penalties for using unlicensed software for getting some extra cycles on some parts of the code for something that is merely a hobby, even if the probability is near zero, but not zero.
this is even true that there is a probability that SDCC development would stop.
Don't know if it is zero or more, but surely not zero ;-)
It is a long time since I did comparisons among compilers
This is an old simple test for circle compiled in HI-Tech C cross compiler
That would be more helpful as plain C source, without generated bytes and asm. So I could try it with both compilers, and with different versions of compilers, and try different optimisation levels.
Just fixing the formatting of Artrag’s post:
It is a long time since I did comparisons among compilers
This is an old simple test for circle compiled in HI-Tech C cross compiler
#include <stdio.h>
#include <sys.h>
#define di() asm("di")
#define ei() asm("ei")
void NameTableInit();
void vdpsetreg (unsigned char regno, unsigned char value)
{
di();
outp(0x99, value);
outp(0x99, regno | 0x80);
ei();
}
unsigned char vrampeek(unsigned int addr)
{
di();
outp(0x99, addr & 255);
outp(0x99, (addr >> 8) & 0x3f);
ei();
return inp(0x98);
}
void vrampoke(unsigned int addr, unsigned char byte)
{
di();
outp(0x99, addr & 255);
outp(0x99, 0x40 | ((addr >> 8) & 0x3f));
ei();
outp(0x98, byte);
}
/*
void setpixel(unsigned char x, unsigned char y)
{
unsigned int vddr = (x & 0xf8) + (y & 7) + (int)256 * (y>>3);
unsigned char byte = vrampeek(vddr) | (128 >> (x & 7));
vrampoke(vddr, byte );
}
*/
void sc2()
{
unsigned char r;
unsigned int counter;
static unsigned char vdpregs[] = {0x02,0x60,0x06,0xFF, 0x03, 0x36, 0x07,0x04};
for (r =0;r<sizeof(vdpregs);r++)
vdpsetreg(r,vdpregs[r]);
// vrampoke (0x1800,0);
// for (counter=1;counter<256*3;counter++)
// outp(0x98,counter & 255);
di();
NameTableInit();
vrampoke (0x2000,0xF1);
for (counter=1;counter<3*256*8;counter++)
outp(0x98,0xF1);
vrampoke (0x0000,0x00);
for (counter=1;counter<3*256*8;counter++)
outp(0x98,0x00);
}
void pset(unsigned char x, unsigned char y);
void plotpoints(unsigned int x, unsigned int y, unsigned int cx, unsigned int cy)
{
pset((unsigned char)cx+x,(unsigned char)cy+y);
pset((unsigned char)cx-x,(unsigned char)cy+y);
pset((unsigned char)cx-x,(unsigned char)cy-y);
pset((unsigned char)cx+x,(unsigned char)cy-y);
pset((unsigned char)cx+y,(unsigned char)cy+x);
pset((unsigned char)cx-y,(unsigned char)cy+x);
pset((unsigned char)cx-y,(unsigned char)cy-x);
pset((unsigned char)cx+y,(unsigned char)cy-x);
}
void circle(unsigned int cx, unsigned int cy, unsigned int radius)
{
int x, y, d;
x = 0; y = radius;
d = 3 - 2*radius;
while (x<y)
{
plotpoints(x, y, cx, cy);
if ( d<0 )
d = d + 4*x + 6;
else
{
d = d + 4*(x-y) + 10;
y--;
}
x++;
}
if (x==y)
plotpoints(x, y, cx, cy);
}
int exec_time;
void main(void)
{
unsigned char px;
