1 type float-stack {
 2   data: (handle array float)
 3   top: int
 4 }
 5 
 6 fn initialize-float-stack _self: (addr float-stack), n: int {
 7   var self/esi: (addr float-stack) <- copy _self
 8   var d/edi: (addr handle array float) <- get self, data
 9   populate d, n
10   var top/eax: (addr int) <- get self, top
11   copy-to *top, 0
12 }
13 
14 fn clear-float-stack _self: (addr float-stack) {
15   var self/esi: (addr float-stack) <- copy _self
16   var top/eax: (addr int) <- get self, top
17   copy-to *top, 0
18 }
19 
20 fn push-float-stack _self: (addr float-stack), _val: float {
21   var self/esi: (addr float-stack) <- copy _self
22   var top-addr/ecx: (addr int) <- get self, top
23   var data-ah/edx: (addr handle array float) <- get self, data
24   var data/eax: (addr array float) <- lookup *data-ah
25   var top/edx: int <- copy *top-addr
26   var dest-addr/edx: (addr float) <- index data, top
27   var val/xmm0: float <- copy _val
28   copy-to *dest-addr, val
29   add-to *top-addr, 1
30 }
31 
32 fn pop-float-stack _self: (addr float-stack) -> _/xmm0: float {
33   var self/esi: (addr float-stack) <- copy _self
34   var top-addr/ecx: (addr int) <- get self, top
35   {
36     compare *top-addr, 0
37     break-if->
38     var zero: float
39     return zero
40   }
41   subtract-from *top-addr, 1
42   var data-ah/edx: (addr handle array float) <- get self, data
43   var data/eax: (addr array float) <- lookup *data-ah
44   var top/edx: int <- copy *top-addr
45   var result-addr/eax: (addr float) <- index data, top
46   return *result-addr
47 }
48 
49 fn float-stack-empty? _self: (addr float-stack) -> _/eax: boolean {
50   var self/esi: (addr float-stack) <- copy _self
51   var top-addr/eax: (addr int) <- get self, top
52   compare *top-addr, 0
53   {
54     break-if-!=
55     return 1/true
56   }
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