65 lines
1.8 KiB
Forth
65 lines
1.8 KiB
Forth
type float-stack {
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data: (handle array float)
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top: int
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}
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fn initialize-float-stack _self: (addr float-stack), n: int {
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var self/esi: (addr float-stack) <- copy _self
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var d/edi: (addr handle array float) <- get self, data
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populate d, n
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var top/eax: (addr int) <- get self, top
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copy-to *top, 0
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}
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fn clear-float-stack _self: (addr float-stack) {
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var self/esi: (addr float-stack) <- copy _self
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var top/eax: (addr int) <- get self, top
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copy-to *top, 0
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}
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fn push-float-stack _self: (addr float-stack), _val: float {
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var self/esi: (addr float-stack) <- copy _self
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var top-addr/ecx: (addr int) <- get self, top
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var data-ah/edx: (addr handle array float) <- get self, data
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var data/eax: (addr array float) <- lookup *data-ah
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var top/edx: int <- copy *top-addr
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var dest-addr/edx: (addr float) <- index data, top
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var val/xmm0: float <- copy _val
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copy-to *dest-addr, val
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add-to *top-addr, 1
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}
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fn pop-float-stack _self: (addr float-stack) -> _/xmm0: float {
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var self/esi: (addr float-stack) <- copy _self
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var top-addr/ecx: (addr int) <- get self, top
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{
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compare *top-addr, 0
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break-if->
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var zero: float
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return zero
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}
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subtract-from *top-addr, 1
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var data-ah/edx: (addr handle array float) <- get self, data
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var data/eax: (addr array float) <- lookup *data-ah
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var top/edx: int <- copy *top-addr
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var result-addr/eax: (addr float) <- index data, top
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return *result-addr
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}
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fn float-stack-empty? _self: (addr float-stack) -> _/eax: boolean {
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var self/esi: (addr float-stack) <- copy _self
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var top-addr/eax: (addr int) <- get self, top
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compare *top-addr, 0
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{
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break-if-!=
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return 1/true
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}
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return 0/false
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}
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fn float-stack-length _self: (addr float-stack) -> _/eax: int {
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var self/esi: (addr float-stack) <- copy _self
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var top-addr/eax: (addr int) <- get self, top
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return *top-addr
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}
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