533 lines
14 KiB
Tal
533 lines
14 KiB
Tal
( math32.tal )
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( )
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( 32-bit integers are represented by two 16-bit integers )
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( x** means xhi* xlo* )
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%DEBUG { #ff #0e DEO }
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%RTN { JMP2r }
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%EMIT { .Console/write DEO }
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%DIGIT { #00 SWP ;digits ADD2 LDA EMIT }
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%SPACE { #20 EMIT }
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%NEWLINE { #0a EMIT }
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%TOR { ROT ROT } ( a b c -> c a b )
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%TOR2 { ROT2 ROT2 }
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%POP4 { POP2 POP2 }
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%COMPLEMENT32 { SWP2 #ffff EOR2 SWP2 #ffff EOR2 }
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%RESET-POS { #0000 ;pos STA2 #00 ;buf STA }
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%EMIT-BYTE { DUP #04 SFT DIGIT #0f AND DIGIT }
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( devices )
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|10 @Console [ &vector $2 &read $1 &pad $5 &write $1 ]
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( program )
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|0100
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( #1234 #5678 ;emit-long JSR2 NEWLINE
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#0000 #0009 #0000 #0003 ;div32 JSR2 ;emit-long JSR2 NEWLINE )
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;test-interact .Console/vector DEO2 BRK
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( bitcount: number of bits needed to represent number )
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( equivalent to floor[log2[x]] + 1 )
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@bitcount8 ( x^ -> n^ )
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#00 SWP ( n x )
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&loop
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DUP #00 EQU ( n x x=0 )
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,&done JCN ( n x )
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#01 SFT ( n x>>1 )
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SWP INC SWP ( n+1 x>>1 )
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,&loop JMP
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&done
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POP ( n )
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RTN
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@bitcount16 ( x* -> n^ )
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SWP ( xlo xhi )
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;bitcount8 JSR2 ( xlo nhi )
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DUP #00 NEQ ( xlo nhi nhi!=0 )
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,&hi-set JCN ( xlo nhi )
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SWP ;bitcount8 JSR2 ADD ( nhi+nlo )
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RTN
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&hi-set
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SWP POP #08 ADD ( nhi+8 )
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RTN
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@bitcount32 ( x** -> n^ )
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SWP2 ( xlo* xhi* )
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;bitcount16 JSR2 ( xlo* nhi )
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DUP #00 NEQ ( xlo* nhi nhi!=0 )
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,&hi-set JCN ( xlo* nhi )
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TOR ;bitcount16 JSR2 ADD RTN ( nhi+nlo )
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&hi-set
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TOR POP2 #10 ADD ( nhi+16 )
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RTN
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( equality )
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@eq32 ( xhi* xlo* yhi* ylo* -> bool^ )
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ROT2 EQU2 #00 TOR2
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EQU2 SWP POP AND
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RTN
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@is-zero32 ( x** -> bool^ )
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ORA2 #0000 EQU2
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RTN
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@ne32 ( xhi* xlo* yhi* ylo* -> bool^ )
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ROT2 NEQ2 #00 TOR2
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NEQ2 SWP POP ORA
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RTN
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@non-zero32 ( x** -> bool^ )
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ORA2 #0000 NEQ2
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RTN