sc2();
*(int*)0xFC9E = 0;
for (px=0;px<96;px+=2)
{
circle(127,95, px);
}
exec_time = (*(int*)0xFC9E);
while(1) {}
}
This is the asm
HI-TECH SOFTWARE Z80 Macro Assembler Thu Sep 23 22:43:16 2010
Page 1
1 global small_model
2 global _vdpsetreg
3 signat _vdpsetreg,8248
4 0000' psect text,class=CODE
5 file "CIRCLE.C"
6 line 10
7 0000' _vdpsetreg:
8 ;CIRCLE.C: 11: asm("di");
9 line 11
11 0000' F3 di ;#
12 ;CIRCLE.C: 12: (*(port unsigned char *)(0x99) =
(value));
13 line 12
14 0001' 79 ld a,c
15 0002' D3 99 out (099h),a
16 ;CIRCLE.C: 13: (*(port unsigned char *)(0x99) =
(regno | 0x80));
17 line 13
18 0004' 7B ld a,e
19 0005' F6 80 or -128
20 0007' D3 99 out (099h),a
21 ;CIRCLE.C: 14: asm("ei");
22 line 14
14 0009' FB ei ;#
15 ;CIRCLE.C: 15: }
16 line 15
17 000A' C9 ret
18 global _vrampeek
19 signat _vrampeek,4153
20 line 18
21 000B' _vrampeek:
22 ;CIRCLE.C: 19: asm("di");
23 line 19
19 000B' F3 di ;#
20 ;CIRCLE.C: 20: (*(port unsigned char *)(0x99) =
(addr & 255));
21 line 20
22 000C' 7B ld a,e
23 000D' D3 99 out (099h),a
24 ;CIRCLE.C: 21: (*(port unsigned char *)(0x99) =
((addr >> 8) & 0x3f));
25 line 21
26 000F' 7A ld a,d
27 0010' E6 3F and 03Fh
28 0012' D3 99 out (099h),a
29 ;CIRCLE.C: 22: asm("ei");
30 line 22
22 0014' FB ei ;#
23 ;CIRCLE.C: 23: return (*(port unsigned char *)(0
x98));
24 line 23
25 0015' DB 98 in a,(098h)
26 0017' 6F ld l,a
27 0018' C9 ret
28 ;CIRCLE.C: 24: }
HI-TECH SOFTWARE Z80 Macro Assembler Thu Sep 23 22:43:16 2010
Page 2
29 line 24
30 global _vrampoke
31 signat _vrampoke,8248
32 line 27
33 0019' _vrampoke:
34 ;CIRCLE.C: 28: asm("di");
35 line 28
28 0019' F3 di ;#
29 ;CIRCLE.C: 29: (*(port unsigned char *)(0x99) =
(addr & 255));
30 line 29
31 001A' 7B ld a,e
32 001B' D3 99 out (099h),a
33 ;CIRCLE.C: 30: (*(port unsigned char *)(0x99) =
(0x40 | ((addr >> 8) & 0x3f)));
34 line 30
35 001D' 7A ld a,d
36 001E' E6 3F and 03Fh
37 0020' F6 40 or 040h
38 0022' D3 99 out (099h),a
39 ;CIRCLE.C: 31: asm("ei");
40 line 31
31 0024' FB ei ;#
32 ;CIRCLE.C: 32: (*(port unsigned char *)(0x98) =
(byte));
33 line 32
34 0025' 79 ld a,c
35 0026' D3 98 out (098h),a
36 ;CIRCLE.C: 33: }
37 line 33
38 0028' C9 ret
39 global _sc2
40 signat _sc2,24
41 0000' psect data,class=DATA
42 0000' F245:
43 0000' 02 defb 02h
44 0001' 60 defb 060h
45 0002' 06 defb 06h
46 0003' FF defb -1
47 0004' 03 defb 03h
48 0005' 36 defb 036h
49 0006' 07 defb 07h
50 0007' 04 defb 04h
51 global _NameTableInit
52 signat _NameTableInit,24
53 ;CIRCLE.C: 54: for (r =0;r<sizeof(vdpregs);r++)
54 0029' psect text
55 line 47
56 0029' _sc2:
57 0029' DD E5 push ix
58 002B' DD 21 0000 ld ix,0
59 002F' DD 39 add ix,sp
60 0031' 3B dec sp
61 ;CIRCLE.C: 48: unsigned char r;
62 line 54
HI-TECH SOFTWARE Z80 Macro Assembler Thu Sep 23 22:43:16 2010
Page 3
63 0032' DD 36 FF 00 ld (ix+-1),0
64 line 55
65 0036' l8:
66 ;CIRCLE.C: 55: vdpsetreg(r,vdpregs[r]);
