;;; Test 68HC11 linker relaxation and fixup of bcc/bra branches
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;;; Test 68HC11 linker relaxation and fixup of bcc/bra branches
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;;;
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;;;
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.sect .text
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.sect .text
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.globl _start
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.globl _start
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_start:
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_start:
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;; Next 'bra' is assembled as a 'jmp'. It is relaxed to 'bra L3'
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;; Next 'bra' is assembled as a 'jmp'. It is relaxed to 'bra L3'
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;; during a second pass of relax.
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;; during a second pass of relax.
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bra L3
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bra L3
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.skip 20
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.skip 20
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;; Next 'jmp' must be relaxed to a 'bra' during the first pass.
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;; Next 'jmp' must be relaxed to a 'bra' during the first pass.
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;; The branch offset must then be adjusted by consecutive relax.
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;; The branch offset must then be adjusted by consecutive relax.
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jmp L3
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jmp L3
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L1:
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L1:
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addd 0,x
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addd 0,x
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bne L1 ; Branch not adjusted
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bne L1 ; Branch not adjusted
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addd _toto
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addd _toto
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beq L1 ; Backward branch, adjust -1
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beq L1 ; Backward branch, adjust -1
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addd _toto+1
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addd _toto+1
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jbne L1 ; Backward branch, adjust -2
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jbne L1 ; Backward branch, adjust -2
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bgt L1 ; All possible backward branchs, adjust -2
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bgt L1 ; All possible backward branchs, adjust -2
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bge L1
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bge L1
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beq L1
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beq L1
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ble L1
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ble L1
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blt L1
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blt L1
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bhi L1
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bhi L1
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bhs L1
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bhs L1
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beq L1
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beq L1
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bls L1
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bls L1
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blo L1
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blo L1
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bcs L1
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bcs L1
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bmi L1
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bmi L1
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bvs L1
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bvs L1
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bcc L1
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bcc L1
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bpl L1
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bpl L1
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bvc L1
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bvc L1
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bne L1
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bne L1
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brn L1
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brn L1
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bra L1
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bra L1
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;; Relax several insn to reduce block by 15
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;; Relax several insn to reduce block by 15
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addd _toto
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addd _toto
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addd _toto
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addd _toto
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addd _toto
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addd _toto
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addd _toto
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addd _toto
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addd _toto
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addd _toto
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addd _toto
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addd _toto
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addd _toto
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addd _toto
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addd _toto
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addd _toto
|
addd _toto
|
addd _toto
|
addd _toto
|
addd _toto
|
addd _toto
|
addd _toto
|
addd _toto
|
addd _toto
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addd _toto
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addd _toto
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addd _toto
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addd _toto
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addd _toto
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addd _toto
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L2:
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L2:
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jmp _start ; -> relax to bra _start
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jmp _start ; -> relax to bra _start
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bne L2 ; Backward branch, adjust -1
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bne L2 ; Backward branch, adjust -1
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beq L3 ; Forward branch, adjust -2
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beq L3 ; Forward branch, adjust -2
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addd _toto
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addd _toto
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beq L3 ; Forward branch, adjust -1
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beq L3 ; Forward branch, adjust -1
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addd _toto
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addd _toto
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L3:
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L3:
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addd _toto
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addd _toto
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rts
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rts
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|
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.sect .page0
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.sect .page0
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_bar:
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_bar:
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.long 0
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.long 0
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_toto:
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_toto:
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.long 0
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.long 0
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.skip 32
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.skip 32
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stack:
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stack:
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.skip 10
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.skip 10
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_table:
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_table:
|
|
|
