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https://git.sr.ht/~rabbits/uxn
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Experimenting with signed cmp
This commit is contained in:
neauoire
parent
ea8fa6e1ed
commit
195a54c6d6
5 changed files with 79 additions and 47 deletions
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@ -48,7 +48,7 @@ char ops[][4] = {
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"BRK", "NOP", "LIT", "LDR", "STR", "---", "JMP", "JSR",
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"EQU", "NEQ", "GTH", "LTH", "AND", "ORA", "EOR", "SFT",
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"POP", "DUP", "SWP", "OVR", "ROT", "---", "CLN", "STH",
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"ADD", "SUB", "MUL", "DIV", "---", "---", "---", "---"
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"ADD", "SUB", "MUL", "DIV", "---", "---", "GTS", "LTS"
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};
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int scin(char *s, char c) { int i = 0; while(s[i]) if(s[i++] == c) return i - 1; return -1; } /* string char index */
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2
build.sh
2
build.sh
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@ -20,5 +20,5 @@ cc -std=c89 -DDEBUG -Wall -Wno-unknown-pragmas -Wpedantic -Wshadow -Wextra -Werr
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# cc uxn.c emulator.c -std=c89 -Os -DNDEBUG -g0 -s -Wall -Wno-unknown-pragmas -L/usr/local/lib -lSDL2 -o bin/emulator
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# run
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./bin/assembler projects/software/nasu.usm bin/boot.rom
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./bin/assembler projects/examples/gui.shapes.usm bin/boot.rom
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./bin/emulator bin/boot.rom
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@ -3,11 +3,19 @@
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%RTN { JMP2r }
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%++ { #0001 ADD2 }
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%8+ { #0008 ADD2 }
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%ABS2 { DUP2 #000f SFT2 #ffff SWP2 SWP POP MUL2? }
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;label { x 2 y 2 color 1 addr 2 }
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;pict { x 2 y 2 width 2 height 2 color 1 addr 2 }
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;rect { x1 2 y1 2 x2 2 y2 2 }
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;color { byte 1 }
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( clean up )
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;a { x 2 y 2 }
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;b { x 2 y 2 }
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;s { x 2 y 2 }
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;d { x 2 y 2 }
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;err { short 2 }
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;err2 { short 2 }
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|0100 @RESET
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@ -27,6 +35,11 @@
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#0038 #0078 #02 ,text ,draw-label JSR2
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#0048 #0088 #03 ,text ,draw-label JSR2
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#0058 #0098 #04 ,text ,draw-label JSR2
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#0020 #0020 #0070 #0080 #01 ,draw-line JSR2
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#0020 #0080 #0070 #0030 #02 ,draw-line JSR2
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#00a0 #0020 #0050 #00b0 #03 ,draw-line JSR2
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#00b0 #0090 #0030 #0010 #01 ,draw-line JSR2
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BRK
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@ -88,6 +101,38 @@ RTN
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RTN
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@draw-line ( x1 y1 x2 y2 )
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=color
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=b.y =b.x =a.y =a.x
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~b.x ~a.x SUB2 ABS2 =d.x
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~b.y ~a.y SUB2 ABS2 #0000 SWP2 SUB2 =d.y
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#ffff #00 ~a.x ~b.x LTS2 #0002 MUL2 ADD2 =s.x
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#ffff #00 ~a.y ~b.y LTS2 #0002 MUL2 ADD2 =s.y
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~d.x ~d.y ADD2 =err
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$loop
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~a.x =Screen.x ~a.y =Screen.y ~color =Screen.color
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,$end ~a.x ~b.x EQU2 ~a.y ~b.y EQU2 #0101 EQU2 JMP2?
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~err #0002 MUL2 =err2
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,$skipy ~err2 ~d.y LTS2 JMP2?
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~err ~d.y ADD2 =err
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~a.x ~s.x ADD2 =a.x
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$skipy
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,$skipx ~err2 ~d.x GTS2 JMP2?
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~err ~d.x ADD2 =err
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~a.y ~s.y ADD2 =a.y
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$skipx
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,$loop JMP2
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$end
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RTN
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@pict_small [
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ff80 8080 8080 8088 ffff fffc f8f9 f1f4
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@ -145,4 +190,4 @@ RTN
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|FF20 ;Sprite { pad 8 x 2 y 2 addr 2 color 1 }
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|FFF0 .RESET .FRAME .ERROR ( vectors )
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|FFF8 [ 0f0f 0fff 0ff0 ] ( palette )
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|FFF8 [ 13fd 1ef3 1bf2 ] ( palette )
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@ -2,74 +2,51 @@
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%RTN { JMP2r }
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%RTN? { JMP2r? }
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%ABS { DUP #07 SHR #ff SWP MUL? }
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%ABS2 { DUP2 #000f SFT2 #ffff SWP2 SWP POP MUL2? }
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;cursor { x 2 y 2 }
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;a { x 2 y 2 }
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;b { x 2 y 2 }
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;s { x 2 y 2 }
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;d { x 2 y 2 }
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;err { short 2 }
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;err2 { short 2 }
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;i { byte 1 }
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;color { byte 1 }
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|0100 @RESET
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#0020 #0020 #0070 #0080 ,draw-line JSR2
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#0020 #0080 #0070 #0030 ,draw-line JSR2
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#00a0 #0020 #0050 #00b0 ,draw-line JSR2
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#00b0 #0090 #0030 #0010 ,draw-line JSR2
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#0020 #0020 #0070 #0080 #01 ,draw-line JSR2
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#0020 #0080 #0070 #0030 #02 ,draw-line JSR2
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#00a0 #0020 #0050 #00b0 #03 ,draw-line JSR2
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#00b0 #0090 #0030 #0010 #01 ,draw-line JSR2
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BRK
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@draw-line ( x1 y1 x2 y2 )
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=b.y =b.x ( target, b )
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=a.y =a.x ( target, a )
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~a.x =Screen.x ~a.y =Screen.y #02 =Screen.color
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~b.x =Screen.x ~b.y =Screen.y #02 =Screen.color
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( dx = abs[bx - ax] )
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=color
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=b.y =b.x =a.y =a.x
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~b.x ~a.x SUB2 ABS2 =d.x
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( dy = -abs[by - ay] )
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~b.y ~a.y SUB2 ABS2 #0000 SWP2 SUB2 =d.y
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( sx = ax < bx ? 1 : -1; )
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#ffff #00 ~a.x ~b.x LTH2 #0002 MUL2 ADD2 =s.x
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( sy = ay < by ? 1 : -1; )
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#ffff #00 ~a.y ~b.y LTH2 #0002 MUL2 ADD2 =s.y
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( err = dx + dy )
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#ffff #00 ~a.x ~b.x LTS2 #0002 MUL2 ADD2 =s.x
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#ffff #00 ~a.y ~b.y LTS2 #0002 MUL2 ADD2 =s.y
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~d.x ~d.y ADD2 =err
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( loop )
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$loop
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( putchr[ax, ay, color]; )
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~a.x =Screen.x ~a.y =Screen.y #01 =Screen.color
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( if[ax == bx && ay == by] break; )
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~a.x =Screen.x ~a.y =Screen.y ~color =Screen.color
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,$end ~a.x ~b.x EQU2 ~a.y ~b.y EQU2 #0101 EQU2 JMP2?
