diff options
| -rwxr-xr-x[-rw-r--r--] | i386-gen.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/i386-gen.c b/i386-gen.c index 5ea70df..f8795c1 100644..100755 --- a/i386-gen.c +++ b/i386-gen.c @@ -686,10 +686,16 @@ ST_FUNC void gen_opi(int op) vswap(); c = vtop->c.i; if (c == (char)c) { - /* XXX: generate inc and dec for smaller code ? */ - o(0x83); - o(0xc0 | (opc << 3) | r); - g(c); + /* generate inc and dec for smaller code */ + if (c==1 && opc==0) { + o (0x40 | r); // inc + } else if (c==1 && opc==5) { + o (0x48 | r); // dec + } else { + o(0x83); + o(0xc0 | (opc << 3) | r); + g(c); + } } else { o(0x81); oad(0xc0 | (opc << 3) | r, c); |