mirror of
https://github.com/tursodatabase/libsql.git
synced 2024-12-15 17:59:41 +00:00
326 lines
8.9 KiB
Tcl
326 lines
8.9 KiB
Tcl
#!/usr/bin/tclsh
|
|
#
|
|
# Generate the file opcodes.h.
|
|
#
|
|
# This TCL script scans a concatenation of the parse.h output file from the
|
|
# parser and the vdbe.c source file in order to generate the opcodes numbers
|
|
# for all opcodes.
|
|
#
|
|
# The lines of the vdbe.c that we are interested in are of the form:
|
|
#
|
|
# case OP_aaaa: /* same as TK_bbbbb */
|
|
#
|
|
# The TK_ comment is optional. If it is present, then the value assigned to
|
|
# the OP_ is the same as the TK_ value. If missing, the OP_ value is assigned
|
|
# a small integer that is different from every other OP_ value.
|
|
#
|
|
# We go to the trouble of making some OP_ values the same as TK_ values
|
|
# as an optimization. During parsing, things like expression operators
|
|
# are coded with TK_ values such as TK_ADD, TK_DIVIDE, and so forth. Later
|
|
# during code generation, we need to generate corresponding opcodes like
|
|
# OP_Add and OP_Divide. By making TK_ADD==OP_Add and TK_DIVIDE==OP_Divide,
|
|
# code to translate from one to the other is avoided. This makes the
|
|
# code generator smaller and faster.
|
|
#
|
|
# This script also scans for lines of the form:
|
|
#
|
|
# case OP_aaaa: /* jump, in1, in2, in3, out2, out3 */
|
|
#
|
|
# When such comments are found on an opcode, it means that certain
|
|
# properties apply to that opcode. Set corresponding flags using the
|
|
# OPFLG_INITIALIZER macro.
|
|
#
|
|
|
|
set in stdin
|
|
set currentOp {}
|
|
set prevName {}
|
|
set nOp 0
|
|
set nGroup 0
|
|
while {![eof $in]} {
|
|
set line [gets $in]
|
|
|
|
# Remember the TK_ values from the parse.h file.
|
|
# NB: The "TK_" prefix stands for "ToKen", not the graphical Tk toolkit
|
|
# commonly associated with TCL.
|
|
#
|
|
if {[regexp {^#define TK_} $line]} {
|
|
set tk([lindex $line 1]) [lindex $line 2]
|
|
continue
|
|
}
|
|
|
|
# Find "/* Opcode: " lines in the vdbe.c file. Each one introduces
|
|
# a new opcode. Remember which parameters are used.
|
|
#
|
|
if {[regexp {^.. Opcode: } $line]} {
|
|
set currentOp OP_[lindex $line 2]
|
|
set m 0
|
|
foreach term $line {
|
|
switch $term {
|
|
P1 {incr m 1}
|
|
P2 {incr m 2}
|
|
P3 {incr m 4}
|
|
P4 {incr m 8}
|
|
P5 {incr m 16}
|
|
}
|
|
}
|
|
set paramused($currentOp) $m
|
|
}
|
|
|
|
# Find "** Synopsis: " lines that follow Opcode:
|
|
#
|
|
if {[regexp {^.. Synopsis: (.*)} $line all x] && $currentOp!=""} {
|
|
set synopsis($currentOp) [string trim $x]
|
|
}
|
|
|
|
# Scan for "case OP_aaaa:" lines in the vdbe.c file
|
|
#
|
|
if {[regexp {^case OP_} $line]} {
|
|
set line [split $line]
|
|
set name [string trim [lindex $line 1] :]
|
|
if {$name=="OP_Abortable"} continue; # put OP_Abortable last
|
|
set op($name) -1
|
|
set group($name) 0
|
|
set jump($name) 0
|
|
set in1($name) 0
|
|
set in2($name) 0
|
|
set in3($name) 0
|
|
set out2($name) 0
|
|
set out3($name) 0
|
|
set ncycle($name) 0
|
|
for {set i 3} {$i<[llength $line]-1} {incr i} {
|
|
switch [string trim [lindex $line $i] ,] {
|
|
same {
|
|
incr i
|
|
if {[lindex $line $i]=="as"} {
|
|
incr i
|
|
set sym [string trim [lindex $line $i] ,]
|
|
set val $tk($sym)
