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use STH for left-shift0

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~d6 2021-12-28 15:26:03 -05:00
parent 28bcf6d413
commit c34be54fbc
1 changed files with 5 additions and 5 deletions
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math32.tal
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@ -172,18 +172,18 @@
( shift left by 0-7 bits )
@left-shift0 ( x** n^ -> x<<n )
#0000 ;sh/z0 STA2 #0000 ;sh/z2 STA2
#40 SFT ;sh/r STA ( n<<4 -> r )
#40 SFT STH ( n<<4 -> r )
SWP SWP2 SWP ( x3 x2 x1 x0 )
;sh/r LDA SFT ;sh/z0 STA ( x3 x2 x1 )
STHkr SFT ;sh/z0 STA ( x3 x2 x1 )
#00 SWP ;sh/r LDA SFT2 ( x3 x2 00x1<<r )
#00 SWP STHkr SFT2 ( x3 x2 00x1<<r )
;sh/z0 LDA2 ORA2 ;sh/z0 STA2 ( x3 x2 )
#00 SWP ;sh/r LDA SFT2 ( x3 00x2<<r )
#00 SWP STHkr SFT2 ( x3 00x2<<r )
;sh/z1 LDA2 ORA2 ;sh/z1 STA2 ( x3 )
#00 SWP ;sh/r LDA SFT2 ( 00x3<<r )
#00 SWP STHr SFT2 ( 00x3<<r )
;sh/z2 LDA2 ORA2 ;sh/z2 STA2 ( )
;sh/z0 LDA2 ;sh/z2 LDA2