https://github.com/akkartik/mu/blob/main/linux/tile/float-stack.mu

     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   }
    57   return 0/false
    58 }
    59
    60 fn float-stack-length _self: (addr float-stack) -> _/eax: int {
    61   var self/esi: (addr float-stack) <- copy _self
    62   var top-addr/eax: (addr int) <- get self, top
    63   return *top-addr
    64 }