67 0036' 21 0000' ld hl,F245
68 0039' DD 7E FF ld a,(ix+-1)
69 003C' 85 add a,l
70 003D' 6F ld l,a
71 003E' 7C ld a,h
72 003F' CE 00 adc a,0
73 0041' 67 ld h,a
74 0042' 4E ld c,(hl)
75 0043' DD 5E FF ld e,(ix+-1)
76 0046' CD 0000' call _vdpsetreg
77 ; _r loaded to e
78 line 54
79 0049' DD 5E FF ld e,(ix+-1)
80 004C' 1C inc e
81 ;_r stored from e
82 004D' DD 73 FF ld (ix+-1),e
83 0050' 7B ld a,e
84 0051' FE 08 cp 08h
85 0053' 38 E1 jp c,l8
86 ;CIRCLE.C: 60: asm("di");
87 line 60
60 0055' F3 di ;#
61 ;CIRCLE.C: 61: NameTableInit();
62 line 61
63 0056' CD 0000* call _NameTableInit
64 ;CIRCLE.C: 63: vrampoke (0x2000,0xF1);
65 line 63
66 0059' 0E F1 ld c,-15
67 005B' 11 2000 ld de,02000h
68 005E' CD 0019' call _vrampoke
69 ;CIRCLE.C: 64: for (counter=1;counter<3*256*8;co
unter++)
70 ; _counter allocated to bc
71 line 64
72 0061' 01 0001 ld bc,01h
73 line 65
74 0064' l11:
75 ;CIRCLE.C: 65: (*(port unsigned char *)(0x98) =
(0xF1));
76 0064' 3E F1 ld a,-15
77 0066' D3 98 out (098h),a
78 line 64
79 0068' 03 inc bc
80 0069' 11 1800 ld de,01800h
81 006C' 69 ld l,c
82 006D' 60 ld h,b
83 006E' B7 or a
84 006F' ED 52 sbc hl,de
85 0071' 38 F1 jp c,l11
86 ;CIRCLE.C: 67: vrampoke (0x0000,0x00);
87 line 67
HI-TECH SOFTWARE Z80 Macro Assembler Thu Sep 23 22:43:16 2010
Page 4
88 0073' 0E 00 ld c,0
89 0075' 11 0000 ld de,0
90 0078' CD 0019' call _vrampoke
91 ;CIRCLE.C: 68: for (counter=1;counter<3*256*8;co
unter++)
92 line 68
93 007B' 01 0001 ld bc,01h
94 line 69
95 007E' l14:
96 ;CIRCLE.C: 69: (*(port unsigned char *)(0x98) =
(0x00));
97 007E' 3E 00 ld a,0
98 0080' D3 98 out (098h),a
99 line 68
100 0082' 03 inc bc
101 0083' 11 1800 ld de,01800h
102 0086' 69 ld l,c
103 0087' 60 ld h,b
104 0088' B7 or a
105 0089' ED 52 sbc hl,de
106 008B' 38 F1 jp c,l14
107 ;CIRCLE.C: 70: }
108 line 70
109 008D' DD F9 ld sp,ix
110 008F' DD E1 pop ix
111 0091' C9 ret
112 global _plotpoints
113 signat _plotpoints,16440
114 global _pset
115 signat _pset,8248
116 ;CIRCLE.C: 72: void pset(unsigned char x, unsign
ed char y);
117 ;CIRCLE.C: 74: void plotpoints(unsigned int x, u
nsigned int y, unsigned int cx, unsigned int cy)
118 ;CIRCLE.C: 75: {
119 line 75
120 0092' _plotpoints:
121 0092' DD E5 push ix
122 0094' DD 21 0000 ld ix,0
123 0098' DD 39 add ix,sp
124 009A' C5 push bc
125 009B' C5 push bc
126 009C' FD E5 push iy
127 ;_y stored from bc
128 009E' DD 71 FC ld (ix+-4),c
129 00A1' DD 70 FD ld (ix+-3),b
130 ;_x stored from de
131 line 76
132 00A4' DD 73 FE ld (ix+-2),e
133 00A7' DD 72 FF ld (ix+-1),d
134 ;CIRCLE.C: 76: pset((unsigned char)cx+x,(unsigne
d char)cy+y);
135 ; _cy loaded to iy
136 00AA' DD 6E 06 ld l,(ix+6)
137 00AD' DD 66 07 ld h,(ix+7)
HI-TECH SOFTWARE Z80 Macro Assembler Thu Sep 23 22:43:16 2010
Page 5
138 00B0' E5 push hl
139 00B1' FD E1 pop iy
140 00B3' 7D ld a,l
141 00B4' DD 86 FC add a,(ix+-4)
142 00B7' 4F ld c,a
