1 ;;; Test 68HC11 linker relaxation (group relax) 2 ;;; 3 .sect .text 4 .globl _start 5 _start: 6 ;;; 7 ;;; The following group of instructions are adjusted. 8 ;;; 9 .relax L1x 10 ldx #table 11 bset 0,x #4 12 L1x: 13 .relax L1y 14 ldy #table 15 bset 0,y #4 16 L1y: 17 .relax L2x 18 ldx #table+3 19 bset 0,x #4 20 bset 1,x #8 21 L2x: 22 .relax L2y 23 ldy #table+3 24 bset 0,y #4 25 bset 1,y #8 26 L2y: 27 .relax L3x 28 ldx #table+6 29 bset 0,x #4 30 bset 1,x #8 31 bset 2,x #12 32 bset 3,x #12 33 bset 4,x #12 34 bset 5,x #12 35 L3x: 36 .relax L3y 37 ldy #table+6 38 bset 0,y #4 39 bset 1,y #8 40 bset 2,y #12 41 bset 3,y #12 42 bset 4,y #12 43 bset 5,y #12 44 L3y: 45 ;; Next branch is always relative. It must be adjusted while 46 ;; above instructions are relaxed. 47 bra _start 48 ;;; 49 ;;; This group has the first two bset insn relaxable while the 50 ;;; others are not. The ldx/ldy must not be removed. 51 ;;; 52 .relax L4x 53 ldx #table+0xfe 54 bset 0,x #4 55 bset 1,x #8 56 bset 2,x #12 57 bset 3,x #12 58 bset 4,x #12 59 bset 5,x #12 60 L4x: 61 .relax L4y 62 ldy #table+0xfe 63 bset 0,y #4 64 bset 1,y #8 65 bset 2,y #12 66 bset 3,y #12 67 bset 4,y #12 68 bset 5,y #12 69 L4y: 70 ;;; 71 ;;; Relax group for bclr 72 ;;; 73 .relax L5x 74 ldx #table+10 75 bclr 0,x #4 76 bclr 1,x #8 77 L5x: 78 .relax L5y 79 ldy #table+16 80 bclr 10,y #4 81 bclr 11,y #8 82 L5y: 83 ;;; 84 ;;; Relax group for brset (with backward branch) 85 ;;; 86 .relax L6x 87 ldx #table+8 88 brset 0,x #4 L5y 89 L6x: 90 .relax L7x 91 ldy #table+8 92 brset 0,y #4 L6x 93 L7x: 94 ;;; 95 ;;; Relax group for brset (with forward branch) 96 ;;; 97 .relax L8x 98 ldx #table+8 99 brset 0,x #4 brend 100 L8x: 101 .relax L8y 102 ldy #table+8 103 brset 0,y #4 brend 104 L8y: 105 ;;; 106 ;;; Relax group for brclr (with backward branch) 107 ;;; 108 .relax L9x 109 ldx #table+8 110 brclr 0,x #4 L8y 111 L9x: 112 .relax L9y 113 ldy #table+8 114 brclr 0,y #4 L9x 115 L9y: 116 ;;; 117 ;;; Relax group for brclr (with forward branch) 118 ;;; 119 .relax L10x 120 ldx #table+8 121 brclr 0,x #4 brend 122 L10x: 123 .relax L10y 124 ldy #table+8 125 brclr 0,y #4 brend 126 L10y: 127 nop 128 brend: 129 ;;; 130 ;;; The following are wrong use of .relax groups. 131 ;;; 132 .relax w1 133 w1: 134 .relax w2 135 bset 0,x #4 136 w2: 137 .relax w3 138 ldx #table 139 w3: 140 .relax w4 141 ldy #table+8 142 w4: 143 .relax w5 144 rts 145 w5: 146 ;;; 147 ;;; Next insn is not in a .relax group 148 ldx #table 149 bset 0,x #5 150 bra _start 151 rts 152 153 .sect .page0 154 .globl table 155 table: .long 0 156 table4: .long 0 157 table8: .long 0 158 .skip 10 159 end_table: 160 .long 0 161 162
