Random line of code thread
category: code [glöplog]
square root algorythm in MC680x0 code:
Code:
MOVE.W #100,d2 ;P
MOVEQ #1,d0 ;a
MOVE.L d2,d1 ;b
loop:
ADD.W d1,d0
DIVS #2,d0
EXT.L d0
MOVE.L d2,d1
DIVS d0,d1
EXT.L d1
MOVE.W d0,d3
MOVE.W d1,d4
SUB.W d3,d4
CMP.W #0,d4
BPL noneg
NOT.W d4
noneg:
CMP.W #1,d4
BGT loop
ADD.W d1,d0
DIVS #2,d0
RTS
68000 popcnt
Code:
mov.l d0, d1
REPT 32
lsr.l #1, d1
sub.l d1, d0
ENDR
Code:
move.b #1,(_mt_Enable) ; finally figured out why the music wasn't playing
Code:
//No need to make boundary tests because we added surroundings!
void Fill(int x,int y,char TestValue,char FillValue) {
Doubled[x][y]=FillValue;
if(Doubled[x-1][y]!=TestValue) { Fill(x-1,y,TestValue,FillValue); }
if(Doubled[x][y-1]!=TestValue) { Fill(x,y-1,TestValue,FillValue); }
if(Doubled[x+1][y]!=TestValue) { Fill(x+1,y,TestValue,FillValue); }
if(Doubled[x][y+1]!=TestValue) { Fill(x,y+1,TestValue,FillValue); }
}
Code:
ld a,[DS_CH1AutopanSpeed]
and a
jr z,.ch2autopan
ld hl,DS_CH1AutopanTimer
dec [hl]
jr nz,.ch2autopan
ld a,[DS_CH1AutopanSpeed]
ld [hl],a
ld a,[DS_CH1AutopanPhase]
inc a
and 3
ld [DS_CH1AutopanPhase],a
ld b,a
and a
ld a,[DS_CH1Autopan]
jr z,:++
: rra
rra
dec b
jr nz,:-
: and %00000011
bit 1,a
jr z,:+
xor %00010010
: ld [DS_CH1Pan],a
Code:
mov al, 13h
int 10h
%if LINE_REPEAT
mov dx,03D4h
out dx,ax
%endif
Code:
plus++;
Code:
fld1
fadd st0
fyl2x ; // log2_base
Code:
#define STR(x) #x
#define XSTR(s) STR(s)
uint16_t numChannelsMinus1 = numChannels - 1;
__asm volatile (
" STEP=" XSTR(LZSS_DECODE_RINGBUFFER) "\n" // step
"move.w #STEP*9, %%d1\n"
".Laud_loop:\n"
// ac_ptr
"moveq #0, %%d0\n"
"move.b STEP*1(%[pos]), -(%%sp)\n" // get upper byte via stack - http://www.easy68k.com/paulrsm/doc/trick68k.htm
"move.w (%%sp)+, %%d0\n"
"move.b 0(%[pos]), %%d0\n"
"add.w %%d0, %%d0\n"
"add.l %[chipmem], %%d0\n"
"move.l %%d0, (%[aud])+\n"
// ac_len
"move.b STEP*3(%[pos]), (%[aud])+\n"
"move.b STEP*2(%[pos]), (%[aud])+\n"
// ac_per
"move.b STEP*5(%[pos]), (%[aud])+\n"
"move.b STEP*4(%[pos]), (%[aud])+\n"
// ac_vol - just ignore the upper byte
//"clr.b (%[aud])+\n"
"move.b STEP*6(%[pos]), 1(%[aud])\n"
// repeat
"move.b STEP*8(%[pos]), -(%%sp)\n" // get upper byte via stack
"move.w (%%sp)+, %%d0\n"
"move.b STEP*7(%[pos]), %%d0\n"
"add.w %%d0, %%d0\n"
"move.w %%d0, 4(%[aud])\n"
"add.w %%d1, %[pos]\n" // next pos
"addq.l #8, %[aud]\n" // next aud
"dbra %[loop], .Laud_loop\n"
: [aud]"+a" (aud), [pos]"+a" (pos), [loop]"+d" (numChannelsMinus1)
: [chipmem]"r" (chipmem)
: "cc", "d0", "d1");
Quote:
THE low level language and no binary? We have to use defines with hex or bit shifting. When I change flags in hardware and want to put one by one the bits. Someone said make a function that accepts a string and returns back tha value.
But it has octal. Why no binary? Even basic had binary.
Of course we have binary: https://godbolt.org/z/7Y9qfEK7o
Code:
e=x<32 and poke4(130912+x,0>(-x>>1&7)+v*math.sin(v*math.sin(t/99))and 0 or(-x>>1&7)+v*math.sin(v*math.sin(t/99))Sizecoding on TIC-80 with a compression stage.
Code:
_pointsText.text = 0.ToString();
(Z80, Amstrad CPC) Makes a part of firmware disappear
Code:
ScreenSize equ &4000
org &8100
ld hl,&C000
ld de,&C000+1
ld bc,ScreenSize-1
ld (hl),0
ldir
ret
#tmp
Code:
Tmp0:=(Tmp0E and $CCCCCCCC) or ((Tmp1E and $CCCCCCCC) shr 2); { 0 2 4 6 8 10 12 14 }
Tmp1:=((Tmp0E and $33333333) shl 2) or (Tmp1E and $33333333); { 1 3 5 7 9 11 13 15 }
Tmp.d[0]:=(Tmp0 and $f0f0f0f0) shr 4;
Tmp.d[1]:=(Tmp1 and $f0f0f0f0) shr 4;
Tmp.d[2]:=(Tmp0 and $0f0f0f0f);
Tmp.d[3]:=(Tmp1 and $0f0f0f0f);
{ 0, 4, 8, 12, }
{ 1, 5, 9, 13, }
{ 2, 6, 10, 14 }
{ 3, 7, 11, 15 }
Code:
// Carbon:
package Geometry api;
import Math;
class Circle {
var r: f32;
}
fn PrintTotalArea(circles: Slice(Circle)) {
var area: f32 = 0;
for (c: Circle in circles) {
area += Math.Pi * c.r * c.r;
}
Print("Total area: {0}", area);
}
fn Main() -> i32 {
// A dynamically sized array, like `std:vector`.
var circles: Array(Circle) = ({.r = 1.0},
.r = 2.0});
// Implicitly converts `Array` to `Slice`.
PrintTotalArea(circles);
return 0;
}
Quote:
Code:fld1 fadd st0 fyl2x ; // log2_base
Oh man ... :D
Thanks for the hint
Send some screenshots of this thread over to Musk.
Code:
DATA(updated_common_fields) = get_updated_common_fields( current_common_fields = select_common_fields( keys = get_keys_for_entity( entity )
table = get_result_table_for_entity( entity ) )
new_common_fields = get_common_fields( changeset_item-entry_provider ) ). .