143 00B8' DD 7E 04 ld a,(ix+4)
144 00BB' DD 86 FE add a,(ix+-2)
145 00BE' 5F ld e,a
146 00BF' CD 0000* call _pset
147 ;CIRCLE.C: 77: pset((unsigned char)cx-x,(unsigne
d char)cy+y);
148 line 77
149 00C2' FD E5 push iy
150 00C4' E1 pop hl
151 00C5' 7D ld a,l
152 00C6' DD 86 FC add a,(ix+-4)
153 00C9' 4F ld c,a
154 00CA' DD 7E 04 ld a,(ix+4)
155 00CD' DD 96 FE sub (ix+-2)
156 00D0' 5F ld e,a
157 00D1' CD 0000* call _pset
158 ;CIRCLE.C: 78: pset((unsigned char)cx-x,(unsigne
d char)cy-y);
159 line 78
160 00D4' FD E5 push iy
161 00D6' E1 pop hl
162 00D7' 7D ld a,l
163 00D8' DD 96 FC sub (ix+-4)
164 00DB' 4F ld c,a
165 00DC' DD 7E 04 ld a,(ix+4)
166 00DF' DD 96 FE sub (ix+-2)
167 00E2' 5F ld e,a
168 00E3' CD 0000* call _pset
169 ;CIRCLE.C: 79: pset((unsigned char)cx+x,(unsigne
d char)cy-y);
170 line 79
171 00E6' FD E5 push iy
172 00E8' E1 pop hl
173 00E9' 7D ld a,l
174 00EA' DD 96 FC sub (ix+-4)
175 00ED' 4F ld c,a
176 00EE' DD 7E 04 ld a,(ix+4)
177 00F1' DD 86 FE add a,(ix+-2)
178 00F4' 5F ld e,a
179 00F5' CD 0000* call _pset
180 ;CIRCLE.C: 81: pset((unsigned char)cx+y,(unsigne
d char)cy+x);
181 line 81
182 00F8' FD E5 push iy
183 00FA' E1 pop hl
184 00FB' 7D ld a,l
185 00FC' DD 86 FE add a,(ix+-2)
186 00FF' 4F ld c,a
187 0100' DD 7E 04 ld a,(ix+4)
188 0103' DD 86 FC add a,(ix+-4)
HI-TECH SOFTWARE Z80 Macro Assembler Thu Sep 23 22:43:16 2010
Page 6
189 0106' 5F ld e,a
190 0107' CD 0000* call _pset
191 ;CIRCLE.C: 82: pset((unsigned char)cx-y,(unsigne
d char)cy+x);
192 line 82
193 010A' FD E5 push iy
194 010C' E1 pop hl
195 010D' 7D ld a,l
196 010E' DD 86 FE add a,(ix+-2)
197 0111' 4F ld c,a
198 0112' DD 7E 04 ld a,(ix+4)
199 0115' DD 96 FC sub (ix+-4)
200 0118' 5F ld e,a
201 0119' CD 0000* call _pset
202 ;CIRCLE.C: 83: pset((unsigned char)cx-y,(unsigne
d char)cy-x);
203 line 83
204 011C' FD E5 push iy
205 011E' E1 pop hl
206 011F' 7D ld a,l
207 0120' DD 96 FE sub (ix+-2)
208 0123' 4F ld c,a
209 0124' DD 7E 04 ld a,(ix+4)
210 0127' DD 96 FC sub (ix+-4)
211 012A' 5F ld e,a
212 012B' CD 0000* call _pset
213 ;CIRCLE.C: 84: pset((unsigned char)cx+y,(unsigne
d char)cy-x);
214 line 84
215 012E' FD E5 push iy
216 0130' E1 pop hl
217 0131' 7D ld a,l
218 0132' DD 96 FE sub (ix+-2)
219 0135' 4F ld c,a
220 0136' DD 7E 04 ld a,(ix+4)
221 0139' DD 86 FC add a,(ix+-4)
222 013C' 5F ld e,a
223 013D' CD 0000* call _pset
224 ;CIRCLE.C: 86: }
225 line 86
226 0140' FD E1 pop iy
227 0142' DD F9 ld sp,ix
228 0144' DD E1 pop ix
229 0146' E1 pop hl
230 0147' F1 pop af
231 0148' F1 pop af
232 0149' E9 jp (hl)
233 global _circle
234 signat _circle,12344
235 global wrelop
236 ;CIRCLE.C: 89: void circle(unsigned int cx, unsi
gned int cy, unsigned int radius)
237 ;CIRCLE.C: 90: {
238 line 90
239 014A' _circle:
HI-TECH SOFTWARE Z80 Macro Assembler Thu Sep 23 22:43:16 2010
Page 7
240 014A' DD E5 push ix
241 014C' DD 21 0000 ld ix,0