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( comparisons )
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( x < y )
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@lt32 ( x** y** -> bool^ )
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ROT2 SWP2 ( xhi yhi xlo ylo )
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LTH2 ,<-lo JCN ( xhi yhi )
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LTH2 RTN
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<-lo
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GTH2 #00 EQU RTN
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( x <= y )
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@lteq32 ( x** y** -> bool^ )
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ROT2 SWP2 ( xhi yhi xlo ylo )
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GTH2 ,>-lo JCN ( xhi yhi )
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GTH2 #00 EQU RTN
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>-lo
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LTH2 RTN
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( x > y )
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@gt32 ( x** y** -> bool^ )
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ROT2 SWP2 ( xhi yhi xlo ylo )
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GTH2 ,>-lo JCN ( xhi yhi )
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GTH2 RTN
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>-lo
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LTH2 #00 EQU RTN
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( x > y )
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@gteq32 ( x** y** -> bool^ )
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ROT2 SWP2 ( xhi yhi xlo ylo )
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LTH2 ,<-lo JCN ( xhi yhi )
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LTH2 #00 EQU RTN
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<-lo
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GTH2 RTN
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( bitwise operations )
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@and32 ( xhi* xlo* yhi* ylo* -> xhi|yhi* xlo|ylo* )
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ROT2 AND2 TOR2 AND2 SWP2
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RTN
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@or32 ( xhi* xlo* yhi* ylo* -> xhi|yhi* xlo|ylo* )
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ROT2 ORA2 TOR2 ORA2 SWP2
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RTN
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@xor32 ( xhi* xlo* yhi* ylo* -> xhi|yhi* xlo|ylo* )
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ROT2 EOR2 TOR2 EOR2 SWP2
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RTN
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@complement32 ( x** -> ~x** )
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COMPLEMENT32
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RTN
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( bit shifting )
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@right-shift ( x** n^ -> x<<n )
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DUP #08 LTH ;right-shift0 JCN2 ( x n )
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DUP #10 LTH ;right-shift1 JCN2 ( x n )
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DUP #18 LTH ;right-shift2 JCN2 ( x n )
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;right-shift3 JMP2 ( x n )
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RTN
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( shift right by 0-7 bits )
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@right-shift0 ( x** n^ -> x<<n )
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#0000 ,&z0 STR2 #0000 ,&z2 STR2
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,&r STR ( n -> r )
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,&r LDR SFT ,&z3 STR ( write z3 )
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#00 ,&r LDR SFT2 ,&z2 LDR2 ORA2 ,&z2 STR2 ( write z2,z3 )
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#00 ,&r LDR SFT2 ,&z1 LDR2 ORA2 ,&z1 STR2 ( write z1,z2 )
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#00 ,&r LDR SFT2 ,&z0 LDR2 ORA2 ,&z0 STR2 ( write z0,z1 )
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,&z0 LDR2 ,&z2 LDR2
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RTN
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[ &r $1 &z0 $1 &z1 $1 &z2 $1 &z3 $1 ]
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( shift right by 8-15 bits )
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@right-shift1 ( x** n^ -> x<<n )
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#00 ,&z1 STR #0000 ,&z2 STR2
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#08 SUB ,&r STR ( n -> r )
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POP
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,&r LDR SFT ,&z3 STR ( write z3 )
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#00 ,&r LDR SFT2 ,&z2 LDR2 ORA2 ,&z2 STR2 ( write z2,z3 )
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#00 ,&r LDR SFT2 ,&z1 LDR2 ORA2 ,&z1 STR2 ( write z1,z2 )
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#00 ,&z1 LDR ,&z2 LDR2
