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<h1> words/itype.asm </h1> |
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<pre> |
; ( addr n -- ) Tools |
; R( -- ) |
; reads packed string from flash and emit it |
VE_ITYPE: |
.db $05, "itype" |
.dw VE_HEAD |
.set VE_HEAD = VE_ITYPE |
XT_ITYPE: |
.dw DO_COLON |
PFA_ITYPE: |
.dw XT_DUP |
.dw XT_EQUALZERO |
; IF |
.dw XT_DOCONDBRANCH |
.dw PFA_ITYPE1 |
.dw XT_DROP |
.dw XT_DROP |
.dw XT_EXIT |
; THEN |
|
PFA_ITYPE1: |
.dw XT_DUP |
.dw XT_DOLITERAL |
.dw $0001 |
.dw XT_EQUAL |
; IF |
.dw XT_DOCONDBRANCH |
.dw PFA_ITYPE2 |
.dw XT_DROP |
.dw XT_IFETCH |
.dw XT_HIEMIT |
.dw XT_EXIT |
; THEN |
|
PFA_ITYPE2: |
.dw XT_OVER |
.dw XT_IFETCH |
.dw XT_HIEMIT |
.dw XT_DUP |
.dw XT_2SLASH |
.dw XT_1MINUS |
.dw XT_TO_R ; >r save k=m-1 |
.dw XT_R_FETCH ; r@ |
.dw XT_GREATERZERO |
; IF |
.dw XT_DOCONDBRANCH |
.dw PFA_ITYPE4 |
.dw XT_SWAP |
.dw XT_R_FETCH ; r@ get k |
.dw XT_ZERO |
; DO |
.dw XT_DODO |
.dw PFA_ITYPE7 |
PFA_ITYPE3: |
.dw XT_1PLUS |
.dw XT_DUP |
.dw XT_IFETCH |
.dw XT_DUP |
.dw XT_LOEMIT |
.dw XT_HIEMIT |
.dw XT_DOLOOP |
.dw PFA_ITYPE3 |
; LOOP |
PFA_ITYPE7: |
.dw XT_SWAP |
; THEN |
|
PFA_ITYPE4: |
.dw XT_SWAP |
.dw XT_1PLUS |
.dw XT_SWAP |
.dw XT_DOLITERAL |
.dw $0001 |
.dw XT_AND |
.dw XT_EQUALZERO |
; IF |
.dw XT_DOCONDBRANCH |
.dw PFA_ITYPE5 |
.dw XT_IFETCH |
.dw XT_LOEMIT |
.dw XT_DOBRANCH |
.dw PFA_ITYPE6 |
; ELSE |
PFA_ITYPE5: |
.dw XT_IFETCH |
.dw XT_DUP |
.dw XT_LOEMIT |
.dw XT_HIEMIT |
; THEN |
PFA_ITYPE6: |
.dw XT_R_FROM ; remove k |
.dw XT_DROP |
.dw XT_EXIT |
|
; ( w -- ) |
; R( -- ) |
; content of cell fetched on stack. |
;VE_LOEMIT: |
; .db $06, "loemit" |
; .dw VE_HEAD |
; .set VE_HEAD = VE_LOEMIT |
XT_LOEMIT: |
.dw DO_COLON |
PFA_LOEMIT: |
.dw XT_DOLITERAL |
.dw $00ff |
.dw XT_AND |
.dw XT_EMIT |
.dw XT_EXIT |
|
|
|
; ( w -- ) |
; R( -- ) |
; content of cell fetched on stack. |
;VE_HIEMIT: |
; .db $06, "hiemit" |
; .dw VE_HEAD |
; .set VE_HEAD = VE_HIEMIT |
XT_HIEMIT: |
.dw DO_COLON |
PFA_HIEMIT: |
.dw XT_DOLITERAL |
.dw 8 |
.dw XT_RSHIFT |
.dw XT_EMIT |
.dw XT_EXIT |
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</pre> |
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