242 0150' DD 39 add ix,sp
243 0152' C5 push bc
244 0153' C5 push bc
245 0154' C5 push bc
246 0155' C5 push bc
247 0156' FD E5 push iy
248 ;_cy stored from bc
249 line 92
250 0158' DD 71 FC ld (ix+-4),c
251 015B' DD 70 FD ld (ix+-3),b
252 ;_cx stored from de
253 015E' DD 73 FE ld (ix+-2),e
254 0161' DD 72 FF ld (ix+-1),d
255 ;CIRCLE.C: 91: int x, y, d;
256 ; _x allocated to iy
257 0164' FD 21 0000 ld iy,0
258 0168' DD 6E 04 ld l,(ix+4)
259 016B' DD 66 05 ld h,(ix+5)
260 016E' DD 75 F8 ld (ix+-8),l
261 0171' DD 74 F9 ld (ix+-7),h
262 ;CIRCLE.C: 93: d = 3 - 2*radius;
263 ; _d allocated to bc
264 line 93
265 0174' 29 add hl,hl
266 0175' EB ex de,hl
267 0176' 21 0003 ld hl,03h
268 0179' B7 or a
269 017A' ED 52 sbc hl,de
270 017C' E5 push hl
271 017D' C1 pop bc
272 ;CIRCLE.C: 94: while (x<y)
273 line 94
274 017E' 18 5A jp l19
275 0180' l20:
276 ;CIRCLE.C: 95: {
277 line 96
278 0180' DD 6E FC ld l,(ix+-4)
279 0183' DD 66 FD ld h,(ix+-3)
280 0186' E5 push hl
281 0187' DD 6E FE ld l,(ix+-2)
282 018A' DD 66 FF ld h,(ix+-1)
283 018D' E5 push hl
284 018E' DD 4E F8 ld c,(ix+-8)
285 0191' DD 46 F9 ld b,(ix+-7)
286 0194' FD E5 push iy
287 0196' D1 pop de
288 0197' CD 0092' call _plotpoints
289 ;CIRCLE.C: 97: if ( d<0 )
290 ; _d loaded to bc
291 line 97
292 019A' DD 4E FA ld c,(ix+-6)
293 019D' DD 46 FB ld b,(ix+-5)
294 01A0' CB 78 bit 07h,b
HI-TECH SOFTWARE Z80 Macro Assembler Thu Sep 23 22:43:16 2010
Page 8
295 01A2' 28 10 jp z,l22
296 ;CIRCLE.C: 98: d = d + 4*x + 6;
297 line 98
298 01A4' 59 ld e,c
299 01A5' 50 ld d,b
300 01A6' FD E5 push iy
301 01A8' E1 pop hl
302 01A9' 29 add hl,hl
303 01AA' 29 add hl,hl
304 01AB' 19 add hl,de
305 01AC' 11 0006 ld de,06h
306 01AF' 19 add hl,de
307 01B0' E5 push hl
308 01B1' C1 pop bc
309 ;CIRCLE.C: 99: else
310 01B2' 18 24 jp l23
311 line 99
312 01B4' l22:
313 ;CIRCLE.C: 100: {
314 line 101
315 01B4' DD 5E F8 ld e,(ix+-8)
316 01B7' DD 56 F9 ld d,(ix+-7)
317 01BA' FD E5 push iy
318 01BC' E1 pop hl
319 01BD' B7 or a
320 01BE' ED 52 sbc hl,de
321 01C0' 29 add hl,hl
322 01C1' 29 add hl,hl
323 01C2' 59 ld e,c
324 01C3' 50 ld d,b
325 01C4' 19 add hl,de
326 01C5' 11 000A ld de,0Ah
327 01C8' 19 add hl,de
328 01C9' E5 push hl
329 01CA' C1 pop bc
330 ;CIRCLE.C: 102: y--;
331 line 102
332 01CB' DD 6E F8 ld l,(ix+-8)
333 01CE' DD 66 F9 ld h,(ix+-7)
334 01D1' 2B dec hl
335 01D2' DD 75 F8 ld (ix+-8),l
336 01D5' DD 74 F9 ld (ix+-7),h
337 line 103
338 01D8' l23:
339 ;CIRCLE.C: 103: }
340 ;CIRCLE.C: 104: x++;
341 line 104
342 01D8' FD 23 inc iy
343 line 105
344 01DA' l19:
345 ;CIRCLE.C: 105: }
346 ;_d stored from bc
347 line 104
348 01DA' DD 71 FA ld (ix+-6),c
349 01DD' DD 70 FB ld (ix+-5),b
HI-TECH SOFTWARE Z80 Macro Assembler Thu Sep 23 22:43:16 2010
Page 9
350 line 94
351 01E0' DD 5E F8 ld e,(ix+-8)
352 01E3' DD 56 F9 ld d,(ix+-7)
353 01E6' FD E5 push iy
354 01E8' E1 pop hl
