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{* This is very messy... *}
program testcode;
{.$define test}
function orig_inttostr(buf: pointer; value: longint): pchar; assembler; nostackframe;
asm
// buf = a0, value = d0
{ 362: 41ed 100a } //lea 4106(a5),a0
{ 366: 20bc 204b 0000 } move.l #541786112,(a0) ; <space>K #0 #0 in buffer
{ 36c: e088 } lsr.l #8,d0
{ 36e: e488 } lsr.l #2,d0 ; div by 1024
{ 370: 80fc 000a } divu.w #10,d0 ; word division by 10 -> if result is bigger than 65536 -> havoc
{ 374: 4840 } swap d0
{ 376: 1100 } move.b d0,-(a0)
{ 378: 0610 0030 } addi.b #48,(a0)
{ 37c: e088 } lsr.l #8,d0
{ 37e: e088 } lsr.l #8,d0
{ 380: 80fc 000a } divu.w #10,d0
{ 384: 4840 } swap d0
{ 386: 1100 } move.b d0,-(a0)
{ 388: 0610 0030 } addi.b #48,(a0)
{ 38c: e088 } lsr.l #8,d0
{ 38e: e088 } lsr.l #8,d0
{ 390: 80fc 000a } divu.w #10,d0
{ 394: 4840 } swap d0
{ 396: 1100 } move.b d0,-(a0)
{ 398: 0610 0030 } addi.b #48,(a0)
{ 39c: e088 } lsr.l #8,d0
{ 39e: e088 } lsr.l #8,d0
{$ifdef test}
{ 3a0: 112d 00a6 } move.b #44{','}{166(a5)},-(a0) ; <- separator
{$else}
{ 3a0: 112d 00a6 } move.b 166(a5),-(a0) ; <- separator
{$endif}
{ 3a4: 80fc 000a } divu.w #10,d0
{ 3a8: 4840 } swap d0
{ 3aa: 1100 } move.b d0,-(a0)
{ 3ac: 0610 0030 } addi.b #48,(a0)
{ 3b0: e088 } lsr.l #8,d0
{ 3b2: e088 } lsr.l #8,d0
{ 3b4: 80fc 000a } divu.w #10,d0
{ 3b8: 4840 } swap d0
{ 3ba: 1100 } move.b d0,-(a0)
{ 3bc: 0610 0030 } addi.b #48,(a0)
{ 3c0: 4840 } swap d0
{ 3c2: 1100 } move.b d0,-(a0)
{ 3c4: 0610 0030 } addi.b #48,(a0)
{ 3c8: 0c10 0030 } cmpi.b #48,(a0)
{ 3cc: 6622 } bne.s {0x3f0} @quit
{ 3ce: 5288 } addq.l #1,a0
{ 3d0: 0c10 0030 } cmpi.b #48,(a0)
{ 3d4: 661a } bne.s {0x3f0} @quit
{ 3d6: 5288 } addq.l #1,a0
{ 3d8: 0c10 0030 } cmpi.b #48,(a0)
{ 3dc: 6612 } bne.s {0x3f0} @quit
{ 3de: 5488 } addq.l #2,a0
{ 3e0: 0c10 0030 } cmpi.b #48,(a0)
{ 3e4: 660a } bne.s {0x3f0} @quit
{ 3e6: 5288 } addq.l #1,a0
{ 3e8: 0c10 0030 } cmpi.b #48,(a0)
{ 3ec: 6602 } bne.s {0x3f0} @quit
{ 3ee: 5288 } addq.l #1,a0
{ 3f0: 4e75 } {rts}
@quit:
move.l a0,d0
end;
function new_inttostr(buf: pointer; value: longint): pchar; assembler; nostackframe;
asm
// buf = a0, value = d0
{ 362: 41ed 100a } //lea 4106(a5),a0
{ 366: 20bc 204b 0000 } move.l #541786112,(a0) ; <space>K #0 #0 in buffer
{ 36c: e088 } lsr.l #8,d0
{ 36e: e488 } lsr.l #2,d0 ; div by 1024 -> KiB
@loop:
{ 370: 80fc 000a } divu.w #1000,d0 ; divide by thousand
move.w d0,-(sp) ; store result for later
{ 37c: e088 } lsr.l #8,d0
{ 37e: e088 } lsr.l #8,d0 ; get the remainder
divu.w #10,d0
swap d0
{ 376: 1100 } move.b d0,-(a0)
{ 378: 0610 0030 } addi.b #48,(a0)
{ 37c: e088 } lsr.l #8,d0
{ 37e: e088 } lsr.l #8,d0
{ 380: 80fc 000a } divu.w #10,d0
{ 384: 4840 } swap d0
{ 386: 1100 } move.b d0,-(a0)
{ 388: 0610 0030 } addi.b #48,(a0)
{ 38c: e088 } lsr.l #8,d0
{ 38e: e088 } lsr.l #8,d0
{ 390: 80fc 000a } divu.w #10,d0
{ 394: 4840 } swap d0
{ 396: 1100 } move.b d0,-(a0)
{ 398: 0610 0030 } addi.b #48,(a0)
{ 39c: e088 } lsr.l #8,d0
{ 39e: e088 } lsr.l #8,d0
moveq.l #0,d0
move.w (sp)+,d0
beq.s @test
{$ifdef test}
{ 3a0: 112d 00a6 } move.b #44{','}{166(a5)},-(a0) ; <- separator
{$else}
{ 3a0: 112d 00a6 } move.b 166(a5),-(a0) ; <- separator
{$endif}
bra.s @loop
@test:
{ 3c8: 0c10 0030 } cmpi.b #48,(a0)
{ 3cc: 6622 } bne.s {0x3f0} @quit
{ 3ce: 5288 } addq.l #1,a0
bra.s @test
{ 3f0: 4e75 } {rts}
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
@quit:
move.l a0,d0
end;
procedure test(mem: dword);
var
test: array[0..255] of char;
ptest: pchar;
begin
writeln('Correct: ',mem div 1024);
fillchar(test,sizeof(test),#0);
ptest:=orig_inttostr(@test[255-4],mem);
writeln(' Original: ',ptest);
fillchar(test,sizeof(test),#0);
ptest:=new_inttostr(@test[255-4],mem);
writeln(' New: ',ptest);
end;
begin
test(524288); // some chip mem
test(2097152); // maximum chip mem
test(955252746);
test(1610612736); // maximum z3 range
end.