m4hn',substr(m4bn,2,eval(len(m4bn)-4)))dnl
define(`m4cx',incr(m4cx))dnl
ifdef(`m4LI',
`Vx: ($1.w.x-(m4nargs-m4cx)*L_unit*2,$2.y)
Tx: In`'ifelse(m4ltn,N,N)t`'m4hn
line thick lineth from $2 to Vx \
then to (Vx,Tx) ifelse($2,m4xpand($3`'m4bn),` then to Tx',`
dot') ',
`Tx: In`'ifelse(m4ltn,N,N)t`'m4hn
line thick lineth from $2 \
to (Tx,$2) ifelse($2,m4xpand($3`'m4bn),` then to Tx',`
dot')')
')dnl
')')
`FlipFlopX( boxspec, center label,
leftpins, toppins, rightpins, bottompins,
pinlength)
General flipflop. Arg1 modifies the
box (labelled Chip) default specification.
Each of args 3 to 6 is null or a string of
pinspecs separated by semicolons (;).
A pinspec is either empty (null) or of the form
[pinopts]:[label[:Picname]]. The first colon (:)
draws the pin. Pins are placed top to bottom
or left to right along the box edges with null
pinspecs counted for placement. Pins are named
by side and number by default; eg W1, W2, ...,
N1, N2, ..., E1, ..., S1, ... ; however, if
:Picname is present in a pinspec then Picname
replaces the default name. A pinspec label is text
placed at the pin base. Semicolons are not
allowed in labels; use eg \char59{} instead.
To put a bar over a label, use lg_bartxt(label).
The pinopts are [L|M|I|O][N][E]
L=active low out; M=active low in;
I=inward arrow; O=outward arrow;
N=pin with not circle; E=edge trigger
Optional arg7 is the length of pins'
define(`FlipFlopX',`[
Chip: box wid_ FF_wid*L_unit ht_ FF_ht*L_unit Lg_body `$1'
dnl Center label
ifelse(`$2',,,"ifsvg(`svg_small($2,75)',`\scriptsize $2')" at Chip.c)
ifelse(`$7',,,`pushdef(`lg_plen',(`$7')/L_unit)')dnl
ifelse(`$3',,,
`m4_ffside(`(m4x-0.5)/m4_pc between Chip.nw_ and Chip.sw_',`$3',W,w)')
ifelse(`$4',,,
`m4_ffside(`(m4x-0.5)/m4_pc between Chip.nw_ and Chip.ne_',`$4',N,n)')
ifelse(`$5',,,
`m4_ffside(`(m4x-0.5)/m4_pc between Chip.ne_ and Chip.se_',`$5',E,e)')
ifelse(`$6',,,
`m4_ffside(`(m4x-0.5)/m4_pc between Chip.sw_ and Chip.se_',`$6',S,s)')
ifelse(`$7',,,`popdef(`lg_plen')')dnl
`$8' ]')
dnl `Stack, count, and draw the pins on the given side'
define(`m4_ffside',
`stacksplit_(`m4pr',`$2',;)define(`m4_pc',0)dnl
stackexec_(`m4pr',`m4pspec',`define(`m4_pc',incr(m4_pc))')dnl
for_(1,m4_pc,1,
`ifinstr(m4pspec,:,
`m4drawpin(`$1',`$3'm4x,`$4'm4_pattocomma(m4pspec,:))')dnl
popdef(`m4pspec')')')dnl
define(`m4drawpin',`lg_pin(`$1',`$4',ifelse(`$5',,`$2',`$5'),`$3')')
