71 lines
1.8 KiB
Plaintext
Executable file
71 lines
1.8 KiB
Plaintext
Executable file
array ops 2 allot
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array optypes 2 allot
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var currop
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: op1 ops @ ;
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: op2 ops 1 + @ ;
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0 const OP_NONE
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1 const OP_REG8
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2 const OP_REG16
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3 const OP_SREG
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4 const OP_IMM
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: op! ( op type ) currop @ >r optypes r@ + ! ops r@ + ! 1 r> + currop ! ;
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: assembled 0 currop ! ;
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: mkreg makedo , does> @ swap makedo , , does> dup @ swap 1 + @ op! ;
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OP_REG8 mkreg reg8
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OP_REG16 mkreg reg16
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OP_SREG mkreg sreg
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0 reg16 ax 0 reg8 al 4 reg8 ah
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1 reg16 cx 1 reg8 cl 5 reg8 ch
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2 reg16 dx 2 reg8 dl 6 reg8 dh
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3 reg16 bx 3 reg8 bl 7 reg8 bh
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4 reg16 sp 5 reg16 bp 6 reg16 si 7 reg16 di
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0 sreg es 1 sreg cs 2 sreg ss 3 sreg ds
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: # OP_IMM op! ;
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: read-impl ( p -- next cp optypes )
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dup @ swap
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dup 1 + @ swap
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2 + ;
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: match-impl ( optypes opcount -- b )
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begin dup 0 > while
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1 - 2dup + @ over optypes + @ !=
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if drop drop 0 ret then
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repeat drop drop 1 ;
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: inst ( opcount -- ) makedo , 0 , does>
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dup @ currop @ != if 0 message yelp ret then
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1 + @ begin dup while
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read-impl currop @ match-impl
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if execute drop assembled ret else drop then
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repeat drop 1 message yelp ;
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: inst-nextimpl do.data 1 + ;
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: inst-opcount do.data @ ;
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: impl ( [optype...] cp cpinst -- )
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here >r >r ( r: impl inst )
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r@ inst-nextimpl @ , ,
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r@ inst-opcount begin dup while 1 - swap , repeat drop
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r> inst-nextimpl r> swap ! ;
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: int &hcd outb! outb! assembled ;
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2 inst mov
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2 inst movb
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OP_IMM OP_REG16 :noname &hb8 op1 + outb! op2 outw! ; ' mov impl
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OP_IMM OP_REG8 :noname &hb0 op1 + outb! op2 outb! ; ' movb impl
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1 inst push
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OP_SREG :noname &h06 op1 8 * + outb! ; ' push impl
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OP_REG16 :noname &h50 op1 + outb! ; ' push impl
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1 inst pop
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OP_SREG :noname &h07 op1 8 * + outb! ; ' pop impl
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OP_REG16 :noname &h58 op1 + outb! ; ' pop impl
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