|
|
set op($name) $val
|
|
set used($val) 1
|
|
set sameas($val) $sym
|
|
set def($val) $name
|
|
}
|
|
}
|
|
group {set group($name) 1}
|
|
jump {set jump($name) 1}
|
|
in1 {set in1($name) 1}
|
|
in2 {set in2($name) 1}
|
|
in3 {set in3($name) 1}
|
|
out2 {set out2($name) 1}
|
|
out3 {set out3($name) 1}
|
|
ncycle {set ncycle($name) 1}
|
|
}
|
|
}
|
|
if {$group($name)} {
|
|
set newGroup 0
|
|
if {[info exists groups($nGroup)]} {
|
|
if {$prevName=="" || !$group($prevName)} {
|
|
set newGroup 1
|
|
}
|
|
}
|
|
lappend groups($nGroup) $name
|
|
if {$newGroup} {incr nGroup}
|
|
} else {
|
|
if {$prevName!="" && $group($prevName)} {
|
|
incr nGroup
|
|
}
|
|
}
|
|
set order($nOp) $name
|
|
set prevName $name
|
|
incr nOp
|
|
}
|
|
}
|
|
|
|
# Assign numbers to all opcodes and output the result.
|
|
#
|
|
puts "/* Automatically generated. Do not edit */"
|
|
puts "/* See the tool/mkopcodeh.tcl script for details */"
|
|
foreach name {OP_Noop OP_Explain OP_Abortable} {
|
|
set jump($name) 0
|
|
set in1($name) 0
|
|
set in2($name) 0
|
|
set in3($name) 0
|
|
set out2($name) 0
|
|
set out3($name) 0
|
|
set ncycle($name) 0
|
|
set op($name) -1
|
|
set order($nOp) $name
|
|
incr nOp
|
|
}
|
|
|
|
# The following are the opcodes that receive special processing in the
|
|
# resolveP2Values() routine. Update this list whenever new cases are
|
|
# added to the pOp->opcode switch within resolveP2Values().
|
|
#
|
|
set rp2v_ops {
|
|
OP_Transaction
|
|
OP_AutoCommit
|
|
OP_Savepoint
|
|
OP_Checkpoint
|
|
OP_Vacuum
|
|
OP_JournalMode
|
|
OP_VUpdate
|
|
OP_VFilter
|
|
OP_Init
|
|
}
|
|
|
|
# Assign the smallest values to opcodes that are processed by resolveP2Values()
|
|
# to make code generation for the switch() statement smaller and faster.
|
|
#
|
|
set cnt -1
|
|
for {set i 0} {$i<$nOp} {incr i} {
|
|
set name $order($i)
|
|
if {[lsearch $rp2v_ops $name]>=0} {
|
|
incr cnt
|
|
while {[info exists used($cnt)]} {incr cnt}
|
|
set op($name) $cnt
|
|
set used($cnt) 1
|
|
set def($cnt) $name
|
|
}
|
|
}
|
|
set mxCase1 $cnt
|
|
|
|
# Assign the next group of values to JUMP opcodes
|
|
#
|
|
for {set i 0} {$i<$nOp} {incr i} {
|
|
set name $order($i)
|
|
if {$op($name)>=0} continue
|
|
if {!$jump($name)} continue
|
|
incr cnt
|
|
while {[info exists used($cnt)]} {incr cnt}
|
|
set op($name) $cnt
|
|
set used($cnt) 1
|
|
set def($cnt) $name
|
|
}
|
|
|
|
# Find the numeric value for the largest JUMP opcode
|
|
#
|
|
set mxJump -1
|
|
for {set i 0} {$i<$nOp} {incr i} {
|
|
set name $order($i)