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RTN
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[ &r $1 &z1 $1 &z2 $1 &z3 $1 ]
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( shift right by 16-23 bits )
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@right-shift2 ( x** n^ -> x<<n )
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#0000 ,&z2 STR2
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#10 SUB ,&r STR ( n -> r )
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POP2
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,&r LDR SFT ,&z3 STR ( write z3 )
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#00 ,&r LDR SFT2 ,&z2 LDR2 ORA2 ,&z2 STR2 ( write z2,z3 )
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#0000 ,&z2 LDR2
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RTN
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[ &r $1 &z2 $1 &z3 $1 ]
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( shift right by 16-23 bits )
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@right-shift3 ( x** n^ -> x<<n )
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#18 SUB ,&r STR ( n -> r )
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POP2 POP #00 SWP #0000 SWP2 ( 00 00 00 x0 )
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,&r LDR SFT
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RTN
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[ &r $1 ]
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@left-shift ( x** n^ -> x<<n )
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DUP #08 LTH ;left-shift0 JCN2 ( x n )
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DUP #10 LTH ;left-shift1 JCN2 ( x n )
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DUP #18 LTH ;left-shift2 JCN2 ( x n )
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;left-shift3 JMP2 ( x n )
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RTN
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( shift left by 0-7 bits )
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@left-shift0 ( x** n^ -> x<<n )
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#0000 ,&z0 STR2 #0000 ,&z2 STR2
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#40 SFT ,&r STR ( n<<4 -> r )
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SWP SWP2 SWP ( x3 x2 x1 x0 )
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,&r LDR SFT ,&z0 STR ( x3 x2 x1 )
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#00 SWP ,&r LDR SFT2 ( x3 x2 00x1<<r )
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,&z0 LDR2 ORA2 ,&z0 STR2 ( x3 x2 )
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#00 SWP ,&r LDR SFT2 ( x3 00x2<<r )
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,&z1 LDR2 ORA2 ,&z1 STR2 ( x3 )
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#00 SWP ,&r LDR SFT2 ( 00x3<<r )
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,&z2 LDR2 ORA2 ,&z2 STR2 ( )
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,&z0 LDR2 ,&z2 LDR2
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RTN
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[ &r $1 &z0 $1 &z1 $1 &z2 $2 ]
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( shift left by 8-15 bits )
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@left-shift1 ( x** n^ -> x<<n )
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#0000 ,&z0 STR2 #00 ,&z2 STR
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#08 SUB #40 SFT ,&r STR ( n<<4 -> r )
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SWP SWP2 SWP POP ( x3 x2 x1 )
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,&r LDR SFT ,&z0 STR ( x3 x2 )
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#00 SWP ,&r LDR SFT2 ( x3 00x2<<r )
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,&z0 LDR2 ORA2 ,&z0 STR2 ( x3 )
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#00 SWP ,&r LDR SFT2 ( 00x3<<r )
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,&z1 LDR2 ORA2 ,&z1 STR2 ( )
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,&z0 LDR2 ,&z2 LDR #00
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RTN
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[ &r $1 &z0 $1 &z1 $1 &z2 $1 ]
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( shift left by 16-23 bits )
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@left-shift2 ( x** n^ -> x<<n )
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#0000 ,&z0 STR2
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#10 SUB #40 SFT ,&r STR ( n<<4 -> r )
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SWP2 POP2 SWP ( x3 x2 )
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,&r LDR SFT ,&z0 STR ( x3 )
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#00 SWP ,&r LDR SFT2 ( x3<<r )
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,&z0 LDR2 ORA2 ,&z0 STR2 ( )
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,&z0 LDR2 #0000
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RTN
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[ &r $1 &z0 $2 ]
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( shift left by 24-31 bits )
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@left-shift3 ( x** n^ -> x<<n )
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#18 SUB #10 MUL ( x0 x1 x2 x3 r=[n-24]<<4 )