355 01E9' CD 0000* call wrelop
356 01EC' FA 0180' jp m,l20
357 ;CIRCLE.C: 106: if (x==y)
358 line 106
359 01EF' DD 4E F8 ld c,(ix+-8)
360 01F2' DD 46 F9 ld b,(ix+-7)
361 01F5' FD E5 push iy
362 01F7' E1 pop hl
363 01F8' B7 or a
364 01F9' ED 42 sbc hl,bc
365 01FB' 20 14 jp nz,l18
366 ;CIRCLE.C: 107: plotpoints(x, y, cx, cy);
367 line 107
368 01FD' DD 6E FC ld l,(ix+-4)
369 0200' DD 66 FD ld h,(ix+-3)
370 0203' E5 push hl
371 0204' DD 6E FE ld l,(ix+-2)
372 0207' DD 66 FF ld h,(ix+-1)
373 020A' E5 push hl
374 020B' FD E5 push iy
375 020D' D1 pop de
376 020E' CD 0092' call _plotpoints
377 ;CIRCLE.C: 108: }
378 line 108
379 0211' l18:
380 0211' FD E1 pop iy
381 0213' DD F9 ld sp,ix
382 0215' DD E1 pop ix
383 0217' E1 pop hl
384 0218' F1 pop af
385 0219' E9 jp (hl)
386 global _main
387 signat _main,24
388 global _exec_time
389 ;CIRCLE.C: 111: int exec_time;
390 ;CIRCLE.C: 113: void main(void)
391 ;CIRCLE.C: 114: {
392 line 114
393 021A' _main:
394 021A' DD E5 push ix
395 021C' DD 21 0000 ld ix,0
396 0220' DD 39 add ix,sp
397 0222' 3B dec sp
398 ;CIRCLE.C: 116: unsigned char px;
399 line 119
400 0223' CD 0029' call _sc2
401 ;CIRCLE.C: 121: *(int*)0xFC9E = 0;
402 line 121
403 0226' 21 0000 ld hl,0
404 0229' 22 FC9E ld (-866),hl
HI-TECH SOFTWARE Z80 Macro Assembler Thu Sep 23 22:43:16 2010
Page 10
405 ;CIRCLE.C: 123: for (px=0;px<96;px+=2)
406 line 123
407 022C' DD 75 FF ld (ix+-1),l
408 line 124
409 022F' l26:
410 ;CIRCLE.C: 124: {
411 ;CIRCLE.C: 125: circle(127,95, px);
412 line 125
413 022F' DD 6E FF ld l,(ix+-1)
414 0232' 26 00 ld h,0
415 0234' E5 push hl
416 0235' 01 005F ld bc,05Fh
417 0238' 11 007F ld de,07Fh
418 023B' CD 014A' call _circle
419 ;CIRCLE.C: 126: }
420 ; _px loaded to c
421 line 123
422 023E' DD 4E FF ld c,(ix+-1)
423 0241' 0C inc c
424 0242' 0C inc c
425 ;_px stored from c
426 0243' DD 71 FF ld (ix+-1),c
427 0246' 79 ld a,c
428 0247' FE 60 cp 060h
429 0249' 38 E4 jp c,l26
430 ;CIRCLE.C: 127: exec_time = (*(int*)0xFC9E);
431 line 127
432 024B' 2A FC9E ld hl,(-866)
433 024E' 22 0000' ld (_exec_time),hl
434 ;CIRCLE.C: 129: while(1) {}
435 line 129
436 0251' l29:
437 0251' 18 FE jp l29
438 0000' psect bss,class=DATA
439 0000' _exec_time:
440 0000' defs 2
441 0253' psect text
HI-TECH SOFTWARE Z80 Macro Assembler Thu Sep 23 22:43:16 2010
Page 11
---------- Symbol Table ----------
(ABS) 0000# CODE 0000 CODE 0000
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small_model 0000* text 0253# wrelop 0000*
9 jump optimizations
The reality: if the developer stops one should hope that another will carry on the development of the project itself-
Irrelevant. If the developers abandon a project, the sources will not immediately disappear. Even if they decide to remove the sources from Git, a number of users will still have them and eventually someone will upload them back or to somewhere else.