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( fallback, remove )
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,$end ~i #90 GTH JMP2? ~i #01 ADD =i
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( err2 = 2 * err; )
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~err #0002 MUL2 =err2
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~err2 =Console.short
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( if[err2 >= dy] )
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,$skipy ~err2 ~d.y LTH2 JMP2?
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( err += dy; )
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,$skipy ~err2 ~d.y LTS2 JMP2?
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~err ~d.y ADD2 =err
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( ax += sx; )
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~a.x ~s.x ADD2 =a.x
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$skipy
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( if[err2 <= dx] )
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,$skipx ~err2 ~d.x GTH2 JMP2?
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( err += dx; )
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,$skipx ~err2 ~d.x GTS2 JMP2?
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~err ~d.x ADD2 =err
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( ay += sy; )
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~a.y ~s.y ADD2 =a.y
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$skipx
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@ -83,6 +60,12 @@ RTN
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|d000 @ERROR
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|FF00 ;Console { pad 8 char 1 byte 1 short 2 }
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|FF10 ;Screen { width 2 height 2 pad 4 x 2 y 2 color 1 }
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|FF20 ;Sprite { pad 8 x 2 y 2 addr 2 color 1 }
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|FF30 ;Controller { buttons 1 }
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|FF40 ;Keys { key 1 }
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|FF50 ;Mouse { x 2 y 2 state 1 chord 1 change 1 }
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|FF60 ;File { pad 8 name 2 length 2 load 2 save 2 }
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|FFF0 .RESET .FRAME .ERROR ( vectors )
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|FFF8 [ 13fd 1ef3 1bf2 ] ( palette )
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8
uxn.c
8
uxn.c
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@ -58,7 +58,9 @@ void op_div(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b
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void op_equ(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b == a); }
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void op_neq(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b != a); }
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void op_gth(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b > a); }
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void op_gts(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, (Sint8)b > (Sint8)a); }
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void op_lth(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b < a); }
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void op_lts(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, (Sint8)b < (Sint8)a); }
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/* --- */
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void op_lit16(Uxn *u) { u->literal += 2; }
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void op_nop16(Uxn *u) { printf("%04x\n", pop16(u->src)); }
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@ -87,18 +89,20 @@ void op_div16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push16(u->s
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void op_equ16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push8(u->src, b == a); }
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void op_neq16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push8(u->src, b != a); }
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void op_gth16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push8(u->src, b > a); }
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void op_gts16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push8(u->src, (Sint16)b > (Sint16)a); }
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void op_lth16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push8(u->src, b < a); }
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void op_lts16(Uxn *u) { Uint16 a = pop16(u->src), b = pop16(u->src); push8(u->src, (Sint16)b < (Sint16)a); }
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void (*ops[])(Uxn *u) = {
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op_brk, op_nop, op_lit, op_ldr, op_str, op_nop, op_jmp, op_jsr,
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op_equ, op_neq, op_gth, op_lth, op_and, op_ora, op_eor, op_sft,
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op_pop, op_dup, op_swp, op_ovr, op_rot, op_nop, op_cln, op_sth,
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op_add, op_sub, op_mul, op_div, op_nop, op_nop, op_nop, op_eor,
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op_add, op_sub, op_mul, op_div, op_nop, op_nop, op_gts, op_lts,
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/* 16-bit */
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op_brk, op_nop16, op_lit16, op_ldr16, op_str16, op_nop, op_jmp16, op_jsr16,
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op_equ16, op_neq16, op_gth16, op_lth16, op_and16, op_ora16, op_eor16, op_sft16,
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op_pop16, op_dup16, op_swp16, op_ovr16, op_rot16, op_nop, op_cln16, op_sth16,
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op_add16, op_sub16, op_mul16, op_div16, op_nop, op_nop, op_nop, op_nop
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op_add16, op_sub16, op_mul16, op_div16, op_nop, op_nop, op_gts16, op_lts16
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};
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Uint8 opr[][4] = { /* wstack-/+ rstack-/+ */
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