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SFT ( x0 x1 x2 x3<<r )
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SWP2 POP2 SWP POP #0000 #00
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RTN
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( arithmetic )
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@add32 ( xhi* xlo* yhi* ylo* -> zhi* zlo* )
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,&y2 STR2 ,&y0 STR2 ( save ylo, yhi )
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,&x2 STR2 ,&x0 STR2 ( save xlo, xhi )
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#0000 #0000 ,&z0 STR2 ,&z2 STR2 ( reset zhi, zlo )
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( x3 + y3 => z2z3 )
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#00 ,&x3 LDR #00 ,&y3 LDR ADD2 ,&z2 STR2
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( x2 + y2 + z2 => z1z2 )
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#00 ,&x2 LDR ,&z1 LDR2 ADD2 ,&z1 STR2
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#00 ,&y2 LDR ,&z1 LDR2 ADD2 ,&z1 STR2
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( x1 + y1 + z1 => z0z1 )
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#00 ,&x1 LDR ,&z0 LDR2 ADD2 ,&z0 STR2
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#00 ,&y1 LDR ,&z0 LDR2 ADD2 ,&z0 STR2
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( x0 + y0 + z0 => z0 )
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,&x0 LDR ,&z0 LDR ADD ,&z0 STR
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,&y0 LDR ,&z0 LDR ADD ,&z0 STR
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( load zhi,zlo )
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,&z0 LDR2 ,&z2 LDR2
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RTN
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( registers for add32 )
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[ &x0 $1 &x1 $1 &x2 $1 &x3 $1 ]
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[ &y0 $1 &y1 $1 &y2 $1 &y3 $1 ]
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[ &z0 $1 &z1 $1 &z2 $2 ]
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@negate32 ( x** -> -x** )
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COMPLEMENT32
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INC2 ( ~xhi -xlo )
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DUP2 #0000 NEQ2 ( ~xhi -xlo non-zero? )
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,&done JCN ( xlo non-zero => don't inc hi )
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SWP2 INC2 SWP2 ( -xhi -xlo )
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&done
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RTN
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@sub32 ( x** y** -> z** )
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;negate32 JSR2 ;add32 JSR2
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RTN
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@mul16 ( x* y* -> z** )
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,&y1 STR ,&y0 STR ( save ylo, yhi )
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,&x1 STR ,&x0 STR ( save xlo, xhi )
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#0000 #00 ,&z0 STR2 ,&z2 STR ( reset z0,z1,z2 )
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#0000 #00 ,&a0 STR2 ,&a2 STR ( reset a0,a1,a2 )
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( x1 * y1 => z1z2 )
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#00 ,&x1 LDR #00 ,&y1 LDR MUL2 ,&z1 STR2
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( x0 * y1 => z0z1 )
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#00 ,&x0 LDR #00 ,&y1 LDR MUL2 ,&z0 LDR2 ADD2 ,&z0 STR2
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( x1 * y0 => a1a2 )
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#00 ,&x1 LDR #00 ,&y0 LDR MUL2 ,&a1 STR2
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( x0 * y0 => a0a1 )
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#00 ,&x0 LDR #00 ,&y0 LDR MUL2 ,&a0 LDR2 ADD2 ,&a0 STR2
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( add z and a<<8 )
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#00 ,&z0 LDR2 ,&z2 LDR
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,&a0 LDR2 ,&a2 LDR #00
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;add32 JSR2
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RTN
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[ &x0 $1 &x1 $1 ]
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[ &y0 $1 &y1 $1 ]
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[ &z0 $1 &z1 $1 &z2 $1 ]
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[ &a0 $1 &a1 $1 &a2 $1 ]
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@mul32 ( x** y** -> z** )
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,&y1 STR2 ,&y0 STR2 ( save ylo, yhi )
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,&x1 STR2 ,&x0 STR2 ( save xlo, xhi )
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,&y1 LDR2 ,&x1 LDR2 ;mul16 JSR2 ( [x1*y1] )
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,&z1 STR2 ,&z0 STR2 ( sum = x1*y1, save zlo, zhi )
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,&y1 LDR2 ,&x0 LDR2 MUL2 ( [x0*y1]<<16 )
