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generate inc and dec for smaller code

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U-UNIT1\dennis 2010-04-03 21:20:34 +03:00
parent 27bcc8f583
commit d3c432244c
1 changed files with 10 additions and 4 deletions
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14
i386-gen.c Normal file → Executable file
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@ -686,10 +686,16 @@ ST_FUNC void gen_opi(int op)
vswap(); vswap();
c = vtop->c.i; c = vtop->c.i;
if (c == (char)c) { if (c == (char)c) {
/* XXX: generate inc and dec for smaller code ? */ /* generate inc and dec for smaller code */
o(0x83); if (c==1 && opc==0) {
o(0xc0 | (opc << 3) | r); o (0x40 | r); // inc
g(c); } else if (c==1 && opc==5) {
o (0x48 | r); // dec
} else {
o(0x83);
o(0xc0 | (opc << 3) | r);
g(c);
}
} else { } else {
o(0x81); o(0x81);
oad(0xc0 | (opc << 3) | r, c); oad(0xc0 | (opc << 3) | r, c);