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Started implementing structs everywhere

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neauoire 2021-02-23 13:49:36 -08:00
parent 15bab0f74a
commit 720fc2f80b
8 changed files with 80 additions and 103 deletions
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59
README.md
View file

@ -24,33 +24,24 @@ evaluxn(u, u->vframe); /* Each frame
## Assembly Syntax
### Assign
- `ADD`, an opcode.
- `@label`, assign the current address to a label.
- `;variable 2`, assign an address to a label automatically.
- `:const 1a2b`, assign an address to a label manually.
- `&macro { x 2 y 2 }`, define a macro named `macro`.
### Write
- `ADD`, an opcode.
- `#1a`, a literal byte.
- `#12ef`, a literal short.
- `+1a`, a literal signed byte.
- `+12ef`, a literal signed short.
- `-1a`, a literal signed byte(negative).
- `-12ef`, a literal signed short(negative).
- `.ab`, a raw byte in memory.
- `.abcd`, a raw short in memory.
- `#1a`, a literal byte/short.
- `+1a`, a literal signed byte/short.
- `-1a`, a literal signed byte/short(negative).
- `.ab`, a raw byte/short in memory.
- `,literal`, push label address to stack, prefixed with `LIT LEN`.
### Special
- `( comment )`, toggle parsing on/off.
- `|0010`, move to position in the program.
- `"hello`, push literal bytes for word "hello".
- `=label`, helper to STR, equivalent to `,label STR`, or `label STR2`.
- `~label`, helper to LDR, equivalent to `,label LDR2`, or `,label LDR2`.
- `|0010`, move to position in the program.
- `<23`, move the program position `23` bytes backward.
- `>12`, move the program position `12` bytes forward.
- `( comment )`, toggle parsing on/off.
- `[ 0123 abcd ]`, write shorts to memory.
- `[ Hello World ]`, write text to memory.
### Operator modes
@ -60,25 +51,33 @@ evaluxn(u, u->vframe); /* Each frame
- `ADDS2?`, modes can be combined.
```
( comment )
( hello world )
:dev/w fff9 ( const write port )
|0100 @RESET
,string ( add string pointer to stack )
@loop
DUP2 LDR IOW ( write pointer value to console )
#0001 ADD2 ( increment string pointer )
DUP2 LDR #00 NEQ ,loop ROT JMP? POP2 ( while *ptr!=0 goto loop )
#00 =dev/w ( set dev/write to console )
,text1 ,print-label JSR ( print to console )
BRK
@string " Hello World " ( add string to memory )
@print-label ( text )
|c000 @FRAME BRK
|d000 @ERROR BRK
@cliloop
DUP2 LDR IOW ( write pointer value to console )
#0001 ADD2 ( increment string pointer )
DUP2 LDR #00 NEQ ,cliloop ROT JMP? POP2 ( while *ptr!=0 goto loop )
POP2
RTS
@text1 [ Hello World ] <1 .00 ( add text to memory, return 1 byte, add null byte )
|c000 @FRAME
|d000 @ERROR
|FFF0 [ f3f0 f30b f30a ] ( palette )
|FFFA .RESET .FRAME .ERROR
```

70
assembler.c
View file

@ -80,6 +80,18 @@ pushshort(Uint16 s, int lit)
pushbyte(s & 0xff, 0);
}
void
pushtext(char *s, int lit)
{
int i = 0;
char c;
if(lit)
pushbyte(0x22, 0);
while((c = s[i++]))
pushbyte(c, 0);
pushbyte(' ', 0);
}
Macro *
findmacro(char *s)
{
@ -253,54 +265,20 @@ skipblock(char *w, int *cap, char a, char b)
return 0;
}
int
skipstring(char *w, int *cap, Uint16 *addr)
{
if(w[0] == '"') {
if(*cap)
*addr += 1;
*cap = !(*cap);
return 1;
}
if(*cap) {
*addr += slen(w) + 1;
return 1;
}
return 0;
}
int
capturestring(char *w, int *cap)
{
if(w[0] == '"') {
if(*cap)
pushbyte(0x00, 0);
*cap = !(*cap);
return 1;
}
if(*cap) {
int i;
for(i = 0; i < slen(w); ++i)
pushbyte(w[i], 0);
pushbyte(' ', 0);
return 1;
}
return 0;
}
int
pass1(FILE *f)
{
int ccmnt = 0, cstrg = 0, cbits = 0;
int ccmnt = 0, cbits = 0;
Uint16 addr = 0;
char w[64];
printf("Pass 1\n");
while(fscanf(f, "%s", w) == 1) {
if(skipblock(w, &ccmnt, '(', ')')) continue;
if(skipstring(w, &cstrg, &addr)) continue;
if(skipblock(w, &cbits, '[', ']'))
addr += w[0] != '[' && w[0] != ']' ? 2 : 0;
else if(w[0] == '@') {
if(skipblock(w, &cbits, '[', ']')) {
if(w[0] == '[' || w[0] == ']')
continue;
addr += sihx(w) ? 2 : slen(w) + 1;
} else if(w[0] == '@') {
if(!makelabel(w + 1, addr, 0, NULL))
return error("Pass1 failed", w);
} else if(w[0] == ';') {
@ -317,6 +295,8 @@ pass1(FILE *f)
else {
switch(w[0]) {
case '|': addr = shex(w + 1); break;
case '<': addr -= shex(w + 1); break;
case '>': addr += shex(w + 1); break;
case '=': addr += 4; break; /* STR helper */
case '~': addr += 4; break; /* LDR helper */
case ',': addr += 3; break;
@ -335,7 +315,7 @@ pass1(FILE *f)
int
pass2(FILE *f)
{
int ccmnt = 0, cstrg = 0, cbits = 0, cmacro = 0;
int ccmnt = 0, cbits = 0, cmacro = 0;
char w[64];
printf("Pass 2\n");
while(fscanf(f, "%s", w) == 1) {
@ -345,10 +325,14 @@ pass2(FILE *f)
if(w[0] == '&') continue;
if(skipblock(w, &ccmnt, '(', ')')) continue;
if(skipblock(w, &cmacro, '{', '}')) continue;
if(capturestring(w, &cstrg)) continue;
/* clang-format off */
if(skipblock(w, &cbits, '[', ']')) { if(w[0] != '[' && w[0] != ']') { pushshort(shex(w), 0); } }
if(skipblock(w, &cbits, '[', ']')) {
if(w[0] == '[' || w[0] == ']') { continue; }
if(slen(w) == 4 && sihx(w)) pushshort(shex(w), 0); else pushtext(w, 0);
}
else if(w[0] == '|') p.ptr = shex(w + 1);
else if(w[0] == '<') p.ptr -= shex(w + 1);
else if(w[0] == '>') p.ptr += shex(w + 1);
else if((op = findopcode(w)) || scmp(w, "BRK", 4)) pushbyte(op, 0);
else if(w[0] == ':') fscanf(f, "%s", w);
else if(w[0] == ';') fscanf(f, "%s", w);

