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Use addr statement in calculator.asm

This commit is contained in:
Juhani Krekelä 2022-08-09 00:44:14 +03:00
parent 117a2e24c2
commit 34c3fa70e3
1 changed files with 11 additions and 26 deletions
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37
calculator.asm
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@ -1,8 +1,6 @@
org 0 org 0
start: start:
cleq r0, r0, initStack
load r0, lit01 load r0, lit01
load r1, litff load r1, litff
cleq r0, r0, pushWord cleq r0, r0, pushWord
@ -143,17 +141,17 @@ popWord:
; trashes: ; trashes:
; r0, r1, r2, r3 ; r0, r1, r2, r3
pushByte: pushByte:
load r2, SPHigh load r2, SP+0
store storeByteHigh, r2 store storeByteHigh, r2
load r3, SPLow load r3, SP+1
store storeByteLow, r3 store storeByteLow, r3
cleq r0, r0, storeByte cleq r0, r0, storeByte
load r0, SPHigh load r0, SP+0
load r1, SPLow load r1, SP+1
cleq r0, r0, incWord cleq r0, r0, incWord
store SPHigh, r0 store SP+0, r0
store SPLow, r1 store SP+1, r1
ret ret
@ -162,11 +160,11 @@ pushByte:
; trashes: ; trashes:
; r1, r2, r3 ; r1, r2, r3
popByte: popByte:
load r0, SPHigh load r0, SP+0
load r1, SPLow load r1, SP+1
cleq r0, r0, decWord cleq r0, r0, decWord
store SPHigh, r0 store SP+0, r0
store SPLow, r1 store SP+1, r1
store loadByteHigh, r0 store loadByteHigh, r0
store loadByteLow, r1 store loadByteLow, r1
@ -695,18 +693,5 @@ litff: data ff
; Stack ; Stack
; ================================================================== ; ==================================================================
SPHigh: data 0 SP: addr stackBase
SPLow: data 0
; trashes:
; r3
initStack:
load r3, initStackDummyLoad+1
store SPHigh, r3
load r3, initStackDummyLoad+2
store SPLow, r3
ret
initStackDummyLoad: load r0, stackBase
stackBase: stackBase: