Fix a couple bugs in z80 assembly, support addresses + function args
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parent
4f40b3851b
commit
fb0c141653
35
asm/z80.fnl
35
asm/z80.fnl
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@ -39,13 +39,6 @@
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(fn opform [opcode matchers prefixgen]
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(fn opform [opcode matchers prefixgen]
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(chain-op opcode #(try-parse-op $1 matchers prefixgen)))
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(chain-op opcode #(try-parse-op $1 matchers prefixgen)))
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(fn is-addr? [param] (= (type param) :string))
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(fn addr [param] (when (is-addr? param) {:addr param}))
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(fn rel-addr [param] (when (is-addr? param) {:rel8 param}))
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(fn num [param] (when (= (type param) :number) {:num param}))
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(fn imm16 [param] (when (= (type param) :number) {:imm16 param}))
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(fn imm8 [param] (when (= (type param) :number) {:imm8 param}))
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(fn table-matcher [tbl key]
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(fn table-matcher [tbl key]
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(let [lookup (collect [i val (ipairs tbl)] val (- i 1))]
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(let [lookup (collect [i val (ipairs tbl)] val (- i 1))]
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(fn [param] (case (. lookup param) octet {key octet}))))
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(fn [param] (case (. lookup param) octet {key octet}))))
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@ -55,6 +48,18 @@
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#(when (argmatch [:hl] $1) {:reg 6})))
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#(when (argmatch [:hl] $1) {:reg 6})))
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(local rp (table-matcher [:bc :de :hl :sp] :rp))
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(local rp (table-matcher [:bc :de :hl :sp] :rp))
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(local rp2 (table-matcher [:bc :de :hl :af] :rp))
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(local rp2 (table-matcher [:bc :de :hl :af] :rp))
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(fn is-addr? [param] (and (= (type param) :string)
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(not= param :ix) (not= param :iy)
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(= (reg param) nil) (= (rp param) nil) (= (rp2 param) nil)))
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(fn is-computed? [param] (= (type param) :function))
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(fn is-number? [param] (= (type param) :number))
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(fn rel-addr [param] (when (is-addr? param) {:rel8 param}))
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(fn num [param] (when (or (is-number? param) (is-computed? param)) {:num param}))
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(fn imm16 [param] (when (or (is-number? param) (is-computed? param) (is-addr? param)) {:imm16 param}))
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(fn imm8 [param] (when (or (is-number? param) (is-computed? param)) {:imm8 param}))
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(local addr imm16)
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(fn im [arg] (match arg
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(fn im [arg] (match arg
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0 {:im 0}
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0 {:im 0}
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1 {:im 2}
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1 {:im 2}
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@ -167,7 +172,7 @@
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; ED prefix
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; ED prefix
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(opform :in [reg [:c]] #(when (not= $1.reg 6) (.. "\xed" (xyz 1 $1.reg 0))))
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(opform :in [reg [:c]] #(when (not= $1.reg 6) (.. "\xed" (xyz 1 $1.reg 0))))
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(opform :in [[:c]] #(.. "\xed" (xyz 1 6 0)))
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(opform :in [[:c]] #(.. "\xed" (xyz 1 6 0)))
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(opform :out [reg [:c]] #(when (not= $1.reg 6) (.. "\xed" (xyz 1 $1.reg 1))))
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(opform :out [[:c] reg] #(when (not= $1.reg 6) (.. "\xed" (xyz 1 $1.reg 1))))
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(opform :out [[:c]] #(.. "\xed" (xyz 1 6 1)))
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(opform :out [[:c]] #(.. "\xed" (xyz 1 6 1)))
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(opform :sbc [:hl rp] #(.. "\xed" (xpqz 1 $1.rp 0 2)))
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(opform :sbc [:hl rp] #(.. "\xed" (xpqz 1 $1.rp 0 2)))
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(opform :adc [:hl rp] #(.. "\xed" (xpqz 1 $1.rp 1 2)))
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(opform :adc [:hl rp] #(.. "\xed" (xpqz 1 $1.rp 1 2)))
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@ -222,19 +227,23 @@
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(fn op-pdat.size [op env]
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(fn op-pdat.size [op env]
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(+ (length op.prefix)
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(+ (length op.prefix)
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(case op
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(case op
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{: addr} 2
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{: rel8} 1
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{: rel8} 1
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{: imm16} 2
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{: imm16} 2
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{: imm8} 1
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{: imm8} 1
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_ 0)))
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_ 0)))
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(fn decode-number [param env]
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(case (type param)
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:number param
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:string (env:lookup-addr param)
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:function (param (setmetatable {} {:__index #(env:lookup-addr $2)}) env)))
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(fn op-pdat.bytes [op env]
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(fn op-pdat.bytes [op env]
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(.. op.prefix
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(.. op.prefix
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(case op
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(case op
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{: addr} (int16-to-bytes (env:lookup-addr addr))
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{: rel8} (int8-to-bytes (- (env:lookup-addr rel8) (+ op.addr 2)))
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{: rel8} (int8-to-bytes (- (env:lookup-addr rel8) op.addr))
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{: imm16} (int16-to-bytes (decode-number imm16 env))
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{: imm16} (int16-to-bytes imm16)
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{: imm8} (int8-to-bytes (decode-number imm8 env))
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{: imm8} (int8-to-bytes imm8)
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_ "")))
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_ "")))
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{: opcodes : parse-op : op-pdat : try-parse-op}
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{: opcodes : parse-op : op-pdat : try-parse-op}
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