|
|
if {$jump($name) && $op($name)>$mxJump} {set mxJump $op($name)}
|
|
}
|
|
|
|
|
|
# Generate the numeric values for all remaining opcodes, while
|
|
# preserving any groupings of opcodes (i.e. those that must be
|
|
# together).
|
|
#
|
|
for {set g 0} {$g<$nGroup} {incr g} {
|
|
set gLen [llength $groups($g)]
|
|
set ok 0; set start -1
|
|
set seek $cnt
|
|
while {!$ok} {
|
|
incr seek
|
|
while {[info exists used($seek)]} {incr seek}
|
|
set ok 1; set start $seek
|
|
for {set j 0} {$j<$gLen} {incr j} {
|
|
incr seek
|
|
if {[info exists used($seek)]} {
|
|
set ok 0; break
|
|
}
|
|
}
|
|
}
|
|
if {$ok} {
|
|
set next $start
|
|
for {set j 0} {$j<$gLen} {incr j} {
|
|
set name [lindex $groups($g) $j]
|
|
if {$op($name)>=0} continue
|
|
set op($name) $next
|
|
set used($next) 1
|
|
set def($next) $name
|
|
incr next
|
|
}
|
|
} else {
|
|
error "cannot find opcodes for group: $groups($g)"
|
|
}
|
|
}
|
|
|
|
for {set i 0} {$i<$nOp} {incr i} {
|
|
set name $order($i)
|
|
if {$op($name)<0} {
|
|
incr cnt
|
|
while {[info exists used($cnt)]} {incr cnt}
|
|
set op($name) $cnt
|
|
set used($cnt) 1
|
|
set def($cnt) $name
|
|
}
|
|
}
|
|
|
|
set max [lindex [lsort -decr -integer [array names used]] 0]
|
|
for {set i 0} {$i<=$max} {incr i} {
|
|
if {![info exists used($i)]} {
|
|
set def($i) "OP_NotUsed_$i"
|
|
}
|
|
if {$i>$max} {set max $i}
|
|
set name $def($i)
|
|
puts -nonewline [format {#define %-16s %3d} $name $i]
|
|
set com {}
|
|
if {[info exists jump($name)] && $jump($name)} {
|
|
lappend com "jump"
|
|
}
|
|
if {[info exists sameas($i)]} {
|
|
lappend com "same as $sameas($i)"
|
|
}
|
|
if {[info exists synopsis($name)]} {
|
|
lappend com "synopsis: $synopsis($name)"
|
|
}
|
|
if {[llength $com]} {
|
|
puts -nonewline [format " /* %-42s */" [join $com {, }]]
|
|
}
|
|
puts ""
|
|
}
|
|
|
|
if {$max>255} {
|
|
error "More than 255 opcodes - VdbeOp.opcode is of type u8!"
|
|
}
|
|
|
|
# Generate the bitvectors:
|
|
#
|
|
set bv(0) 0
|
|
for {set i 0} {$i<=$max} {incr i} {
|
|
set x 0
|
|
set name $def($i)
|
|
if {[string match OP_NotUsed* $name]==0} {
|
|
if {$jump($name)} {incr x 1}
|
|
if {$in1($name)} {incr x 2}
|
|
if {$in2($name)} {incr x 4}
|
|
if {$in3($name)} {incr x 8}
|
|
if {$out2($name)} {incr x 16}
|
|
if {$out3($name)} {incr x 32}
|
|
if {$ncycle($name)} {incr x 64}
|
|
}
|
|
set bv($i) $x
|
|
}
|
|
puts ""
|
|
puts "/* Properties such as \"out2\" or \"jump\" that are specified in"
|
|
puts "** comments following the \"case\" for each opcode in the vdbe.c"
|
|
puts "** are encoded into bitvectors as follows:"
|
|
puts "*/"
|
|
puts "#define OPFLG_JUMP 0x01 /* jump: P2 holds jmp target */"
|
|
puts "#define OPFLG_IN1 0x02 /* in1: P1 is an input */"
|
|
puts "#define OPFLG_IN2 0x04 /* in2: P2 is an input */"
|
|
puts "#define OPFLG_IN3 0x08 /* in3: P3 is an input */"
|
|
puts "#define OPFLG_OUT2 0x10 /* out2: P2 is an output */"
|
|
puts "#define OPFLG_OUT3 0x20 /* out3: P3 is an output */"
|
|
puts "#define OPFLG_NCYCLE 0x40 /* ncycle:Cycles count against P1 */"
|
|
puts "#define OPFLG_INITIALIZER \173\\"
|
|
for {set i 0} {$i<=$max} {incr i} {
|
|
if {$i%8==0} {
|
|
puts -nonewline [format "/* %3d */" $i]
|
|
}
|
|
puts -nonewline [format " 0x%02x," $bv($i)]
|
|
if {$i%8==7} {
|
|
puts "\\"
|
|
}
|
|
}
|
|
puts "\175"
|
|
puts ""
|
|
puts "/* The resolve3P2Values() routine is able to run faster if it knows"
|
|
puts "** the value of the largest JUMP opcode. The smaller the maximum"
|
|
puts "** JUMP opcode the better, so the mkopcodeh.tcl script that"
|
|
puts "** generated this include file strives to group all JUMP opcodes"
|
|
puts "** together near the beginning of the list."
|
|
puts "*/"
|
|
puts "#define SQLITE_MX_JUMP_OPCODE $mxJump /* Maximum JUMP opcode */"
|