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added 'x'= operators

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bellard 2001-10-28 22:24:16 +00:00
parent 58f3296a6e
commit 9c1b84560e
1 changed files with 43 additions and 11 deletions
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54
tcc.c
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@ -88,9 +88,21 @@ char *idtable, *idptr, *idlast, *filename;
#define TOK_MID 0xa3 /* inc/dec, to void constant */
#define TOK_INC 0xa4
#define TOK_SHL 0xe0 /* warning: depend on asm code */
#define TOK_SHR 0xf8 /* warning: depend on asm code */
#define TOK_SHL 0x01
#define TOK_SHR 0x02
/* assignement operators : normal operator or 0x80 */
#define TOK_A_MOD 0xa5
#define TOK_A_AND 0xa6
#define TOK_A_MUL 0xaa
#define TOK_A_ADD 0xab
#define TOK_A_SUB 0xad
#define TOK_A_DIV 0xaf
#define TOK_A_XOR 0xde
#define TOK_A_OR 0xfc
#define TOK_A_SHL 0x81
#define TOK_A_SHR 0x82
#ifdef TINY
#define expr_eq() expr()
#endif
@ -242,13 +254,20 @@ void next()
#ifdef TINY
q = "<=\236>=\235!=\225++\244--\242==\224";
#else
q = "<=\236>=\235!=\225&&\240||\241++\244--\242==\224<<\340>>\370";
q = "<=\236>=\235!=\225&&\240||\241++\244--\242==\224<<\1>>\2+=\253-=\255*=\252/=\257%=\245&=\246^=\336|=\374";
#endif
/* two chars */
v = inp();
while (*q) {
if (*q == c & q[1] == v) {
tok = q[2] & 0xff;
if (tok == TOK_SHL | tok == TOK_SHR) {
v = inp();
if (v == '=')
tok = tok | 0x80;
else
ungetc(v, file);
}
return;
}
q = q + 3;
@ -416,8 +435,10 @@ void gen_op(op, l)
t = vt;
o(0x50); /* push %eax */
next();
if (l < 0)
if (l == -1)
expr();
else if (l == -2)
expr_eq();
else
sum(l);
gv();
@ -441,7 +462,10 @@ void gen_op(op, l)
#ifndef TINY
else if (op == TOK_SHL | op == TOK_SHR) {
o(0xd391); /* xchg %ecx, %eax, shl/sar %cl, %eax */
o(op);
if (op == TOK_SHL)
o(0xe0);
else
o(0xf8);
}
#endif
else if (op == '/' | op == '%') {
@ -760,20 +784,26 @@ void uneq()
int ft, fc, b;
unary();
if (tok == '=') {
if (tok == '=' |
(tok >= TOK_A_MOD & TOK_A_DIV) |
tok == TOK_A_XOR | tok == TOK_A_OR |
tok == TOK_A_SHL | tok == TOK_A_SHR) {
test_lvalue();
next();
fc = vc;
ft = vt;
b = (vt & VT_TYPE) == VT_BYTE;
if (ft & VT_VAR)
o(0x50); /* push %eax */
expr_eq();
if (tok == '=') {
next();
expr_eq();
#ifndef TINY
if ((vt & VT_PTRMASK) != (ft & VT_PTRMASK))
warning("incompatible type");
if ((vt & VT_PTRMASK) != (ft & VT_PTRMASK))
warning("incompatible type");
#endif
gv(); /* generate value */
gv(); /* generate value */
} else
gen_op(tok & 0x7f, -2); /* XXX: incorrect, must call expr_eq */
if (ft & VT_VAR) {
o(0x59); /* pop %ecx */
@ -1068,8 +1098,10 @@ int main(int c, char **v)
}
#else
t = vac[TOK_MAIN];
#ifndef TINY
if (!t)
error("main() not defined");
#endif
return (*t)(c - 1, v);
#endif
}