Instead relevant. you are stuck like a in commercial program unless you are able to build this on your machine. That's not guarateed at 100%.
Usually when a software stops working due os major revision change, you just have to recompile the thing to get it working again. Sometimes also minor fixes are required. But you cannot do that without the sources.
not nearly true at 100%. It does depend on the thing that is stopping you.
About SDCC, it's user base is large enough to guarantee that its development will not stop any time soon. But in the worst case, we still would have the sources.
Large enough? and what are interested in z80 target? For some of the other targets there are surely better alternatives.
I think also that if one contact Hitech-C and ask to put publicly available the source they will acknoledge.
I doubt that.
Who are you to said this? The owner of the Microchip or Hitech-C ?
More probably they are not replying because we are not reaching them properly. (like old email or so)
If they do not want to release as opensource they surely reply their denial to you to have a reason to pursuit you ( even this sound simply ridiculus )
When Nintendo (that is iper protective on license) want to pursue you first they try to contact you to dissuade.
So i do not think Hitech C will waste time to keep silent and later issue a legal action to MSX people.
So contact them then…
Seems that the email legal.department@microchip.com is the only valid way to contact them about this matter.
to see the difference one should also publish the SDCC asm code.
But see, the compiler uses a lot two 16 bit reg pair to pass parameter instead of stack. only when it run out it does push parameters. This results in faster and momre compact code in a lot of situations, because z80 is not so good at relative stack addressing as we know.
At least this part is looking pretty good:
262 ;CIRCLE.C: 93: d = 3 - 2*radius; 263 ; _d allocated to bc 264 line 93 265 0174' 29 add hl,hl 266 0175' EB ex de,hl 267 0176' 21 0003 ld hl,03h 268 0179' B7 or a 269 017A' ED 52 sbc hl,de
Using add hl,hl for multiplications by 2, usage of ex de,hl…
270 017C' E5 push hl 271 017D' C1 pop bc
But then this part which follows seems very obviously and trivially optimisable to ld l,c / ld b,h.
(Of course since it’s closed source and dead for decades there is no way to improve this.)
PingPong, your quotes are a mess. I'll try to guess which text is yours...
Instead relevant. you are stuck like a in commercial program unless you are able to build this on your machine. That's not guarateed at 100%
Of course I can build SDCC on my machine, so it is 100% quaranteed.
Large enough? and what are interested in z80 target? For some of the other targets there are surely better alternatives.
Large enough. In addition to the MSX community, there are communities and developers targeting ZX Spectrum, Amstrad CPC, Coleco, old arcade boards, etc.
Who are you to said this? The owner of the Microchip or Hitech-C ?
I can't doubt something without owning Microchip? Right.
So contact them and tell us what (if) they reply.
Don't preach unless you are a priest. Use Hi-tech c if you want, and let others use whatever we want.
yeah, about the quotes you are absolutely right. Replying from a mobile device makes things even worse because of automatic corrections :-(
About the build, this is also true for me, i can build from sources, but speaking on actual situation. what does happen is, that when a project is abandoned difficulties arise.
About community size, well i thing almost two order of magnitute larger. This is the size that ensure statistically the possibility to keep a project going on.
As a prove of insuffient comunity i ask you a simple question: why, if the community is large enough there is no pratically a good evolution on SDCC compiler in terms of performances? SDCC is active for long enough but improvements are very small. that's the point. lack of interest and small community
About the use of what compiler one want to use i'm not killing anyone. To me as said multiple times what matter is the efficience ( or deficience in the case of SDCC ) of the code generated.
Let's compile artrag source with SDCC and do a comparison. Then see the difference. Stop.
Next, you are able to develop for msx with anything you want, that's your problem. To me, i live happy even if you manage to program your msx using a punching card reader.