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,&y0 LDR2 ,&x1 LDR2 MUL2 ( [x1*y0]<<16 )
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( [x0*y0]<<32 will completely overflow )
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ADD2 ,&z0 LDR2 ADD2 ( sum += x0*y1<<16 + x1*y0<<16 )
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,&z1 LDR2
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RTN
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[ &x0 $2 &x1 $2 ]
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[ &y0 $2 &y1 $2 ]
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[ &z0 $2 &z1 $2 ]
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@div32 ( x** y** -> q** )
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( store y and x for repeated use )
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;div32/div1 STA2 ;div32/div0 STA2 ( y -> div )
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;div32/rem1 STA2 ;div32/rem0 STA2 ( x -> rem )
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( if x < y then the answer is 0 )
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;div32/rem0 LDA2 ;div32/rem1 LDA2
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;div32/div0 LDA2 ;div32/div1 LDA2
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;lt32 JSR2 ,&is-zero JCN ,¬-zero JMP
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&is-zero
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#0000 #0000 RTN
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( x >= y so the answer is >= 1 )
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¬-zero
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#0000 ;div32/quo0 STA2 #0000 ;div32/quo1 STA2 ( 0 -> quo )
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( bitcount[x] - bitcount[y] determines the largest multiple of y to try )
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;div32/rem0 LDA2 ;div32/rem1 LDA2 ;bitcount32 JSR2 ( rbits^ )
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;div32/div0 LDA2 ;div32/div1 LDA2 ;bitcount32 JSR2 ( rbits^ dbits^ )
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SUB ( shift=rbits-dits )
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#00 DUP2 ( shift 0 shift 0 )
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( 1<<shift -> cur )
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#0000 #0001 ROT2 POP
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;left-shift JSR2 ;div32/cur1 STA2 ;div32/cur0 STA2
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( div<<shift -> div )
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;div32/div0 LDA2 ;div32/div1 LDA2 ROT2 POP
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;left-shift JSR2 ;div32/div1 STA2 ;div32/div0 STA2
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&loop
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( if rem >= the current divisor, we can subtract it and add to quotient )
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,&rem0 LDR2 ,&rem1 LDR2 ,&div0 LDR2 ,&div1 LDR2 ;lt32 JSR2 ( rem<div? )
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,&rem-lt JCN ( if rem < div skip this iteration )
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( if rem >= div, then we have found a multiple of y that divides x )
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,&rem0 LDR2 ,&rem1 LDR2 ,&div0 LDR2 ,&div1 LDR2 ;sub32 JSR2 ,&rem1 STR2 ,&rem0 STR2 ( rem -= div )
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,&quo0 LDR2 ,&quo1 LDR2 ,&cur0 LDR2 ,&cur1 LDR2 ;add32 JSR2 ,&quo1 STR2 ,&quo0 STR2 ( quo += cur )
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&rem-lt
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,&div0 LDR2 ,&div1 LDR2 #01 ;right-shift JSR2 ,&div1 STR2 ,&div0 STR2 ( div >>= 1 )
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,&cur0 LDR2 ,&cur1 LDR2 #01 ;right-shift JSR2 ,&cur1 STR2 ,&cur0 STR2 ( cur >>= 1 )
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,&cur0 LDR2 ,&cur1 LDR2 ;non-zero32 JSR2 ,&loop JCN ( if cur>0, loop. else we're done )
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,&quo0 LDR2 ,&quo1 LDR2 ( TODO: consider making this divmod32 )
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RTN
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[ &div0 $2 &div1 $2
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&rem0 $2 &rem1 $2
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&quo0 $2 &quo1 $2
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&cur0 $2 &cur1 $2 ]
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( testing )
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( parses hex representation e.g. #31 #33 -> #13 )
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@parse-byte ( c0 c1 -> x^ )
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( lower char )
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DUP #3a LTH ,&lo-digit JCN
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#57 ,&lo JMP &lo-digit #30
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&lo SUB SWP
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( higher char ))
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DUP #3a LTH ,&hi-digit JCN
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#57 ,&hi JMP &hi-digit #30
