spectrum_cmbrot
changeset 1:c2815c765fea
done
| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Mon, 17 Feb 2014 11:00:23 +0200 |
| parents | e56d8b0eee4b |
| children | 34f2fca9690b |
| files | Makefile test.c |
| diffstat | 2 files changed, 24 insertions(+), 8 deletions(-) [+] |
line diff
1.1 --- a/Makefile Mon Feb 17 10:17:17 2014 +0200 1.2 +++ b/Makefile Mon Feb 17 11:00:23 2014 +0200 1.3 @@ -4,7 +4,7 @@ 1.4 bin = test.tap 1.5 1.6 CC = zcc 1.7 -CFLAGS = +zx -pragma-define=myzorg=28000 1.8 +CFLAGS = +zx -pragma-define=myzorg=28000 -O2 1.9 LDFLAGS = -create-app 1.10 1.11 $(bin): $(obj)
2.1 --- a/test.c Mon Feb 17 10:17:17 2014 +0200 2.2 +++ b/test.c Mon Feb 17 11:00:23 2014 +0200 2.3 @@ -13,9 +13,9 @@ 2.4 2.5 for(i=0; i<192; i++) { 2.6 unsigned int banky = i & 0x3f; 2.7 - unsigned int cell = banky / 8; 2.8 - unsigned int cline = banky % 8; 2.9 - unsigned int memline = cell + cline * 8; 2.10 + unsigned int cell = banky >> 3; 2.11 + unsigned int cline = banky & 0x7; 2.12 + unsigned int memline = cell + (cline << 3); 2.13 unsigned char *ptr = FB_ADDR + (start + memline) * LINESKIP; 2.14 2.15 for(j=0; j<32; j++) { /* 256 pixels, 8 pixels per byte */ 2.16 @@ -44,6 +44,8 @@ 2.17 { 2.18 unsigned char i; 2.19 int cx, cy, zx, zy, x, y, len; 2.20 + int xop1, xop2, yop1, yop2; 2.21 + int zxop1, zxop2, zyop1, zyop2; 2.22 2.23 cx = int2fix8_8(px - 192) >> 6; 2.24 cy = int2fix8_8(py - 96) >> 6; 2.25 @@ -55,11 +57,25 @@ 2.26 zy = cy; 2.27 2.28 for(i=0; i<32; i++) { 2.29 - x = fix_mul5_11(zx, zx) - fix_mul5_11(zy, zy) + cx; 2.30 - y = fix_mul5_11(zy, zx) + fix_mul5_11(zx, zy) + cy; 2.31 - len = fix_mul5_11(x, x) + fix_mul5_11(y, y); 2.32 + /*x = fix_mul5_11(zx, zx) - fix_mul5_11(zy, zy) + cx; 2.33 + y = fix_mul5_11(zy, zx) + fix_mul5_11(zx, zy) + cy;*/ 2.34 + zxop1 = zx >> 5; 2.35 + zxop2 = zxop1 >> 1; 2.36 + zyop1 = zy >> 5; 2.37 + zyop2 = zyop1 >> 1; 2.38 2.39 - if(len > int2fix5_11(4)) return 0; 2.40 + x = zxop1 * zxop2 - zyop1 * zyop2 + cx; 2.41 + y = zyop1 * zxop2 + zxop1 * zyop2 + cy; 2.42 + 2.43 + /*len = fix_mul5_11(x, x) + fix_mul5_11(y, y);*/ 2.44 + xop1 = x >> 5; 2.45 + xop2 = xop1 >> 1; 2.46 + yop1 = y >> 5; 2.47 + yop2 = yop1 >> 1; 2.48 + len = xop1 * xop2 + yop1 * yop2; 2.49 + 2.50 + /*if(len > int2fix5_11(4)) return 0;*/ 2.51 + if(len > 8192) return 0; 2.52 2.53 zx = x; 2.54 zy = y;