6
examples/blending.usm
View file

@ -2,15 +2,9 @@
:dev/w fff9 ( const write port )
;x1 2 ;y1 2
;x 2 ;y 2 ;color 1
|0100 @RESET
#02 =dev/w
#01 =color
#00 ,icon #0040 #0040 ,draw-sprite JSR
#01 ,icon #0048 #0040 ,draw-sprite JSR
#02 ,icon #0050 #0040 ,draw-sprite JSR

15
examples/devconsole.usm
View file

@ -2,27 +2,24 @@
:dev/w fff9 ( const write port )
;x 2 ;y 2 ;color 1
|0100 @RESET
( set dev/write to console )
#00 =dev/w
( print to console )
,text ,displaycli JSR
#00 =dev/w ( set dev/write to console )
,text1 ,print-label JSR ( print to console )
BRK
@displaycli
@print-label ( text )
@cliloop
DUP2 LDR IOW ( write pointer value to console )
#0001 ADD2 ( increment string pointer )
DUP2 LDR #00 NEQ ,cliloop ROT JMP? POP2 ( while *ptr!=0 goto loop )
POP2
RTS
RTS
@text " Hello World " ( add characters to memory )
@text1 [ Hello World ] <1 .00 ( add text to memory, return 1 byte, add null byte )
|c000 @FRAME
|d000 @ERROR

19
examples/devctrl.usm
View file

@ -3,15 +3,18 @@
:dev/r fff8 ( const read port )
:dev/w fff9 ( const write port )
;x 2 ;y 2 ;sprite 2
&Point2d { x 2 y 2 }
;pos Point2d
;sprite 2
|0100 @RESET
#03 =dev/r ( set dev/read to controller )
#02 =dev/w ( set dev/write to sprite )
#0080 =x #0040 =y ( origin )
#0080 =pos.x #0040 =pos.y ( origin )
#12 ,up_icn ~x ~y ,draw-sprite JSR
#12 ,up_icn ~pos.x ~pos.y ,draw-sprite JSR
BRK
@ -23,22 +26,22 @@ BRK
#00 IOR #10 NEQ ,next1 ROT JMP? POP2
,up_icn =sprite
~y #0001 SUB2 =y
~pos.y #0001 SUB2 =pos.y
@next1
#00 IOR #20 NEQ ,next2 ROT JMP? POP2
,down_icn =sprite
~y #0001 ADD2 =y
~pos.y #0001 ADD2 =pos.y
@next2
#00 IOR #40 NEQ ,next3 ROT JMP? POP2
,left_icn =sprite
~x #0001 SUB2 =x
~pos.x #0001 SUB2 =pos.x
@next3
#00 IOR #80 NEQ ,end ROT JMP? POP2
,right_icn =sprite
~x #0001 ADD2 =x
~pos.x #0001 ADD2 =pos.x
@end
( redraw )
#13 ~sprite ~x ~y ,draw-sprite JSR
#13 ~sprite ~pos.x ~pos.y ,draw-sprite JSR
BRK

2
examples/label.usm
View file

@ -29,7 +29,7 @@
BRK
@text " Hello World " ( add string to memory )
@text [ Hello World ] <1 .00 ( add characters to memory )
@draw-label ( x1 y1 text )
=y1 =x1

2
examples/struct.usm
View file

@ -15,7 +15,7 @@
#ff =red.r
~red.r
( short mode )_
( short mode )
#1234 =rc1.x
#abcd =rc1.height
~rc1.height

10
examples/window.usm
View file

@ -134,11 +134,11 @@ RTS
@checkoff_icn [ 7e81 8181 8181 817e ]
@checkon_icn [ 7e81 99bd bd99 817e ]
@text1 " Planet " ( add string to memory )
@text2 " To Jupiter "
@text3 " To Neptune "
@text4 " To Nereid "
@text5 " Theme "
@text1 [ Planet ] <1 .00 ( add string to memory )
@text2 [ To Jupiter ] <1 .00
@text3 [ To Neptune ] <1 .00
@text4 [ To Nereid ] <1 .00
@text5 [ Theme ] <1 .00
@font ( spectrum-zx font )
[