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Fully implement stack-based memory manipulation in calculator.asm

This commit is contained in:
Juhani Krekelä 2022-08-18 14:37:12 +03:00
parent 5cfae260fd
commit 3583fc8379
1 changed files with 48 additions and 1 deletions
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49
calculator.asm
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@ -247,7 +247,7 @@ stSwap:
; Memory
; ------------------------------------------------------------------
; a p --
; b ptr --
stStoreByte:
cleq r0, r0, popWord
store storeByteHigh, r0
@ -257,6 +257,53 @@ stStoreByte:
or r0, r1
breq r0, r0, storeByte
; ptr -- b
stLoadByte:
cleq r0, r0, popWord
store loadByteHigh, r0
store loadByteLow, r1
cleq r0, r0, loadByte
xor r1, r1
or r1, r0
xor r0, r0
breq r0, r0, pushWord
; n ptr --
stStoreWord:
cleq r0, r0, popWord
cleq r0, r0, tmpStoreWord01
store storeByteHigh, r0
store storeByteLow, r1
cleq r0, r0, peekWord
cleq r0, r0, storeByte
cleq r0, r0, tmpLoadWord01
cleq r0, r0, incWord
store storeByteHigh, r0
store storeByteLow, r1
cleq r0, r0, popWord
xor r0, r0
or r0, r1
breq r0, r0, storeByte
; ptr -- n
stLoadWord:
cleq r0, r0, peekWord
store loadByteHigh, r0
store loadByteLow, r1
cleq r0, r0, loadByte
cleq r0, r0, tmpStoreWord01
cleq r0, r0, popWord
cleq r0, r0, incWord
store loadByteHigh, r0
store loadByteLow, r1
cleq r0, r0, loadByte
xor r2, r2
or r2, r0
cleq r0, r0, tmpLoadWord01
xor r1, r1
or r1, r2
breq r0, r0, pushWord
; ==================================================================
; Low-level functions
; ==================================================================