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bitwise ops, unary negation

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This commit is contained in:
Jeremy Penner 2021-08-11 23:54:37 -04:00
parent 65101ad21d
commit 81ea4a4410
2 changed files with 26 additions and 30 deletions
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17
neutgs/init.fnl
View file

@ -20,20 +20,9 @@
(IMStartUp)
(TextStartUp)
(let (x 1 dx 2 lim (if (> dx 0) 10 -10) break [ssc.FALSE])
(while (and (< x lim) (not break))
(printnum x)
(set! x (+ x dx))
(if (= x 6) (set! break [ssc.TRUE]))))
(if (> (+ 1 2) (+ 3 4)) (printnum 0x1212) (printnum 0x3434))
(if (and (or (= 1 2) (< 3 4)) ;
(not (or (> 10 3) (<= 6 5))))
(printnum 0xdead) (printnum 0xbeef))
(let (x 5 y 10 test1 (< x y) test2 (> x y))
(printnum test1) (printnum test2)
(if test1 (printnum 0x1234) (printnum 0x5678))
(if test2 (printnum 0x1234) (printnum 0x5678)))
(printnum (& (- 10) 0xff))
(printnum (| 10 0x8000))
(TextShutDown)
(IMShutDown)
(MMShutDown UserID)

39
ssc/init.fnl
View file

@ -123,6 +123,12 @@
cleanup (icollect [_ {: cleanup} (ipairs args)] (when cleanup (cleanup)))]
(values (lume.concat [:block] setup [acc] operations cleanup) etype)))
(fn Ssc.simple-accumulator [self op etype {: lo : hi} ?defaulthi]
(match etype
:word (lo op)
:long [:block [:lda self.LONG_LO] (lo op) [:sta self.LONG_LO]
[:lda self.LONG_HI] (if hi (hi op) [op (or ?defaulthi 0)]) [:sta self.LONG_HI]]))
; comparisons assume left-hand side was in accumulator and cmp (right-hand side) was just executed.
; For lobranch, the branch should execute if the comparison is FALSE; the label passed is for the false branch.
; For hibranch, the branch should not execute if the low word still needs to be compared; otherwise, $1 is the true branch,
@ -245,24 +251,25 @@
(values (lume.concat block [c-body [:bra :-loop-top-] :-exit-loop-]) :void)))
:+ (lambda [self first ...]
(self:accumulation-op
(fn [etype {: lo : hi : const}]
(match etype
:word (if (= const 1) [:inc] (= const 2) [:block [:inc] [:inc]]
(= const -1) [:dec] (= const -2) [:block [:dec] [:dec]]
[:block [:clc] (lo :adc)])
:long [:block [:clc] (lo :lda) [:adc self.LONG_LO] [:sta self.LONG_LO]
(if hi (hi :lda) [:lda 0]) [:adc self.LONG_HI] [:sta self.LONG_HI]]))
(fn [etype opgen]
(if (and (= etype :word) opgen.const (>= opgen.const -2) (<= opgen.const 2))
(match opgen.const 1 [:inc] 2 [:block [:inc] [:inc]]
-1 [:dec] -2 [:block [:dec] [:dec]])
[:block [:clc] (self:simple-accumulator :adc etype opgen)]))
first ...))
:- (lambda [self first ...]
(self:accumulation-op
(fn [etype {: lo : hi : const}]
(match etype
:word (if (= const 1) [:dec] (= const 2) [:block [:dec] [:dec]]
(= const -1) [:inc] (= const -2) [:block [:inc] [:inc]]
[:block [:sec] (lo :sbc)])
:long [:block [:sec] (lo :lda) [:sbc self.LONG_LO] [:sta self.LONG_LO]
(if hi (hi :lda) [:lda 0]) [:sbc self.LONG_HI] [:sta self.LONG_HI]]))
first ...))
(if (= (select :# ...) 0)
(match (self:type-expr first) :word [:block (self:expr-word first) [:eor 0xffff] [:inc]] ; negate with two's complement
:long (self:expr-poly [:- 0 first])) ; just subtract from 0
(self:accumulation-op
(fn [etype opgen]
(if (and (= etype :word) (>= opgen.const -2) (<= opgen.const 2))
(match opgen.const -1 [:inc] -2 [:block [:inc] [:inc]]
1 [:dec] 2 [:block [:dec] [:dec]])
[:block [:clc] (self:simple-accumulator :adc etype opgen)]))
first ...)))
:| (lambda [self first ...] (self:accumulation-op #(self:simple-accumulator :ora $...) first ...))
:& (lambda [self first ...] (self:accumulation-op #(self:simple-accumulator :and $...) first ...))
:= (lambda [self lhs rhs] (self:cmp-to-bool := lhs rhs))
:not= (lambda [self lhs rhs] (self:cmp-to-bool :not= lhs rhs))
:< (lambda [self lhs rhs] (self:cmp-to-bool :< lhs rhs))