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&hi SUB #40 SFT ORA
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RTN
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@buf $24 ( buffer used by test-interact )
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@pos $2 ( position in buffer used by test-interact )
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( save character input and execute tests on \n )
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( tests always start with a single character and a space )
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( then additional arguments are passed. )
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@test-interact
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.Console/read DEI ( char^ )
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DUP #0a EQU ( char^ char=\n? )
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,&exec JCN ( char^ )
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;pos LDA2 ;buf ADD2 STA
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;pos LDA2k INC2 SWP2 STA2 BRK
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&exec
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POP ( )
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;buf LDA LIT '+ EQU ;test-add32 JCN2
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;buf LDA LIT '* EQU ;test-mul32 JCN2
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;buf LDA LIT '- EQU ;test-sub32 JCN2
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;buf LDA LIT '/ EQU ;test-div32 JCN2
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;buf LDA LIT 'L EQU ;test-left-shift JCN2
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;buf LDA LIT 'R EQU ;test-right-shift JCN2
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;buf LDA LIT 'B EQU ;test-bitcount32 JCN2
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;buf LDA LIT '& EQU ;test-and32 JCN2
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;buf LDA LIT '| EQU ;test-or32 JCN2
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;buf LDA LIT '^ EQU ;test-xor32 JCN2
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;buf LDA LIT '~ EQU ;test-complement32 JCN2
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;buf LDA LIT 'N EQU ;test-negate32 JCN2
|
|
;buf LDA LIT '= EQU ;test-eq32 JCN2
|
|
;buf LDA LIT '! EQU ;test-ne32 JCN2
|
|
;buf LDA LIT '0 EQU ;test-is-zero32 JCN2
|
|
;buf LDA LIT 'Z EQU ;test-non-zero32 JCN2
|
|
;buf LDA LIT '< EQU ;test-lt32 JCN2
|
|
;buf LDA LIT '> EQU ;test-gt32 JCN2
|
|
;buf LDA LIT '{ EQU ;test-lteq32 JCN2
|
|
;buf LDA LIT '} EQU ;test-gteq32 JCN2
|
|
LIT '? EMIT NEWLINE RESET-POS BRK
|
|
|
|
@read-byte ( addr* -> x^ )
|
|
LDA2 ;parse-byte JSR2
|
|
RTN
|
|
|
|
@read-long ( addr* -> x** )
|
|
DUP2 ,&loc STR2 LDA2 ;parse-byte JSR2
|
|
,&loc LDR2 #0002 ADD2 LDA2 ;parse-byte JSR2
|
|
,&loc LDR2 #0004 ADD2 LDA2 ;parse-byte JSR2
|
|
,&loc LDR2 #0006 ADD2 LDA2 ;parse-byte JSR2
|
|
RTN
|
|
[ &loc $2 ]
|
|
|
|
( format: ". xxxxxxxx" -> "zzzzzzzz" )
|
|
@unary-32-test
|
|
;buf #0002 ADD2 ;read-long JSR2
|
|
ROT2 JSR2 ;emit-long JSR2
|
|
NEWLINE RESET-POS BRK
|
|
|
|
( format: ". xxxxxxxx" -> "zz" )
|
|
@unary-32-8-test
|
|
;buf #0002 ADD2 ;read-long JSR2
|
|
ROT2 JSR2 ;emit-byte JSR2
|
|
NEWLINE RESET-POS BRK
|
|
|
|
( format: ". xxxxxxxx yyyyyyyy" -> "zzzzzzzz" )
|
|
@binary-32-test
|
|
;buf #0002 ADD2 ;read-long JSR2
|
|
ROT2
|
|
;buf #000b ADD2 ;read-long JSR2
|
|
ROT2 JSR2 ;emit-long JSR2
|
|
NEWLINE RESET-POS BRK
|
|
|
|
( format: ". xxxxxxxx yy" -> "zzzzzzzz" )
|
|
@binary-32-8-32-test
|
|
;buf #0002 ADD2 ;read-long JSR2
|
|
ROT2
|
|
;buf #000b ADD2 ;read-byte JSR2
|
|
TOR JSR2 ;emit-long JSR2
|
|
NEWLINE RESET-POS BRK
|
|
|
|
( format: ". xxxxxxxx yyyyyyyy" -> "zz" )
|
|
@binary-32-32-8-test
|
|
;buf #0002 ADD2 ;read-long JSR2
|
|
ROT2
|
|
;buf #000b ADD2 ;read-long JSR2
|
|
ROT2 JSR2 ;emit-byte JSR2
|
|
NEWLINE RESET-POS BRK
|
|
|
|
( different test executors )
|
|
@test-add32 ;add32 ;binary-32-test JMP2
|
|
@test-mul32 ;mul32 ;binary-32-test JMP2
|
|
@test-sub32 ;sub32 ;binary-32-test JMP2
|
|
@test-div32 ;div32 ;binary-32-test JMP2
|
|
@test-left-shift ;left-shift ;binary-32-8-32-test JMP2
|
|
@test-right-shift ;right-shift ;binary-32-8-32-test JMP2
|
|
@test-bitcount32 ;bitcount32 ;unary-32-8-test JMP2
|
|
@test-and32 ;and32 ;binary-32-test JMP2
|
|
@test-or32 ;or32 ;binary-32-test JMP2
|
|
@test-xor32 ;xor32 ;binary-32-test JMP2
|
|
@test-complement32 ;complement32 ;unary-32-test JMP2
|
|
@test-negate32 ;negate32 ;unary-32-test JMP2
|
|
@test-eq32 ;eq32 ;binary-32-32-8-test JMP2
|
|
@test-ne32 ;ne32 ;binary-32-32-8-test JMP2
|
|
@test-is-zero32 ;is-zero32 ;unary-32-8-test JMP2
|
|
@test-non-zero32 ;non-zero32 ;unary-32-8-test JMP2
|
|
@test-lt32 ;lt32 ;binary-32-32-8-test JMP2
|
|
@test-lteq32 ;lteq32 ;binary-32-32-8-test JMP2
|
|
@test-gt32 ;gt32 ;binary-32-32-8-test JMP2
|
|
@test-gteq32 ;gteq32 ;binary-32-32-8-test JMP2
|
|
|
|
@emit-long ( hi* lo* -> )
|
|
SWP2
|
|
SWP EMIT-BYTE EMIT-BYTE
|
|
SWP EMIT-BYTE EMIT-BYTE
|
|
RTN
|
|
|
|
( @emit-short ( x* -> )
|
|
( SWP EMIT-BYTE EMIT-BYTE
|
|
RTN )
|
|
|
|
@emit-byte ( x^ -> )
|
|
EMIT-BYTE
|
|
RTN
|
|
|
|
( convenience for less branching when printing hex )
|
|
@digits
|
|
30 31 32 33 34 35 36 37
|
|
38 39 61 62 63 64 65 66
|