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proc ulam1 {n} {
set max $n
while {$n != 1} {
if {$n > $max} {
set max $n
}
if {$n % 2} {
set n [expr {3 * $n + 1}]
} else {
set n [expr {$n / 2}]
}
}
return $max
}
set tcl_traceCompile 2; ulam1 1; set tcl_traceCompile 0
proc ulam2 {n} {
tcl::unsupported::assemble {
load n; # max
dup; # max n
jump start; # max n
label loop; # max n
over 1; # max n max
over 1; # max in max n
ge; # man n max>=n
jumpTrue skip; # max n
reverse 2; # n max
pop; # n
dup; # n n
label skip; # max n
dup; # max n n
push 2; # max n n 2
mod; # max n n%2
jumpTrue odd; # max n
push 2; # max n 2
div; # max n/2 -> max n
jump start; # max n
label odd; # max n
push 3; # max n 3
mult; # max 3*n
push 1; # max 3*n 1
add; # max 3*n+1
label start; # max n
dup; # max n n
push 1; # max n n 1
neq; # max n n>1
jumpTrue loop; # max n
pop; # max
}
}
set tcl_traceCompile 2; ulam2 1; set tcl_traceCompile 0
proc test1 {n} {
for {set i 1} {$i <= $n} {incr i} {
ulam1 $i
}
}
proc test2 {n} {
for {set i 1} {$i <= $n} {incr i} {
ulam2 $i
}
}
for {set j 0} {$j < 10} {incr j} {
test1 1
set before [clock microseconds]
test1 30000
set after [clock microseconds]
puts "compiled: [expr {1e-6 * ($after - $before)}]"
test2 1
set before [clock microseconds]
test2 30000
set after [clock microseconds]
puts "assembled: [expr {1e-6 * ($after - $before)}]"
}
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