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fdd2bcf847
Two basic problems: (1) cc65, being a one-pass assembler, can't tell if a forward-referenced label is 16-bit or 24-bit. If the operand is potentially ambiguous, such as "LDA label", we need to add an operand width disambiguator. (The existing tests managed to only do backward references.) (2) 64tass wants the labels on JMP/JSR absolute operands to have 24-bit values that match the current program bank. This is the opposite of cc65, which requires 16-bit values. We need to distinguish PBR vs. DBR instructions (i.e. "LDA abs" vs. "JMP abs") and handle them differently when formatting for "Common". Merlin32 doesn't care, and ACME doesn't work at all, so neither of those needed updating. The 20052-branches-and-banks test was expanded to cover the problematic cases.
134 lines
4.1 KiB
ArmAsm
134 lines
4.1 KiB
ArmAsm
; Copyright 2018 faddenSoft. All Rights Reserved.
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; See the LICENSE.txt file for distribution terms (Apache 2.0).
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;
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; Assembler: cc65
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;
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; For the 65816 we want to exercise some additional things.
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.setcpu "65816"
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symlong = $123456
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.org $1000
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clc
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xce
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sep #$30
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jml bank44
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lodat: .byte $00,$01,$02 ;EDIT: set label
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.org $440000
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bank44: cmp f:bank44
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low44: lda bank44
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lda a:bank44 & $ffff
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lda z:bank44 & $ffff ;DP ref, should resolve to "zero"
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bmi low44
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per low44-$40
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bne low44-$40 ;branch to high44
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brl bank44-$40 ;branch to late44
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dat44: ;EDIT: set label
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.addr dat44 ;EDIT: format as 16-bit Address
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.faraddr dat44 ;EDIT: format as 24-bit Address
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.org $44ffc0
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late44: cmp f:late44
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high44: beq cont44 ;EDIT: set label
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bmi late44+$44 ;branch to low44
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brl late44+$44 ;branch to low44
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cont44: jml twok
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.org $2000
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twok: bit twok
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pea dat44 & $ffff ;EDIT: set symbol=dat44
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pea dat44 >> 16 ;EDIT: set symbol=dat44
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bne skip
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jmp [lodat]
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skip: nop
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j1: jsr j2 ;EDIT: set symbol=j2 for all, confirm auto-labels vanish
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j2: jsr j3 ;EDIT: set label
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j3: jsr j1
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jsl symlong
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jml bank54
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.org $543210
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bank54: cmp f:bank54
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bra nxt54a
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backchk:
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nop ;EDIT: set label
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nop
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rts
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backval:
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.word backchk & $ffff
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.byte bank54 >> 16
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nxt54a:
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; Test forward/backward refs. In cc65 this makes a difference because it's
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; a one-pass assembler.
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lda f:backchk ;EDIT: use symbol
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lda f:fwdchk ;EDIT: use symbol
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lda f:backchk ;EDIT: use hex
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lda f:fwdchk ;EDIT: use hex
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lda a:backchk & $ffff + 1 ;EDIT: use symbol
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lda a:backchk & $ffff - 1 ;EDIT: use symbol
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lda a:fwdchk & $ffff + 1 ;EDIT: use symbol
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lda a:fwdchk & $ffff - 1 ;EDIT: use symbol
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; Test non-bank-0 JSRs. The behavior varies significantly by assembler. The
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; trick is that the high byte comes from the 'K' register. cc65 wants you
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; to remove it for a 16-bit JSR (or fails because the operand is too big),
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; 64tass wants you to keep it in place (or fails because you're trying to
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; jump to the wrong bank), and Merlin32 doesn't care.
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nop
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jsr backchk & $ffff
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jsr backchk & $ffff + 1 ;EDIT: set to "backchk"
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jsr backchk & $ffff + 2 ;leave in hex
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jsr fwdchk & $ffff
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jsr fwdchk & $ffff + 1 ;EDIT: set to "fwdchk"
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jsr fwdchk & $ffff + 2 ;leave in hex
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nop
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ldx #$00
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jsr (backval & $ffff,X)
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jsr (fwdval & $ffff,X)
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jsr jmp1b & $ffff
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jsr jmp1f & $ffff
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jsr jmp2b & $ffff
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jsr jmp2f & $ffff
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jsr jmp3b & $ffff
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jsr jmp3f & $ffff
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bra nxt54b
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; Fun fact: "JMP (addr)" and "JML [addr]" always load the indirect value
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; from zero page. They do *not* use B or K. The (addr,X) mode uses the
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; program bank (K). According to Eyes & Lichty, this is because the
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; non-indexed form assumes you're jumping through a variable, while the
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; indexed form assumes you've got an address table in your code. (Think
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; how they would be used in ROM.)
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jmp2b: jmp (backval & $ffff,X)
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jmp2f: jmp (fwdval & $ffff,X)
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jmp1b: jmp (lodat)
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jmp1f: jmp (lodat)
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jmp3b: jmp [lodat]
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jmp3f: jmp [lodat]
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fwdval:
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.word fwdchk & $ffff
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.byte bank54 >> 16
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fwdchk:
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nop ;EDIT: set label
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nop
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rts
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nxt54b:
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jsr skip ;EDIT: set to "skip" label
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rtl
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