mirror of
https://github.com/autc04/Retro68.git
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162 lines
2.2 KiB
ArmAsm
162 lines
2.2 KiB
ArmAsm
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;;; Test 68HC11 linker relaxation (group relax)
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;;;
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.sect .text
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.globl _start
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_start:
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;;;
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;;; The following group of instructions are adjusted.
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;;;
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.relax L1x
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ldx #table
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bset 0,x #4
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L1x:
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.relax L1y
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ldy #table
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bset 0,y #4
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L1y:
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.relax L2x
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ldx #table+3
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bset 0,x #4
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bset 1,x #8
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L2x:
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.relax L2y
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ldy #table+3
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bset 0,y #4
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bset 1,y #8
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L2y:
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.relax L3x
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ldx #table+6
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bset 0,x #4
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bset 1,x #8
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bset 2,x #12
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bset 3,x #12
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bset 4,x #12
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bset 5,x #12
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L3x:
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.relax L3y
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ldy #table+6
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bset 0,y #4
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bset 1,y #8
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bset 2,y #12
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bset 3,y #12
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bset 4,y #12
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bset 5,y #12
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L3y:
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;; Next branch is always relative. It must be adjusted while
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;; above instructions are relaxed.
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bra _start
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;;;
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;;; This group has the first two bset insn relaxable while the
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;;; others are not. The ldx/ldy must not be removed.
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;;;
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.relax L4x
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ldx #table+0xfe
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bset 0,x #4
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bset 1,x #8
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bset 2,x #12
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bset 3,x #12
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bset 4,x #12
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bset 5,x #12
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L4x:
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.relax L4y
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ldy #table+0xfe
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bset 0,y #4
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bset 1,y #8
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bset 2,y #12
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bset 3,y #12
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bset 4,y #12
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bset 5,y #12
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L4y:
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;;;
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;;; Relax group for bclr
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;;;
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.relax L5x
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ldx #table+10
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bclr 0,x #4
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bclr 1,x #8
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L5x:
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.relax L5y
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ldy #table+16
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bclr 10,y #4
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bclr 11,y #8
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L5y:
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;;;
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;;; Relax group for brset (with backward branch)
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;;;
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.relax L6x
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ldx #table+8
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brset 0,x #4 L5y
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L6x:
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.relax L7x
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ldy #table+8
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brset 0,y #4 L6x
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L7x:
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;;;
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;;; Relax group for brset (with forward branch)
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;;;
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.relax L8x
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ldx #table+8
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brset 0,x #4 brend
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L8x:
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.relax L8y
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ldy #table+8
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brset 0,y #4 brend
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L8y:
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;;;
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;;; Relax group for brclr (with backward branch)
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;;;
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.relax L9x
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ldx #table+8
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brclr 0,x #4 L8y
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L9x:
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.relax L9y
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ldy #table+8
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brclr 0,y #4 L9x
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L9y:
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;;;
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;;; Relax group for brclr (with forward branch)
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;;;
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.relax L10x
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ldx #table+8
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brclr 0,x #4 brend
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L10x:
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.relax L10y
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ldy #table+8
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brclr 0,y #4 brend
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L10y:
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nop
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brend:
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;;;
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;;; The following are wrong use of .relax groups.
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;;;
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.relax w1
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w1:
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.relax w2
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bset 0,x #4
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w2:
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.relax w3
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ldx #table
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w3:
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.relax w4
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ldy #table+8
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w4:
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.relax w5
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rts
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w5:
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;;;
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;;; Next insn is not in a .relax group
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ldx #table
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bset 0,x #5
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bra _start
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rts
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.sect .page0
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.globl table
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table: .long 0
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table4: .long 0
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table8: .long 0
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.skip 10
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end_table:
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.long 0
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