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Fix negation of 0.0 and -0.0

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This commit is contained in:
Thomas Preud'homme 2014-01-04 12:56:14 +08:00
parent 0382131c6f
commit 3eed3506b4
1 changed files with 15 additions and 2 deletions
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17
tccgen.c
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@ -3794,9 +3794,22 @@ ST_FUNC void unary(void)
break; break;
case '-': case '-':
next(); next();
vpushi(0);
unary(); unary();
gen_op('-'); t = vtop->type.t & VT_BTYPE;
/* handle (-)0.0 */
if ((vtop->r & (VT_VALMASK | VT_LVAL | VT_SYM)) == VT_CONST &&
is_float(t)) {
if (t == VT_FLOAT)
vtop->c.f = -vtop->c.f;
else if (t == VT_DOUBLE)
vtop->c.d = -vtop->c.d;
else
vtop->c.ld = -vtop->c.ld;
} else {
vpushi(0);
vswap();
gen_op('-');
}
break; break;
case TOK_LAND: case TOK_LAND:
if (!gnu_ext) if (!gnu_ext)