4 files changed, 96 insertions, 1 deletions
diff --git a/apps/tile/environment.mu b/apps/tile/environment.mu
index 664cd102..4bfc4cdc 100644
--- a/apps/tile/environment.mu
+++ b/apps/tile/environment.mu
@@ -637,10 +637,44 @@ $process-sandbox-define:body: {
 # aren't defined in the rest of 'functions'. Append them in order.
 # Assumes function body is a single line for now.
 fn copy-unbound-words-to-args _functions: (addr handle function) {
+  # target
+  var target-ah/eax: (addr handle function) <- copy _functions
+  var _target/eax: (addr function) <- lookup *target-ah
+  var target/esi: (addr function) <- copy _target
+  var dest/edi: (addr handle word) <- get target, args
+  # next
+  var functions-ah/eax: (addr handle function) <- get target, next
+  var _functions/eax: (addr function) <- lookup *functions-ah
+  var functions/ecx: (addr function) <- copy _functions
+  # src
+  var line-ah/eax: (addr handle line) <- get target, body
+  var line/eax: (addr line) <- lookup *line-ah
+  var curr-ah/eax: (addr handle word) <- get line, data
+  var curr/eax: (addr word) <- lookup *curr-ah
+  {
+    compare curr, 0
+    break-if-=
+    # HERE
+    var next-ah/ecx: (addr handle word) <- get curr, next
+    curr <- lookup *next-ah
+    loop
+  }
 }
 
 # construct a call to `f` with copies of exactly its args
-fn construct-call f: (addr handle function), out: (addr handle word) {
+fn construct-call _f-ah: (addr handle function), out: (addr handle word) {
+  var f-ah/eax: (addr handle function) <- copy _f-ah
+  var _f/eax: (addr function) <- lookup *f-ah
+  var f/esi: (addr function) <- copy _f
+  var name-ah/eax: (addr handle array byte) <- get f, name
+  var name/eax: (addr array byte) <- lookup *name-ah
+  var dest/edi: (addr handle word) <- copy out
+  allocate-word-with dest, name
+  var tmp/eax: (addr word) <- lookup *dest
+  dest <- get tmp, next
+  var _args-ah/eax: (addr handle word) <- get f, args
+  var args-ah/esi: (addr handle word) <- copy _args-ah
+  copy-words args-ah, dest
 }
 
 fn word-index _words: (addr handle word), _n: int, out: (addr handle word) {
diff --git a/apps/tile/gap-buffer.mu b/apps/tile/gap-buffer.mu
index 47417b96..a6d6a85e 100644
--- a/apps/tile/gap-buffer.mu
+++ b/apps/tile/gap-buffer.mu
@@ -288,3 +288,21 @@ fn test-gap-buffer-equal-from-start? {
   var result/eax: int <- copy _result
   check-ints-equal result, 1, "F - test-gap-buffer-equal-from-start?"
 }
+
+fn copy-gap-buffer _src-ah: (addr handle gap-buffer), _dest-ah: (addr handle gap-buffer) {
+  # obtain src-a, dest-a
+  var src-ah/eax: (addr handle gap-buffer) <- copy _src-ah
+  var _src-a/eax: (addr gap-buffer) <- lookup *src-ah
+  var src-a/esi: (addr gap-buffer) <- copy _src-a
+  var dest-ah/eax: (addr handle gap-buffer) <- copy _dest-ah
+  var _dest-a/eax: (addr gap-buffer) <- lookup *dest-ah
+  var dest-a/edi: (addr gap-buffer) <- copy _dest-a
+  # copy left grapheme-stack
+  var src/ecx: (addr grapheme-stack) <- get src-a, left
+  var dest/edx: (addr grapheme-stack) <- get dest-a, left
+  copy-grapheme-stack src, dest
+  # copy right grapheme-stack
+  src <- get src-a, right
+  dest <- get dest-a, right
+  copy-grapheme-stack src, dest
+}
diff --git a/apps/tile/grapheme-stack.mu b/apps/tile/grapheme-stack.mu
index 401dda2d..3b8d95f9 100644
--- a/apps/tile/grapheme-stack.mu
+++ b/apps/tile/grapheme-stack.mu
@@ -62,6 +62,23 @@ $pop-grapheme-stack:body: {
 }
 }
 
+fn copy-grapheme-stack _src: (addr grapheme-stack), dest: (addr grapheme-stack) {
+  var src/esi: (addr grapheme-stack) <- copy _src
+  var data-ah/edi: (addr handle array grapheme) <- get src, data
+  var _data/eax: (addr array grapheme) <- lookup *data-ah
+  var data/edi: (addr array grapheme) <- copy _data
+  var top-addr/ecx: (addr int) <- get src, top
+  var i/eax: int <- copy 0
+  {
+    compare i, *top-addr
+    break-if->=
+    var g/edx: (addr grapheme) <- index data, i
+    push-grapheme-stack dest, *g
+    i <- increment
+    loop
+  }
+}
+
 # dump stack to screen from bottom to top
 # don't move the cursor or anything
 fn render-stack-from-bottom _self: (addr grapheme-stack), screen: (addr screen) {
diff --git a/apps/tile/word.mu b/apps/tile/word.mu
index d630b176..e9101eb2 100644
--- a/apps/tile/word.mu
+++ b/apps/tile/word.mu
@@ -264,6 +264,32 @@ fn print-words-in-reverse screen: (addr screen), _words-ah: (addr handle word) {
   print-string screen, " "
 }
 
+fn copy-words _src-ah: (addr handle word), _dest-ah: (addr handle word) {
+  var src-ah/eax: (addr handle word) <- copy _src-ah
+  var src-a/eax: (addr word) <- lookup *src-ah
+  compare src-a, 0
+  break-if-=
+  # copy
+  var dest-ah/edi: (addr handle word) <- copy _dest-ah
+  copy-word src-a, dest-ah
+  # recurse
+  var next-src-ah/esi: (addr handle word) <- get src-a, next
+  var dest-a/eax: (addr word) <- lookup *dest-ah
+  var next-dest-ah/eax: (addr handle word) <- get dest-a, next
+  copy-words next-src-ah, next-dest-ah
+}
+
+fn copy-word _src-a: (addr word), _dest-ah: (addr handle word) {
+  var dest-ah/eax: (addr handle word) <- copy _dest-ah
+  allocate dest-ah
+  var _dest-a/eax: (addr word) <- lookup *dest-ah
+  var dest-a/eax: (addr word) <- copy _dest-a
+  var dest/edi: (addr handle gap-buffer) <- get dest-a, scalar-data
+  var src-a/eax: (addr word) <- copy _src-a
+  var src/eax: (addr handle gap-buffer) <- get src-a, scalar-data
+  copy-gap-buffer src, dest
+}
+
 # one implication of handles: append must take a handle
 fn append-word _self-ah: (addr handle word) {
   var self-ah/esi: (addr handle word) <- copy _self-ah